Tool having a rotatable driving stem

• US 5,802,936 A
• Filed: 03/07/1997
• Issued: 09/08/1998
• Est. Priority Date: 03/07/1997
• Status: Expired due to Fees

• Current Assignee: Kuo Chen Liu
• Original Assignee: Kuo Chen Liu
• Inventors: Liu, Kuo Chen
• Primary Examiner(s): Smith, James G.
• Assistant Examiner(s): Wilson, Lee
• Application Number:
  US08/813,226
• Time in Patent Office: 550 Days
• Field of Search: 81/450, 81/438, 81/439, 81/440, 81/177.8, 81/177.9, 81/177.6, 81/177.4, 81/490
• US Class Current: 81/450
• CPC Class Codes: B25B 13/56 Spanner sets
• CPC Class Codes: B25B 15/02 operated by rotating the handle
• CPC Class Codes: B25F 1/04 wherein the elements are brought into working positions by a pivoting or sliding movement
• CPC Class Codes: B25G 1/085 for screwdrivers, wrenches or spanners

Abstract

A tool includes a hub for slidably receiving a shaft which includes one or more projections. A driving stem has a number of internal teeth for engaging with the projection of the shaft. A spring may bias the projection of the shaft to engage with the internal teeth of the driving stem for positioning the driving stem. The driving stem is allowed to rotate about the shaft when the projection of the shaft is disengaged from the internal teeth by depressing the shaft against the spring.

Claims

1. A tool comprising:

a body including a hub,

a driving stem including a plurality of internal teeth,

a shaft slidably engaged in said hub and including at least one projection for engaging with said internal teeth of said driving stem, said shaft including an upper portion,

means for biasing said at least one projection of said shaft to engage with said internal teeth of said driving stem and for positioning said driving stem relative to said body,

wherein said driving stem being allowed to rotate about said shaft when said upper portion of said shaft is depressed against said biasing means causing said at least one projection of said shaft to be disengaged from said internal teeth of said driving stem, and

a cover including a panel having an orifice for engaging with said upper portion of said shaft, said cover including a notch for receiving said upper portion of said shaft.

2. The tool according to claim 1, wherein said body includes a cavity for receiving said driving stem and for allowing said driving stem to be folded and engaged in said body for storing purposes.

3. The tool according to claim 2 wherein said biasing means rotates said driving stem outward of said cavity of said body when said upper portion of said shaft is depressed against said biasing means.

4. The tool according to claim 1, wherein said body includes a plurality of holes for receiving tool bits.

5. The tool according to claim 4 further comprising a side cap secured to said body for enclosing the tool bits and for allowing the tool bits to be engaged in and removed from said body.