Ratchet tool operatable at a small angle

Details Ratchet tool operatable at a small angle Ratchet tool operatable at a small angle

2000-06-07

2001-07-24

Hail, III, Joseph J. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

C081S058100, C081S057290

Reexamination Certificate

active

06263768

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a ratchet tool, and more particularly, to a ratchet tool having a disk securely mounted to a rotatable member in the head of the tool and a driving member engaged with the disk to rotate the disk together with the rotatable member at a small angle as needed.
BACKGROUND OF THE INVENTION
Some conventional ratchet tools known to applicant are U.S. Pat. No. 4,137,801 with a title of “COMBINED RATCHET AND TORSION WRENCH” to Imperio, U.S. Pat. No. 4,406,183 with a title of “FAST ACTING RATCHET WRENCH” to Wix, U.S. Pat. No. 4,265,148 with a title of “RATCHET TOOL” to Gartzke, U.S. Pat. No. 4,907,476 with a title of “SOCKET WRENCH WITH IMPROVED HANDLE” to Sidewinder Products Corporation, the Assignee, U.S. Pat. No. 4,532,832 with a title of “DUAL-MODE RATCHET WRENCH” to Christensen, U.S. Pat. No. 4,545,267 with a title of “COMBINATION GEAR RATCHET WRENCH APPARATUS” to Shumway, U.S. Pat. No. 4,869,138 with a title of “NEW AND IMPROVED RATCHET TOOL WITH ROTATABLE ROTOR LOCK AND RIGID SHIFTER FINGER” to Farris, U.S. Pat. No. 5,058,463 with a title of “RATCHET WRENCH WITH DUAL-ROTATING CONSTANT DRIVE HANDLE” to Midland Design Inc., the Assignee, U.S. Pat. No. 5,471,898 with a title of “BREAKER BAR WITH 90 DEGREE ROTATING SOCKET CONNECTOR HEAD” to Forman, and U.S. Pat. No. 5,887,493 with a title of “RATCHET WRENCH” to Main. The ratchet tools commonly have a complex structure which is composed of a lot of parts. The manufacturing processes are time and money costly.
The present invention intends to provide a ratchet tool which has a disk securely mounted to the rotatable member in the head of the tool and engaged with a driving member rotatably controlled by the user so that when the handle is not able to be rotated, the driving is rotated to rotate the rotatable member.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided a ratchet tool and comprising a ring-shaped head having a central hole which has a toothed inner periphery, and a recess defined in a first surface of the head. A passage is defined in the handle and the passage communicates with the recess. A rotatable member is rotatably received in the head and a pawl member is pivotally connected to the rotatable member, wherein the pawl member is engaged with the toothed inner periphery of the head. An elongated protrusion extends from the rotatable member and a disk is securely mounted to the elongated protrusion. A driving member is received in the recess and an operation rod is rotatably received in the passage and connected to the driving member. The driving member is rotatably engaged with the disk so that when rotating the driving member, the rotatable member is rotated.
The object of the present invention is to provide a ratchet tool that has a driving member engaged with a disk on the rotatable member so that when the handle of the tool cannot be rotated in a narrow area, the rotatable member can be rotated by rotating the driving member.
These and further objects, features and advantages of the present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, several embodiments in accordance with the present invention.


REFERENCES:
patent: 4137801 (1979-02-01), Imperio
patent: 4265148 (1981-05-01), Gartzke
patent: 4406183 (1983-09-01), Wix
patent: 4532832 (1985-08-01), Christensen
patent: 4545267 (1985-10-01), Shumway
patent: 4869138 (1989-09-01), Farris
patent: 4907476 (1990-03-01), Singleton
patent: 5058463 (1991-10-01), Wannop
patent: 5471898 (1995-12-01), Forman
patent: 5887493 (1999-03-01), Main
patent: 6145412 (2000-11-01), Cheng et al.

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