US2428726A - Fluid reversing valve arrangement for rotary tool motors of the vane type - Google Patents

Description

Get. 7, 1947., J STURROCK 2,428,726 FLUID REVERSING VALVE ARRANGEMENT FOR ROTARY TOOL MOTORS OF THE VANE TYPE Filed July 14, 1944 2 Sheets-Sheet l INVENTOR.

Oct. 7, 1947. J. STURROCK 2,428,726

FLUID REVERSING VALVE ARRANGEMENT FOR ROTARY TOOL MOTORS OF THE VANE TYPE Filed July 14, 1944 2 Sheets-Sheet 2 BY Wq' wherein the difierential versing valve mechanism,

Patented Oct. 7, 1947 PATENT. orrica FLUID FOR ROTARY VANE TYPE James Sturrock, Cleveland Heights,

or to The Rotor Tool Company,

of Ohio Application July 14, 1944, Serial No.

1 2 Claims. My invention relates in general to rotary reversible motors and more particularly to fluid reversing valve mechanismsand the fluid pas-' power motors, now Patent No. 2,373,669, issued April 17, 1945.

An object of my invention is the provision of a fluid reversing valve mechanism which may be incorporated in a vane type motor whereby the fluid reversing valve mechanism may be selectively operated to either one of two positions for reversing the direction of rotation of the fluid motor, said fluid reversing valve mechanism being operated in sequence to the operation of a manually operated valve means controlled by the handle of the fluid motor.

Another object of my invention is the provision of a fluid reversing valve mechanism arranged to be selectively actuated to either one of two positions for changing the direction of rotation of the fluid motor, said fluid reversing valve mechanism being governed by differential pressure pressure is controlled by a manually operated valve means governed by the handle of the fluid motor.

Other objects and a fuller understanding of my invention may be had by referring to the following description and claims, taken in conjunction with the accompanying drawing, in which: f

Figure 1 is alongitudinal cross-sectional view of a vane type motor embodying the features of my invention, and showing principally the rethe fluid passages to and from the valve and through handle, and attendant parts;

Figure 2 is a cross-sectional view taken along the line 2-2 of Figure 1;

Figure 31s a cross-sectional view taken along the line 3--3 of Figure l; 1

Figure 4 shows a side elevational view of the fluid operated valve part; Figure 5 is an end view of Figure 4; and

Figure 6 .is a diagrammatic view illustrating the fluid reversing valve mechanism, the fluid passages to and from the valve and through the motor.

' With reference the. drawing, I have illusthe motor, the

REVERSING VALVE ARRANGEMENT TOOL MOTORS OF- THE,

Ohio, assigna. corporation trated my fluid reversing valve mechanism in conjunction with a vane type fluid motor comprising a housing ID, a rotor ll arranged to rotate in a rotor bore l2 of the housing. As 5 illustrated, the rotor H is provided with a rality oi radially 'slidable vanes l3 which engage the rotor bore l2 at their outer ends. The rotor ll may be supported by bearings l4 and I5 suitably mounted in the housing Ill. The lower end of the housing in Figure 1 is provided with a gear compartment It in which are mounted a plurality of gears for driving the output shaft l'i. 'The fluid pressure for operating the motor may be supplied through a supply hose 20 attached to the end of the handle 22 of the motor unit. Mounted within the handle 22 is a. valve 2! actuated by the turning of they handle from a neutral position. The dotted line 23 which ingo terconnects the valve 2| to the handle 22 indicates that the valve is actuated by the handle 22. The fluid after passing through the valve 2|. flows through a duct 24 provided in the lefthand end of the handle, a duct 25 provided in the bodyloi the motor housing, a duct 25 provided in the end cover of the motor housing and then into the central opening of a governor 2'l,.where the flow of thefluid is governed as it flows radially outward through the governor openings 28 into the governor chamber 33.

rate at which the fluid may flow radially outwardly through the governor openings 28 into the governor chambers 33 is controlled by a reciprocally and slidably mounted governor sleeve 35 30 which moves relative to the governor openlugs 28 under the influence of pivotally mounted governor weights '29. When the speed of the fluid motor exceeds a predetermined value the governor sleeve 30 blanks the governor openings 28 and thereby reduces the speed of the rotor, whereupon the openings 28 are again opened. The fluid after entering the governor chamber flows through a duct 3| to a'fluid feed chamber 32 where the fluid is then selectively controlled by a fluid operated valve 55 for determining the direction of rotation of the rotor.

Extending from the fluid feed chamber 32 are two feed ducts 34 and 51 which selectively direct fluid to the rotor bore under the control of the fluid operated valve 55. The fluid in the feed duct 34 flows through a feed port 36 into the rotor bore and the fluid in the duct 51 news through a feed port 53 into the rotor bore. In the position shown in Figures 3 and 6, fluid under pressure 55 enters the feed duct 34, flows through the port plu- The

fluid operated valve 55 is operated by diflerential' pressure governed by a manually operated valve 38 which in turn isactuated by the handle 22 of the motor unit. The manually operated valve 33 is of the rotary type and comprises a. hollow valve core 39 rotatively mounted in a valve bore 40. The central opening 4i of the hollow valve core 39 is connected to atmosphere. Provided in the valve bore 49 are three annularly spaced valve openings 42, 43 and 44 and provided in the hollow valve core 39 are two annularly spaced valve openings 45 and 46. In the position shown in the drawings, see Figures 2 and 6, the valve openings 43 and 46 are in register and the valve openings 44 and 45 are in register. Extending from the valve opening 42 of the manually operated valve 38 is a passageway 31 which communicates with the feed duct 34 and extending from the valve opening 43 of the manually operated valve 38 is a fluid passageway 54 which communicates with the feed duct 51. The feed duct 34 and the fluid passageway 31 constitute a fluid passage extending from the fluid feed chamber 32 and the manually operated valve 33. Similarly, the feed duct 51 and the fluid passageway 54 constitute a second fluid passage extending from the fluid feed chamber 32 to the manually operated valve 38. p e

The fluid operated valve 55 is pivotally mounted at each end thereof upon pivot pins 56 and is actuated in sequence to the operation of the manuallyoperated valve means 38 which is controlled by the turning of the handle 22. The manually operated valve 38 may be actuated by the handle in any suitable means, and as illustrated in Figures 1 and 6 the handle is provided with an external gear 50 which meshes with a gear pinion 49 connected to the hollow valve core 39 which rotates within the valve bore 40. Upon the actuation or turning of the handle in one direction the valve 2| is open for admitting fluid to flow to the fluid feed chamber 32 and at the same time the hollow valve core 39 is actuated to vent the fluid passageway 54 t atmosphere,

whereby through the action f differential pressure the fluid operated valve 55 is actuated to close the feed duct 51 and to open the feed duct 34. Upon the actuation of the handle 22 in the opposite direction, from its neutral position, the valve 2| is again open to admit fluid to the fluid feed chamber 32 and at the same time the manually operated valve 33 is actuated to vent the fluid passageway 31 to atmosphere, whereby the djferential pressure actuates the fluid operated valve 55 in the opposite direction to close the feed duct 34 and to open the feed duct 51. In

the neutral position of the handle 22 the valve 2| is closed. When the fluid passageway 54 is vented to atmosphere the hollow valve core 39 is in the position as that shown in Figures 2 and 6 of the drawing, and when the fluid passageway 31 is vented to atmosphere the hollow valve core 39 is moved in such position that the valve opening 45 registers with the valve opening 42 and the valve opening 46 registers with the valve opening 44. Under the influence of diiferential pressure, the fluid operated valve 55 acts sequentially to the operation of the manually operated valve 38, whereby the fluid operated valve 55 may be operated to eitherone of two positions for reversin the direction of rotation of .the rotor upon the turning of the handle 22 from its neutral position. It is to be noted that the fluid passageways 31 and. 54 when they are respectively connected to atmosphere, constitute an exhaust passage for the fluid motor to relieve back pressure. The fluid passageway which is connected to atmosphere functions as an auxiliary exhaust which exhausts that portion of the air which is not exhausted out through the exhaust port 5|. In other words, the air which is entrapped between successive vanes after; the trailing vane has passed the exhaust port 5! is caused to exhaust out through either one of the two passages 31 and 54 depending upon which one is open t atmosphere and thereby relieve any back pressure which would otherwise exist by reason of the fact that all of the air had not been exhausted out of the exhaust port il. Therefore, my invention. in addition to functioning as a selectorvalve, also functions to provide an auxiliary exhaust to relieve back pressure within the motor and thereby improve the efliciency of the fluid motor.

Although I have described my invention with a certain degree of particularity, it is to be understood that the present disclosure has been made only by way of example, and that numerous changes in'the details of construction and the combination and arrangement of parts may be resorted to without departing from the spirit and scope-of the invention as hereinafter claimed.

I claim as my invention: I

1. In a rotary reversible'motor driven by motive fluid, the combination of a motor housing having a bore and a rotor mounted in said bore, said rotor having .slidably mounted vanes engaging said bore, said housing having a first fluid passage with a fluid entrance end and a fluid exit end having a second fluid passage with a fluid entrance end and a fluid exit end, a'flrst feedport interconnecting the bore with the first passage intermediate the entrance and exit ends thereof, a second feed port interconnecting the bore with the second passage intermediate the entrance and exit ends thereof, said motor housing having an exhaust port communicating with said bore intermediate said flrst and second feed ports, manually operated valve means arranged to be selectively actuated to either one of two positions, and fluid operated valve means acting sequentially to the operation of the manually operated'valve of the second passage to motive fluid, whereby motive fluid is directed to the rotor. bore through the second feed port to drive the rotor in one direction with the motive fluid exhausting through the exhaust port, and said manually operated valve means in the otherposition closing the exit end of the first passage and opening the exit end of the second passage to atmosphere and said fluid actuated valvesequentially closing the entrance end of the second passage and opening the ing said bore, said housing having a first fluid passage with a fluid entrance end and a fluid exit end, and having a second fluid passage with a fluid entrance end and a fluid exit end, a first port interconnecting the bore with the first passage intermediate the entrance and exit ends thereof, a second port interconnecting the bore with the second passage intermediate the entrance and exit ends thereof, said motor housing having an exhaust port communicating with said bore intermediate said first and second ports,-

manuallyoperated valve means having first and second valves adapted to pen and close the first and second .fiuid passage exits. and fluid operated valve means acting sequentially to the operation or the manually operated valve means and arranged to be actuated by the motive fluid to either one oi two positions, said first valve in its open position opening the exit end or the first i'eed passageto atmosphere and said second valve in its closed position closing the exit end of the second passage, and said fluid operated valve means sequentially closing the entrance end of t the first passage and opening the entrance end or the second passage to motive fluid. whereby motive fiuid is directed to the rotor bore through thesecondieedporttodrivetherotorinone direction with the motive fluid exhausting through 1 the exhaust port, said first feed passage with its exit end open to atmosphere serving as an auxiliary exhaust to relieve back pressure within the motor to exhaust entrapped air-between adjacent vanes after the vanes have passed the exhaust port. and said second valve in its opened position opening the exit. end oi the second passage to atmosphere, and said first valve in its closed position closing the exit end or the first passage to atmosphere, and said fluid actuated valve sequentially closing the entrance end or the second passage and opening the entrance end of the first P e to motive'fiuid,v whereby motive fiuid is directed to the rotor bore through the first feed port to drive the rotor in the opposite direction with the motive fluid exhausting through the exhaust port, said second reed passage with its exit end open to atmosphere serving as an auxiliary exhaust to relieve back pressure within the motor to exhaust entrapped air between adjacent vanes after the vanes have passed the'exhaust Jams s'runaocx.

REFERENCE CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 819,470 Taylor May 1, 1906 1,338,782 Jimerson May 4, 1920 1,374,923 Rathburn Apr. 12, 1921 1,952,806 Hyland Mar. 2'7, 1984 1,999,389 7 Norling Apr. 30, 1935 ZM'UISQ- Amtsherg -1 Apr. 20, 1937 2,261,204

Amtsberg Nov. 4, 1941

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