Screw driver
OwnerDaniel Huanginventor
Life of this patent
Estimating the term…
Abstract
A spanner type screw driver comprises a spanner device, a bit and a first and second rivets. The spanner device has a first spanner and a second spanner. The first spanner has a first hexagonal hole on the first head portion of the first spanner. The second spanner has a second hexagonal hole on the second head portion of the second spanner. The first hexagonal hole has six blunt corners. The second hexagonal hole has six blunt corners also. A tapered recess is disposed on the first hexagonal hole. A tapered recess is disposed on the second hexagonal hole. An elastic retaining ring is disposed on the tapered recesses. The first and second spanners are fastened together by rivets. The screw driver bit is inserted in the first hexagonal hole, the retaining ring and the second hexagonal hole.
Claims7
A spanner type screw driver comprising:
- a spanner device having a first spanner and a second spanner disposed beneath said first spanner;
- said first spanner having a first hexagonal hole on a first head portion of said first spanner;
- said second spanner having a second hexagonal hole on a second head portion of said second spanner;
- said first hexagonal hole having six blunt corners;
- said second hexagonal hole having six blunt corners;
- a first tapered recess which is formed on said first head portion of said first spanner disposed on said first hexagonal hole to communicate with said first hexagonal hole;
- a second tapered recess which is formed on said second head portion of said second spanner disposed on said second hexagonal hole to communicate with said second hexagonal hole;
- an elastic retaining ring disposed on said first tapered recess and said second tapered recess;
- said first and second spanners fastened together;
- a screw driver bit inserted in said first hexagonal hole, said retaining ring and said second hexagonal hole.
Dependencies are inferred from the claim text.