Friction spring release mechanism

Details Friction spring release mechanism Friction spring release mechanism

2006-02-15

2010-10-26

Bates, Zakiya W. (Department: 3676)

Wells

Processes

Disassembling well part

C166S075140, C166S083100, C166S085500, C166S302000, C166S376000, C166S381000

Reexamination Certificate

active

07819198

ABSTRACT:
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.

REFERENCES:
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patent: 5511576 (1996-04-01), Borland
patent: 6382234 (2002-05-01), Birckhead et al.
patent: 7114697 (2006-10-01), Millet et al.

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