Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
240 words
As a new article of manufacture, a gripper device designed for use as a she-bolt in gripping the outer end region of a tie rod in associated relation with a concrete wall form, said device comprising a tubular shell having a frusto-conical front section and a cylindrical rear section, tooth-equipped jaw segments slidable in said front section and defining a chuck structure for reception therethrough of the tie rod, a circular wall extending across the rear end of the shell, a compression spring interposed between said wall and jaw segments and effective to bias the latter forwardly into tie rod-gripping relationship, an elongated cylindrical pull tube through which the tie rod is adapted to extend to any desired extent including through the open rear end of the tube, said pull tube projecting centrally and slidably through said circular wall coaxially with the shell and being capable of sliding movement longitudinally on the tie rod, said pull tube having its forward end operatively connected in common to the rear ends of the chuck segments and effective when pulled rearwardly to release such segments from the tie rod, and a radial flange carried on the rear end of said hollow pull tube exteriorly of the shell and disposed in close proximity to said circular wall, said flange, in combination with said circular wall, constituting a pry-head by means of which the pull tube may be pried rearwardly with respect to the shell.
Claim 2
Dependent Claim
240 words
As a new article of manufacture, a gripper device designed for use as a she-bolt in gripping the outer end region of a tie rod in associated relation with a concrete wall form, said device comprising a tubular shell having a frusto-conical front section and a cylindrical rear section, tooth-equipped jaw segments slidable in said front section and defining a chuck structure for reception therethrough of the tie rod, a circular wall extending across the rear end of the shell, a compression spring interposed between said wall and jaw segments and effective to bias the latter forwardly into tie rod-gripping relationship, an elongated cylindrical pull tube through which the tie rod is adapted to extend to any desired extent including through the open rear end of the tube, said pull tube projecting centrally and slidably through said circular wall coaxially with the shell and being capable of sliding movement longitudinally on the tie rod, said pull tube having its forward end operatively connected in common to the rear ends of the chuck segments and effective when pulled rearwardly to release such segments from the tie rod, and a radial flange carried on the rear end of said hollow pull tube exteriorly of the shell and disposed in close proximity to said circular wall, said flange, in combination with said circular wall, constituting a pry-head by means of which the pull tube may be pried rearwardly with respect to the shell.
Claim 3
Dependent Claim
42 words
A gripper device as set forth in claim 1 and wherein the forward end of said pull tube carries a radial pull flange which projects radially into and interlocks with a series of slots in the rear ends of said jaw segments.
Claim 4
Dependent Claim
38 words
A gripper device as set forth in claim 2 and wherein the forward end of said shell is cupped inwardly to provide for the shell a front annular wall through which the tie rod is adapted to project.
Claim 5
Dependent Claim
40 words
A gripper device as set forth in claim 3 and wherein there is disposed within the forward cupped end of the shell immediately forwardly of the jaw segments a sealing ring through which the tie rod is adapted to project.