Press cushion

Details Press cushion Press cushion

1977-04-15

1978-09-05

Combs, E. M.

Metal deforming

By use of closed-die and coacting work-forcer

Cup or shell drawing

72361, 72465, 267119, B21D 2222

Patent

active

041110307

ABSTRACT:
An improved press cushion includes a piston which is disposed within a cylinder chamber. The head end of the cylinder chamber is arranged for communication with a compressed fluid, such as nitrogen gas. The rod end of the cylinder chamber is arranged for communication with a source of air which is free of contaminants found in the immediate environment of the cylinder assembly. Although clean air could be obtained from the atmosphere at a location spaced from the press, the rod end of the cylinder is advantageously connected to a low pressure supply of clean air.

REFERENCES:
patent: 2322440 (1943-06-01), Highberg et al.
patent: 2420626 (1947-05-01), Stevenson
patent: 2536565 (1951-01-01), Ostergren
patent: 2568092 (1951-09-01), Sloan et al.
patent: 2987046 (1961-06-01), Atherton
patent: 3013791 (1961-12-01), Gold et al.
patent: 3019739 (1962-02-01), Prosser
patent: 3101194 (1963-08-01), Hennells
patent: 3157095 (1964-11-01), Heiser
patent: 3267677 (1966-08-01), Bollar
patent: 3375001 (1968-03-01), Hennells
patent: 3380350 (1968-04-01), Stewert
patent: 3490757 (1970-01-01), Haanes
patent: 3914978 (1975-10-01), Sekanina et al.

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