Quick release mechanism for the tool of a concrete/asphalt abrad

Details Quick release mechanism for the tool of a concrete/asphalt abrad Quick release mechanism for the tool of a concrete/asphalt abrad

1989-10-16

1990-09-04

Rose, Robert A.

Stone working

Sawing

Rotary

51176, 51177, 299 39, B28D 100, B24B 2302

Patent

active

049535234

ABSTRACT:
A quick release mechanism for disengaging the cutting blade of a masonry saw is disclosed. Rotation of a threaded shaft to achieve axial movement through a closed partially threaded split collar lowers the cutting tool onto the work surface via a counterpivot mechanism which simultaneously compresses a gas spring. Only one half of the collar has threads complementary to those of the threaded shaft and pivots away from an opposing fixed unthreaded collar portion. Upon actuation of a release device, the threaded portion of the split collar pivots to an open position to disengage the threaded shaft whereby reverse axial movement of the threaded shaft and resultant upward disengagement of the cutting tool occur as the gas spring decompresses.

REFERENCES:
patent: 2031665 (1936-02-01), Myers
patent: 2277236 (1942-03-01), Kneisley et al.
patent: 2673725 (1954-03-01), Coates
patent: 3156231 (1964-11-01), Harding, Jr.
patent: 3301601 (1967-01-01), Zuzelo
patent: 3357745 (1967-12-01), Cooper
patent: 3387891 (1968-06-01), Simms et al.

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