Revolvable clamp meter

• US 7,733,080 B1
• Filed: 11/20/2008
• Issued: 06/08/2010
• Est. Priority Date: 11/20/2008
• Status: Active Grant

• Current Assignee: Chung Instrument Electronics Industrial Co., Ltd.
• Original Assignee: Chung Instrument Electronics Industrial Co., Ltd.
• Inventors: Liu, Shaw-Lin
• Primary Examiner(s): Nguyen; Ha Tran T
• Assistant Examiner(s): Chan; Emily Y
• Application Number:
  US12/274,355
• Publication Number:
  US 20100123454A1
• Time in Patent Office: 565 Days
• Field of Search: 324126-127, 324/133, 324/156, 439/822, 439/858
• US Class Current: 324/126
• CPC Class Codes: G01R 1/22 Tong testers acting as secondary windings of current transformers

Abstract

The clamp meter contains a revolving member configured between the meter'"'"'s body member and jaw member. The revolving member is composed of a first base and a second base located on the interfacing sides of the body member and the jaw member, respectively. The first base and the second base are revolvably joined together by an axle extended axially from the body member into the jaw member via the first and second bases'"'"' aligned axle holes. The first base has at least a roller ball elastically embedded in a concave and exposed towards the second base. The roller ball would roll into one of a number of notches of the second base as the base and jaw members are rotated relative to each other, thereby creating a number of preset configurations of the included angle between the body and jaw members.

Claims

1. A clamp meter, comprising:

a body member having a display panel;

a jaw member; and

a revolving member joining said body and jaw members together, said revolving member having a first base located on said body member, a second base located on said jaw member, and an axle extended axially from said body member into said jaw member via a first axle hole of said first base and a second axle hole of said second base so that said body and jaw members are capable of revolving relative to each other;

wherein at least a roller ball is embedded in a concave on said first base around said first axle hole;

said roller ball is elastically supported by a spring inside said concave so that said roller ball is raised towards said second base or suppressed entirely into said concave;

a plurality of notches are provided on said second base around said second axle hole;

said notches are positioned such that, as said body member and said jaw member are rotated relative to each other, said roller ball rolls into one of said notches, thereby creating a number of preset configurations of the included angle between said body and jaw members.

2. The clamp meter according to claim 1, wherein said revolving member further contains a flat disc fixedly and perpendicularly joined to an end of said axle;

the diameter of said disc is larger than that of said second axle hole so that said second base is reliably sandwiched between said disc and said first base.

3. The clamp meter according to claim 2, wherein said disc has a first protrusion towards said second base;

said second base has at least a second protrusion towards said disc;

as such, said body member and said jaw member are rotated relative to each only up to a specific angle, clockwise or counterclockwise.