US1652857A - Valve-seat puller - Google Patents

Description

Dec. 13, 1927. 1,652,857 E. E. GREVE v VALVE SEAT FULLER Filed m 7. 1925' IN V EN TOR.

ATTORNEY.

v Patented Dec. 1 ,1 27 I v UNITED STATES P'ATE T OFFICE.

EDGAR E. GBEVE, OF BELLEVUE, PENNSYLVANIA.

vnnvn-sna'r ruLLER.

Application filed July 7301925., Serial N0. 41,962.

This invention is fora device for removing valve seats from pumps, particularly pumps used in the oil fields, and for similar operations. In designing a pump, particularly one for use in an oil field, a valve seat is generally slight, and as they usually have to be forced into place, it is exceptionally hard to remove them after they have been in place for a long time, and it"becomes desirable to re place them.

The present invention has for its'princi pal object, to provide a device for remov' 2 ing such seat rings and for performinglike operations.

Further important objects of the invention are to provide a tool for this purpose which is of simple construction and which mayv be easily manipulated. These and other objects and advantages are attained by my invention, the nature of which may be more readily understood by reference to the accompanying drawings,

. illustrating a preferred embodiment thereof.

' In the drawings:

Fig. 1 represents aside elevation of the tool showing it in lifting engagement with a seat'ring,the ring being shown in section;

Fig. 2 shows the lower end of the puller entering into engagement with the ring, the ring being shown in section;

Fig. 3 is a view similar to Fig. 2, showing the hooks passing through the ring; andof Fig. 1.

'In the drawings, 1 represents a suitable cross-bar through the center of which is slidably passed the threaded upper end of a mandrel 2. Above the cross-bar on the threaded upper end of the mandrel is an operating nut 3, by means of-which the mandrel may be raised or lowered with respect to the cross-bar when the cross-Bar is stationary.

The lower portion of the mandrel, below the threaded area thereof, is squared, as in 'dicated at 4, and below the squared portion the mandrel is flared. to rovide oppositely inolined'faces 5 terminating at their lower ends in lips or shoulders 6. I

-vide'the pivotal suspension for these Fig. 4 isa transverse section on line 4-4.

. this. time the bottoms of the dogs are on the eld Slidably fitted over the squared portion 4 of theshank is a transverse adjusting piece or bar 7 having laterally projecting ends or limit lugs 8 extended to a length greater than the inner diameter of an article to which the device is applied for use, thereby providing a' seat or stop for positioning, the

- device.

Straddling the adjusting piece at each side thereof, are thebifurcated upper end portions 9 of pivoting dogs 9, pins 10 being passed through portions 9" of the respective dogs and through the adjusting piece to re- 0 s. The inner faces of dogs 9 are constructed so as to' provide largecontacting surfaces with the inclined faces 5 of, the mandrel. The lower endof' each of the dogs terminates in a lip or ledge 9 The under faces of the dogs are preferably rounded, as indicated at y .9, and they are so balanced that they have a tendency to swing in toward each other whenhanging free. of the tapered faces 5 of the mandrel.

In operation, the tool is lowered through v the seat indicated'in the drawing as A. The

bottoms of the dogs, which are at this time expanded by the mandrel, hit the top of the seat while the mandrel continues to move down through the seat/ This is shown in Fig. 2. -When the mandrelhas moved suf-' ficiently far down throughthe-seat, the dogs move'together and drop down throu h the seat, as shown in Fig. 3, until the en s 8 of piece 7 rest on the top of the seat ring. The

mandrel is then lifted to move the dogs away fromeach other, forcing the ledges or lips 9" under the valve seat. until further outward movement is limited by reason of the ledge formation, as best shown in Fig. 1. At

lips or shoulders 6.

AtB is designated a suitable fixed support on which the cross-bar 1 rests to hold it'stationary. By turning nut 3, the mandrel may be gradually raised, lifting the valve seat out of the seat-ring recess of the pump, not shown. r I

It will be observed that during the operation of pulling'the valve seat, the spreading movement of the dogs is definitely limited by the shoulders of the lips 9" that hook .under the seat ring. The relativeimovement of the mandrel with res set to the dogs is also definitely restricted y the pro- I VlSIOIFOff-lIQ flMlgGS or lips 6'wh ichprefer- Irowit] the'lower ends ofthe dogs. v

-While I have'described andillustrated-a preferred embodiment of'my invention, it.

8 will be understood that various changes and modifications are to be contemplated the spirit thereoi. I claim as my invention:

1. A toolof the class described including an operating mandrel having a threade portion, a tapered end portion having a pair of oppositelv inclined faces thereon and. a non-circular intermediate portion, an adjusting bar slidably mounted on the mandrel and having anon-circular bore, a pair of 'do 5 pivotall hung from the adjusting bar and arrange so that each of the dogs coogfrates with one of the said inclined faces w ereby a large contact area :is provided therebetween, said dogs each provided with a" lifting member thereon to engage avalve seat, said adjusting bar having a length greater than the diameters of the valve seat toenga'ge the top surface thereof.

2. Atool of thei cllalsls described imluding an operating man re aving a airo op sitelj inclined 'faces thereon, 11 adjustgg T' bar fslidable on-the mandrel above the inclined faces thereof,a pair of dogs piv-' otally hung from thead usting bar so that each" of them cooperates with one of the" inclined faces of the mandrel whereby a large contact area is provided, each of said do having a lifting edge thereon to engage t5: under side-of a' 'va ve sea-t, said adjusting bar, having projecting end portions thereon extended to'a length greater than the diam eter of a valve seat and adapted toengage the top surface thereof, and means for-moving the mandrel. v a I 40 In testimony whereof I aflix m si ature'

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