US1574187A - Swivel joint - Google Patents

Description

Feb. 23 ,1926. 1,574,187

' C. S. CRICKMER SWIVEL JOINT Filed May 15, 1924 Y 2 SheetsSheet 1 y (JO/(Amen Feb. 3 1926.. 1,574,187

C. S. CRICKMER SWIVEL JOINT Filed May 1 92 '2 Sheets-Sheet 2 Patented Feb. 23, 1926.

UNITED STATES 1,574,187. PATENTAI-OVFFICVE.

CHARLES S. CRICKMEB, F DALLAS, TEXAS, ASSIGNOR TO THE GUIBERSON COR- POBATION, OF DALLAS, TEXAS, A CORPORATION OF DELAWARE.

SWIVEL JoiN'r.

Application filed May 15, 1924. Serial No. 713,408.

To all whom it may concern:

Be it known that I, CHARLES S. CRIOKMER, citizen of the United States of America, residing at Dallas, in the county of Dallas and State of Texas, have invented certain new and useful Improvements in Swivel Joints, of which the following is a specification. I l

This invention relates to new and useful 1 improvements in swiveljoints.

In sucker rods for pumps and other elongated working elements there is considerable torsional movement, which causes an undue strain and excessive wear as well as interfering with a free and easy operation.

The object of the invention is to provide a joint that may be connected in the rod or other member and which includes a swivel whereby the portions which are connected by the joint may undergo independent rotation and thus the twisting of one portion will not be communicated to the other portion.

A particular object is to provide a joint in which the swivel is formed in a simple man ner and without the use ofinternal screw threads and nuts, and with a few numberof parts. r

Another object is to provide a swlvel joint arranged so that its ends may be formed to couple with any style of connection, whether threaded pin or box and either tapered or straight.

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 specification 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 swivel joint constructed in accordance with my invention,

Fig. 2 is a vertical sectional view of the same,

Fig. 3 is a plan view, Fig. 4 is a cross-sectional view on the line 44 of Fig. 2,

Fig. 5 is a detail of one of the sections of the lower coupling member, and

Figs. 6 and 7 are elevations of modified forms.

In the drawings the numeral 10 designates an upper coupling member and 11 a lower coupling member. In Figs. 1 to 4. I have shown the upper member formed with a box having a screw threaded socket 12. The upper member has an annular depending mar ginal flange 13. The inner face or periphery of the flange isb'evell'ed. An axial shank or mandrel 14 depends from the upper member and is surrounded by an annular seat 15 contiguous to the bevelled flange 18. The mandrel has an integral collar 16 at its lower end forming a head and with its upper surface bevelled. Of course it would be possible to form the mandrel separately and attach it to the upper member in asuitable manner, likewise the collar.

One'of the very important features of the invention is the lower member and its manner of engagement with the mandrel. In order to obviate nuts, bolts, screws, clamps and the like, the member is made in complenientary halves or sections A and B, semicircular in CTOSS-SQOJEIOIL. For convenience the lower member will be described as an 7 entirety. The member 11 has an axial bore 17 in which the mandrel let has a turning fit. At the lower end the bore is formed with a countersunk groove 18 shaped to receive the collar 16.

At the upper end the bore issurrounded by an annular boss 19 fitting in the seat 15 and having a bevelled periphery contacting with the bevelled face of the flange 13. The boss is surrounded at its base by an outwardly directed flat shoulder 20 which bears against the bottom of the flange 13. It will be seen that the upper end of the lower member has a turning or rotating fit in' and against the lower end of the upper member. so that either member has ample bearing surfaces for taking the end or longitudinai thrust.

The lower end of the lower member has a reduced screw threaded pin 21. The upper member 10 has diametrically opposite wrench faces 22; while the lower member 11 has similar faces 23. As before stated, the

lower member 11 is split into two vertical sections on a diametrical vertical plane.

This enables it to be assembled, whereby its boss 19 is engaged in the seat 15 and it is suspended on the mandrel 141. It will be seen that when the pin is screwed into a socket (not shown) as on the upper end of a length of sucker rod, the sections will be fastened together. This is true because the boss prevents lateral displacement of the member. Vilhileheld. together the members are free to undergo independent rotation.

In Fig. 6 I have shown the uppermember IOhaving a taperedv socket 12 While the lower member hastaperedj pin 21. In Fig. 7 I have shown" the upper member provided with a pin 10 as Well as the lower member. It will be seen that the swivel joint can be made in various Ways and ;is of simple and durable construction.

. l/VhatIclaim, is I I I p 1, In a rod joint, a swivel member having a rod coupling member at, one end and. a mandrel; at its opposite end surrounded by aQflange, fixed; relatively: to the mandrel. and extending parallel to its axis to. form a recess, and. a cooperating member formed; in

separable sectionsand with. a. flange toenter ther-ecess of the swivel member and means.

interlockingxvith said mandrel, the opposite. end: of said cooperating member being. adapted to receive arod: coupling. toprevent lateral; displaceinentv of the, sections.

2. In a rod joint,a.swivelymember,having.

arodicoupling. at oneend anda headedmandrel at its opposite end' surrounded; by a flange fixed relatively tothe mandrel. and;

forming an annular recessnhavingan inclined: outer wall, and a cooperating'member' formed; in separable. sections each. having. a.

flange to, fit said recess. and a bore termihating in. an enlarged seat to receive. the.

head oft-he mandrel, the oppositeend Dirt-he cooperating member beyond said. seat: being adapted; to. receilve afirod; coupling to pre-.

vent lateral displacement, of the. sections.

scribed; comprising a. couplingmember having at oneen'd' a mandrel surrounded by a flange fixed, relatively .to the mandrel and:

extendingparallel to its axis. to. form a recess, and a1 cooperating member formed inseparable sections having a flange to. enter the recess of; the couphngmember. to resist her, a, mandrel depending o. A swivel joint of the chancter de-V- having, an. axialborefor receiving and: int-erlocking. with the mandrel, an: upstanding boss in eachsection for engaging in. the flange. of. the upper member to. prevent lateral-displacement of .t] 1e;v sectionsof the-lower member and coupling means/for clamping the lower ends or said sections against laterah movement.

5. In a rod joint-,zu swinehmemberhaving. a. rod coupling member at. one end: and. a mandrel; at its oppositerend surrounded; by a flange fixed relatively to the. mandrel and;

extending parallel toitsr axisto. form a.,r.e-.

cess, and a. cooperating member termed in. separable, sections. andzwith; means to enter the recess. of the SWlSEQlIIlQHlbGI andmeans engaging with saidmandrel, the oppositeendi of said" cooperating member being.- adapted to; receive a; rod. coupling I to prevent latenal: displacement of the sections.

(3. 111.!Lk1i0ilij0lilt, a swivel; member having.

ajrod conplingmexnber at one-1 end and; a mandrel, at its opposite end surrounded by.

a. Wall fixed: relatively. to, the. mandreli to; prior vide a. recess, and; a cooperating member formed in separable sections embracingsaith mandrel, with; one. end disposed; in said; recess, and the opposite end adaptedato be I em braced by zu1'ocl.coi1p1i11g,; to prenent lateral: displacement ofithe. section's.v

In testimony whereof I aflix my signature.

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