Fluid cylinder with improved wear rings

Details Fluid cylinder with improved wear rings Fluid cylinder with improved wear rings

1989-03-27

1991-10-01

Look, Edward K.

Expansible chamber devices

With lubricating means

Piston has lubricant retaining or conducting means

92158, 92155, 92153, 92168, 277201, 384 13, 384 32, F01B 3110

Patent

active

050522787

ABSTRACT:
A fluid cylinder has improved wear rings in a combination that includes a tube having a tubular wall and first and second end caps. The tubular wall defines a cylinder bore that has a central axis. Each end cap also has a bore extending along the central axis. A piston assembly is mounted in the cylinder bore with a piston rod mounted in the bore of one of the end caps, so that the piston assembly is slidable along the central axis. The piston assembly includes a piston head that has a reservoir defined by an annular recess opening toward the tubular wall. The reservoir houses a prepacked lubricant. One wear ring closes off the annular recess from the tubular wall. The wear ring seal has a plurality of radial apertures extending therethrough, through which lubricant is capable of flowing to lubricate the piston assembly. Another wear ring closes off a reservoir in the bore of an end cap and functions as the first mentioned wear ring also to lubricate the piston assembly.

REFERENCES:
patent: 2827860 (1958-03-01), Roberts
patent: 3204536 (1965-09-01), Taylor
patent: 3718209 (1973-02-01), Moslo
patent: 3777627 (1973-12-01), Goade
patent: 4005763 (1977-01-01), Wallis
patent: 4023469 (1977-05-01), Miller
patent: 4076103 (1978-02-01), Wallis
patent: 4171665 (1979-10-01), Stoll
patent: 4557351 (1985-12-01), Volk
patent: 4759265 (1988-07-01), Stoll et al.

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