US1643560A - Fluid-actuated tool - Google Patents

Description

. V 1,643,560- Sept' 1927 A. H. KATTERJOHN FLUID ACTUATED TOOL Filed June 6, 1922 2 Sheets-Sheet i Patented Sept. 27, 1927.

'usirsn' STATES PATENT OFFICE.

AUGUST H. "KATTERJOHN, OIE DENVER, CGLORADO, ASSIGNOR T0 TI-IE DENVER ROCK DRILL MFG. 00., GE DENVER, COLORAIDG, A COEPOBATION OF DELAWARE.

FLUID-ACTUA'I'ED 'TOOL.

Application filed June 6,

igure is a viewsimila-r to Figure 1, showing the piston at the. extremityot 1 stroke and the parts in a position to deliver live fluid against. one end of the piston,

igure 3 is also a longitudinal sectional view but showing the piston at the. opposite end of its stroke,

Figure is a longitudinal sectional view through a slightly modified form of construction.

Referring first to the embodiment illustrator in Figures 1, 2 and 3, a cylinder mem ber is disclosed having a piston chamber 6 therein. in said piston chamber is a re ciprocatory piston comprising spaced heads 7 and 8 connected by a reduced portion 9 forming an annular channel 10. In one side of the cylinder member is an exhaust-permitting means comprising a central port 11 and other ports 12 onopposite sides of the same, the ports 12 being respectively overrun by the piston heads 7 and 8, as will be clear by reference to Figures 2 and 3.

one side of the cylinder member is a valve chest 13 containing a longitudinally disposed bore 1 forming a valve chamber. The ends o't this chamber are closed by plugs which in the present embodiment are threaded into the ends of the chest 13. The valve chest terminates in a nipple 16, to which may be suitably coupled a conduit leading from source 0t expansible fluid under pressure, preferably air, and the bore 17 of this nipple has communication with ti central portion} of the valve chamber by a port 18. On opposite sides of said port 18 are annular grooves19 with which communicate passageways indicated at 20, which passageways lead to ports 21 that open into the opposite ends of the piston 1922. Serial an. 565,301.

The valve however, may assume opposite extreme positions, as shown in Figures 2 and 3, in which case the grooves 19 are alternately uncovered, thus permitting the sijipply of motive fluid entering the intake 18 to pass alternately to opposite ends of the piston chamber and initiate the opposite movements ot the pistons, as hereinafter described. ln addition there is preferably emoloyed a rick-off port 2 1 that opens directly from the bore 17 of the nipple 16 into one of the grooves 19. V 7 Means are provided for constantly admitting the motive fluid to the opposite faces of the valve heads 23, and this may be conveniently accomplished by ports 25 in said heads. Leading from the ends of the valve chamber and on the outer sides of the valve beans 43 are exhaust passageways 26 that converge and open into the central portion the piston chamber 6 at spaced points ant at a distance apart less than the distance between the pi ton heads 7 and 8. Slidably mounted in' the plugs 15 are nlungers 27, the inner ends of which enter the ends of the valve chamber 1 1 and are adapted to abut against the valve heads 23, as shown in Figure 1. These plungers have outer heads 28 operating in pressure chambers 29, and motive fluid is supplied from the bore 17 to said chambers and against the outer ends of the heads 28 by suitable passageways 30. Relief ports 31 are preferably provided from the chambers 29 on the inner sides of the heads 28, so as to insure inward pressure at all times upon the plungers 27.

Assummg the parts as illustrated in Figure 1, if air or other expansive motive fluid is introduced through the bore 17 of the nipple 16, all the parts of the valve and the plungers have equal pressure against their outer sides, and said valve will remain in the central position illustrated. Air, however, will pass through the kick-01f port 2 1 and thence through the groove 19, the passageway 20 and port 21 into one end of the piston chamber, thus building up suflicient pressure to move the piston 78 to the left. As soon as the head 7 of the piston covers the exhaust passageway 26, the air that has been finding its way through the ports of the. right hand valve head 23 will be stopped and pressure will build up in the right hand end of the valve chamber, thereby moving the valve to the left or to theposition illustrated in Figure 2. When this occurs the left hand groove 19 is in communication with the intake 18 and live will flow through the left hand passageway 20 and left hand port 21 into the left hand end of the piston chamber, thereby operating against the head 8 to drive the piston to the right. During this movement the right hand exhaust'port 12 of the cylinder member is uncovered to permit the exhaust from the right hand end of the piston chamber. As the piston moves to the right it will again reach the position illustrated in Figure 1, uncovering both the exhaust ports 26 and relieving the pressure at the right hand end of the valve 22. The left hand plunger 27, which has been forced rearwardly, as shown in Figure 2, will now react and move the valve to the central position, or until it is stopped by striking the right hand plunger 27. The valve will now be held in its central position with live air out off from both ends of the piston chamber, and consequently the piston will I continue the intermediate or final movement to the right, due to the expansion of the motive fluid held in the left hand end of the piston chamber 6. As the piston approaches the right hand limit of its stroke, the left hand exhaust port 12 will be uncovered and the left hand exhaust passageway 26 from the valve chamber will be covered by the head 8. The valve will therefore reverse its action or move to the position shown in Fig ure 3, whereupon live air will be initially admitted to the right hand end of the piston chamber 6 and the piston will now be driven to the left under live air until. both exhaust passageways 26 are again uncovered, whereupon the valve will be automatically centered and held, until the cycle of operations above set forth again begins.

A slightly modified form of construction is illustrated in Figure l The cylinder member is designated 5 and the piston cha1nber 6 therein contains a reciprocatory piston composed of spaced heads 7 and 8 with a reduced portion 9 between them. The ports 11 and 12 are the same as those described.

The valve chest is designated 13 and is provided with a valve chamber 14 in which operates a valve 22 having all the features of the first described valve. In this structure the plugs 15 instead of being threaded into the ends of the bore forming the valve chamber, are slida-bly fitted therein and are held by a tie bolt 16 that passes through the valve 22 and has upon it tubular plungers 27 Aside from this modification the structure is the same and its operatlon corresponds in all respects to that of the device above described. That is to say, a central intake 18 is employed with the spaced grooves 19 communicating with the opposite ends of the piston chamber 6 through passageways 2O and ports 21. The plungers 27 are moved inwardly by motive fluid supplied to their outer ends through passageways 30 and the heads of the valve 22 are provided with supply ports 25 Exhaust passageways 26 lead from the ends of the valve chamber 1% to the central portion of the piston chamber 6 and are controlled by the piston heads 78.

From the foregoing itis thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art without further description, and it will be understood that various changes in the size, shape, proportion and minor details of con-. struction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

Having thus fully described my invention, what- I claim as new, and desire to secure by Letters Patent, is

1. The combination with a cylinder member having a piston chamber and a piston operating in the piston chamber, of means for supplying actuating fluid to the piston chamber on opposite sides of the piston, a distributing valve controlling said supply and movable between opposite extreme positions and an intermediate position in which latter position it cuts off fluid simultaneously to both sides of the piston, and means for automatically shifting the valve between and temporarily holding it in its extreme positions and in said intermediate position.

2. The combination with a cylinder mei'n ber and a piston movable therein, of means for supplying actuating fluid to the cylinder member on opposite sides of the piston, a distributing valve, means for automatically operating the valve to permit the passage of actuating fluid alternately to opposite sides of the piston as the same reaches the limits of its respective strokes, and means controlled by the piston to automatically move the valve to and temporarily hold it in a position to cut off the actuating fluid from both sides of the piston during the movement of the latter through the intermediate portions of its strokes.

3. The combination with a cylinder member and a piston alternately operating in opposite directions therein, of means for supplying motive fluid to the cylinder member on opposite ends of the piston, an automatic distributing valve movable in opposite lln direct-ions and allowing motive fluid to pass alternately to the ends ofthe piston and correspondingly and simultaneously cutting off the motive fluid to theopposite ends, and means for automatically moving the valve to and temporarily holding it in a position to cut off motive fluid from both ends of the piston during the strokes of said piston.

4. The combination with a cylinder mem her and a piston alternately operating in opposite directions therein, of means for supplying motive fluid to the cylinder memher on one end of the piston' .to effect its working stroke, an automatic distributing valve controlling said motive fluid supply, means for automatically shifting the valve to deliver motive fluid to the piston and to initiate its working stroke, and means for automatically moving the valve to and temporarily holding it in a-position to cut off the motive fluid from the piston during the intermediate portion of the working stroke and maintain the working stroke under expansion of the motive fluid.

5. The combination with a cylinder member and a piston alternately moving in opposite directions therein, of means includ ing two passageways leading to the cylinder on opposite ends of the piston for delivering motive fluid thereto,- an automatic distributing valve movable to alternate'positions to open the passageways alternately and to a third posit-ion to close both passageways, and means for automatically moving the valve to said alternate positions and to: said third position between-the alternate positions and for temporarily holding it in said third position during a material portion 01"? the stroke of the piston. p

6. The combination with a cylinder memher and a piston alternately moving in opposite directions therein, of means including two passageways leading to the cylinder member on opposite ends of the piston for delivering motive fluid thereto, an automatic distributing valve movable to alternate posiher and a piston alternately moving in opposite directions therein, of means including two passageways leading to the cylinder member on opposite ends of the piston for delivering motive fluid thereto, an automatic distributing valve movable to alternate positions to open the passageways alternately and to a third position to close both passage- 7. The combination with a cylinder mom-- ways,fluid actuated means controlled by the piston'for delivering motive fluid to and exhausting it from the valve to shift the valve to said alternate positions, and fluid actuated means controlled by the piston to shift the valve to and temporarily hold it in. said third position during a material portion of the stroke of the piston.

8. The combination with a cylinder memher: and a pistontherein, of a valve chamber the valve in a position over' both outlets 1 during the intermediate portion of the pistons: stroke.

9. The combination with a cylinder mem her and a piston therein, of a valve chamber having an intermediate intake and outlets on opposite sides of the intake leading to the cylinder member on opposite ends of the piston, a distributing valve in the valve chamber movableto alternate positions to alternately open said outlets to the intake, exhaust passageways from the ends of the valve chamber controlled by the piston, plungers operating against opposite ends of the. valves, and motive fluid operating on the plungers to move and temporarily hold the valve in a posit-ion over both outlets during the intermediate portion of the pistons stroke. I

10. The combination with a cylinder member and a piston therein, of avalve chamber having an intermediate intake and outlets on opposite sides of the intake leading tothe cylinder member on opposite ends of the piston, a distributing valve in the valve cham ber movable to alternate positions to alternately open said outlets to the intake, exhaust passageways from the ends of the valve chamber alternately covered and uncovered by the piston and simultaneously uncoveredthereby, and means for moving and temp orarilyholding the valve in a position over both outlets during'the intermedi ate portion of the pistons stroke.

11; The combination with a cylinder memher and a piston therein, of a valve chamber having an intermediate intake and outlets on opposite sides of the intake leading to the cylinder member on opposite ends of the piston, a. distributing valve in the valve chamber movable to alternate positions to alternately open said outlets to the intake, means for supplying motive fluid to the ends of the valve chamber, exhaust passageways from the ends of the valve chamber,

alternately covered and uncovered by the piston and simultaneously uncovered thereby, plungers that operate against the ends of the valves, and means for supplying motive fluid against said plungers simultaneously to cause them to hold the valve temporarily over both outlets during an intermediate portion of the pistons stroke.

12. The combination with a cylinder memher and a reciprocatory piston therein, of a valve chamber having an intermediate motive fluid intake and opposite outlets leading to the ends of the cylinder member, a reciprocatory valve in the valve chamber, means for permitting the presence of motive fluid in the ends of the valve chamber simultaneously, exhaust passageways leading from the ends of the valve chamber to the cylinder member, oppositely disposed plungers operating in the valve, and means for supplying motive fluid to the plungers, said cylinder member having an exhaust port between its ends, and said piston having an intermediate reduced portion that affords communication between the exhaust passageways of the valve chamber and the exhaust ports and forming spaced heads that control said passageways and port, and serving to move the valve between its end positions in the valve chamber, and an intermediate position wherein it cuts ofl motive fluid through both outlets and temporarily holding it in said intermediate position.

18. The combination with a cylinder member having a piston chamber and a piston operating in the piston chamber, of means for supplying actuating fluid to the piston chamber on opposite sides of the piston, a distrib uting valve controlling said supply and movable between opposite extreme positions and an intermediate position in which latter position it cuts off fluid simultaneously to both sides of the piston, opposite reciprocatory plungers mounted independently of the valve and bearing against the opposite ends thereof, means for constantly and yieldingly urging the plungers inwardly and causing both to bear against the valve when it-is in its intermediate position, and means for limiting the inward movements of said plungers to cause each to be alternately separated from the valve when the valve moves to its extreme positions.

14. The combination with a cylinder member having a piston chamber and a piston operating in the piston chamber, of means for supplying actuating fluid to the piston chamber on opposite sides of the piston, a distributing valve controlling said supply and movable between opposite extreme positions and an intermediate position in which latter position it cuts off fluid simultaneously to both sides of the piston, opposite reciprocatory plungers mounted independently of the valve and bearing against the opposite ends thereof, means for constantly urging the plungers inwardly and causing both to bear against the valve when it is in its intermediate position, heads on the outer ends of the plungers and stops against which the heads respectively abut for limiting the inward movements of said plungers and causing each to be alternately separated from the valve when the valve moves to its extreme positions.

15. The combination with a cylinder mem her and a piston operating therein, of a distributing valve for controlling the motive fluid to the cylinder member to operate the piston, a valve chamber containing the valve, means for constantly supplying motive fluid simultaneously to the valve chamber and against opposing portions of the valve, exhaust passages for such fluid from the valve chamber to the cylinder member, said piston having means for alternately closing one and opening the other of the exhaust passages at' each end of its stroke and opening both passages simultaneously at the intermediate portions of its stroke, and oppositely acting yielding plungers that operate on the valve to hold it in an intermediate position and with fluid cut off thereby from the ends of the cylinder member when the exhaustpassages are simultaneously open.

16. The combination with a cylinder member and a piston operating therein, of a distributing valve for controlling the motive fluid to the cylinder member to operate the piston, a valve chamber containing the valve, means for supplying motive fluid simultaneously to both ends of the valve chamber and against opposing faces of the valve, exhaust passages from the ends of the valve chamber opening into the central portion of the cylinder member at spaced points and alternately uncovered by the ends of the piston during its reciprocation, said cylinder member having exhaust permitting means that is open to the alternately uncovered passages and said piston having a groove that simultaneously uncovers both of said. passages and opens them to the exhaust-permitting means, and oppo sitely acting yielding plungers that operate on the valve to hold it in an intermediate position and with fluid cut off thereby from the ends of the cylinder members when the exhaust passages are simultaneously open.

In testimony whereof, I aflix my signature.

' AUGUST H. KATTERJOHN.

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