US3773074A - Hydraulic control unit - Google Patents
Hydraulic control unit Download PDFInfo
- Publication number
- US3773074A US3773074A US00302727A US3773074DA US3773074A US 3773074 A US3773074 A US 3773074A US 00302727 A US00302727 A US 00302727A US 3773074D A US3773074D A US 3773074DA US 3773074 A US3773074 A US 3773074A
- Authority
- US
- United States
- Prior art keywords
- passage
- valve
- control block
- exterior surface
- base member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/08—Assemblies of units, each for the control of a single servomotor only
- F15B13/0803—Modular units
- F15B13/0832—Modular valves
- F15B13/0835—Cartridge type valves
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
- E02F3/80—Component parts
- E02F3/84—Drives or control devices therefor, e.g. hydraulic drive systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/08—Assemblies of units, each for the control of a single servomotor only
- F15B13/0803—Modular units
- F15B13/0807—Manifolds
- F15B13/0814—Monoblock manifolds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
- F15B2013/006—Modular components with multiple uses, e.g. kits for either normally-open or normally-closed valves, interchangeable or reprogrammable manifolds
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/87169—Supply and exhaust
Definitions
- a hydraulic control unit for controlling the position of a plow blade or the like includes a one-piece casting defining a common base portion for a selectively variable multifunction power unit.
- the common base portion is bored to provide passages for flow of hydraulic fluid from a pump.
- Several different one-piece control blocks are attachable to the common base portion for selectively varying the number of functions which the 42 Claims, 52 Drawing Figures 370 I I K" m 452 334 286 Patented Nov. 20, 1973 20 Sheets-Sheet 1 Patented Nov. 20, 1973 3,773,074
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
A hydraulic control unit for controlling the position of a plow blade or the like includes a one-piece casting defining a common base portion for a selectively variable multifunction power unit. The common base portion is bored to provide passages for flow of hydraulic fluid from a pump. Several different one-piece control blocks are attachable to the common base portion for selectively varying the number of functions which the power unit controls.
Description
United States Patent 11 1 1111 3,773,074 Miceli [4 Nov. 20, 1973 HYDRAULIC CONTROL UNIT Primary Examiner-Henry T. Klinksiek Inventor: Marc L. Miceli, Lyndhurst, Ohio Meyer Products Inc., Cleveland, Ohio Nov. 1, 1972 Assignee:
Filed:
Appl. No.:
References Cited UNITED STATES PATENTS 5/1970 Tarbox 137/596 power unit controls.
Assistant Examiner-Robert J. Miller Att0rneyJames H. Tilberry et al.
{57] ABSTRACT A hydraulic control unit for controlling the position of a plow blade or the like includes a one-piece casting defining a common base portion for a selectively variable multifunction power unit. The common base portion is bored to provide passages for flow of hydraulic fluid from a pump. Several different one-piece control blocks are attachable to the common base portion for selectively varying the number of functions which the 42 Claims, 52 Drawing Figures 370 I I K" m 452 334 286 Patented Nov. 20, 1973 20 Sheets-Sheet 1 Patented Nov. 20, 1973 3,773,074
20 Shoots-Shut 2 1 L1 T, L "M82 7 Patented Nov. 20, 1973 20 Sheets-Shoot .3
Patented Nov. 20, 1973 3,773,074
20 Sheets-Shoot 4 Patented Nov. 20, 1973 r 3,773,074
20 Sheets-Shut a L70 Q6 Q 7 1 Patented Nov. 20, 1973 110 Shootn-Shoot H Patented Nov. 20, 1973 3,773,074
20 Shoots-Shut Patented Nov. 20, 1973 3,773,074
20 Shoots-Shoot 1;
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Patentd Nov. 20, 1973 20 Shoots-Shoot 14 Patented Nov. 20, 1973 Patented Nov. 20, 1973 3,773,074
230 Shoo ta-Shut 1 Patented Nov. 20, 1973 3,773,074
20 Shoots-Shut 18 Patented Nov. 20, 1973 20 Shoota-Shnt-le;
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Claims (42)
1. A one-piece base member for a hydraulic power unit, said base member having an inner reservoir defining surface area and an inner ram defining surface area, said base member having an exterior surface, a pump inlet passage in said base member extending from said reservoir defining surface area to said exterior surface, a pump outlet passage in said base member extending therethrough from a first portion of said exterior surface to a second portion of said exterior surface, said pump outlet passage having a first pump outlet opening in said first portion of said exterior surface and a second pump outlet opening in said second portion of said exterior surface, a ram energizing passage in said base member extending from said exterior surface to said ram defining surface area, said ram energizing passage having a ram energizing passage opening in said exterior surface, a ram relief valve receiving bore in said base member, and a ram relief passage in said base member extending from said ram defining surface areA to said reservoir defining surface area through said ram relief valve receiving bore.
2. The base member of claim 1 wherein said ram energizing passage opening is in said second portion of said exterior surface, and further including plate means for attachment to said base member over said second portion of said exterior surface, said plate member having a plate surface facing said second portion of said exterior surface, a communicating passage in said plate member having first and second spaced-apart communicating passage openings in said plate surface, said first communicating passage opening being aligned with said second pump outlet opening, and said second communicating passage opening being aligned with said ram energizing passage opening.
3. The base member of claim 1 and further including a first return passage therein extending from said reservoir defining surface area to said exterior surface and having a first return passage opening in said exterior surface.
4. The base member of claim 3 wherein said ram energizing passage opening and said first return passage opening are in said second portion of said exterior surface, and further including plate means for attachment to said base member over said second portion of said exterior surface, said plate member having a plate surface facing said second portion of said exterior surface, a communicating passage in said plate member having first and second spaced-apart communicating passage openings in said plate surface, said first communicating passage opening being aligned with said second pump outlet opening, and said second communicating passage opening being aligned with said ram energizing passage opening, said first return passage opening being blocked by a plate surface portion of said plate surface.
5. The base member of claim 3 wherein said ram energizing passage opening and said first return passage opening are in said second portion of said exterior surface, and further including a one-piece first control block for attachment to said base member over said second portion of said exterior surface, said first control block having first and second spaced-apart valve receiving bores therein, said first control block having a first control block surface facing said second portion of said exterior surface of said base member, said first control block having first and second spaced-apart control block passages extending from said first control block surface to said first valve receiving bore, said first and second control block passages having first and second spaced-apart control block passage openings in said first control block surface, said first control block passage opening being aligned with said second pump outlet opening, said second control block passage opening being aligned with said ram energizing passage opening, a bore connecting passage connecting said first and second valve receiving bores, a return passage extending from said second bore to said first control block surface and having a return passage opening on said control block surface aligned with said return passage opening in said exterior surface of said base member, first and second spaced-apart bore outlet passages extending from said second valve receiving bore to the exterior surface of said first control block.
6. The device of claim 5 and further including a check valve bore in said bore connecting passage between said first and second valve receiving bores.
7. The device of claim 6 and further including a pilot operated check valve bore in said return passage from said second valve receiving bore to said first control block surface, and a pilot passage connecting said pilot operated check valve bore with said bore connecting passage.
8. The device of claim 7 and further including cross-over check valve bores and passages connecting said bore outlet passages from said second valve receiving bore.
9. The device of claim 5 and further including cross-over check valve bores and passages connecting said bore outlet Passages from said second valve receiving bore.
10. The base member of claim 3 and further including a second return passage extending from said reservoir defining surface area to said exterior surface and having a second return passage opening in said exterior surface.
11. The base member of claim 10 wherein said ram energizing passage opening and said first and second return passage openings are in said second surface portion of said exterior surface, and further including plate means for attachment to said base member over said second portion of said exterior surface, said plate member having a plate surface facing said second portion of said exterior surface, a communicating passage in said plate member having first and second spaced-apart communicating passage openings in said plate surface, said first communicating passage opening being aligned with said second pump outlet opening, and said second communicating passage opening being aligned with said ram energizing passage opening, said first and second return passage openings being blocked by a portion of said plate surface.
12. The base member of claim 10 wherein said ram energizing passage opening and said first and second return passage openings are in said second portion of said exterior surface, and further including a one-piece control block attachable to said base member over said second portion of said exterior surface, said control block having a facing exterior surface portion facing said second portion of said exterior surface of said base member and a remaining control block exterior surface, said control block having first, second, third and fourth valve receiving bores therein, first and second spaced-apart control block passages extending from said facing exterior surface portion to said first valve receiving bore and having first and second spaced-apart control block passage openings in said facing exterior surface portion, said first control block passage opening being aligned with said second pump outlet opening on said second surface portion of said base member, said second control block passage opening being aligned with said ram energizing passage opening on said second surface portion of said base member, a first bore connecting passage connecting said first and second valve receiving bores, a second bore connecting passage connecting said second and third valve receiving bores, a third bore connecting passage connecting said second and fourth valve receiving bores, first and second spaced-apart third valve receiving bore outlet passages extending from said third valve receiving bore to said remaining control block exterior surface, first and second spaced-apart fourth valve receiving bore outlet passages extending from said fourth valve receiving bore to said remaining control block exterior surface, a first return passage extending from said third valve receiving bore to said facing exterior surface portion and having a first return passage opening therein, a second return passage extending from said fourth valve receiving bore to said facing exterior surface portion and having a second return passage opening therein, said first and second return passage openings on said facing exterior surface of said control block being aligned with said first and second return passage openings in said second surface portion on said base member.
13. The device of claim 12 and further including first and second check valve bores in said second and third bore connecting passages.
14. The device of claim 13 and further including first and second pilot operated check valve bores in said first and second return passages in said control block, and first and second pilot passages extending respectively from said second bore connecting passage to said first pilot operated check valve bore and from said third bore connecting passage to said second pilot operated check valve bore.
15. The device of claim 14 and further including cross-over pressure relief bores and passages connecting said first and second oUtlet passages from said third valve receiving bore in said control block.
16. A one-piece control block for use with a hydraulic power unit, said block having a substantially plane connecting exterior surface and a remaining exterior surface, first and second spaced-apart valve receiving bores in said remaining exterior surface, first and second spaced-apart passages extending from said connecting exterior surface to said first valve receiving bore, a bore connecting passage connecting said first and second valve receiving bores, first and second spaced-apart outlet passages extending from said second valve receiving bore to said remaining exterior surface, and a return passage extending from said second valve receiving bore to said connecting exterior surface.
17. The control block of claim 16 and further including a check valve bore in said bore connecting passage.
18. The control block of claim 17 and further including a pilot operated check valve bore in said return passage, and a pilot passage extending from said bore connecting passage to said pilot operated check valve bore.
19. The control block of claim 18 and further including cross-over check valve relief bores and passages connecting said first and second outlet passages.
20. A one-piece control block for a hydraulic power unit, said block having a substantially plane connecting exterior surface and a remaining exterior surface, said block having first, second, third and fourth valve receiving bores in said remaining exterior surface, first and second spaced-apart passages extending from said connecting exterior surface to said first valve receiving bore, a first bore connecting passage extending from said first valve receiving bore to said second valve receiving bore, a second bore connecting passage extending from said second valve receiving bore to said third valve receiving bore, a third bore connecting passage extending from said second valve receiving bore to said fourth valve receiving bore, first and second spaced-apart passages extending from said third valve receiving bore to said remaining exterior surface, first and second spaced-apart passages extending from said fourth valve receiving bore to said remaining exterior surface, a first return passage extending from said third valve receiving bore to said connecting exterior surface, and a second return passage extending from said fourth valve receiving bore to said connecting exterior surface.
21. The control block of claim 20 and further including first and second check valve bores communicating respectively with said second and third bore connecting passages.
22. The control block of claim 20 and further including first and second pilot operated check valve bores communicating respectively with said first and second return passages.
23. The control block of claim 22 and further including first and second check valve bores communicating respectively with said second and third bore connecting passages.
24. The control block of claim 23 and further including cross-over relief check valve bores and passages interconnecting said passages extending from said third valve receiving bore.
25. The control block of claim 20 and further including cross-over relief check valve bores and passages interconnecting said passages extending from said third valve receiving bore.
26. A hydraulic power unit including a reservoir-ram unit including a reservoir and a ram and having a one-piece base member, pump means attached to said base member and having a pump inlet and a pump outlet, a pump inlet passage in said base member extending from said reservoir to said pump inlet, said base member having a control exterior surface and a pump connecting exterior surface, a pump outlet passage extending therethrough from said pump connecting surface to said control exterior surface and having a pump outlet opening in said control exterior surface, pump check valve means for checking reverse flow of hydraulic fluid through said pump outlet, a ram Energizing passage extending from said control exterior surface to said ram and having a ram energizing passage opening in said control exterior surface, a ram relief valve attached to said base member and having first and second positions, a ram relief passage extending from said ram to said reservoir through said ram relief valve, said ram relief valve blocking flow of fluid through said ram relief passage in said first position thereof and opening said ram relief passage to flow of fluid from said ram to said reservoir in said second position thereof, and a one-piece control block attached to said base member over said control exterior surface, said control block having connecting passage means for interconnecting said pump outlet opening in said control exterior surface and said ram energizing passage opening in said control exterior surface, whereby energization of said pump means with said ram relief valve in said first position supplies fluid to said ram for extending said ram and movement of said ram relief valve to said second position with said pump means de-energized retracts said ram by exhausting fluid from said ram to said reservoir.
27. The device of claim 26 wherein said control block comprises a one-piece plate member having said connecting passage means therein.
28. The device of claim 26 wherein said base member includes a first return passage extending between said control exterior surface and said reservoir and having a first return passage opening in said control exterior surface.
29. The device of claim 28 wherein said control block includes a plate member having a blocking surface for blocking said first return passage opening.
30. The device of claim 28 and further including a second return passage in said base member extending from said control exterior surface to said reservoir and having a second return passage opening in said control exterior surface.
31. The device of claim 30 wherein said control block includes a blocking surface for blocking said first and second return passage openings in said control exterior surface.
32. The device of claim 26 and further including a first return passage in said base member extending from said control exterior surface to said reservoir and having a first return passage opening in said control exterior surface, said control block having first and second selector valves thereon movable between first and second positions, said control block having a connecting exterior surface facing said control exterior surface on said base member and a remaining exterior control block surface, first and second spaced-apart control block passages extending from said control block connecting surface to said first selector valve, said first and second control block passages defining said connecting passage means, said first control block passage communicating with said pump outlet passage opening in said control exterior surface and said base member and said second control block passage communicating with said ram energizing passage opening in said control exterior surface of said base member, a valve connecting passage connecting said first and second selector valves, said first selector valve being operative in said first position thereof to establish fluid flow therethrough from said first control block passage to said second control block passage and to block fluid flow therethrough from said first control block passage to said valve connecting passage, said first selector valve being operative in said second position thereof to block fluid flow therethrough from said first control block passage to said second control block passage and to establish fluid flow therethrough from said first control block passage to said valve connecting passage, first and second spaced-apart operating passages extending from said second selector valve to said remaining control block exterior surface, a control block return passage extending from said second selector valve to said control block connecting surface and communicating wIth said first return passage in said base member, said second selector valve being operative in said first position thereof to establish fluid communication therethrough from said valve connecting passage to said first operating passage and from said second operating passage to said control block return passage and to block fluid flow therethrough from said valve connecting passage to said second operating passage and said control block return passage, said control block being operative in said second position thereof to establish fluid flow therethrough from said valve connecting passage to said second operating passage and from said first operating passage to said control block return passage, and to block fluid flow therethrough from said valve connecting passage to said first operating passage and said control block return passage.
33. The device of claim 32 and further including check valve means in said valve connecting passage for allowing fluid flow from said first selector valve to said second selector valve and blocking fluid flow from said second selector valve to said first selector valve.
34. The device of claim 33 and further including a pilot operated check valve in said control block return passage, a pilot passage extending from said valve connecting passage to said pilot operated control valve, said pilot operated check being movable between a closed position blocking fluid flow therethrough from said second selector valve and an open position allowing fluid flow therethrough from said second selector valve, said pilot operated check valve being in said closed position when said first selector valve is in said first position so that no fluid is flowing under pressure through said valve connecting passage, said pilot operated check valve being in said open position when said first selector valve is in said second position so that fluid is flowing under pressure through said valve connecting passage and into said pilot passage to move said pilot operated check valve to said open position.
35. The device of claim 34 and further including a pair of cross-over relief check valves interconnecting said first and second operating passages, said cross-over relief check valves being normally closed to block communication between said first and second operating passages and being openable under predetermined pressure in either of said first or second operating passages to establish fluid flow therebetween.
36. The device of claim 32 and further including a second return passage in said base member extending from said control exterior surface to said reservoir and having a second return passage opening in said control exterior surface, said control block having a blocking surface for blocking said second return passage opening.
37. The device of claim 26 and further including first and second spaced-apart return passages in said base member extending from said control exterior surface to said reservoir, said control block having spaced-apart first, second, third and fourth selector valves movable between first and second positions, said control block having a connecting exterior surface facing said control exterior surface on said base member and a remaining exterior control block exterior surface, first and second spaced-apart control block passages extending from said connecting exterior surface to said first selector valve, said first and second passages defining said connecting passage means, said first control block passage communicating with said pump outlet passage opening in said control surface of said base member and said second control block passage communcating with said ram energizing passage opening in said control exterior surface of said base member, a first valve connecting passage connecting said first and second selector valves, said first selector valve being operative in said first position thereof to establish fluid flow therethrough from said first control block passage to said second control block passage and to block fluid flow therethRough from said first control block passage to said first valve connecting passage, said first selector valve being operative in said second position thereof to block fluid flow therethrough from said first control block passage to said second control block passage and to establish fluid flow therethrough from said first control block passage to said first valve connecting passage, a second valve connecting passage extending from said second selector valve to said third selector valve, a third valve connecting passage extending from said second selector valve to said fourth selector valve, said second selector valve being operative in said first position thereof to establish fluid flow therethrough from said first valve connecting passage to said second valve connecting passage and to block fluid flow therethrough from said first valve connecting passage to said third valve connecting passage, said second selector valve being operative in said second position thereof to establish fluid flow therethrough from said first valve connecting passage to said third valve connecting passage and to block fluid flow therethrough from said first valve connecting passage to said second valve connecting passage, first and second spaced-apart operating passages extending from said third selector valve to said remaining exterior surface of said control block, a first control block return passage extending from said third selector valve to said control block connecting exterior surface, and communicating with said first return passage on said base member, said third selector valve being opeartive in said first position thereof to establish fluid flow therethrough from said second valve connecting passage to said first operating passage and from said second operating passage to said first return passage and to block fluid flow from said second valve connecting passage to said second operating passage and said first return passage, said third selector valve being operative in said second position thereof to establish fluid flow from said second valve connecting passage to said second operating passage and from said first operating passage to said first return passage and to block fluid flow therethrough from said second valve connecting passage to said first operating passage and said first return passage, spaced-apart third and fourth operating passages extending from said fourth selector valve to said remaining control block exterior surface, a second control block return passage extending from said fourth selector valve to said connecting exterior surface and communicating with said second return passage in said base member, said fourth selector valve being operative in said first position thereof to establish fluid flow therethrough from said third valve connecting passage to said third operating passage and from said fourth operating passage to said second return passage and to block fluid flow therethrough from said third valve connecting passage to said fourth operating passage and said second return passage, and said fourth selector valve being operative in said second position thereof to establish fluid flow therethrough from said third valve connecting passage to said fourth operating passage and from said third operating passage to said second return passage and to block fluid flow therethrough from said third valve connecting passage to said third operating passage and said second return passage.
38. The device of claim 37 and further including first and second check valves respectively in said second and third valve connecting passages for allowing fluid flow from said second selector valve to said third and fourth selector valves and blocking fluid flow from said third and fourth selector valves to said second selector valve.
39. The device of claim 38 and further including first and second pilot operated check valves respectively in said first and second control block return passages, a first pilot passage extending from said second valve connecting passage to said first pIlot operated check valve, a second pilot passage extending from said third valve connecting passage to said second pilot operated check valve, said first and second pilot operated check valves being normally closed to block fluid flow through said first and second control block return passages from said third and fourth selector valves, said pilot operated check valves being movable to open position to allow fluid flow through said first and second control block return passages by fluid flowing under pressure through said second and third valve connecting passages and into said first and second pilot passages.
40. The device of claim 39 and further including cross-over pressure relief check valve means interconnecting said first and second operating passages, said relief check valve means being normally closed to block fluid flow between said first and second operating passages and being movable to open position under predetermined pressure in either of said first and second operating passages to establish fluid flow therebetween.
41. A power unit and control device for controlling the position of a plow blade including an extendable and retractable ram for raising and lowering said blade and power angling cylinder means for angling said blade in either of opposite directions, said device including a reservoir-ram unit having a one-piece base member and a one-piece control block directly connected to said base member, said base member and control block having a plurality of interconnected passageways bored therein and connected through selector valve means for selectively extending and retracting said ram to raise and lower said blade and for selectively energizing said power angling cylinder means to angle said blade to a desirable position.
42. The device of claim 41 wherein said base member and one-piece control block further include interconnected passageways bored therein and connected through selector valve means for selectively controlling energization of an additional plow blade.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US30272772A | 1972-11-01 | 1972-11-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3773074A true US3773074A (en) | 1973-11-20 |
Family
ID=23168963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US00302727A Expired - Lifetime US3773074A (en) | 1972-11-01 | 1972-11-01 | Hydraulic control unit |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3773074A (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2745155A1 (en) * | 1976-10-22 | 1978-04-27 | Modular Controls Corp | HYDRAULIC BLOCK VALVE |
| US4167200A (en) * | 1976-04-02 | 1979-09-11 | La Telemechanique Electrique | Distribution device for a pneumatic installation |
| US4244122A (en) * | 1979-06-04 | 1981-01-13 | Meyer Products, Inc. | Modified power unit for snow plows |
| GB2212562A (en) * | 1987-10-14 | 1989-07-26 | Kinetrol Ltd | Actuator control means |
| US5049027A (en) * | 1990-02-21 | 1991-09-17 | Komatsu Dresser Company | Hydro-electric tool lock |
| US5125174A (en) * | 1991-04-15 | 1992-06-30 | Douglas Dynamics, Inc. | Removable snowflow with a pivotable lift stand |
| FR2703112A1 (en) * | 1993-03-26 | 1994-09-30 | Segura Salvador Silvia Belen | Distribution block for hydraulic braking system of reel holders. |
| USRE35700E (en) * | 1991-04-15 | 1997-12-30 | Douglas Dynamics, L.L.C. | Removable snowplow assembly with pivotable lift stand |
| US6138388A (en) * | 2000-02-22 | 2000-10-31 | The Louis Berkman Company | Plug system for a snowplow |
| US20040187359A1 (en) * | 2003-03-26 | 2004-09-30 | Manabu Nishi | Power tilt apparatus |
| US20070108836A1 (en) * | 2003-08-06 | 2007-05-17 | Continental Teves Ag & Co. Ohg | Electrohydraulic brake system for motor vehicles |
| US7631442B2 (en) | 2005-03-01 | 2009-12-15 | Louis Berkman Winter Products Company | Modular hydraulic power mechanism |
| US20190264714A1 (en) * | 2018-02-28 | 2019-08-29 | Cowan Dynamics Inc. | Electro-hydraulic valve actuator having modular manifold with configurable redundancy |
| JPWO2018173823A1 (en) * | 2017-03-23 | 2020-01-23 | 日本電産トーソク株式会社 | Oil pump device |
| US11401957B2 (en) * | 2018-05-07 | 2022-08-02 | Eaton Intelligent Power Limited | Integrated gear pump in remote mounted hydraulic control unit |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3513876A (en) * | 1968-04-09 | 1970-05-26 | Akro Tec Inc | Valve manifold module and system |
-
1972
- 1972-11-01 US US00302727A patent/US3773074A/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3513876A (en) * | 1968-04-09 | 1970-05-26 | Akro Tec Inc | Valve manifold module and system |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4167200A (en) * | 1976-04-02 | 1979-09-11 | La Telemechanique Electrique | Distribution device for a pneumatic installation |
| DE2745155A1 (en) * | 1976-10-22 | 1978-04-27 | Modular Controls Corp | HYDRAULIC BLOCK VALVE |
| US4244122A (en) * | 1979-06-04 | 1981-01-13 | Meyer Products, Inc. | Modified power unit for snow plows |
| GB2212562A (en) * | 1987-10-14 | 1989-07-26 | Kinetrol Ltd | Actuator control means |
| US4964273A (en) * | 1987-10-14 | 1990-10-23 | Kinetrol Limited Of Trading Estate | Subplate-mounted control valves in convertible oscillator drive system |
| GB2212562B (en) * | 1987-10-14 | 1992-04-15 | Kinetrol Ltd | Actuator control means |
| US5049027A (en) * | 1990-02-21 | 1991-09-17 | Komatsu Dresser Company | Hydro-electric tool lock |
| USRE35700E (en) * | 1991-04-15 | 1997-12-30 | Douglas Dynamics, L.L.C. | Removable snowplow assembly with pivotable lift stand |
| US5125174A (en) * | 1991-04-15 | 1992-06-30 | Douglas Dynamics, Inc. | Removable snowflow with a pivotable lift stand |
| FR2703112A1 (en) * | 1993-03-26 | 1994-09-30 | Segura Salvador Silvia Belen | Distribution block for hydraulic braking system of reel holders. |
| BE1007468A3 (en) * | 1993-03-26 | 1995-07-11 | Silvia Belen Segura Salvador | Block distribution for hydraulic brake system supports holder coil. |
| US6138388A (en) * | 2000-02-22 | 2000-10-31 | The Louis Berkman Company | Plug system for a snowplow |
| US6256909B1 (en) | 2000-02-22 | 2001-07-10 | The Louis Berkman Company | One plug system for a snowplow |
| US20040187359A1 (en) * | 2003-03-26 | 2004-09-30 | Manabu Nishi | Power tilt apparatus |
| US7069675B2 (en) * | 2003-03-26 | 2006-07-04 | Showa Corporation | Power tilt apparatus |
| US20070108836A1 (en) * | 2003-08-06 | 2007-05-17 | Continental Teves Ag & Co. Ohg | Electrohydraulic brake system for motor vehicles |
| US7631442B2 (en) | 2005-03-01 | 2009-12-15 | Louis Berkman Winter Products Company | Modular hydraulic power mechanism |
| JPWO2018173823A1 (en) * | 2017-03-23 | 2020-01-23 | 日本電産トーソク株式会社 | Oil pump device |
| US20190264714A1 (en) * | 2018-02-28 | 2019-08-29 | Cowan Dynamics Inc. | Electro-hydraulic valve actuator having modular manifold with configurable redundancy |
| US11401957B2 (en) * | 2018-05-07 | 2022-08-02 | Eaton Intelligent Power Limited | Integrated gear pump in remote mounted hydraulic control unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: LOUIS BERKMAN COMPANY, THE, OHIO Free format text: MERGER;ASSIGNORS:LOUIS BERKMAN COMPANY, THE;MEYER PRODUCTS, INC.;ORVILLE PRODUCTS, INC.;AND OTHERS;REEL/FRAME:005060/0729 Effective date: 19861211 Owner name: LOUIS BERKMAN COMPANY, THE, AN OH CORP., STATELESS Free format text: MERGER;ASSIGNORS:LOUIS BERKMAN COMPANY, THE, AN OH CORP.;MEYER PRODUCTS, INC., A OHIO CORP.;ORVILLE PRODUCTS, INC., A OHIO CORP.;AND OTHERS;REEL/FRAME:005060/0729 Effective date: 19861211 |