GB1123165A - Improvements in and relating to piston-and-ring assemblies - Google Patents
Improvements in and relating to piston-and-ring assembliesInfo
- Publication number
- GB1123165A GB1123165A GB912466A GB912466A GB1123165A GB 1123165 A GB1123165 A GB 1123165A GB 912466 A GB912466 A GB 912466A GB 912466 A GB912466 A GB 912466A GB 1123165 A GB1123165 A GB 1123165A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- rings
- groove
- ring
- sides
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/26—Sealings between relatively-moving surfaces with stuffing-boxes for rigid sealing rings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/10—Special members for adjusting the rings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
1,123,165. Pistons. CROSS MANUFACTURING CO. (1938) Ltd. 1 Feb., 1967 [2 March, 1966], No. 9124/66. Heading F2T. A piston and ring assembly comprises a piston having a radially outer part 4 of its crown 1 mounted for limited axial movement relative to the main body of the piston, a piston groove of which one side 13 is an under face of the crown part 4 and the opposite side 14 is formed on the piston, one or more split rings 15, 16 in the groove, the ring or at least one of the rings being adapted to engage the cylinder wall 3, and at least two surfaces inclined to the axis of the piston and adapted to slide one on the other whereby movement of the sides of the groove towards one another due to axial movement of the crown part 4 causes the ring or at least one of the rings to be expanded outwardly in the groove, the ring or rings comprising at least one turn of a helix. The crown part 4 is sealed to the piston by a ring 7 and resiliently secured to the piston by bolts 17, a gap being provided between facing surfaces 9 and 24 on the part 4 and the piston respectively and the sides 13 and 14 being urged together by springs 21 located between a step 20 on the piston and nuts 22 on the bolts. The sides 13 and 14 are inclined to the piston axis and the groove contains three outer rings 15 and two inner rings 16 all of truncated isosceles triangular section and constituting together one turn of a five start helix. In use, the rings 15 are urged outwardly into contact with cylinder wall and the rings 16 are urged inwardly against the base 12 of the piston groove by the springs 21 and/or the force due to the cylinder pressure acting on the crown part 4. A bearing ring 25 may be fitted in the piston skirt 2. In a modification, Fig. 2, a single ring 215 is fitted between the groove sides 213 and 214 which may be similarly and oppositely inclined or, as shown dotted, one side 214a may be normal to the piston axis. In other modifications, Figs. 3-5 (not shown), one inner and one outer ring are housed in the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB912466A GB1123165A (en) | 1966-03-02 | 1966-03-02 | Improvements in and relating to piston-and-ring assemblies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB912466A GB1123165A (en) | 1966-03-02 | 1966-03-02 | Improvements in and relating to piston-and-ring assemblies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1123165A true GB1123165A (en) | 1968-08-14 |
Family
ID=9865825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB912466A Expired GB1123165A (en) | 1966-03-02 | 1966-03-02 | Improvements in and relating to piston-and-ring assemblies |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1123165A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2439340A1 (en) * | 1978-10-16 | 1980-05-16 | Ducroux Roger | Annular seals comprising steel or PTFE hoops with oblique interference - for sealing large bore, high pressure pneumatic, hydraulic or mechanical systems, esp. butterfly valves |
| GB2127937A (en) * | 1982-09-29 | 1984-04-18 | Koppers Co Inc | Half-keystone compression ring |
| CN108131216A (en) * | 2017-12-25 | 2018-06-08 | 潍柴动力股份有限公司 | Piston ring and engine |
-
1966
- 1966-03-02 GB GB912466A patent/GB1123165A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2439340A1 (en) * | 1978-10-16 | 1980-05-16 | Ducroux Roger | Annular seals comprising steel or PTFE hoops with oblique interference - for sealing large bore, high pressure pneumatic, hydraulic or mechanical systems, esp. butterfly valves |
| GB2127937A (en) * | 1982-09-29 | 1984-04-18 | Koppers Co Inc | Half-keystone compression ring |
| CN108131216A (en) * | 2017-12-25 | 2018-06-08 | 潍柴动力股份有限公司 | Piston ring and engine |
| CN108131216B (en) * | 2017-12-25 | 2024-03-19 | 潍柴动力股份有限公司 | Piston ring and engine |
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