Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
148 words
A puller device for longitudinally extracting generally cylindrical valve assemblies and the like of the type having an extremity projecting from a rigid mounting, said extremity being provided with a circumferential indentation, said puller device having an elongated puller shaft adapted to be positioned axially of said assembly, means at the inner end of said shaft for grasping and interlocking with said projecting end of said assembly, an annular abutment member surrounding the inner portion of said shaft and said grasping means and having an inner end for abutment against the mounting adjacent said projecting portion, an annular puller nut also surrounding said shaft and disposed outwardly of said annular abutment and having extended threaded interconnection with said abutment member, said shaft having at its outward portion an annular lock-receiving shoulder, and said puller nut having a shiftable lock plate slotted for locking and interengaging with said shoulder.
Claim 2
Dependent Claim
148 words
A puller device for longitudinally extracting generally cylindrical valve assemblies and the like of the type having an extremity projecting from a rigid mounting, said extremity being provided with a circumferential indentation, said puller device having an elongated puller shaft adapted to be positioned axially of said assembly, means at the inner end of said shaft for grasping and interlocking with said projecting end of said assembly, an annular abutment member surrounding the inner portion of said shaft and said grasping means and having an inner end for abutment against the mounting adjacent said projecting portion, an annular puller nut also surrounding said shaft and disposed outwardly of said annular abutment and having extended threaded interconnection with said abutment member, said shaft having at its outward portion an annular lock-receiving shoulder, and said puller nut having a shiftable lock plate slotted for locking and interengaging with said shoulder.
Claim 3
Dependent Claim
55 words
The structure set forth in claim 1 wherein said puller shaft carries a plurality of individually adjustable annular lock-receiving shoulders spaced inwardly at predetermined distances from the outer extremity of said shaft, and said lock plate being successively engageable with first the outermost and then the next innermost of said shoulders for multistage pulling action.
Claim 4
Dependent Claim
67 words
The structure set forth in claim 1 wherein said means for grasping and interlocking with the projecting end of said assembly constitutes a pair of opposed gripping claws having hooked ends for oppositely engaging the circumferential indentation of said assembly extremity, and a slidable slip collar for surrounding said claws in retracted position to retain the same in interlocking engagement with the projecting end of said assembly.
Claim 5
Dependent Claim
47 words
The structure set forth in claim 1 wherein said annular abutment member is concentrically applied over the inner end portion of said puller shaft and said gripping means and has an externally threaded outer end threadedly engageable with an internally threaded inner end of said puller nut.
Claim 6
Dependent Claim
40 words
The structure set forth in claim 1 wherein at least the outer portion of said puller shaft is externally threaded for predetermined adjustment of internally threaded nuts to position and limit at least a pair of said annular lock-receiving shoulders.