Shock-absorbing fluid-actuated pressure system

Details Shock-absorbing fluid-actuated pressure system Shock-absorbing fluid-actuated pressure system

1989-07-31

1990-10-23

Jones, David

Metal deforming

With means to drive tool

Including pneumatic- or fluid-actuated tool support

723912, 91405, 92856, B21J 1522

Patent

active

049642928

ABSTRACT:
A push-pull tool for setting multi-piece fasteners includes a piston that is movable back and forth within a cylinder in response to fluid forces on opposite faces of the piston. One of the fluids is an air-oil foam mixture that acts essentially as an incompressible liquid force-transmitter, while being somewhat compressible so as to absorb shock loadings associated with rapid piston movements. A check valve is included in the system to admit atmospheric air into the air-oil foam mixture, to thereby partially compensate for oil leakage that might inadvertently take place across the piston seals.

REFERENCES:
patent: 4580435 (1986-04-01), Port et al.
patent: 4597263 (1986-07-01), Corbett
patent: 4878372 (1989-11-01), Port et al.

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