Metal deforming – With means to drive tool – Including pneumatic- or fluid-actuated tool support
Patent
1980-11-10
1982-08-03
Crosby, Gene
Metal deforming
With means to drive tool
Including pneumatic- or fluid-actuated tool support
60479, 72410, B21J 912, B21D 706
Patent
active
043422160
ABSTRACT:
A hydraulic force-delivering hand tool, such as a cable crimper, comprising a body with a large axial bore at one end forming a cylinder. A piston is slidable in the cylinder and has a nodular mass at the outer end to drive against a member to be crimped. A plunger pumps a quantity of fluid past a transfer one-way check valve and into the cylinder, to drive the piston forward a small increment each stroke. When the piston passes through its full predetermined stroke to effect a complete crimp, interengaging means on the transfer check valve and on the piston, lift the transfer check valve from its seat to prevent further travel and to relieve fluid back to the transfer chamber. A button may then be pressed to unseat a relief check valve, to relieve the cylinder to the reservoir.
REFERENCES:
patent: 2696850 (1954-12-01), Peterson
patent: 3740952 (1973-06-01), Fujii
patent: 4031619 (1977-06-01), Gregory
patent: 4086802 (1978-05-01), Ewig
patent: 4132107 (1979-01-01), Suganuma
patent: 4248077 (1981-02-01), Gregory
patent: 4263801 (1981-04-01), Gregory
Crosby Gene
Stidham Melvin R.
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