US930179A - Polished-rod gripper. - Google Patents

Description

E. M. HIBBARD. POLISHED BOD GRIPPER. APPLICATION 1';

LED MAY 11, 1907. RENEWED MAY 19, 1909.

Patented Aug. 3, 1909.

- UNITED STATES PATENT OFFICE.

EARL M. HIBBARD, OF BOLIVAR, NEW YORK, ASSIGNO'R or oNnHALF To ARCH E. HVIBBA'RD,

or BOLIVAR, NEW YORK.

- Specification of Letters Patent. Application filed Kay 11, 1907, Serial No. 373,042. Renewed May19, 1909.

Pomsmsmaon GRIPPER.

Patented Aug. e, 1909.

Serial No. 496,938.

To all whom it may concern:

Be it known that I, EARL M. HIBBARD, residing at Bolivar, in the county'of Allegany and State of New York, have invented a new and Improved Polished-Rod Gripper, of

which the following is a specification.

. and which from time to time must be shifted to provide for a well tubing.

Heretofore it has been a common practice to provide clamping devices having toothed or serrated dogs or dies for gripping the rod. This method of gripping the rod is obj ectionable since it mar 0r roughens the face of the rod, Which rod, to eifect the best results, should always present a smooth polished surface, especially at such points where it passes through the stuffing box. Again, in the use of the ordinary forms of pipe clamps for oil well rods, it is usually required that after the tubing is clamped, a die wrench be usedwhereby to grip the rod to turn it when raising or lowering thesame.

My invention is especially designed for overcoming the objections above noted and for providing means having such construcproper adjustment of the tion whereby the same not only acts as a clamping means for engaging the rod in such manner as to raise or lower it under the swinging action of the beam or jack, but also acts as means for turning the said rod as the conditions may require while adjusting the polished rod, separating valves and holding rods While taking up surface line, etc., the gripping of the rod in my improvement being effected by frictional engagement of the clamp with the rod in such manner as to leave the said rod smooth, such condition of the rod being essential since it is often necessary to change the adjuster device used in connection with the beam and the rod for eifecting the necessary shifting of that part of the rod that works through the stufiing box.

With other objects in view to be hereinafter'explained, my invention consists in certain combination and eculiar arrangement of parts, all of whic will be hereinthe line 22 on Fig. 1.

after fully explained, specifically pointed out in theappended claim'and illustrated in the accompanying drawings, in which:

Figure 1, is a view that illustrates the general arrangement of my invention in connection with an oil well pump rigging. Fig. 2, is a horizontal section taken substantially on Fig. 3, is a longitudinal section of the same, taken on the line 33 on Fig.2. Fig. 4, is a perspective. view ofthe bifurcated member that has, the fixedly held rod clamper. Fig. 5, is a peripective view of the adjuster rod gripper.

ig. 6, is a similar view of the combined eccentric lever and handle for turning the rod.

In the accompanying drawing A designates the beam, B the polished rod, 0 the adjuster on the rod, D the V or rocker frame, E the power cable or line, F the pitman and H the stufiing box for the rod B, all of which may be of-any'well-known construction and operrate in the usual manner, said parts, per 86, forming no part of my invention.

Theclamping devices, of which in the practical ap lication of my invention two are used, one a ove and the other below the beam, see Fig. 1, and which are designated G-G, each consists of a body portion having a bifurcated shape and comprises the o posite parallel side arms 1 and a fixedly he d clam ing member 2, having a smooth con cave seat for engaging with the polished rod B. 3 designates an adjustable clamping member which opposes the member 2 and has a concaved seat 30 for engaging the rod B, and

the said member 3 is slidably mounted on the side arms 1, it having its opposite edges formed with horizontal grooves 10 for receiving the said arms as clearly shown in the drawing.

4 designates a lever or handle, in practice, about twenty inches long, the head portion of whichhas a transverse aperture 40 and a cam or eccentric face 41 for coacting with the sliding clamp '3. The cam or head ortionof the lever is mounted on cross bo l 1passes through the aperture 40 in the cross t 5 that ead and into the recess 50 of the side arms 1 and is held therein by the weight of the arm and the cam' 41 The. outer end of the lever arm 4 has an e' e 42 to receive a "weight when it is desired to hold the rod clamped at its set or adjusted'position.

From the foregoing description, taken in connection with the accompanying drawing, the complete construction, the general manner of use and the advantages ofmy invention, it is believed, will be readily apparent.

It will be noticed that whenthe beam A moves up or down it raises or lowers the polished rod B, and since the beam makes from 10 to 60 strokes per minute, that in order to bu the valves or pull up out of barrel, breaking or loosening the paraffin from the tubing, screwing up or unscrewing rods etc. while the rod is in motion, it will only be necessary to loosen the adjuster (it being understood that the two grips are in place), after which to raise the pohshed red when the beam rises, catch the rod with the lower grip and when it lowers then catch the rodwith the upper grip to lower the rod and vice versa.

Having thus described my invention what I claim and desire to secure by Letters Pat ent is:

A pohshed rod gripper, comprising a body portion having a bifurcated extension, the

side arms of which, are recessed near the outer ends, a clamping member having a smooth pipe engaging face and forming a fixed part of the body p0rti0n', a second clamping vmember slidably mounted on the side arms ,of the body, and, having a smooth EARL M. HIBBARD.

Witnesses:

M; G. HIBBARD, CLARENCE BURoH. I

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