Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1987-03-26
1989-02-28
Shoap, Allan N.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
92168, 187 1R, 277 64, 277105, 277125, 277187, 277205, 277222, F16J 1518
Patent
active
048078905
ABSTRACT:
An improvement in a sealing combination between a head of a hydraulic cylinder and a plastic covered cable traversing therethrough, including the plastic covered cable connected with a piston interiorly of the cylinder so as to be moved longitudinally responsive to hydraulic pressure applied to the piston traversing interiorly of the cylinder, a gland disposed about and sealingly encompassing the plastic covered cable, a head defining an annular packing box about the plastic covered cable and adapted to receive the gland for holding a seal in place and a wiper ring disposed in the gland and about the plastic covered cable for wiping dirt and the like therefrom before the cable enters the sealing combination; characterized by a split ring of resilient material emplaced in the bottom of the packing box and encompassing the plastic covered cable without sealing engagement therewith; a split backup compression ring of thermoplastic material disposed in the packing box so as to be responsive to the compressive force of the split ring and encompassing the plastic covered cable; and at least one compressed, split pressure balanced seal resilient material disposed in the top of the packing box. The spacer ring has sufficient compressive force to effect sealing with even a single seal even though the seal is split. Specific preferred structures are disclosed for the respective embodiments.
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Gorman Gerald W.
Johnston Everett E.
Esco Elevators, Inc.
Fails James C.
Mantooth Geoffrey A.
Shoap Allan N.
Zobal Arthur F.
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