Combination wrench

• US 7,093,519 B1
• Filed: 04/25/2006
• Issued: 08/22/2006
• Est. Priority Date: 04/25/2006
• Status: Expired due to Fees

• Current Assignee: Wen-Kuo Huang
• Original Assignee: Wen-Kuo Huang
• Inventors: Huang, Wen-Kuo
• Primary Examiner(s): Wilson, Lee D.
• Assistant Examiner(s): OJINI, EZIAMARA ANTHONY
• Application Number:
  US11/380,197
• Time in Patent Office: 119 Days
• Field of Search: 81/60, 811/247, 811/251, 811/771, 811/775, 811/777, 811/80
• US Class Current: 81/60
• CPC Class Codes: B25B 13/462 the ratchet parts engaging in a direction radial to the tool operating axis
• CPC Class Codes: B25B 13/56 Spanner sets
• CPC Class Codes: B25G 1/063 for screwdrivers, wrenches or spanners

Abstract

This invention discloses a three-in-one combination wrench. A preferred embodiment features an easily assembled ratchet wrench in the middle of the wrench body, suitable for operation in confined spaces. The combination wrench terminates at one end in a pair of opening jaws for engaging fasteners of various sizes that fit into the jaws; and at the other, in an adjustable mortise-tenon pivotal wrench for approaching fasteners from an optimal angle to maximize torque with least effort. Furthermore, a substantially symmetrical streamlined dual-handle is ergonomically configured for a comfortable holding gesture.

Claims

1. A combination wrench comprising:

(A) a ratchet wrench positioned in the middle of said combination wrench;

(B) a pair of opening jaws disposed at one end of said combination wrench, and spaced to define an opening for a workpiece; and

(C) a mortise-tenon pivotal wrench at the other end of said combination wrench.

2. The wrench as claimed in claim 1 wherein said ratchet wretch comprises:

(A) a receiving chamber having a top circular groove at the top of the inner wall, wherein said inner wall has a plurality of ratchet teeth for engagement;

(B) a ratchet driving body to be received in said receiving chamber, wherein said ratchet driving body includes, from bottom to top,

a drive shaft to snap onto workpieces,

a lower annular groove for engagement,

an outer toothed wall for meshing with said inner wall of said receiving chamber,

an upper annular groove for joining with said top circular groove of said receiving chamber, and

a direction-switch to control the rotation of said ratchet wrench; and

(C) a securing snap coil to lock in with said lower annular groove of said ratchet driving body at the bottom of said receiving chamber.

3. The wrench as claimed in claim 2 wherein said drive shaft is substantially squarely shaped to accommodate standard sleeves.

4. The wrench as claimed in claim 1 wherein said mortise-tenon pivotal wrench comprising

(A) a mortise defining a substantially U-shaped recess at one end of said combination wrench, confined by the two sticking-out portions and an inner side of said mortise, wherein said mortise includes a through-hole in said two sticking-out portions for placement of screws,

(B) a tenon for coupling with said mortise in said U-shaped recess including, from bottom to top, a driving shaft at the bottom to snap onto sleeves, a side bore on both sides for communicating with said through-hole in said mortise, and a ball hole for anchoring in said inner side of said mortise,

(C) a spring-ball system having a metal ball linked with a spring as a positioning and stretching interface between said mortise and said tenon, wherein the end of said spring is fixed to said inner side of said mortise, and said metal ball anchors in said tenon through said ball hole, and

(D) a pivotal screw passing through said side bore of said tenon, as well as said through-hole of said mortise for a pivotal movement of said tenon.

5. The wrench as claimed in claim 4 wherein said driving shaft is substantially squarely shaped to accommodate standard sleeves.

6. The wrench as claimed in claim 1 wherein said pair of opening jaws has a substantially V-shaped profile.

7. The wrench as claimed in claim 1 wherein one of said pair of jaws is toothed on the attachment side with workpieces.

8. The wrench as claimed in claim 1 wherein the two handle sections from the two ends to the middle of said combination wrench concave inwardly in a streamlined way, adapted for a comfortable hand holding gesture.