Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
355 words
In a leakproof anchor fastener including, a hollow sleeve, a head on an end of the sleeve, an internally threaded tail on said hollow sleeve, said sleeve having longitudinal slots thereon between said head and tail to form outwardly expandable and foldable fastening strips, a screw extended through said head and sleeve and being threaded into said tail, the improvement of a head on said screw initially spaced from the head of the sleeve to facilitate the turning of the screw prior to the expanding of the sleeve thereby to prevent binding between said threaded tail and said screw, a washer on a face of said sleeve head adjacent said screw head, a sealing washer on the other face of said sleeve head for sealing said sleeve head when said anchor bolt is set, means to guide the folding of said strips of slotted sleeve portion outwardly whereby, after said screw head bears against said sleeve head, said tail travels on the screw toward said sleeve head for folding and substantially flattening said strips against a work between said sleeve head and said strips, a rigid shank between said sleeve head and said slotted sleeve portion, said shank being shorter than the minimum thickness of the work to be clinched between said sleeve head and the expanded slotted portion, thereby to cause the flattening of the expanded slotted portion against said work, said sleeve head having flat portions on its periphery for engagement by a tool for holding said sleeve head against rotation during the turning of the screw, said sleeve head having a recess on each face thereof for the respective washers, said guiding means being an internal notch grooved into the inner periphery of said slotted sleeve portion spaced from said sleeve head, thereby to cause the collapsing of the strips outwardly and toward said sleeve head when said tail of said sleeve is pulled toward said sleeve head, said notch being offset from the middle of each slot toward the end of the slot nearer to the sleeve head so that the collapsed strips fold snugly and substantially flat against the work.
Claim 2
Dependent Claim
355 words
In a leakproof anchor fastener including, a hollow sleeve, a head on an end of the sleeve, an internally threaded tail on said hollow sleeve, said sleeve having longitudinal slots thereon between said head and tail to form outwardly expandable and foldable fastening strips, a screw extended through said head and sleeve and being threaded into said tail, the improvement of a head on said screw initially spaced from the head of the sleeve to facilitate the turning of the screw prior to the expanding of the sleeve thereby to prevent binding between said threaded tail and said screw, a washer on a face of said sleeve head adjacent said screw head, a sealing washer on the other face of said sleeve head for sealing said sleeve head when said anchor bolt is set, means to guide the folding of said strips of slotted sleeve portion outwardly whereby, after said screw head bears against said sleeve head, said tail travels on the screw toward said sleeve head for folding and substantially flattening said strips against a work between said sleeve head and said strips, a rigid shank between said sleeve head and said slotted sleeve portion, said shank being shorter than the minimum thickness of the work to be clinched between said sleeve head and the expanded slotted portion, thereby to cause the flattening of the expanded slotted portion against said work, said sleeve head having flat portions on its periphery for engagement by a tool for holding said sleeve head against rotation during the turning of the screw, said sleeve head having a recess on each face thereof for the respective washers, said guiding means being an internal notch grooved into the inner periphery of said slotted sleeve portion spaced from said sleeve head, thereby to cause the collapsing of the strips outwardly and toward said sleeve head when said tail of said sleeve is pulled toward said sleeve head, said notch being offset from the middle of each slot toward the end of the slot nearer to the sleeve head so that the collapsed strips fold snugly and substantially flat against the work.