US1703201A - Polish-rod grip - Google Patents

Description

I Fen-2,6, '19291y 1,703,201

' HQ A. MELAT POLISH Ron GRIP Filmy Nov. 13, 1924 HEHRYAMELAT Patented Feb. as, l1929.

PATENT `ol-jl-lc-E..

H ENnY `aannam, or rom: WORTH, TEXAS.

roLIsH-noo GRIP.

' .Application led November 13, 1924. lSerial No. 749,786.

M y invention relates to polish rod -grips for use in pumping operations;`fand the object isto provide a simple gripping device which will act with certainty andwhich will not become detached or loose in operation and which hasa tendencyto become tighter on the polish rod during operation. Another object and advantage is that the device is easily and readily installed and detached and the two parts will remain assembled when detached. Other objects and vadvantages will be fully explained in the following description, and the invention will be more particularly pointed out in the claims. n

Reference is had to the accompanying drawings which forni a part of this application. 'c

Fig. 1 is an elevation, showing the grip assembled and engaging 'a polish rod. Fig.. 2`is an enlarged plan view ofthe gripping members.` Fig. 3ds a front elevation-of the i same. Fig. 4 is a perspective elevation. Fig.

.5 is a perspective view of the gripping members, showing 'the relative position ofthe polish rod. i v

Similarcharacters'of referenceare used to indicate the same parts throughout the several views. f ,4 v

lThe improved grip has a body member or shoe 1 provided with a vertical opening 2 for the' wedge or `clamp 3 and the opening 2 is^ tapered from the upper end downwardly, corresponding to the taper-dof the wedge 3; The wedge 3 is concavo-convex lin form, the concave side engaging the polish rod 4. The body member or shoe 1 has afslot 5 in the front side to receive the polishrod 4, this slot 5 opening into the vertical opening 2. The wedge 3 has a head 6 for convenience in installing and detaching the grip. The wedge may be driven downwardly for clamping the polish rod/4 by hammering on top of. 'the head and it may be driven upwardly for detaching the wedge from the polish rod by hammering on the underside of the projecting head. The wedge will not become loose inioperation because the tendency of the wedge is to become rmore firmly pressed against the polish rod.

The grip is providedwith a body having sockets 7 for the pumpingcable 8. These sockets are relatively of large diameter at the bottom and taper upwardly,fas shown in Figs. 2 and 3. By such construction, the ropeor cable will not become detached from the body or shoe because the tendency will be to make rope tighter in the sockets. i Fig. 1 illustrates the several parts in action. The cable 8 extends upwardly and is looped over the Walking beam 9 for action. The polish rod 4.- is shown extending down into the pump and casing head.

`When the grip is not in use, the Wedge will not fall out of the shoe 1 because the wedge is wider than the slot 5fand the head 6 will not pass down through the shoe because the head will be caught on the shoulders 10. The grip' can be readilyadjusted on the polish rod at any vrequired height by loosening the wedgeand then moving the grip-to the required position and then tightening the wedge.

1. A polish rod grip comprising a body memberhaving a vertical .opening there-1 through tapered on one side and curved con-y cave on'opposite sides and one side engaging the polish rod, a wedge iaving concave-convex surfaces correspon ing to the convex surfacewf the rod and the concave surface of-said body member and \a tapered surfacel wedge projecting laterally beyond the vertical surface of said body andserving as `a means foradjusting said wedge.

2. A polish rod grip and .cable iholder comprisinga body member having a vertical opening concave on opposite sides and one of 'said concave sides being tapered, and ,said

member having a vertical slot opening' into said tapered side forming shoulders on opposite sides of the' slot, and' a wedge having a concave side for engaging a polish rod and having the other side convex and tapered for engaging the concave tapered surface of said opening and having-a head projecting beyond' the vertical. edge of said body for adjusting purposes and for resting on said shoulders when the grip is not in use.` y

'3., A polish rod grip) andcableholder comprising a body mem er having a vertical' opening concavev on one side for engaging a pollsh rod and concave and tapered onI the other side for engaging a Wedge and having\ tapered side for engaging `the concave ta-y pered side of said opening and having a laferally projecting head for adjustin purposes, and rope sockets formedon `said ody member `for apumping cable.

In testimony whereof, I set my hand, this 8th day of November, 1924:.

' vHENRY A. MELAT.

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