US1166028A - Fluid-motor. - Google Patents

Description

Patented Dec. 28, 1915.

2 SHEETS-SHEET 1 m m m 2 0 m 7 WITNESSES:

ATTDRNEY.

C. C. WILKINSON.

FLUID MOTOR.

APPLICATION FILED NOV. 24-, 1 913. 1,166,028, Patented Dec.28,1915.

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CHARLES CLAUDE WILKINSON, OF SALEM, OHIO.

FLUID-Moron.

Specification of Letters Patent.

Patented Dec. 28, 1915.

Application filed November 24, 1913. Serial N0. 802,631.

To all whom it may concern: I

Be it known that 1, CHARLES CLAUDE WIL- KINSON, a citizen of the United States of America, and resident of Salem, county of Columbiana, and State of Ohio, have invented certain new and useful Improvements in Fluid-Motors, of which the following a specification.

This invention relates broadly to fluid motors, and particularly toa motor which may be driven by water, steam, or other actuating fluid.

The primary object of the invention is to provide a motor of the reciprocating piston type which is positive in its operation and which is devoid of springs and like elements for efi'ecting the unseating and shifting of the fluid-controlling valves.

A further object is to providea motor of the character mentioned which is of simple and durable construction and which when set in operation, will continue to operate indefinitely without attention.

With these and other objects in view, the invention resides in the features of construction, arrangement of parts and combinations of elements which will hereinafter be fully described, reference being had to the accompanying drawings, forming a part of this specification, in which'- Figure 1 is a top plan view of the invention; Fig. 2 is a side elevation of thesame;

Fig. 3 is a vertical longitudinal section on the line 33, Fig. 1; Figs. L and 5 are horizontal sections taken respectively on the lines 1-4 and 55, Fig. 2; and Fig. 6 is a transverse section on the line 66, Fig. 5.

Referring to said drawings, in which like characters designate like parts throughout the several views1 indicates a cylinder casing and 2 a valve casing, said casings being preferably formed in a single metal casting having a longitudinal piston chamber 3 and a longitudinal valve chamber 4: formed therein, which chambers are separated by an intervening wall 5. The ends of the piston chamber are closed by cylinder heads 6 and 7, the former having a suitable gland-closed stuffing-box 8 formed therein through which extends a piston rod 9 which connects the reciprocable piston 10 operating within the cylinder to the mechanism which is to be driven.

The ends of the valve chamber are closed by heads 11 and 12 which respectively carry thereon, or have formed integral therewith, outwardly directed bonnets 13 and 1 1 in which are respectively provided cylindrical pockets 13 and 14: which are alined axially with said valve chamber. Slidably mounted within said pockets are the opposite endportions or stems 15 of a balanced valve of the double piston type which is herein designated generally by the numeral 15. Said valve comprises a pair of valve-members or piston portions 15 and 15 spaced apart to accurately cover and uncover ports or passages at predetermined times, as will herein after be explained, an intermediate stern portion 15 of less diameter than the valve chamber, and said end stems 15. Suitable packing rings 16 are carried by said valvemembers 15 and 15' as shown, and suitable packing 17 is provided on the end stems 15 for preventing leakage between the pockets 13 and 14: and the valve chamber 4:.

Leading through the valve casing 2 into the valve-chamber at a substantially central point, so as to at all times be in open communication with said chamber at a point between the valve members or piston portions 15 and 15 is an inlet port 18 for the ac tuating fluid. Located in said valve-casing adjacent to the opposite ends of the latter are exhaust ports 19 and 20 which are outside the limits of movement of said piston portions and which are consequently alternately opened to the exhaust of fluid through said chamber with the forward and rearward movements of the valve 15.

Leading from the valve-chamber to the interior of the cylinder, or piston chamber, at opposite ends of the latter are fluid passages 21 and 22, each of which is alternately an inlet passage and an exhaust passage for the actuating fluid, saidpassages communicating with said valve chamber at points where they will be alternately opened to fluid entering the chamber through the inlet port 18 and passing around the stem portion 15 of the valve, and opened to permit exhaust fluid from the cylinder to pass around the end stems of the valve to the exhaust ports. In other words, said passages 21 and 22 communicate with the valve chamber at points which are crossed by the piston portions 15 and 15" with each movement of the valve, whereby each of said passages is alternately an inlet passage to and an exhaust passage from the cylinder.

Leading through the walls of the casting in which the piston and valve chambers are formed, suitable rib-like portions 23 and 24cbeing formed in the casting for the purpose, are fluid passages 25 and 26, each of said passages having communication at one end, through one or more ports 27, with the interior of the cylinder at a point adjacent to the middle thereof and at its opposite end with the outer end of one of the pockets of the bonnets provided at opposite ends of the-valve chamber. The ports 27 are not only so located that but one thereof can be uncovered at a time by the piston 10, which is made of a length approximating onehalf the length of'the cylinder, but also that said ports are opened for brief intervals only. As is obvious, when one of said ports 27 is opened by the movement of the piston from covering relation thereto, a portion of the pressure fluid which is producing such movement of the piston passes through said port and thencethrough the communicating passage to the pocket, andthere exerts a pressure which thrusts the valve 15 across from that end of the valve chamber to the opposite end. The fluid in the opposite pocket at the same time exhausts therefrom through a passage 28, leading through the bonnet wall, to the end of the valve-chamber, thereby relieving resistance to move ment of said valve.

The piston 10 is cupped out at opposite ends,providing cavities 29 and 30, andre cesses 31 and-'32 are provided respectively in the'inner faces of the cylinder heads 6 and 7, said recesses being adaptedto admit fluid from the passages 21 and .22 to the cavities 29 and 30, respectively, when the piston occupies positions at the extreme-ends of itsstroke, for-initially starting said piston on its return stroke. The cavities 29 and 30further afford or constitute counter- Sinks in which are received, nuts 33, by means ofrwhich the piston is rigidly connected to the piston rod.

Assuming that the parts occupy the positions illustrated in Figs. 8, 4L and5,.wherein the piston is shown at the endofits forwardstroke, the actuating fluid entering through theinlet port 18 passes arouudthe centralstem'portion 15"; to passage2 A small portion of the fluid then passes through recess behind the piston and initially moves the latter away from cylinder head 7 to admit the full volume of the fluid in the said passage 22, which forces the piston along the cylinder to the end of its return stroke. As said piston is thus returned, the fluid in front thereof exhausts through passage 21 tothe valve-chamber at a point Which is then on the outer side of valvechamber 15, thence passes around the adjacent endste1n 15 and outward through exhaust port 19. Just prior to reaching the end of its said return stroke, the piston uncovers the port 27 which communicates with passage 26 leading to pocket 14 in bonnet 1e, allowing pressure fluid to pass to said pocket in suflicient volume to shift the valve 15 across to its opposite position. This action carries valve-member 15 across to the opposite side of the end of passage 22 and carries valve-member 15 across to the opposite side of the end of passage 21, thus opening said passage 21 to the pressure fluid admitted through the inlet port 18 and simultaneously opening passage 22 for the passage of exhaust fluid from the forward end of thecylinder, said exhaust fluid being directed around the adjacent end stem 15 and out through exhaust port 20. x

Just prior to itsreaching the end of its forward stroke, the piston uncovers the port 27 which communicates with passage 25 leading to pocket l flallowing pressure fluid to passto said pocket for shifting the valve 15 to its oppositeseat, thus diverting the pressure and exhaust fluids and accomplishing the reversal of the piston, as hereinbefore explained.

From theforegoing it will be seen that ployed as a water motor for driving various kinds ofmachinery; as thedriving end of a steam pump; as the drivingfend of vacuum pump using steam, compressed air,

orwater as actuating fluid, etc.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, isr V V A fluid motor comprising a cylinder, a piston operable therein, a valve chamber communicative with the cylinder, a piston valve in the chamber for controlling: (30111-1 munication between the cylmder and cham.-

ber andprovided with a-stern, ahead for the chamberhavmg a pocket to receive the stem of the valve and a constantly opened exhaust passage leading from the outer end 7 of the pocket and opening through the inner face of the head into the valve chamber toward the piston portion of the Valve, inlet and exhaust ports provided in the valve chamber with the exhaust port being in constant communication With the exhaust passage of the chamber head, and a passage 10 closable by the piston and adapted for establishing communication between the cylinder and the outer end of the pocket of the head.

In testimony whereof, I aflix my signature in presence of tWo subscribing Witnesses.

CHARLES CLAUDE WILKINSON.

WVitnesses:

A. J. CALLAHAN, HILDA SCHMITT.

Copies of this patent may be obtained. for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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