Shock absorber for bumpers

Details Shock absorber for bumpers Shock absorber for bumpers

1975-05-30

1977-06-14

Tollberg, Stanley H.

Spring devices

Fluid

Bumper

267 64R, F16F 500

Patent

active

040293068

ABSTRACT:
A shock absorber for bumpers comprising an inner cylinder having means at the front end for fitting the shock absorber to a bumper and the base part being slidably engaged in an outer cylinder having means for fitting it to a car frame; a high pressure gas enclosed between a free piston fitted in the inner cylinder and the front end of the inner cylinder; oil contained between the free piston and the botton surface of the outer cylinder so that no air gap produced, a tubular column fitted at its base end to the botton surface of the outer cylinder and provided with a plurality of side-by-side damping force generating holes, the front end being flexible engaged to the base end of the inner cylinder, and a plate-shaped valve slidably fitted on the tubular column is, opposed to the base end surface of the inner cylinder.
Such shock absorber is assembled by fitting an O-ring to the base end of the tubular column and enclosing the high pressure gas so that the free piston may be pressed into contact with a stopper on the inside surface of the inner cylinder, fitting the tubular column to the base end of the inner cylinder, inserting said tubular column at the base end into a hole on the bottom surface of the outer cylinder from the inside of the outer cylinder, pouring the oil into the inner cylinder and outer cylinder while the above mentioned O-ring is in contact with the bottom surface of the outer cylinder so that no air gap may be produced and then pressing the inner cylinder to compress the high pressure gas so that the O-ring may be moved into a hole on the bottom surface of the outer cylinder to fix the tubular column to the outer cylinder and slightly separate the free piston from the stopper.

REFERENCES:
patent: 2348160 (1944-05-01), Thornhill
patent: 2494280 (1961-08-01), Daffin
patent: 2790659 (1957-04-01), Malone et al.
patent: 2878045 (1959-03-01), Allinquant
patent: 2963175 (1960-12-01), Thornhill
patent: 3412870 (1968-11-01), Rollins
patent: 3554387 (1971-01-01), Thornhill
patent: 3736645 (1973-06-01), Fannin et al.
patent: 3797615 (1974-03-01), Stembridge
patent: 3799589 (1974-03-01), Boelkins
patent: 3804443 (1974-04-01), Kamatsu
patent: 3806105 (1974-04-01), Konishi et al.
patent: 3820772 (1974-06-01), Kerr et al.
patent: 3853311 (1974-12-01), Kreuzer et al.
patent: 3944198 (1976-03-01), Sakamoto

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