US1988749A - Fluid pressure distributing means - Google Patents

Description

Jan. 22, 1935. M. RESWICK 1,988,749

FLUID PRESSURE DISTRIBUTING MEANS Filed March 51, 1950 2 Sheets-Sheet l sa a 54 5a 1/! .54 {1/ i 5a 0 ya 4 5a 5/ 50 44" Mdzuv'ce fieszw'm? INVENTOR ATTORNEY Jan. 22, 1935. M. RESWICK FLUID PRESSURE DISTRIBUTING MEANS Filed March 31, 1930 2 Sheets-Sheet 2 ATTORNEY Patented Jan. 22, 1935 1 ,988,749 FLUID PRESSURE DIs rnmU'ri'nc Maurice Re'swick, Ellwood City," P assignor' -to Penola Inc.', a corporation of Delaware:

Application March 31, 1950, Serial No. 440,533"; p Claims.- 01. 121-147 This invention relatesto improvements in fluid which housesa. low: speed gearing...(not shown). pressure actuated means having a time interval Upon the shaft 3 of the motor]. thereis mounta regulaton eda conical pulley :4 having three belt grooves It is an object of this'invention toprovide one indicated .o'ne bythe; numeralfi, another by the 5 or more fluid pressure operated motors having a numeraldand the third by. the numeral '1, the 5 large range of control of operation. 1 portionnf the pulley in yvhichthe groove 5 .is

This invention is a continuation in. part. of my formed being of'igreater diameter than-the. por co-pending application filed. November 26, 1928, tion in whichfthe groove 6 isz'formedandthe Serial No. 322,006. latter eportion being of greater; diameter than This invention also consistsin certainother theportion in which-the groovev 7 is formed. l0- features of construction and in the combination A belt 8 'isztrainediover thepuliey 4 in any one and arrangement of the several parts, to be hereof the grooves thereof and over. a pulley 9 which inafter fully described, illustrated in the accomis similartothe'pulley 4 except that its. grooves panying drawings, and specifically pointed out which correspondfto.thegrooves-fi, 6"and'7: of

' in the appended claims, it being understood of the pulley 4 are indicated by the numerals .10, 15; course that minor changes may be made so long 1'1 and 12Jrespectively.n :2: as they fall within the scope-of the claims. The pulley Q-is mounted uponza shaft 13 which In describing my invention in detail, referis journalled in one side of uthergear casing .2 once will be had to the accompanying drawings, and oonstitutesa part of thelow speed gearing;-

wherein like characters denote like or correwithin this casing," and, by the gearing system, 20 sponding parts throughout the several views, and rotary motion is imparted to a shaft 14 joure in which:-- nailed in. the opposite side of-the casing2, when Figure l is a view. in side elevation illustrating the motor is inoperation. a part of the apparatus embodying the inven- The control va1ve,.l which constitutesone of tion. the principal featuresof the present invention, 25

Figure 2 is a view in front elevation illustratis indicated-in. general by the numeral 15 and ing the control valve of the apparatus. this valve comprises a. casing 16 which is in-,; V Figure 3 is a View in elevation of the control tegral with a supporting base 17, and thesaid valve casing head. I casing is of the conical form shown most clearly Figured is a view illustrating the body of in Figure '6 of itheidrawings. At its iorwa'rd 30.

the control valve casing. I side, the casing is of cylindrical form asinrlh Figure 5 is a similar view illustrating the rocated bythe numeral. :18, soasto accommodate tary member of the valve. the rotary memberof the control valve which Figure 6 is .a vertical front to rear sectional indicated by the numeral), anda. head 200i View through the valve on the line66 of Figsubstantially circular form isrsecnred by. bolts 35'. ure 2, looking in the direction indicated by'the 2110 the S flp fi the casingflfiarrows. valve body 19 is formed centrally inxits facewhich Figure 7 is a diametric sectional View taken is presented to the headzZO; with & t' y 'fl substantially on the line 7.7 of Figure 5 look-- socket 22'into which'is fittedthe end of "the 40 ing in the direction. indicated by the arrows; shaft 14 which is also of p01y CIQ'SS 40 Figure 8 is a similar View on the line8-8 of section, altho dfisii'ed, this polygflnal p Figure 3 looking in the direction indicated by 14 y Separate from-the haft the arrows. and connected therewith inany suitable manner; Figure 9 is a vertical sectional view through The valve head .19 is-formed in itsifacein which the motor. the socket 22 is formed, with a substantially 45 Fi r 10 i view partly in el tion and cylindrical reoe'ss'24'having branches 25 .extendpartly in section illustrating *a modification of mg fmm y-'flpp t d eof a d the invention as regardsthe piping or connecterminatin in 116085585 -Anfl1i0uate7refi8s$ tion of the outlet ports of the air valve to the 7 is a firmed-mime S M06015 t Valve ports of the double-acting air cylinder of'the' body 19 and a port 28 is formed through the 50 expansible chamber motor. body and. communicates atone end with this In the drawings and more particularly in Fig recess a d: pens a t other end thmugh e ure 1 thereof, the numeral 1 indicates inflgenother face of the valve body and is therefore. eral an electric motor, and the numeral 2 a in communicationqvith the interior of the valve casing upon which the motor is supported and casing 16.. 1.. 1

A spiral spring 29 is arranged within the easing 16 and bears at its major end against the inner face of the head 19 and at its minor end against a bearing ball 30 which is seated in the apex of the valve casing 16, it being understood that, through the medium of this spring, the valve body 19 is held against the inner side of the casing head 20. The said head 20 is, as shownin Figures 3 and 8 of the'drawings, provided with two pairs of ports indicated by the numeral 31 which are chordal to the axis of the head and located at diametrically opposite sides of said axis and the inner ends of these ports are provided with branches '32 which open through the inner face of the head 20 and with diametrically opposite ones of which the recesses 26 are to be brought into registration in rotation of the valve body 19.

At this point it may be stated that the recess 24 and its branches 25 and the recesses 26, constitute a by-pass in a manner which will pres-' ently be explained. i

The valve casingl6 is formed in its conical portion with an inlet port 33 and a compressed air supply pipe 34 is placed in communication with this port and is provided with a manually operable cut-ofi valve 35 and also a priming .valve 36 so that, by adjustment of the first mentioned valve, the supply of compressedair to the valve casing 16 maybe controlled, and by opening of the valve 36, a suflicient quantity of lubricant may be pouredinto. itand'hence delivered to the casing 16 to lubricate the .valve, at the time of initially starting the operation of. the apparatus. i

The expansible chamberrnotor heretofore referred to is indicated in general by the numeral 37 and comprises a cylinder. 38, which is closed at its upper end by a head 39 having an axial bore 40 therein accommodating astem 41 which extends upwardly from the rod 42 of the piston. The stem 41 indicates the position of the piston. A stufling box 44 is provided upon the head 39 at the upper end of the bore .46 so as to prevent the escape of compressed air past the portion 41 of the rod 42. .The piston head comprises a collar 45 which is fitted to another reduced portion 46 of the, upper endof the piston rod42.

The portion 46 is threadedand a collar 43 is adjustably fitted onto the threaded portion of the piston rod and bears against the upper side of one member. 49 of the piston head, the other member; of said. head, indicated by the numeral 50, beingheldagainst. theupper side; of the collar 45 .and a disk 51'of 'metal being interposed between the; head members 49 and 50. and fitting the reducedportion 46 of the piston rod. The head members 49' and are of some yieldable material as for example rubber or leather and are of a diameter to fit snugly in the cylinder 38 so that there can be no leakage of air past the piston head, and the employment of piston rings for this purpose is obviated. The head 39 of the cylinder is formed in its under side with a .recess 52 and a port 53 is formed in the head and communicated with the said recess and also is extended laterally at its upper end and threaded to accommodate one end of an air conducting pipe 54.

' Another port 55 ,is'formed in the lower end of the cylinder and an, air conducting pipe 56 leads from this port.

The pipe 54, as shown in Figurei2, is connected the by a branch 57 with one of the upperports 31 at one side of the valve casing and, by another branch 58, with the lower port 31 at the other side of the valve casing. The pipe 56 is, in like manner, connected to the lower port 31 at the first mentioned side of the valve casing and, by a branch 59, with the upper port 31 at the last mentioned side of the valve casing. It will be understood, at this point, that the pipes 54 and 56 are in communication with diametrically opposite ones of the ports 31 and that when the valve head 19 is in position with its recess 24 and branches 25 and end recesses 26 in alinementwith any two diametrically opposite ones of the ports 31, the intake port 28 and the recess 27 ,will register with one of the other two diametrically opposite ports 31, and air will be delivered to the respective one of the pipes 54 and 56 and that, as the valve rotates, the said pipes will be alternately supplied with air. Likewise, as the valve head rotates, the intake port 28 will be successively brought into communication with the ports 31, so that the air which is back of each piston head, as the head is moved on its delivery stroke by the pressure of the air admitted to the cylinder, at the otherside of the piston head, will be discharged, by way of the recess 24, and an opening 68 in the head 20, and through the pipe connected with the diametrically opposite port.

The supply of air through the pipes 58 and 59 may be regulated, in this embodiment of the invention, by the adjustment of needle valves 60 and 61 which are interposed in the pipes 58 and 59, respectively. When needle valves 60 and 61 open the compressed air will be delivered to each of the four ports in valve head 20 and the motor will be operated twice during a complete revolution of the rotary valve body 19. When the needle valves 60 and 61 are closed the ports to which the branches 58 and 59 are connected'become inoperative leaving only two ports effective so that the motor will be operated only once during a complete revolution of the rotary valve body 19.

Figure 10 of the drawings illustrates an embodiment of the invention wherein the employment of the valves 60 and 61 may be dispensed with, and in this figure, parts which correspond to those shown in the preceding figure, are indicated by the same reference numerals, primed. It will be observed, by reference to this figure that the motors 37' are located above and at opposite sides of the control valve 15' and the inner or relatively adjacent ends of the pipes 54 and 56' are connected to the ports or check valves 62 and 63 respectively. An air conducting pipe 64 extends downwardly from one of the pipes 54, between the ends thereof and is placed in communication at its lower end, with one of. the lower ports 31' in the head of the valve 15.

From theforegoing description of this embodiment of the invention it will be understood that when the port 28' of the valve body is brought into communication with one of the ports 31', as for example, the one with which the pipe 64 is connected, air under pressure will be admitted to said pipe and, the piston 43 and check valve 62 being in the positions shown in Figure 10, the air will act against the piston to move the same downwardly, and as the exhaust recess 24' is, at this time in position in communication with the ports 31, to which the pipes 65 and 67 are connected, and the check valve 62 being. closed, the downward movement of .the

(ill

piston, at the corresponding side of the valve, will result in the air, below the piston, being delivered through the pipe 65, past therecess 24' and through the pipe 67 to the cylinder at the opposite side of the valve, below the piston therein, and this same cycle of operation will take place as the supply port 28' registers with successive ones of the ports 31', it being understood that the pistons in the cylinder at that side of the control valve in the direction in which the check valves open, will be operated twice to each cycle of operation of the pistons in the cylinders at the opposite side ofthe control valve. A pipe 65 is in communication at its upper end with that one of the pipes 56 which is below the first mentioned one of the pipes 54 and at its lower end is in communication with the respective upper port 31. Another compressed air conducting pipe 66 is in communication at its upper end with the other one'of the pipes 54' and at its lower end is in communication with, the other one of the ports 31' at the other side of the valve, and a pipe 67 is in communication with the other pipe 56' and at its lower end is in communication with the other lower port 31'.

While in the above description of my invention the air valve is primarily intended for the operation of the motor units of a lubricating system similar to the one described in my copending application, Serial No. 322,006, I do not wish to be limited to this application of the invention only. It is quite obvious that the described air valve may be used for the automatic operation of pneumatic, steam, hydraulic and other machinery actuated by fluid pressure, such as air cylinders in general, lifting devices, etc., especially where the rate of speed is to be controlled and where it is desirable to operate two or more batteries or cylinders or similar devices at different rates of speed with a single controlling mechanism, automatically from a common source of fluid pressure.

What I claim is:-

1. In a compressed air actuating means, a motor comprising a cylinder having ports in its upper and lower ends, and a piston working in said cylinder, a control valve for controlling the supply of air to said cylinder, the said valve comprising a casing and a valve body rotatable therein, the casing having ports arranged in equidistantly spaced relation to the axis of rotation of the valve body and at diametrically opposite sides of said axis, the valve body having an inlet port, positioned for successive registration with the ports of the casing, and an outlet port for registration with diametrically opposite ones of the casing ports, pipes establishing communication between the ports at each end of the cylinder and diametrically opposite ones of the casing ports and valve means in the pipes between the diametrically opposite casing ports whereby communication of one port of each group of diametrically opposite ports with the cylinder can be closed.

2. In a compressed air actuating means, a motor comprising a cylinder having ports in its upper and lower ends, and a piston working in said cylinder, a control valve for controlling the supply of air to said cylinder, the said valve comprising a casing and a valve body rotatable therein, the casing having ports arranged in equi-distantly spaced relation to the axis of rotation of the valve body and at diametrically opposite sides of said axis, the valve body having an inlet port, positioned for successive registration with the ports of the casing, and an outlet port for registration with diametrically opposite ones of the casing ports, pipes establishing communication between the ports at each end of the cylinder and diametrically opposite ones of the casing ports, simultaneously with registration of the inlet port with one of the said casing ports intermediate the said diametrically opposite ones of the casing ports and valve means in the pipes between the diametrically opposite casing ports whereby communication of one port of each group of diametrically opposite ports with the cylinder can be closed.

3. In a compressed air actuating means, a motor comprising a cylinder having ports in its upper and lower ends, and a piston working in said cylinder, a control valve for controlling the supply of air to said cylinder, the said valve comprising a casing and a valve body rotatable therein, the casing having ports arranged in equi-distantly spaced relation to the axis of rotation of the valve body and at diametrically opposite sides of said axis, the valve body having an inlet port, positioned for successive registration with the ports of the casing, and, a diametr'ic outlet port for registration with diametrically opposite ones of the casing ports, pipes establishing communication between the ports at each end of the cylinder and diametrically opposite ones of the casing ports, the inlet port being located the same distance from the axis of rotation of the head as the ends of the outlet port and valve means in the pipes between the diametrically opposite casing ports whereby communication of one port of each group of diametrically opposite ports withthe cylinder can be closed.

4. In a fluid pressure impulse system, a fluid actuated motor including a piston operating in a cylinder, a control valve for the motor including a casing having a head, an inlet for fluid under pressure opening into the casing, a valve body rotatable within the casing between the inlet and head, the casinghead having four ports arranged in equi-distantly spaced relation to the axis of rotation of the valve body, a discharge outlet in the casinghead, means connecting the ports alternately with opposite ends of the cylinder, an inlet port in the valve body opening through the body for effecting successive communication of the inlet with the ports of the casinghead, an outlet port in the valve body for effecting successive communication to alternate pairs of ports of the casinghead with the outlet and valves cutting ofi communication of adjoining casinghead ports with the cylinder.

5. In a fluid pressure impulse system, a fluid actuated motor including a piston operating in a cylinder, a control valve for the motor including a casing having four delivery ports, means for effecting successive delivery of fluid through the ports, means for injecting the delivered fluid from successively operated ports alternately into opposite ends of the cylinder and means for cutting off delivery of fluid through two successive ports.

MAURICE RESWICK.

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