US1420025A - Pull-rod bearing - Google Patents

Description

F. B. DUNLAP. PULL ROD BEARING. APPLICATION FILED APILZZ, ISIIZO.

3,420,025. Patented June 20, 1922.

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FORREST IB. DUNLAP, OF TULSA, OKLAHOMA, ASSIGNOR 0F ONE-HALF TO HAROLD L. SULLIVAN, OF TULSA,'OKLAH`OMA.

PULL-ROD BEARING.

Application led April 22,v

To all whom t may concern Be it known that I, F onnnsr B. DUNLAP, a citizen of the United States, residing at Tulsa, in the county of Tulsa and State ofV Oklahoma, have invented certain new and useful Improvements in Pull-Rod Bearings; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The object of the invention is to provide a simple and efcient pull rod bearing for oil well pump rigs and the like wherein the friction ordinarily incident to the operation ofthe pump by reason of the support of the pull rod between the motor or pump operating mechanism and the well may be minimized to secure the maximum eiiiciency of the pumping mechanism or of the power eX- pended in connection with the operation of pumping by the motor, and furthermore to facilitate the mounting or running of the pull rod in arranging the pump mechanism for operation, and with these objects in view the invention consists in a construction and combination of parts of which a preferred embodiment is shown in the accompanying drawing, wherein- Figure 1 is a general view of a pumping plant showing the pull rod supported at intervals by bearings embodying the invention.

Figure 2 is a detail view in section of one of the pull rod bearings.

Figure 3 is a side view of the same.

It is common in the oil eld to operate a number of pumps from a common plant or motor located at considerable distances from the wells and to communicate motion from the engine or motor to the several pumps by means of pull rods 10 which are extended horizontally or in substantially horizontal directions radially from the engine or motor, and it is with a view to minimizing the friction due to the movement of the pull rod at the necessary points of support thereof between the motor and the well that the device embodying the invention has been designed, and in the form illustrated in the drawings the-same consists essentially of a standard 11 preferably tubular and consisting of a pipe of suitable dimensions which may readily be driven into the ground at any desired point and at intervals throughout the length of the Specification of Letters Patent. Pajnted June 20, 1922.

1920. serial No. 375,802.

run of the pull rod,` and heads 12 which are swiveled upon these standards and carry grooved rollers 13 for guiding and supporting pull rods. As shown the head is provided with a depending spindle portion 14 fitted in the upper end of the tubular standard and held from downward displacement by any suitable means such as a shoulder 15 thereon, and a looped housing 16 yrising from the spindle and supporting a tubular shaft 17 extending through a bushing 18 carried by the roller, suitable terminal washers 19 being provided upon the bushing to hold the side surfaces of the roller out of frictional contact with the inner surfaces of the walls of the housing. The shaft upon which the roller is mounted is preferably tubular as indicated and connected with one end thereof is a grease cup 20 by which a lubricant may be forcibly fed into the bore of the shaft to be expelled through a feed opening 21 formed in the wall of the shaft within the bushing to minimize the friction of the roller thereon. Anti-friction rollers 22 may also be interposed between the bushing and the shaft to still further reduce the friction, and if desired the lower portion of the housing may be closed at its ends to form an oil pan 23 in which the lower portion of the periphery of the wheel dips, so that as the latter turns it will carry the oil to the surface which is traversed by the pull rod.

By means of such a construction and arrangement, after the erection of the apparatus and the initial oiling of the same, or the adjustment of the grease cup, the operation may continue indefinitely without further consideration by the attendant and without the disadvantages incident to heating and consequent injury which is common in the ordinary practice. It will be obvious that the device may be set up at any desired intervals and may be removed and redisposed in relation to other wells with a minimum effort and loss of time and the direction of movement of the pull rod will insure the maintenance of the head in the upper directional position with reference thereto without requiring the attention of the operator.

What is claimed is 1. A bearing for a well pump pull rod comprising aroller, a shaft to support the roller, a housing for the roller having spaced side and housing partly Closing the sides of the housing and terminating relatively Vcloseto the periphery-of the roller to form a reser- Voir for oil to lubrieate said periphery.

3. A bearing' for a Well pump pull rod oom- `prising a head, a roller thereon, a tubular shaft supporting the roller having a Closure head 4at one end, an oil cup at the other end,

y and means of escape for oil through the shaft to `journal the surface of the roller.V

In testimony whereof I affix my signature vin presence of two Witnesses.

FORREST B. DUNLAP.

Witnesses: y

W. E. DAVIDSON, MASON Krr'rnss.

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