Spring devices – Fluid – Expansible-contractible chamber device
Patent
1993-12-08
1995-02-07
Butler, Douglas C.
Spring devices
Fluid
Expansible-contractible chamber device
267 6428, 267130, F16F 902, F16F 934
Patent
active
053869753
ABSTRACT:
A gas cylinder for use in die systems for forming lightweight parts. In one form, the cylinder forms a self contained gas spring which is interchangeable with a coil spring that is constructed such that it is not adversely affected by the deleterious effects of oil and other contaminants. The gas cylinder comprises a one-piece cylindrical upper body having a base wall and a peripheral wall and a hollow rod extending upwardly into the cylindrical body such that the upper body completely encircles and encloses the upper end of the rod. The rod has a base having an outer diameter greater than the diameter of the rod. The peripheral wall of the cylinder and the outer diameter of the base have substantially the same diameter such that the cylinder can be positioned in a recess of a press or die in place of a coil spring. The cylindrical body and rod include interengaging portions limiting axially outwardly movement of the cylinder relative to the rod. In one form, the cylinder further includes a charging valve in the base of the rod through which gas may be introduced for charging the space between the cylinder and the rod and a pressure relief rupture disk in the base wall of the cylindrical body. In another form, the opening in the hollow rod is exposed and the base is formed with an axial projection that is threaded for engagement into a manifold or valve block used in the die system.
REFERENCES:
patent: 3101194 (1963-08-01), Hennells, Sr.
patent: 3428303 (1969-02-01), Lynch
patent: 4528838 (1985-07-01), Wallis
patent: 4529181 (1985-07-01), Wallis
patent: 4572489 (1986-02-01), Wallis
patent: 4583722 (1986-04-01), Wallis
patent: 4585215 (1986-04-01), Kramer
patent: 4628796 (1986-12-01), Wallis
patent: 4741518 (1988-05-01), Wallis
patent: 4742997 (1988-05-01), Wallis
patent: 4765227 (1988-08-01), Balazs et al.
patent: 4813655 (1989-03-01), Hennells
patent: 4838527 (1989-06-01), Holley
patent: 4844429 (1989-07-01), Ecktman
patent: 5088698 (1992-02-01), Wallis
patent: 5172892 (1992-12-01), Wallis
patent: 5197718 (1993-03-01), Wallis
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