US1031185A - Pipe-pulling machine. - Google Patents

Description

J. KRULISH.

PIPE PULLING MACHINE.

APPLICATION IILBD NOV. 8, 1911.

Patented July 2, 1912.

; UNITED STATES PATENT OFFICE.

JOHN KRULISH, OF BOISE, IDAHO.

PIPE-PULLING MACHINE.

Specification of Letters Patent.

Application filed November 8, 1911.

Patented July 2, 1912.

Serial No. 659,170.

To all whom ,it may concern.

Be it known that 1, 'JOHN :KRULISH, a citizen of the United States, residing at Boise, in the county of Ada and State of \Idaho,.h'ave invented a new and useful Imtransverse section taken immediately above,

a foot operated gripping jaw. Fig. 4 is a detail sectional view on the line 44 of Fig. 1. Fig. 5 is a detail perspective View of the upper portion of a pipe steadying member.

In constructing the device I employ a U- shaped pipe frame 1 provided with suitable transversely arranged base or foot members 2 and adjacent itsbow portion with a horizontally' arranged cross member 3 to which is centrally connected upon one side a vertically arranged rod 4 which extends a considerable distance above the frame 1 and at its upper end carries a horizontally arranged guide member 5. To the other side of the cross member 3 is secured a segmental guide bracket 6 and -also an upright. bar 7, the upper end of which is bent over the bow portion of theframe 1 as shown at 8. A single bolt can'be employed for securing the rod 4, segment 6 and bar 7 to the cross bar 3. The bar 7 not only forms a brace for the bar 3 but also forms a bearing for a pivot pin 9'up0n which is mounted an operating lever 10. This lever supports links 11 and 12 arranged respectively upon opposite sides of the pin 9, and these links are loosely connected to spring, pipe gripping members 13. The gripping members are formed of two parallel sections bolted together atone end, one of said sections being pivotally connected to one of the links 11 or 12, while .the other, section has an offset end portion also provided adjacent its lower end with a ross bar 15 to which is bolted a plate 16 iaving a semi-circular recess 17, also toothed and which forms the fixed jaw of a foot wrench. A movable jaw 18 pivoted upon the plate 16 and being adapted to cooperate with the, recess 17 when it is desired to hold one pipe section against rotation while unscrewing an upper section.

In operation the gripping members 13 are fitted around the pipe to be pulled and the lever 10 operated in pump handle fashion.v As the gripping members rise they grip the pipe and lift it a certain distance, and then release the pipe and drop back and take hold and again lift a certain distance. As these members are connected to the lever 10 upon opposite sides of the pivot pin 9 it will be seen that as one gripping member is falling and getting into position to take another grip upon the'pipe the other member is lifting so that the upward movement of the pipe is practically continuous. As the pipe is drawn upwardly the bracket 6 and guide member will steady it and prevent it from swaying to one side. .lVhen a'length of pipe has been lifted and it is desired to unscrew it before liftingv another length the gripping members are disengaged from'the pipe, and by pressing against the movable jaw 18 the pipe is gripped below the length to be disconnected andheld against rotation during the unscrewing of theupper section. of the pipe, which is of course turned with an ordinary pipe wrench. This enables, one man to perform all the work of pulling a pipe and unscrewingthe pipe sections as they are drawn upwardly.

In order that the device may be used with pipes of difi'erent diameters it will be noted that the gripping jaws 14 have their secured ends held by means of a threaded bolt 14, and by partially unthreading one of the gripping jaws they can be spaced apart sufficiently to enable a larger pipe to be gripped. It will also be understood that when the gripping members are disengaged or unhooked in order to pass a coupler they are again fitted and clamped upon the pipe below the coupler, and so held during the unscrewing of the upper section, thereby havingits upper end engaging the ing a U-shaped frame, a horizontally arranged cross member adjacent the bow portion of said frame, a vertically arranged rod co-nneoted at its lower end to the middle portion of said cross member, a horizontally arranged guide carried by the upper end of said rod, a segmentally arranged guide bracket carried by the cross member and in vertical alinement with the guide carried by the upper end of the rod, an upright bar bow portion of the frame and, its lower end secured to the horizontal cross member, a lever pivotally mounted to the upright bar, andv pipegripping devices pivotally connected 15 a to said leverv upon opposite sides of its pivotal point, as and for the purpose set forth.-

' JOHN KRULISH.

Witnesses: I I

A. B; MONTGOMERY,' HENRY G. HEILER.

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