Hydraulic cylinder assembly

Details Hydraulic cylinder assembly Hydraulic cylinder assembly

1993-08-10

1995-07-04

Lopez, F. Daniel

Expansible chamber devices

With removal conduit for liquid seepage from expansible chamber

92153, 92168, F01B 3100

Patent

active

054290384

ABSTRACT:
A hydraulic cylinder bearing gland for seals hydraulic cylinder chamber having an a piston rod extending externally therefrom and includes a cylindrical sleeve with an inner bearing surface having an axial length greater than the outer diameter of the piston rod. The inner bearing surface also has a spiral, helical groove machined therein permitting fluid flow from the cylinder chamber along the length of the inner bearing surface of the bearing gland. A primary seal allows low volume flow of hydraulic fluid therethrough to prevent outside contamination from entering the cylinder chamber, while a secondary seal preventing fluid from exiting the cylinder. A port and annular groove between the primary and secondary seals return the flow of hydraulic fluid to a reservoir.

REFERENCES:
patent: 2618264 (1952-11-01), Bloxsom
patent: 3049370 (1962-08-01), Bertrand
patent: 3902404 (1975-09-01), Breit
patent: 4211151 (1980-07-01), Wallischeck
patent: 4922805 (1990-05-01), Beswick
Catalog published by Hunger United States, Special Hydraulic Cylinders Corp., P.O. Box 37, Rossford, Ohio 43460--photcopy catalog cover and pp. 1-25, 32-39, Dec. 1980.

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