Work holders – With fluid means – With movable diaphragm
Patent
1998-07-20
1999-09-28
Watson, Robert C.
Work holders
With fluid means
With movable diaphragm
269296, 269310, B23G 308
Patent
active
059574437
ABSTRACT:
An improved hydraulic work support (10) having a plunger (18) that is shifted between retracted and extended positions by hydraulic fluid is disclosed. The work support includes a base (12); a tubular housing (14) partially received in the base and having a central bore (40); a tubular sleeve (16) received within the central bore; a general cylindrical plunger (18) positioned at least partially within the sleeve, the plunger being movable within the bore along the longitudinal axis; and a piston cylinder assembly (20) positioned within the central bore for selectively shifting the plunger along the longitudinal axis of the bore between a lowered, retracted position and a raised, extended position under the influence of hydraulic fluid. The piston cylinder assembly includes a cylinder (94) positioned within the sleeve and having a piston chamber (96) formed therein; a piston (98) movably received within the piston chamber; and an elongated piston rod (100) having a lower end coupled with the piston and an opposite upper end extending from the cylinder and coupled with the plunger. The piston and piston rod are shifted upward in the piston chamber when fluid is delivered to a first fluid passageway (34) formed in the base to shift the plunger to its raised, extended position. The piston and piston rod are shifted downward in the piston chamber when fluid is delivered to a second fluid passageway (36) formed in the base to return the plunger to its lower, retracted position.
REFERENCES:
patent: 3542354 (1970-11-01), Fitzpatrick
patent: 3729185 (1973-04-01), Roeske
patent: 4743001 (1988-05-01), Craft
patent: 4934672 (1990-06-01), Craft
patent: 5887862 (1999-03-01), Yonezawa
Vektek, Inc.
Watson Robert C.
LandOfFree
Hydraulic work support does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydraulic work support, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic work support will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-694259