Screw driver having a light device

• US 5,713,656 A
• Filed: 09/25/1996
• Issued: 02/03/1998
• Est. Priority Date: 09/25/1996
• Status: Expired due to Fees

• Current Assignee: Ching Chou Lin
• Original Assignee: Ching Chou Lin
• Inventors: Lin, Ching Chou
• Primary Examiner(s): CARIASO, ALAN B
• Application Number:
  US08/719,430
• Time in Patent Office: 496 Days
• Field of Search: 362/102, 362/109, 362/118, 362/119, 362/120, 362/187, 81/177.4
• US Class Current: 362/120
• CPC Class Codes: B25B 23/18 Devices for illuminating the head of the screw or the nut

Abstract

A screw driver includes a handle having a casing for receiving batteries. A switch is electrically connected to the battery. A socket is engaged in the handle for receiving a lamp. A transparent block is engaged in the front end of the handle for engaging with a driving tool. A ferrule is rotatably engaged to the handle for engaging with and for retaining the transparent block in place. A reflector is engaged around the lamp and a spring may bias may bias the reflector away from the socket for adjusting the light beam of the lamp.

Claims

1. A screw driver comprising:

a handle including a bore and including a front portion and a rear portion,

a casing engaged in said bore of said handle and engaged in said rear portion of said handle, said casing including a cavity for receiving at least one battery and including at least one recess for receiving tool bits,

means engaging with said handle and said casing for guiding said casing to slide along said handle and for preventing said casing from rotating relative to said handle,

a cap secured to said rear portion of said handle,

a switch means engaged in said cap and electrically connected to said battery,

a socket engaged in said bore of said handle,

a lamp secured in said socket and electrically connected to said battery,

a transparent block engaged in said bore of said handle and engaged in said front portion of said handle, said transparent block including an engaging orifice formed therein for engaging with a driving tool,

a ferrule rotatably engaged to said front portion of said handle for engaging with and for retaining said transparent block in place,

a reflector engaged in said bore of said handle and disposed between said socket and said transparent block and engaged around said lamp, and

means for biasing said reflector away from said socket and for allowing said reflector to be moved away from said socket by said biasing means for adjusting a light beam of said lamp when said ferrule is rotated relative to said handle,

said casing including at least one first channel for engaging with at least one first conductor and for electrically connecting said battery to said switch means, said casing including at least one second channel for engaging with at least one second conductor and for electrically connecting said battery to said lamp.

2. A screw driver according to claim 1, wherein said socket includes two holes for engaging with two prongs of said lamp, and includes two conductors for electrically connecting to said prongs of said lamp, said conductors each includes a cylindrical leg for engaging with said prong of said lamp.