Revolving screwdriver with ratchet device

• US 6,928,908 B1
• Filed: 08/04/2004
• Issued: 08/16/2005
• Est. Priority Date: 08/04/2004
• Status: Expired due to Fees

• Current Assignee: Hong-Chow Yu
• Original Assignee: Hong-Chow Yu
• Inventors: Yu, Hong-Chow
• Primary Examiner(s): Hail, III, Joseph J.
• Assistant Examiner(s): Grant, Alvin J
• Application Number:
  US10/911,809
• Time in Patent Office: 377 Days
• Field of Search: 814/90, 811/774, 814/39
• US Class Current: 81/490
• CPC Class Codes: B25B 15/04 with ratchet action
• CPC Class Codes: B25G 1/085 for screwdrivers, wrenches or spanners

Abstract

A revolving screwdriver comprises a forward ratchet device comprising a hollow, cylindrical seat and a ratchet shaft, and a hollow handle comprising a revolving cylinder including a plurality of axial, peripheral shank cartridges, and a push rod adapted to push the shank out of the cartridge into the ratchet shaft. The ratchet shaft is hollow and comprises a front end having a section of hexagon, a rear end having a section of circle, and a guide in the rear end thereof. The guide is aligned with a flat extended inwardly from the front end of the ratchet shaft such that it can automatically align one shank pushed out of the ratchet cylinder with the forward end of the ratchet shaft prior to pushing the shank out of the ratchet shaft for use.

Claims

1. A revolving screwdriver comprising:

a forward ratchet device comprising a hollow, cylindrical seat and a ratchet shaft; and

a hollow handle comprising a revolving cylinder including a plurality of axial, peripheral cartridges for receiving a plurality of hexagonal shanks having different tips, and a push rod adapted to push the shank out of the cartridge into the ratchet shaft;

wherein the ratchet shaft is hollow and comprises a front end having a hexagonal cross-section, a rear end having circular cross-section, and a guide in the rear end thereof, the guide being aligned with a flat surface extended inwardly from the hexagonal front end of the ratchet shaft such that it automatically aligns one shank pushed out of the ratchet cylinder with the forward end of the ratchet shaft prior to pushing the shank out of the ratchet shaft for use;

further wherein the guide comprises a first opening formed on the seat, a C-shaped plate having a central opening, and a ball disposed in the first opening, the ball having a first portion disposed in the seat and a second portion projected from the central opening when the plate is put on the seat.

2. The revolving screwdriver of claim 1, wherein the handle comprises a second opening on its surface to be in communication with the revolving cylinder so as to allow a person to put a finger in the second opening to contact the revolving cylinder prior to rotating the revolving cylinder.

3. The revolving screwdriver of claim 1, wherein the handle further comprises a spring depressible ball adapted to positioning on the revolving cylinder such that rotating the revolving cylinder will align one of the shanks with the rear end of the ratchet shaft.

4. The revolving screwdriver of claim 1, wherein the push rod comprises a front magnetic member for magnetically coupling to the shank prior to moving together.

5. The revolving screwdriver of claim 1, wherein the revolving cylinder comprises a plurality of stages each including a plurality of axial, peripheral cartridges for receiving the plurality of hexagonal shanks having different tips, and wherein each cartridge of one stage is adapted to align with the cartridges of the other stages to form a straight channel.