Jumper cable clamp for connecting car batteries

• US 4,975,089 A
• Filed: 11/02/1989
• Issued: 12/04/1990
• Est. Priority Date: 05/11/1989
• Status: Expired due to Fees

• Current Assignee: Kuo-Shu Lee
• Original Assignee: Kuo-Shu Lee
• Inventors: Lee, Kuo-Shu
• Primary Examiner(s): Bradley, Paula A.
• Application Number:
  US07/431,042
• Time in Patent Office: 397 Days
• Field of Search: 439/755, 439/759, 439/504, 439/506
• US Class Current: 439/755
• CPC Class Codes: H01R 11/24 with gripping jaws, e.g. crocodile clip
• CPC Class Codes: H01R 13/717 with built-in light source

Abstract

A jumper cable clamp to connect car batteries which includes a conventional terminal clamp having received therein a conductive expansion clip connected to an indication lamp. The conductive expansion clip may be pulled out and firmly retained by the resilient projections of a clip holder set in the clamp, such that the expansion clip is served to clip on the battery terminal. The indications lamp will be turned on to give a warning signal if the expansion clip is secured to the wrong battery terminal.

Claims

1. A jumper cable clamp, including:

a fixed clamping element made of plastic material and comprising two-side wall portions upstanding from the bottom defining therebetween a sliding way, a post and a slot on said sliding way, a plurality of convex strips and a pair of positioning holes on said side wall portions;

an expansion clip comprising two holding ends at the front defining therebetween a front opening, a back opening at the rear end, a retaining member curvilinearly raising from said back opening, said expansion clip being set in said sliding way;

a pull back spring having one end connected to said retaining member of said expansion clip and the other end connected to said post of said fixed clamping element;

a clip holder comprising a slot having seated therein a conductive spring plate, a front notch, a pair of resilient projections and a pair of retaining portions at its both sides;

an electric wire connector connected with an electric wire, and comprising two raised ends at the front, a front hook end, and a pair of notches, said front hook end being inserted into the front notch of said clip holder;

an indication lamp and a resistor being received in the slot of said fixed clamping element and connected between said pull back spring and said conductive spring plate;

a movable clamping element movably connected with said fixed clamping element and comprising a pair of projecting rods constantly pressing on the resilient projections of said clip holder; and

a return spring set between said movable clamping element and said electric wire connector, and comprising a hook end to retain the electric wire of said electric wire connector,

characterized in that said movable clamping element is pressed down to lift said two projecting rods from said resilient projections permitting protrusion of said expansion clip from said sliding way of said fixed clamping element for use, and the rear end of said expansion clip becomes firmly retained by said resilient projections of said clip holder, through the effect of said projection rods of said movable clamping element, upon release of said movable clamping element.