Oil return loop of a hydraulic cylinder

Details Oil return loop of a hydraulic cylinder Oil return loop of a hydraulic cylinder

1998-05-27

1999-09-07

Nguyen, Hoang

Power plants

Pressure fluid source and motor

Ram driven by fluid pumped from reservoir

92162R, 92164, F16D 3102

Patent

active

059469129

ABSTRACT:
An oil return loop of a hydraulic cylinder which includes a plurality of equiangularly spaced V-shaped oil return grooves at the inside wall of an inner cylinder of the hydraulic cylinder for guiding saturated hydraulic oil to the outer cylinder of the hydraulic cylinder when the piston rod of the hydraulic cylinder is extended out. Each of V-shaped oil return grooves has two smoothly arched chamfered edges respectively disposed at connecting areas between the V-shaped oil return grooves and the inside wall of the inner cylinder to facilitate movement of the oil seal ring of the piston of the piston rod over the oil return loop.

REFERENCES:
patent: 2453350 (1948-11-01), Stegeman
patent: 2761425 (1956-09-01), Bertsch et al.
patent: 3567240 (1971-03-01), Brassington
patent: 3818805 (1974-06-01), Johansson

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