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Cantilever spring assist knife

A technology of knives and appliances, applied in the field of folding knives with button locks, can solve the problems of increasing the cost and complexity of folding knives

Active Publication Date: 2012-12-05
OY FISKARS AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding additional features increases the cost and complexity of the folding tool
For folding knives intended to be sold at modest prices, cost considerations may outweigh the desire for additional features

Method used

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  • Cantilever spring assist knife
  • Cantilever spring assist knife
  • Cantilever spring assist knife

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0045] According to an exemplary embodiment, the spring 30 applies an opening force to the blade 14 once the blade 14 is manually opened to a position approximately 30 degrees from the fully closed position. The degree to which the blade 14 must be manually opened before receiving the assistance of the spring 30 can be varied by varying the contoured surface of the tang 50 to achieve the desired effect.

[0046] refer to Figure 15 , the spring 30 moves further along the contoured surface 56 of the tang 50 toward the end 57 and is approaching a position where the second end 34 is no longer in contact with the tang 50 of the blade 14 . Ideally, the spring 30 is configured to move the blade 14 from Figure 15 The location in the drive to Figure 16 fully open position without further manual assistance or intervention from the user. In other words, the resulting from the tang 50 of the blade 14 Figure 14 starts at the location shown and continues until Figure 15 The force ...

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PUM

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Abstract

A folding tool includes a handle and an implement pivotally coupled to the handle. The implement is adapted to travel between a closed position and an open position. The implement includes a tang having a contoured surface. The folding tool also includes a locking device movable between a locked position and an unlocked position along an axis that is transverse to a plane defined by the implement. The folding tool further includes a cantilever spring having a first end coupled to the handle and a second end adapted to interact with the tang of the implement. The spring exerts a closing force on the implement when the blade is in a closed position. The spring exerts an opening force on the implement during at least a portion of the travel of the implement between the closed position and the open position.

Description

technical field [0001] The present invention relates to folding knives, and more particularly, the present invention relates to folding knives having cantilevered springs to assist the user in opening the knives and push button-like locks to lock the knives in the open position. Background technique [0002] Folding knives generally include a handle and one or more blades pivotally connected to the handle, the blades having a compact closed position and an extended open position. In order to make the knife more useful and easier to handle, some additional features are added to the folding knife. The features may include a mechanism for assisting the user in opening the knife, a mechanism for locking the blade in the open position, and a mechanism for biasing the blade in the closed position. Adding additional features increases the cost and complexity of the folding tool. For folding knives intended to be sold at modest prices, cost considerations may outweigh the desire f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B26B1/04B26B1/06B26B1/10
CPCB26B1/046
Inventor 杰夫・弗里曼
Owner OY FISKARS AB
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