Hydraulic emergency hand tools

Details Hydraulic emergency hand tools Hydraulic emergency hand tools

1978-06-20

1979-10-23

Geoghegan, Edgar W.

Power plants

Pressure fluid source and motor

Ram driven by fluid pumped from reservoir

60478, 60481, 30180, F15B 1518

Patent

active

041716167

ABSTRACT:
The specification discloses a hydraulic pressure operated emergency hand tool of the type in which manual pressure exerted on an all position small-area pump piston creates a hydraulic pressure which is communicated to a power cylinder for activating a plural jaw tool member, such as a pair of cutter blades. The jaw members are pivoted together intermediate their ends and one end of each is pivotally connected one to the power cylinder opposite the free end of the piston and the other to the free end of the piston. A release valve provides instant return displacement of hydraulic medium via a by-pass communication from the cylinder to the reservoir to relieve the activating pressure on the cutter blade and restore it promptly to normal position. Interchangeable tool members are provided.

REFERENCES:
patent: 2584431 (1952-02-01), Dearsley
patent: 3058214 (1962-10-01), Mekler
patent: 3819153 (1974-06-01), Hurst et al.

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