lOct. 8, 1,946. J. F. McGLONE 2,408,795 ~coru'nor. mms FoR FLUID PRESSURE uoToRs Filèd Harsh 22, 1944 QN 2 sheets-sheet 1 oct. 8,'1946. .1.V F. McGLoNE 2, v I 'CONTROL MEANS FOR FLUID PRESSURE Mo'roRs- ' Filed March 22, 1944 . ,795 ' ` 2 vSheets-Sheet 2 N _ Inventor* dba/v E' MSGLONE. 9O QAM. www ‘ï’fß?fmäm Patented Oct. y8, ‘i946 ï , Y J " ' I , y' ' . " , ‘52,408,795’ I 2,408,795 ’i MEANS FOR rtm1) reirse-Unir4 fooN'rRon _ Y vMo'rons f « `.reims F. Meolone, sañniego, Calif. - ¿ `Application March 22, 1941i,V Serial No. 527,563 , 2 spectively, whichflead to a fluid ' This invention relates to reciprocating fluid reservoir, I not 4 pressure motors and has rfor one of yitsimportant objects the provision of a means for c_ontrolling shown. „ _ ,- , «, v „ v, , l ’ I _The__piston rods ‘I and IBMare connected to gether outside of their cylinders by a connecting and regulating lthe extent of movement of the power piston of such a motor, , . rod 22. .This rod is rigidly„secured. at v23 to the Ul Q connecting rod v'I and .has its Vopposite end bi Another object is to provide a simple and eni cientV means, whereby’the stroke of the power furcated or forked to fit'voveracollar 25` between. its shoulders 25 and 2l, thus permitting'- the con piston of a fluid pressure motor may be positively necting rod IS to rotate relative to rod 22. controlled and regulated. , ' The outer end of the rod 22 is square and re Another object is to provide a control means 10 ceives thereon a sleeve 28 having a crank 29 pro of the above kind that may be readily rendered vided with a handle 3U. The sleeve 28 has a inoperative for allowing the power piston to oper square bore in order to snugly ñt over the square ate with its normal full stroke. _, portion of the rod I6, and in the crank 29 is an These and other objects will appear from the aperture 32 through which a bolt 33 passes. Bolt following speciñcation, when considered in con 33 receives a wing nut 34 which, when tightened, nection with the accompanying drawings, in will hold the crank ñrmly against movement, the bolt 33 passing through a slot 36 of a graduated arcuate gauge bar 35. trolling and regulating means embodying the 20 The operation of the motor and control means therefor is as follows: present invention. Assuming the parts are in the positions illus Figure 2 is a vertical section taken on the line trated ‘in Figure 5, but with the piston valve I5 2-2 of Figure 1. turned so that its groove I9 does not register with Figure 3 is a perspective view of the control which: i Figure l is a View in side elevation, illustrating a lluid pressure motor provided with a stroke con conduits I2 and I3, the conduit IIJ will act as an intake, supplying the fluid pressure to the for Figure 4 is a perspective view of the adjusting ward side of the piston 6 for moving it rearwardly lever for the control piston valve. to the position shown by the dotted lines'. Dur Figure 5 is an enlarged view, partly in section ing this stroke the conduit II acts as an outlet. on line 5-5 of Figure 2. By reversing the ñow of the fluid, as indicated Referring in detail to the drawings, the nu 30 by the dotted arrows, the piston 6 will be moved piston valve. meral I indicates a base having a standard 2 on back to its original position, ‘and during this which is mounted a control cylinder 3, Posi stroke the conduit II is the intake and conduit tioned above the control cylinder is a work cyl I0 the outlet. The conduits III and II are con inder ¿I mounted on another standard 5, and hav nected to any preferred type of selector valve. ing therein a power piston 6. The piston B has While the above action is taking place, the the usual piston rod 1 attached thereto, said rod blank or ungrooved portion of the face of the extending through a gland 8 in-one of the cylin piston valve I5 is presented to the lower ends of der heads 9. Leading into opposite ends of the the conduits I2 and I3, thereby, rendering the cylinder 4 are the conduits I0 and I I, respectively. control means inoperative. As long as this blank Also leading from the opposite ends ofthe cyl 40 portion is maintained in the named position, the inder 4 are the outlet conduits l2 and I3, re motor would perform in its usual manner. spectively. Y If, for example, it is desired to utilize one-half The outlet conduits, I2 and I3, communicate of the full stroke of the work piston 6, the handle with the control cylinder 3 intermediate the ends 45 30 should be moved in an arc of 90 degrees, thus of the latter, and movable in cylinder 3 is an giving a one-quarter turn to the piston valve I5 elongated control piston valve I5, having a piston and thereby moving half of the groove I9 out of rod I6 that extends through a gland I1 in one of the path of the conduit I2. In this position, the the heads I8 of cylinder 3. groove I9 will not cooperate with the conduit I2 Control piston valve I5 is longer than the full 50 to release the pressure within the power cylinder stroke of power piston 6, and has a longitudinal 4, until the piston valve I5 has been moved one groove I9 therein that extends diagonally across half its length, at which point the groove I9 and one side of its cylindrical surface. _ , Communicating with opposite ends of the con trol cylinder 3 are outlet conduits 20 and 2|, re the outlet conduit I2 will come into alignment 55 for releasing pressure in the work cylinder 4 3 2,408,795 through the groove I9 and conduit 20 to the stor» age tank or reservoir. As the two piston rods 'I and I6 are connected by the rod 22 they will move in unison, and there fore when the operative point of the groove I9 cooperates with the outlet I2 the work piston B wi11 have moved one-half of its stroke and will stop at this point. It will be seen that the degree of turning of the piston I5 will determine whenthe groove I9 and outlet I2 will register, thereby enabling the operator to control the length of the stroke of the piston 6 to any degree desired. The same operation can be had for movementA of pis ton 6 in the opposite direction, at which time the registration of groove I9 with conduit I3 is con trolled. When the control piston valve has been rotated to the desired position, accidental turning thereof may be avoided by tightening the wing nut 34. By referring t0 Figure 3 the outlet end 50 of groove I9 can be seen as extending all the way to this end of the piston valve I5. The groove I9 does not extend all the way to the opposite end of the piston valve, thus providing the ungrooved end portion 5I which will prevent discharge of the fluid, behind the piston valve I5. Any slight seepage behind piston valve I5 Will be drained by theV conduit 2 I. , Having described the invention, what is claimed as new is: In combination, a double-acting ñuid pres sure motor comprising a power cylinder having a power piston therein, a rod connected to said power piston and extending through one end of said power cylinder, a pipe for the inlet or outlet of pressure fluid at each end of said power cyl inder, and means to vary the stroke of said power piston including a control cylinder, a rotatably adjustable elongated control piston valve recip rocable in said control cylinder, means connect . ing said control piston valve to the power piston for travel therewith in the same direction, said control piston valve having a longitudinal diag onally disposed groove therein, said groove being closed at one end of the control piston valve and open at the other end thereof, exhaust conduits connecting the ends of the power cylinder with the intermediate portion of the control cylinder, and means to rotatably adjust said control piston Valve to` vary the point of registry of the exhaust conduits with said groove, said control cylinder having a vent at one end and a fluid outlet at the other end in constant communication with the open end of said groove. JOHN F. MCGLONE.