Crack-proof structure of the nail pulling groove of a hammer

Details Crack-proof structure of the nail pulling groove of a hammer Crack-proof structure of the nail pulling groove of a hammer

1999-07-08

2000-08-01

Scherbel, David A.

Implements or apparatus for applying pushing or pulling force

Nail extractor type

Hammer and anvil

254 26R, 254 8, 81 22, B25C 1100

Patent

active

060954973

ABSTRACT:
A crack-proof structure of the nail pulling groove of a hammer used in a hammer with a nail pulling groove at rear end thereof is disclosed, a V shape nail pulling groove is formed on the meddle portion of the distal end. The lower portion of the nail pulling groove of the hammer has a penetrating round hole. A cylindrical rubber plug is inserted in the round hole for preventing concentration of stress forces or dispersing stress force. Thereby, the inner stress due to the impact of the hammer is absorbed by the rubber plug. Therefore, the nail pulling groove is prevented to crack as the hammer serves to knock a nail or an object.

REFERENCES:
patent: 368516 (1887-08-01), Cooper et al.
patent: 429508 (1890-06-01), Crane
patent: 6016722 (2000-01-01), Gierer et al.

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