Hand tools

Cutlery – Cutting tools – Plural cooperating blades

Patent

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Details

30249, B26B 1500

Patent

active

058946675

ABSTRACT:
A hand tool of a type where relative movement between operative elements is required. The hand tool includes a handpiece (C) and a separate fluid displacement device (P) which are coupled together by a flexible hose (H). The handpiece (C) has a fixed blade (36) and a movable blade (34). The displacement unit (P) has a handle (10) which can be moved relative to a ground engageable foot (18) thereby causing a piston (16) to displace fluid along the hose (H) and drive a piston (28) in handpiece (C) against the bias of a spring (38). Movement of piston (28) against the spring (38) causes cutting blade (34) to move toward blade (36). Spring (38) causes reverse movement of piston (28) upon pressure being released from the handle (10) to retract blade (34) from blade (36). The blades (34) and (36) can be replaced by other operative elments such as clamping jaws.

REFERENCES:
patent: 2504405 (1950-04-01), Fletcher
patent: 2600540 (1952-06-01), Johnson
patent: 2927373 (1960-03-01), Taube
patent: 3039189 (1962-06-01), McBerty
patent: 3670411 (1972-06-01), Peters
patent: 3834215 (1974-09-01), Lemley
patent: 5134776 (1992-08-01), Moody
patent: 5341572 (1994-08-01), Michelson
"Hydraulic Handbook", Trade and Technical Press Limited of England, 6th Edition, pp. 122-123 and 436-440.

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