Rubber pad press

Details Rubber pad press Rubber pad press

1988-07-25

1989-05-16

Jones, David

Metal deforming

Tool and/or tool holder

Including flexible or yieldable tool or support

72 54, 72 57, B21D 2210

Patent

active

048298077

ABSTRACT:
A press frame has an upper frame member, a lower frame member, a platen having a tool mounted thereon and disposed at the lower frame member, a working piston-and-cylinder unit disposed at the upper frame member and centered on an upright axis, the piston of the working piston-and-cylinder unit being displaceable and formed with a chamber in alignment with the platen and adapted to receive the tool, an elastomeric pad disposed in the chamber for evenly distributing pressing forces acting on a workpiece on the tool upon the supply of a hydraulic medium under pressure to the piston, whereby an outward force from the chamber is applied to the piston, with means forming a ring space between the piston and cylinder of the working unit at least in part peripherally surrounding the chamber, and means for supplying the ring space with the pressurized hydraulic medium, whereby a pressing force is applied to the piston to counterbalance the outward force.

REFERENCES:
patent: 2840025 (1958-06-01), Dussling
patent: 2966873 (1961-01-01), Hoffman et al.
patent: 3120205 (1964-02-01), Pfeiffer et al.
patent: 4111024 (1978-09-01), Dahlman et al.
patent: 4162625 (1979-07-01), Simmons

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