Tools – Wrench – screwdriver – or driver therefor – Handle clutched to head
Reexamination Certificate
2005-05-03
2005-05-03
Thomas, David B. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Handle clutched to head
C081S063000
Reexamination Certificate
active
06886428
ABSTRACT:
A control mechanism for a ratchet tool includes a switch pivotably received in a chamber in the head of the tool and a pawl is received in a recess so as to be matched with a gear wheel in the head. The pawl is located at located at a mediate portion of a depth of the chamber in the head. The switch has two holes in each of which a pushing member a spring are received. The pushing member is received in the hole and covered by an inside of the chamber when the switch is not pivoted. The user may push either one of two ends of the pawl toward the chamber to shift one of the pushing members to be in alignment with one of the convex portions. The pushing member that is shifted pushes the convex portion and pivots the pawl to be matched with the gear wheel.
REFERENCES:
patent: 968080 (1910-08-01), Repass
patent: 4336728 (1982-06-01), Deibert
patent: 6516692 (2003-02-01), Hsien
patent: 6609444 (2003-08-01), Hsien
patent: 6761091 (2004-07-01), Hsien
patent: 20030010159 (2003-01-01), Hu
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