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US 5,349,887 AGranted
Tubular pipe wrench
OwnerKaye Suwainventor
Life of this patent
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OwnerKaye Suwainventor
Estimating the term…
A tubular pipe wrench for removing and replacing pipes in inaccessible locations includes a generally cylindrical head member having an internal passage large enough to pass the pipe to be worked on and having a cross-sectional configuration like a triangle with greatly rounded corners. A jaw member having teeth is loosely fastened in each of the three corners by bolts which pass through slots in the sidewalls of the head member. Concentric with the head member is a sleeve having ports for receiving the bolts and which maintains the relative spacing of the bolts even though they move radially in the slots. When a pipe is inside of the head member, a slight turning of the head member and sleeve in either direction causes the teeth of the jaw members to make contact with the pipe, moving the jaws into a position where they are wedged between the pipe and the flattened cam surfaces on the inside of the head. Further turning of the sleeve and head will turn the pipe. An extension member which is also cylindrical has a castellated interconnection with the head member. A drive member has a similar castellated interconnection with the extension member and flattened surfaces to be turned with a conventional wrench.
A tubular pipe wrench comprising a generally cylindrical camming head having internal cain surfaces, camming jaws in said camming head, slotted openings in said camming head, a sleeve surrounding said camming head, and bolts passing through said sleeve and said slotted openings and threadedly engaged with said camming jaws, and generally cylindrical drive means connected to said camming head including flats on the surface thereof.
A tubular pipe wrench for turning a pipe comprising a generally cylindrical camming head having internal cam surfaces and a plurality of generally circumferential slotted openings, said cam surfaces being equally spaced and including substantial uncurved areas;
A tubular pipe wrench for turning a pipe comprising a hollow generally cylindrical camming head having a plurality of internal cam surfaces, a plurality of camming jaws in said camming head between said cam surfaces, a plurality of slotted openings in said camming head, a sleeve surrounding said camming head and bolts passing through said sleeve and said slotted openings and threadedly engaged with said camming jaws to secure said camming jaws in said camming head, and drive means on one end of said camming head;
A tubular pipe wrench comprising a camming head having internal cam surfaces, camming jaws in said camming head, slotted openings in the sidewalls of said camming head, a sleeve surrounding said camming head and bolts passing through said sleeve and said slotted openings and threadedly engaged with said camming jaws to secure said camming jaws in said camming head, a plurality of projections at one end of said camming head and circumferential grooves on said projections;
Dependencies are inferred from the claim text.