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Title:
DAMAGED BOLT AND SCREW REMOVING DEVICES
Document Type and Number:
WIPO Patent Application WO2004096471
Kind Code:
A3
Abstract:
A bit for removing a broken fastener comprises a tip from which extend two or more notches separated by scraping surfaces formed from two-sided frusto-conically-­shaped regions. The scraping surfaces are bounded on one side by a cutting edge and on the other side by a non-cutting edge and are configured to cut into the fastener when the bit is rotated in a direction opposite to the fastener's direction of engagement. Specific embodiments include configurations where the cutting edges extend at different angles with respect to the bit axis and where the scraping surfaces comprise a plurality of serrations.

Inventors:
KOZAK BURTON (US)
KOZAK IRA (US)
Application Number:
PCT/US2004/012647
Publication Date:
June 09, 2005
Filing Date:
April 23, 2004
Export Citation:
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Assignee:
KOZAK BURTON (US)
KOZAK IRA (US)
International Classes:
B23B51/00; B23B51/10; B25B27/18; (IPC1-7): B25B13/50
Foreign References:
US4189266A1980-02-19
US4682917A1987-07-28
Other References:
See also references of EP 1633532A4
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