Ratchet wrench having positioning effect

• US 6,948,406 B1
• Filed: 05/04/2004
• Issued: 09/27/2005
• Est. Priority Date: 05/04/2004
• Status: Active Grant

• Current Assignee: Yi Min Li
• Original Assignee: Yi Min Li
• Inventors: Li, Yi Min
• Primary Examiner(s): Hail, III, Joseph J.
• Assistant Examiner(s): Grant, Alvin J.
• Application Number:
  US10/837,568
• Time in Patent Office: 511 Days
• Field of Search: 81/632, 81/60, 81/61, 81/62, 81/631
• US Class Current: 81/63.2
• CPC Class Codes: B25B 13/461 with concentric driving and driven member
• CPC Class Codes: B25B 23/0035 Connection means between socket or screwdriver bit and tool

Abstract

A ratchet wrench includes a wrench body, a ratchet wheel, a cover, and a positioning device mounted between the cover and the wrench body. The positioning device includes a locking plate, a push plate, and an elastic plate. Thus, the locking portion of the locking plate is extended into the through hole of the cover and detachably locked in the annular groove of the socket to lock the socket on the cover, so that the socket is positioned on the wrench body rigidly and stably without detachment, thereby facilitating a user operating the wrench body and the socket to rotate a workpiece, such as a nut, bolt or the like.

Claims

1. A ratchet wrench, comprising:

a wrench body having an end formed with a receiving hole;

a ratchet wheel rotatably mounted in the receiving hole of the wrench body;

a cover mounted on the wrench body and formed with a through hole communicating with the receiving hole of the wrench body; and

a positioning device mounted between the cover and the wrench body and including;

a locking plate slidably mounted on the cover and having a first side formed with a locking portion extended into the through hole of the cover,

a push plate movably mounted on the cover and having a first end connected with a second side of the locking plate to move the locking plate therewith and a second end protruded outward from the cover; and

an elastic plate mounted on the cover and urged on the push plate.

2. The ratchet wrench in accordance with claim 1, wherein the locking portion of the locking plate is substantially arc-shaped.

3. The ratchet wrench in accordance with claim 1, wherein the cover has a side formed with a receiving chamber communicating with the through hole and a channel communicating with the receiving chamber and located beside the through hole, the locking plate is mounted in the receiving chamber of the cover, the push plate is mounted in the receiving chamber of the cover, and the elastic plate is mounted in the channel of the cover.

4. The ratchet wrench in accordance with claim 3, wherein the channel of the cover is substantially arc-shaped.

5. The ratchet wrench in accordance with claim 3, wherein the channel of the cover has a distal end formed with a retaining recess, the push plate has a mediate portion formed with a cavity, and the elastic plate has a first end urged on the push plate and received in the cavity of the push plate and a second end formed with a hook portion locked in the retaining recess of the channel of the cover, so that the elastic plate is retained in the channel of the cover.

6. The ratchet wrench in accordance with claim 1, wherein the second side of the locking plate is formed with a tapered urging slot, and the first end of the push plate is formed with a tapered urging portion received in the urging slot of the locking plate and urged on a wall of the urging slot of the locking plate to move the locking plate outward relative to the cover to detach the locking portion of the locking plate from the through hole of the cover.

7. The ratchet wrench in accordance with claim 1, wherein the second end of the push plate is formed with a push portion.

8. The ratchet wrench in accordance with claim 1, wherein the elastic plate is substantially arc-shaped.

9. The ratchet wrench in accordance with claim 1, further comprising a socket mounted in the ratchet wheel and having an end extended into the through hole of the cover and formed with an annular groove communicating with the through hole of the cover, wherein the locking portion of the locking plate is detachably locked in the annular groove of the socket to lock the socket on the cover.