Spring clamp with clamped condition holding device

Details Spring clamp with clamped condition holding device Spring clamp with clamped condition holding device

1991-04-02

1992-03-17

Bilinsky, Z. R.

Gear cutting, milling, or planing

Milling

Cutter spindle or spindle support

408239A, 91 44, 92183, B23C 526

Patent

active

050963473

ABSTRACT:
An actuation member (B) supported by a housing (A) is actuated for clamping upwardly by means of a spring force and actuated downwardly for unclamping by means of an actuation means (D). A piston (11) is inserted into a cylinder (10) fixedly secured to the upper portion of the housing (A), and a liquid sealing chamber (12) is formed below the piston (11). The piston (11) is fixedly secured to the actuation member (B). When the actuation member (B) is held in the clamped condition, a liquid sealing valve (15) is closed so as to seal an oil (L) within the liquid sealing chamber (12). Whereby, in case that a pulling down force larger than the clamping spring force is imposed to the actuation member (B), a pressure generated within the liquid sealing chamber (12) serves to prevent the piston (11) from lowering, against the pulling down force.

REFERENCES:
patent: 3762271 (1973-10-01), Poincenot
patent: 3875848 (1975-04-01), Powell
patent: 4411568 (1983-10-01), Rohm
patent: 4735532 (1988-04-01), Hunt
patent: 4986704 (1991-01-01), Narushima et al.

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