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US 6,976,288 B1Granted
Rod gripper
OwnerValentin Lucainventor
Life of this patent
Estimating the term…
Abstract
A bar or rod gripper for arresting the linear axial movement of a rod, e.g. the piston rod of a door closure between a door open or closed position, that includes a compressible bushing slidably disposed about the rod or bar, and a canter washer disposed about the compression bushing whereby the canter washer, when tilted, will cause the compression bushing to compress to impose a surface to surface frictional force onto the bar or rod to resist or restrain the axial movement thereof without scoring, pitting or indenting the outer surface of the rod.
Claims5
A rod gripper assembly comprising:
- an elongated rod,
- a compression bushing adapted to be slidably disposed for relative axial displacement along said rod,
- said compression bushing having a longitudinal length,
- a canter washer having an opening therein,
- said opening being sized to receive said bushing, whereby said canter washer when shifted to a tilted position imparts a compressive force onto said bushing which is transmitted to the associated rod to restrain any movement of said rod relative to said bushing without scoring, indenting or pitting the outer surface of said rod wherein said bushing includes:
- a plurality of segments circumferentially spaced about said rod,
- each of said segments including a longitudinal length and a radially outwardly extending flange defining the opposed ends of said segment forming an intermediate portion therebetween,
- said intermediate portion of said segments forming an annular groove between said flanges.
5 more elements
A door closure comprising:
- a cylinder having a piston reciprocally mounted therein,
- a piston rod connected to said piston and said piston rod having a portion extending outwardly of the cylinder,
- a gripper means mounted on the extended portion of said piston rod,
- said gripper means including a compression bushing slidably disposed on the extended portion of said piston rod, and
- means for exerting a compressive force onto said compression bushing whereby said compressive force imparted on said bushing is transmitted to said piston rod to frictionally restrain any axial movement of said piston rod relative to said bushing wherein said bushing includes:
- a plurality of longitudinal segments circumferentially spaced about said piston rod,
- each of said segments including a radially outwardly extending flange defining the opposed ends of each of said segment and an intermediate portion therebetween,
- said intermediate portion of said segments forming an annular groove between said flanges, and
- said compression means including a canting washer having an opening sized to receive said segments circumferentially spaced about said piston rod whereby said canting washer when tilted from its normal position transmits a compressive force on said segments to impart a frictional force on said piston rod to restrain axial movement of said piston rod relative to said bushing.
6 more elements
Dependencies are inferred from the claim text.