US1569318A

US1569318A - Pump jack

Info

Publication number: US1569318A
Application number: US742558A
Authority: US
Inventors: Gardner Frank
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-10-09
Filing date: 1924-10-09
Publication date: 1926-01-12
Anticipated expiration: 1943-01-12

Description

Jan. 12 1926.

F. GARDNER PUMP JACK Filed 0G12. 9, 1924 2 Sheets-Sheet 1 @Hoz may* Jan. 12 1926. 1,569,318.

F, GARDNER PUMP JACK Filed oct. 9, 1924 2 sheets-sheet 2 zZ f/ 0j 'Ffa/1L* @ordner i PatentedJan. 12, 19'26.

- UNITED xSTATES FRANK GARDNER, OF DALLAS, TEXAS.'

1 runt? JACK.

- Application ated october s, 1924. serial No. 742,558.

To all whom it may concern.' Y

Be it known that I, FRANK GARDNER, a

, citizen of the United States of America, re-

siding .at Dallas, in the county of Dallas and State of Texas, have invented certain new andl useful Improvements Vin Pump l Jacks, of which the'following is a specificabend or distort the same is obviated.

A further object is to produce a long stroke with a short beam.

Another object is to provide a simple, durable and eicient jack capable of heavy duty and long life.

A construction designed to carry out the invention will be hereinafter described together with other features of the invention.

The invention will be more readily understood from a reading of the following specifica-tion and by reference to the accompanying drawings, in which an example of the invention is shown, and wherein:

Fig. 1 is an elevation of a pump jack constructed in accordance with my invention,

Fig. 2 is a plan view of the same,

Fig. 3 is a front elevation of the jack detached from the well,

Fig. 4 is an enlarged sectional view on the line 4 4 of Fig. 1,

Fig. 5 is an enlarged sectional view on the line 5 5 of Fig. 1,

Fig. 6 is an enlarged sectional view on the line 6--6 of Fig. 1,

Fig. 7 is an enlarged sec-tional view taken on the line 7 7 of Fig. 1 and Fig. 8 is an enlarged sectional view on the lino 8 8 of Fig. 1.

In the drawings the numeral 10 designates a base formed of a pair of I-beams. At the rear end of the base is pivotcd a Samson post 11 composed of a pair of channel members having their open sides facing, as is shown in Fig` 6. A tenon block 12 is bolted between the lower ends of the channel members of the post and has a' depending central tenon or ear, 13. A bearing bolt 14 passes through the base and the tenon, the latter being spaced from the beams of the base by blocks 15. The block and post are spaced above the base to clear the latter when swlnging.

A knuckle joint is formed at the upper end of the post b a bearing block 16 bolted in the post and aving upstanding ears 17 receiving a tenon 18 depending from a block 19 as is best shown in Fig. 5. The tenon is pivoted between the ears on a bolt 20. The

block 19 is bolted between the rear ends of channel members formin a horizontal beam 21. At the front end o the beam hangers 22 spaced apart by a plate 23 are bolted to the inner faces of the channels. The hangers have hooks 24 depending below the beam and directed forwardly for the gudgeon A of the polish rod, B. The forward end of the base is fastened to the well casing by a clamp 25.

One of the important features of the invention is a toggle joint and pitman whereby the beam is swung. A lower link 26 has an ear 27 pivotedvon a bolt 28 between cheek blocks 29 mounted on the inner side of the base beams as is shown best in Fig. 8. An upper link 30, has an eye journaled on a pin 31 Fig. 5) confined in a slotted bearing block 32 secured within and between the channels of the post 11, just below the block 16. An upright pitman 33 has an ear 34 at its lower end. This ear is received in the fork 35 formed on the lower end of the pitman 30 (Fig. 7) and this fork is disposed in a yoke 36 on the upper end of the link 26. The yoke is mounted in a shackle 37 of a link 38. A king bolt 39 passing through the

ports

34, 35, 36 and 37 forms a pivot and constitute the knuckle of a toggle joint.

The link 38 is connected to the pull-rod of the pumping power. When the beam 21 is in/a horizontal position as is shown'in full lines in Fig. 1, the

links

26 and 30 are alined and inclined from the base to the post, forming a. support and a brace for the latter. At its upper end the pitman has a cap 40 having a transverse fulcrum boss 41 engaging in the step of a bearing block 42 (Fig. 4) bolted to the underside of the beam.

ln operating the jack the toggle joint is broken by the downward pressure of the pitman 33 on the king bolt 39, due to the load lifting the beam 21.

on the polish rod B. When the link 38 is moved to the right (Fig. 1) on the slack stroke of the connecting rod, the pitman. is free to act. When the toggle joint is broken the

links

26 and 30 are swung downwardly and the Samson post 11 is pulled forwardly, whereby the beam 21 and pitman are tilted forwardly as is shown in dotted lines in Fig. 1. The forward or tilting movement of the beam is suiicient to compensate for its swing as the polish rod moves downward, thus keeping the gudgeon A in line with they rod and seated in the hooks 24. Y

This operation produces av long stroke lowing to the toggle joint and the tilting post and the fulcrum on the pitman. Also the travel of the polish rod is followed by the hooks 24 and the end of the beam. Upon the pull stroke the link 38 is moved tov restore the

links

26 and 30 during which movement the pitman 33 is elevated, thus By reason of the toggle joint a comparatively short beam' and base" may be used and a compact and substantial jack is thus produced. The parts may of course be constructed in accordance with the field practice and various changes in the size and shape and arrangement may be made within the scope of the appended claims.

What'I claim, is:

. 1. In a pump jack, a base, a Samson post pivoted on the base, a beam fulcrumed on the xpost, a three element toggle lever and pitman bracing and actuating connection .be tween the base, post andlever, two of which elements are normally alined and extend across the angle between the base and post, and means movable in a horizontal plane for moving said normally alined elements into and out of alinement.

2. In a pump jack of the character described, a horizontal base, a Samson post pivoted on the base, a beam fulcrumed on the post, a toggle joint connected with the base and post, a pitman connecting the toggle joint with the beam, and a reciprocating element ivoted to the toggle joint and extending orizontally from t-he'toggle joint. i 3. In a pump jack of the character described, a horizontal base, a post hinged to the base, a beam fulcrumed on the post, an inclined brace including a knuckle joint and extending across the angle between the base and the post, a pitman extending from the brace to the beam, said brace normally supporting the post in an upright position and the beam in a horizontal position, and rectilinearly movable means for displacing the brace at the knuckle joint to tilt the post and swing the beam.

4. In a pump jack of the character described a base, a post hinged to the base, a bea iulcrumed on the post, an inclined lol-abbY including a knuckle joint and extending from the base to the post, a pitman extending from the brace to the beam, said brace normally supporting the post in an upright position and the beam in a horizontal position, and a reciprocatory horizontal link pivoted to thev brace for swinging the vsame to tilt the post and swing the beam.

'5. In a pump jack of the character described, a horizontal base, a Samson post lower end to the knuckle joint and fulcrumed at its upper end to the beam, said upper and lower links normally being alined and constituting a brace for the post.

6; In a pump jack, a base, a Samson post pivoted on the base, a beam fulcrumed on the post, a pair' of normally alined links of substantially equal length extending across the angle between the base and post and pivotally connected at their inner ends to each other and at their outer ends to the base and post respectively, a pitman pivoted at its upper end to the beam and at its lower end to the links, and an actuating link arranged to reciprocate in a horizontal plane 'and pivotally coupled to said links and pitman.

7. In a pump jack of the character described, a base, a Samson post pivoted on the base, a beam ulcrumed on the post, a pitman depending from the beam an upper link inclined downwardly from the post, a lower link extending upwardly from the base, said upper and lower links extending across the angle between the base and the post and being normally alined and forming a brace for the post, an actuating link, all of said links and the pitman having a common point of connection, and a king bolt passing through said parts at the common point of connection and forming therewith a toggle joint.

8. In a pump jack of the character described, a horizontal base, a Samson post pivoted on the rear portion of the base, a horizontal beam having its rear end pivoted on the post, means at the front end of the beam for connecting with and supporting a polish rod, an inclined toggle link pivoted at its lower end to the forward portion of the base, a second toggle link pivoted at its upper end to the post, a king bolt connecting the ends of the toggle links, an actuating link having one end pivoted on the bolt, and a pitman having' its lower end pivoted on the bolt and having pivotal connection at its upper end with the beam.

9. In a pump jack of the character described, a horizontal base, a Samson post pivoted on the rear portion of the base, a horizontal beam having its rear end pivoted on the post, means at the front end of the beam for connecting with and supporting a polish rod, an inclined toggle link pivoted at its lower end to the forward portion of the base, a second toggle link pivoted at its upper end to the post, a king bolt connecting the ends of the toggle links, an actuating link having one end pivoted on the bolt, and a pitman having its lower end pivoted on the bolt and having pivotal connection at its upper end with the beam at a point adjacent the fulcrnm point of the beam.

10. In a pump jack of the character described, a horizontalbase formed of longitudinal members, a vertical Samson post having an ear at its lower end pivoted between the members ofthe base, said post being formed of spaced nprights, a lower inclined link having its lower end pivoted between the members of the base, an upper inclined link having its upper end pivoted be.

tween Athe uprights of the post, a transverse king bolt on which the inclined links are pivoted, an actuating link having one end pivoted on the bolt, a horizontal beam, a pivotal connection between the upper end of the post and the rear portion of the mem- FRANK GARDNER.