Cutlery – Holders for detachable blades – Sliding-blade assembly
Patent
1975-11-12
1976-08-31
Smith, Al Lawrence
Cutlery
Holders for detachable blades
Sliding-blade assembly
279 51, 294100, B26B 100
Patent
active
039770796
ABSTRACT:
A knife having an easily removable blade has an elongated tubular housing having front and rear ends. An elongated stem is proportioned to fit slidably in the housing, the stem widening circumferentially in tapered fashion at the front end of the housing to define a blade-holding chuck having a blade-holding slot. The chuck is circumferentially proportioned to be compressed within the housing when the stem is slid rearwardly so as to contract the width of the slot to a blade-grasping width. A toggle lever is pivotally mounted on the stem at the rear end of the housing, the lever having a beveled edge opposing the rear edge of the housing and adapted, when the toggle lever is pivotally urged to a position essentially colinear with the housing, to contact said rear edge and forcibly slide the stem rearwardly in the housing so as to contract the blade-receiving slot. When the toggle lever is at an angle with respect to the housing, the stem is allowed to slide frontwardly in the housing so as to permit expansion of the slot to a blade-receiving width. In a preferred embodiment the rear end of the stem is ball-shaped and the toggle lever is mounted on the ball-shaped end and pivots thereon. In this embodiment the toggle lever and the ball-shaped end have aligned bores therethrough, and a pin extends through the bores for retaining the toggle lever on the stem and allowing the pivoting motion of the lever. The stem is formed of two threaded portions to facilitate assembly and adjustment of the knife.
REFERENCES:
patent: 1951393 (1934-03-01), Castroviejo
patent: 2599174 (1952-06-01), Hauser
patent: 2619724 (1952-12-01), Manthey
patent: 2940289 (1960-06-01), Hellwig
patent: 3055671 (1962-09-01), Lewis et al.
patent: 3549159 (1970-12-01), Kroener
CBS Inc.
Olson Spencer E.
Peters J. C.
Smith Al Lawrence
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