Razor knife with autoretracting blade

Details Razor knife with autoretracting blade Razor knife with autoretracting blade

1994-03-18

1995-01-31

Seidel, Richard K.

Cutlery

Sheathed

Sliding blade

030161, B26B 108

Patent

active

053849639

ABSTRACT:
A knife has a hollow body, a blade movable longitudinally on the body between an extended position projecting from the body and a retracted position substantially wholly contained within the body, a biasing element engaged between the body and the blade for urging the blade into the retracted position. A latch device is transversely engageable with the body in a latched position for holding the blade in the extended position and is out of engagement with the body in a release position permitting the biasing element to draw the blade into the retracted position. An electronic circuit in the body including a microelectronic accelerometer generates an output when the body is subjected to an acceleration exceeding a predetermined acceleration threshold. An actuator between the circuit and the latch puts the latch means in the release position when the detector generates the output.

REFERENCES:
patent: 4769912 (1988-09-01), Davis
patent: 4949458 (1990-08-01), Davis et al.
patent: 5203085 (1993-04-01), Berns

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