Motors: expansible chamber type – Relatively movable working members with one having motive...
Patent
1996-05-24
1997-11-04
Nguyen, Hoang
Motors: expansible chamber type
Relatively movable working members with one having motive...
91534, 92 62, 92 63, F01B 100, F01B 700
Patent
active
056828063
ABSTRACT:
Pressure medium pliers for clamping rings, comprising a pressure medium connection and a pressure medium valve connected thereto, at least one piston controlled by the pressure medium valve, a traverse member drivable by the piston and pivoted pliers members at the inner lever ends of which the traverse member engages for pivoting them, the pressure medium valve having a valve pin which is shiftable in traverse direction of the movement of the piston and operatable by a release trigger, the valve pin blocking the connection of the piston with the pressure medium connection and connecting it with a lower pressure level in a rest position and blocking the connection of the piston with the lower pressure level and connecting it with the pressure medium connection in a working position being reachable by operation of the release trigger, a switching bar which is held in a slideway movable in the direction of the piston and which is mechanically biased by a spring towards the valve pin, the switching bar having a cam and a piston having a stop for engaging the switching bar in the last part of its movement, and the valve pin having a locking seat into which the switching bar snaps under action of the spring at movement of the valve pin from the rest into the working position and which the switching bar releases at its engagement by the piston.
REFERENCES:
patent: 3288036 (1966-11-01), Fisher
patent: 3511048 (1970-05-01), Nemetz
patent: 3978884 (1976-09-01), Sundstrom
patent: 4024794 (1977-05-01), Grubb
patent: 5191825 (1993-03-01), Beneteau et al.
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