US 5,502,896 AGranted

Cutter knife

AssigneeSDI Corporation

InventorJau Liang Chen

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Abstract

A cutter knife with a detachable blade includes an elongated case slidably receiving a control member which has a blade held thereon in a partial top-opening through space defined in an upper portion thereof and enclosed by an end cap at a tail end thereof. The cutter knife further has a retaining element adapted to hold blades thereon and slidably received in a space defined in a lower portion of the case. The control member includes a spring biased button movably coupled to the base, a resilient latch element on a lateral side thereof for resiliently engaging with a saw-teeth formation formed on the case to serve as an auxiliary locking device, and a spring biased locking element movably retained in the base and actuated by the button to selectively engage with teeth of the saw-teeth formation formed in the case and thereby locking the control member and the blade at a desired position.

Claims5

Dependent claims

A cutter knife with detachable blades comprising:

an elongated case having a first space axially defined in a lower portion thereof with an opening open to first end thereof;
a second space axially defined through an upper portion thereof and in communication with the first space;
a sliding groove defined in a top face thereof and in communication with the second space;
and a generally U-shaped guiding element fixedly retained in the second space and having a saw-teeth formation axially constructed along an inward extending flange protruding from a respective vertical wall of the U-shaped guiding element;
a control member slidably received in the guiding element and comprising a holding element formed on a base thereof to hold a blade thereon, a spring biased button movably coupled to the base, and a spring biased locking element movably retained in the base and actuated by the button to selectively engage with the teeth of the saw-teeth formation and thereby lock the control member and the blade at a desired position;
and
an end cap removably coupled to the case at the first end of the case.

4 more elements

Dependencies are inferred from the claim text.