Friction spring release mechanism

F - Mech Eng,Light,Heat,Weapons – 16 – H

Patent

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Details

F16H 33/20 (2006.01) E21B 23/00 (2006.01) E21B 23/06 (2006.01) E21B 34/06 (2006.01) F16B 2/06 (2006.01) F16F 1/46 (2006.01)

Patent

CA 2641208

A one-shot thermally activated release mechanism, the release mechanism including a spiral or helically wound spring wrapped around a set of jaws in a manner that prevents the jaws from expanding; held in this tightened position by two wires, with one wire fixed to the body of a member of the jaws and the second wire attached to the spring, the wires bonded together by a solder or other fusible material. The jaws restrict the movement of a plunger. Heating the solder causes release of the spring and enables expansion of the jaws, allowing movement of the plunger. A bias force on the plunger assists in movement of the plunger past the expanding jaws.

La présente invention concerne un mécanisme de libération activé thermiquement en un coup, comprenant un ressort enroulé en spirale ou en hélice autour d'un ensemble de mâchoires d'une manière qui évite aux mâchoires de s'étendre ; il est maintenu dans cette position serrée par deux fils, l'un fixé au corps d'un élément des mâchoires, l'autre est attaché au ressort. Les fils sont liés ensemble par une soudure ou un autre matériau de fusible. Les mâchoires limitent le mouvement d'un piston. Le chauffage de la soudure amène à la libération du ressort et permet l'expansion des mâchoires, ce qui permet le mouvement du piston. Une force de dérivation appliquée sur le piston aide le mouvement du piston après les mâchoires en expansion.

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