Filter arrangement for single-acting telescopic hydraulic cylind

Details Filter arrangement for single-acting telescopic hydraulic cylind Filter arrangement for single-acting telescopic hydraulic cylind

1994-05-06

1996-07-16

Ryznic, John E.

Power plants

Pressure fluid source and motor

With means purging, cleaning or separating undesirables from...

60477, 210133, 210136, F16D 3102, B01D 2710, B01D 2130

Patent

active

055355889

ABSTRACT:
A filter arrangement for a single acting, telescopic, hydraulic cylinder, useful to raise and lower a dump truck bed, is configured for installation in one line of a two-line dump pump to filter only hydraulic fluid returning to sump. This is accomplished by a first one-way check valve which blocks fluid flow through a filter element toward the hydraulic cylinder but allows fluid flow from the hydraulic cylinder to sump and a second one-way check valve, disposed in parallel with the filter element, to block flow to the sump from the hydraulic cylinder while allowing flow from the sump to the hydraulic cylinder so that returning hydraulic fluid passes through the filter element. Preferably the filter element is disposed in a spin-on filter assembly which includes the one-way check valves integral therewith.

REFERENCES:
patent: 3190445 (1965-06-01), Rosaen
patent: 3289841 (1966-12-01), Quinting
patent: 3322281 (1967-05-01), Gulick
patent: 3656621 (1972-04-01), Barthe
patent: 3744244 (1973-07-01), Swoager
patent: 4003397 (1977-01-01), Cooper
patent: 4009572 (1977-03-01), Cooper
patent: 4051031 (1977-09-01), Suzuki
patent: 4268384 (1981-05-01), Rosaen et al.
patent: 4322290 (1982-03-01), Carl
patent: 4439984 (1984-04-01), Martin
patent: 4657040 (1987-04-01), Torres
patent: 5334309 (1994-08-01), Huggett et al.

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