Tools – Wrench – screwdriver – or driver therefor – Machine
Reexamination Certificate
2000-06-09
2001-11-06
Hail, III, Joseph J. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Machine
C081S058100, C081S062000, C081S059100
Reexamination Certificate
active
06311584
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a ratchet wrench, and more particularly to a ratchet wrench having an additional driving device.
2. Description of the Prior Art
Various kinds of ratchet wrenches have been developed for effectively driving the fasteners. U.S. Pat. No. 5,058,463 to Wannop discloses a typical ratchet wrench having a driving device rotatably received in a driving head, and a device provided for rotating the driving device with bevel gears. However, the bevel gears are subjected with large torques or large forces whenever the ratchet wrench is used such that the bevel gears will be easily damaged.
The present invention has arisen to mitigate and/or obviate the afore-described disadvantages of the conventional ratchet wrenches.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a ratchet wrench having an additional driving device for driving the driving stem.
In accordance with one aspect of the invention, there is provided a ratchet wrench comprising a handle including a first end having a head formed thereon, the head including an internal gear formed therein, the handle including a bore formed therein and communicating with the internal gear, at least one ring gear rotatably received in the head, a bevel gear rotatably received in the bore of the handle and engaged with the ring gear for rotating the ring gear in either direction, a seat rotatably received in the head and including a driving stem extended therefrom, a pair of pawls rotatably secured to the seat and each including two ends for selectively engaging with the internal gear, at least one rod engaged between the ring gear and the seat to selectively drive the seat with the ring gear, and means for rotating the bevel gear to rotate the ring gear with the rod.
The seat includes at least one surface formed thereon for defining a channel between the seat and the ring gear and for defining two narrow ends for the channel. A device is provided for moving the rod to either of the narrow ends of the channel and includes at least one actuator rotatably secured on the seat and having a first end for receiving the rod, and means for rotating the actuator to move the rod to either of the narrow ends of the channel.
A block is secured to the seat and includes at least one surface formed thereon for defining a channel between the block and the ring gear and for defining two narrow ends for the channel. The block includes an aperture formed therein, a knob includes an extension rotatably received in the aperture of the block and includes a device for selectively actuating the ends of the pawls to engage with the internal gear.
The actuating device includes a pair of spring-biased projections received in the extension of the knob and engaged with the pawls. The knob includes at least one actuator rotatably secured on the seat and having a first end for receiving the rod, and the extension includes at least one recess for rotatably receiving a second end of the actuator.
Further objectives and advantages of the present invention will become apparent from a careful reading of a detailed description provided hereinbelow, with appropriate reference to accompanying drawings.
REFERENCES:
patent: 2703030 (1955-03-01), Marvin
patent: 4532832 (1985-08-01), Christensen
patent: 4545267 (1985-10-01), Shumway
patent: 5058463 (1991-10-01), Wannop
patent: 6070499 (2000-06-01), Wisbey
Baxley Charles E.
Danganan Joni B.
Hail III Joseph J.
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