Clamping apparatus

Details Clamping apparatus Clamping apparatus

1992-04-03

1993-01-26

Swann, J. J.

Work holders

With fluid means

Plural positioning means sequentially operated

269 25, 269 30, 269137, 269138, B23Q 308

Patent

active

051817004

ABSTRACT:
A clamping first piston (11) is inserted into a locking second piston (17) inserted into a cylinder bore (9) of a housing (4). A clamping member (7) is fixedly secured to the left portion of the first piston (11). A clamping first actuation chamber (21) is formed on the right side of both those pistons (11)(17), and an enclamping second actuation chamber (25) is formed on the left siede of the second piston (17). A wedgy space (30) is formed between the outer circumferential surface of the first piston (11) and the cylinder bore (9). A locking wedge (31) is inserted into the wedgy space (30) from right side and an unlocking engaging portion (34) is opposed to an unlocking engaged portion (33) of the first piston (11) from left side, so that these wedge (31) and the engaging portion (34) are fixedly secured to the second piston (17).

REFERENCES:
patent: 3512794 (1970-05-01), Lohman
patent: 3595112 (1971-07-01), DeGeorse
patent: 3700227 (1972-10-01), Sessody
patent: 4365792 (1982-12-01), Johns
patent: 4932640 (1990-06-01), Shirakawa
patent: 5071109 (1991-12-01), Yonezawa
patent: 5108079 (1992-04-01), Yonezawa et al.

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