Hydraulic secateurs

Details Hydraulic secateurs Hydraulic secateurs

1976-12-14

1978-08-29

Watson, Robert C.

Cutlery

Cutting tools

Plural cooperating blades

30249, B26B 1500

Patent

active

041093810

ABSTRACT:
A hydraulic secateurs has two blades at least one of which is a movable blade operated by a hydraulic device including a drive piston controlled by the movable blade and mounted for sliding with play in a longitudinal bore formed in a handle for the secateurs, and a hydraulic distributor controlling the movements of the piston and including a distributing slide valve moving in a cylindrical jacket positioned to the rear of the drive piston and perpendicularly to its axis. The improvement is that the jacket is provided with spaced peripheral grooves into which there open radial apertures in its side wall, one of the peripheral grooves being positioned in permanent communication with an aperture communicating with the bore in which the piston moves, and capable of being put into communication, according to the position of the distributing slide valve, either with the groove which is in constant communication with the intake of hydraulic fluid under pressure, or with the groove permanently communicating with the return aperture for said fluid.

REFERENCES:
patent: 2733506 (1956-02-01), Wild
patent: 3476015 (1969-11-01), Ackley

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