Method of installing annular seal for coaxial tubular member

Metal working – Method of mechanical manufacture – Assembling or joining

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Details

29453, 29235, B23P 1102

Patent

active

039745589

ABSTRACT:
This upstroke-cushioning expansible strut consists of a spring-pressed hollow upper inner arm having on its lower end a piston head reciprocable within a roughly cylindrical hollow lower outer arm, the former being pivoted to an automobile rear hatch while the latter is pivoted to the lower part of the automobile body. Mounted between the lower arm and the upper arm is an elongated hollow spool-shaped internal seal which also guides the upper arm as it is propelled upward by the lifting force applied by the operator, assisted by internal springs. The air is allowed to escape gradually through bleed orifices until the upper arm nears its fully extended position, whereupon the release of the air is halted by the covering up of the orifices by the internal seal when said orifices reach said seal, thereby cushioning the impact which would otherwise occur between the piston head on the lower end of the upper inner arm and the upper end of the lower outer arm. The internal seal also acts as a resilient stop.

REFERENCES:
patent: 1484610 (1924-02-01), Myers
patent: 2625415 (1953-01-01), Smith
patent: 2687831 (1954-08-01), Miller
patent: 2889964 (1959-06-01), Cooprider
patent: 3413021 (1968-11-01), Potts

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