Removal tool for tangless, helically coiled insert

Details Removal tool for tangless, helically coiled insert Removal tool for tangless, helically coiled insert

1984-02-21

1985-11-19

Jones, Jr., James L.

Metal working

Means to assemble or disassemble

By rotation of work part

81443, 81450, B23P 1904

Patent

active

045533032

ABSTRACT:
A removal tool for a tangless helically coiled wire insert of the type used for tapped holes in parent material that is generally softer than a fastener being screwed into the tapped hole, whereby a mandrel having a threaded lead portion and a pivotable pawl inserted in a groove below the threaded portion so that the pawl engages a recess of the trailing end of the insert, in order that the insert may be extracted from the tapped hole. The pivotable pawl is automatically disengaged from the insert when the mandrel is pulled back, allowing the mandrel to free spin out of the tangless insert.

REFERENCES:
patent: 1277624 (1918-09-01), Matula
patent: 1627301 (1927-05-01), Wood
patent: 1676775 (1928-07-01), Doherty
patent: 2227466 (1941-01-01), Runge
patent: 2408887 (1946-10-01), Schriner
patent: 3579793 (1971-05-01), Williams

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