Leverage hammer

Details Leverage hammer Leverage hammer

2006-05-30

2006-05-30

Watson, Robert C. (Department: 3723)

Implements or apparatus for applying pushing or pulling force

Nail extractor type

Single throw lever

Reexamination Certificate

active

07051998

ABSTRACT:
A selectively operable extendable fulcrum device is described. The device includes a casing with a slot to selectively guide and lock a selectively telescoping rod into place when extended. A ridge on the inside of the casing provides a resting place for a compression spring. The compression spring is operable to selectively retract the telescoping rod back into its retracted position and keeps the telescoping rod and fulcrum head assembly securely in place when retracted. The fulcrum head provides added leverage needed to pull out nails from materials when it is retracted as well as providing added leverage for longer nails when the fulcrum head is extended. The casing and the associated components of the device can be press fit into any conventional hammer head member.

REFERENCES:
patent: 540967 (1895-06-01), Eveleth
patent: 856097 (1907-06-01), Palmer
patent: 2589046 (1952-03-01), Brown et al.
patent: 2589047 (1952-03-01), Brown et al.
patent: 2741456 (1956-04-01), Williams
patent: 4998996 (1991-03-01), Belanger
patent: 5441236 (1995-08-01), Kiernan
European International Search Report for EP 04 25 6756, Apr. 4, 2005, 9 pages.

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