Nitrogen die cylinder

Details Nitrogen die cylinder Nitrogen die cylinder

1984-05-17

1986-04-22

Stoner, Jr., Bruce H.

Spring devices

Fluid

Expansible-contractible chamber device

267130, 277 27, 277110, 277165, 277205, F16F 902, F16J 1532

Patent

active

045837228

ABSTRACT:
There is disclosed a piston-cylinder assembly for use as a die spring wherein one end of the cylinder is connected to the source of nitrogen at high pressure to bias the piston outwardly through the opposite open end of the cylinder. The open end of the cylinder is provided with a high pressure seal and the opposite end of the piston is likewise provided with a high pressure seal. An annular chamber of relatively small cross sectional area is provided between the piston and the cylinder. A valve stem on the piston controls a passageway communicating with the annular chamber. Axial pressure is applied to the seal on the cylinder to produce firm sealing engagement with the piston by pressurizing the annular chamber or by arranging a compression spring between the seal and a shoulder on the cylinder.

REFERENCES:
patent: 3079897 (1963-03-01), Kirsch
patent: 3577833 (1971-05-01), Skelton
patent: 3947005 (1976-03-01), Wallis
patent: 4342448 (1982-08-01), Wallis

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