Thread-on collared yoke for power riser pipes
OwnerEmile H. Gagnoninventor
Life of this patent
Estimating the term…
Abstract
An attachable/detachable swivel hook and yoke for lifting a vertically oriented riser pipe section into place such that the lifted pipe section may be threadably joined to another upright riser section. The hook is swivel mounted to a yoke bracket and a threaded collar is adapted to threadably fit on the threads of a riser pipe to be lifted. The collar is held on the lifted riser pipe so that it may swivel on hook and be threaded to said upright riser pipe section.
Claims20
An attachable/detachable swivel hook and yoke bracket for lifting a vertically oriented utility riser pipe section having a longitudinal conduit bore therein into place where the lifted pipe section may be threadably joined to another upright section by mating threads in order to allow electrical power cables to run through the conduit formed by the mated risers, said hook comprising:
- hook attachment means swivel mounted to a yoke bracket for receiving a winch lift;
- a hollow threaded collar adapted to threadably fit on the threads of a riser pipe to be lifted, said threaded collar detachably incorporated into and made part of said lifting yoke yet being removably fastened thereto;
- manually operable means lying in planes transverse to the longitudinal bore for removably securing said collar to said yoke bracket and fixably yet removably securing said threaded-on collar to a riser section and allowing a lifted riser section to rotate in a vertically plumb position and thus mate itself with another riser;
- and
- means associated with said collared lifting yoke for allowing a utility worker to fish power lines through such threadably mated risers and said hollow collar.
A hollow, collared swivel hook for vertically lifting a normally horizontally oriented utility pipe section into place where the lifted pipe section may be vertically oriented by the lift and threadably joined to another riser by mating threads of another riser pipe, said hook comprising:
- a threaded collar incorporated into and made part of a lifting yoke by being bolted to the hook;
- a thrust bearing for said lifting yoke which allows said yoke to rotate in a vertically plumb position and thus threadably mate itself to said other riser;
- and
- thread means for fixably yet removably securing said collar to said lifted riser pipe to be threaded to said other riser.
A method of lifting and threading an upright riser pipe section having threads at both ends to another such section, said method comprising:
- forming a threaded collar as a lower lifting portion of a lifting yoke;
- threading said collar onto a riser pipe section on the ground and intended to be to be lifted and mated to another fixed riser pipe when in a vertical position;
- fixably yet removably securing said collar to said lifted riser section in order to allow said lifted riser section to rotate in a vertically plumb position;
- lifting said riser section into a vertically upright position by said thread-on collar;
- assuring rotation manually of said yoke, said fixably secured collar and the lifted riser in said vertically upright position;
- manually threading said lifted riser pipe into said upright riser pipe;
- removing the lifting yoke from a workman bucket elevated in the air above the ground;
- and
- manually installing power lines through a continuous conduit formed in the mated riser pipes.
Dependencies are inferred from the claim text.