Pneumatic spring

Details Pneumatic spring Pneumatic spring

1995-10-10

1997-08-26

Oberleitner, Robert J.

Spring devices

Fluid

Expansible-contractible chamber device

267137, 267119, 72351, F16F 918, B21D 2614

Patent

active

056603797

ABSTRACT:
A pneumatic spring for damping movement of a machine part having a guide shaft for performing a stroke. The spring includes a housing containing gas. The housing is formed as a stationary body with a central opening adapted to accommodate the guide shaft. Several cylindrical bores are formed within the stationary body. A piston is peripherally guided within each cylindrical bore. Each piston has a center point located on a circle which is concentrically oriented with the central opening. The pistons contact the machine part with an upper support end so that all the pistons jointly perform a stroke with the machine part. Alternatively, the cylindrical bores are. selectively equipped with sealing disks instead of pistons, to adjust the resistance force characteristic of the spring.

REFERENCES:
patent: 2976930 (1961-03-01), Marquis et al.
patent: 2989019 (1961-06-01), Van Scriver
patent: 3160111 (1964-12-01), Berry
patent: 3256782 (1966-06-01), Ebert
patent: 3636749 (1972-01-01), Heiser
patent: 4039176 (1977-08-01), Jansen
patent: 4699043 (1987-10-01), Dionigi
patent: 4934230 (1990-06-01), Wallis
patent: 5129635 (1992-07-01), Holley
patent: 5167181 (1992-12-01), Lee
patent: 5431087 (1995-07-01), Kambara

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