Security cutter

Details Security cutter Security cutter

1999-09-08

2001-07-17

Bray, W. Donald (Department: 3725)

Cutting

Means to drive or to guide tool

Tool displaceable to inactive position

C030S160000

Reexamination Certificate

active

06260461

ABSTRACT:

The present invention relates to a security cutter that can be used to enable a person who has his hands tied together to free himself.
BACKGROUND OF THE INVENTION
In the case of burglary, the occupant in the premises concerned will usually be overcome and then tied up by the burglar. After the burglar has left, it would usually take some time before the restrained person can, if possible, struggle free or find a cutter to free himself before he can call the police.
The invention seeks to provide a security cutter that is readily available for such use.
SUMMARY OF THE INVENTION
According to the invention, there is provided a security cutter comprising a body for fixing onto a support, a cutting member supported by the body for movement between a normal position substantially wholly within the body and an operating position extending out from the body, resilient means urging the cutting member towards the operating position, and a releasable lock for locking the cutting member in the normal position.
Preferably, the body has a slot through which the cutting member is movable between the two positions.
In a preferred construction, the cutting member is pivotably connected to the body.
More preferably, the cutting member has a cutting edge which is arranged, in the operating position, to face upwards and be inclined from the body.
In a preferred embodiment, the cutting member is in the form of a saw blade.
More preferably, the saw blade has a series of teeth facing towards the body.
It is preferred that the cutting member has a lower end connected to the body and an upper end for engagement by the lock.
It is further preferred that the resilient means is in the form of a spring co-acting between the lower end of the cutting member and the body.
Preferably, a damper is provided between the lower end of the cutting member and the body for acting against the action of the resilient means.
More p referably, the lower end of the cutting member is toothed, and the damper comprises a gearwheel in mesh with said lower end.
In a preferred embodiment, the lock is in the form of a spring-loaded latch.
More preferably, the latch incorporates a press-knob for operation.


REFERENCES:
patent: 1527835 (1925-02-01), Burke
patent: 1795394 (1931-03-01), Hirsch
patent: 2199430 (1940-05-01), Greve
patent: 2304601 (1942-12-01), Schrade
patent: 2488432 (1949-11-01), Paynter
patent: 4009905 (1977-03-01), Bejeannin
patent: 5097733 (1992-03-01), Benkoski
patent: 3434374 (1984-09-01), None

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