Opening and closing assisting mechansim for folding knife
AssigneeKai U.S.A., Ltd.
InventorKenneth J. Onion
Life of this patent
Estimating the term…
Abstract
This invention relates to a mechanism in a folding knife that urges the blade to move to an open and alternatively to a closed position. The knife generally cnsists of a blade member having a tang extending outwardly from the blade; a handle having at least one recessed portion; a bar pivotally connecting the tang and the handle; and a bias element engaging the blade wherein the bias element is housed within the recessed portion of the handle. Generally, in the present invention, the blade must be moved manually a certain distance whereupon the mechanism serves to complete the movement of the blade without the application of further outside force by the user.
Claims34
A folding knife, comprising:
- a blade having a tang extending outwardly from said blade;
- a handle having at least one recessed portion;
- a bar pivotally connecting said tang and said handle;
- and
- a bias element engaging said blade wherein said bias element is housed within said recessed portion of said handle such that said bias element is substantially to one side of a plane defined by said blade and assists movement of said blade to an open position.
A pocket knife comprising:
- a handle defining a blade-receiving channel;
- a blade pivotally mounted to the handle about a tang end of the blade so that the blade may be at least partially stored in the channel in a closed position and pivoted out of the channel to an open position;
- and
- a spring formed from a wire having three primary bends, one bend forming a tang end of the spring, and another bend forming a handle end of the spring;
- wherein the spring is operatively connected between the handle and the blade such that the spring exerts a pivoting force on the blade.
A pocket knife comprising:
- a handle defining a blade-receiving channel;
- a blade pivotally mounted to the handle about a tang end of the blade so that the blade may be stored in a closed position at least partially in the channel and pivoted out of the channel to an open position, defining a plane of the blade within which the blade pivots;
- and
- a substantially planar spring held within the handle at a location substantially to one side of the plane within which the blade pivots, the spring being operatively connected between the handle and the blade such that the spring exerts a pivoting force on the blade.
A pocket knife comprising:
- a blade having a tang about which the blade may pivot, where the blade is configured so that it defines a plane when pivoted about the tang;
- a handle to which the tang of the blade is pivotally mounted, including a spring-receiving cavity within the handle and offset to one side of the plane defined by the blade;
- and
- a spring disposed within the spring-receiving cavity and operatively connected between the handle and the blade such that the spring exerts a pivoting force on the blade as the blade is moved from a closed position to an open position, or from the open position to the closed position.
A pocket knife having a blade mounted in a channel of a handle, pivoting about a tang of the blade, relative to the handle, and a mechanism for assisting the opening of the blade, said knife comprising:
- a hole formed in the tang of the blade;
- a hole formed in the handle;
- and
- a wire bent and held within the hole in the handle and the hole in the blade to be under compression between the hole in the blade and the hole in the handle for at least a portion of travel of the blade between an open position and a closed position of the blade relative to the handle.
Dependencies are inferred from the claim text.