Patent ID: 7944197

Claim:
A novel clamp meter with rotary mechanism for clamp jaws comprising a main body that is made up of a) a cover housing and a base housing, the two housings enclosing a measurement circuitry of the clamp meter; b) a display screen, a function selection switch, and a set of push buttons to select testing parameters are housed within said cover and base housings and electrically connected to said measurement circuitry, c) two input terminals, d) a clamp housing that houses a pair of clamp jaws, each of said clamp jaws containing electrical coils, said coils being electrically connected to said circuitry; said clamp jaws being connected to said clamp housing through an arrangement comprising a pivot sleeve and pivot screw for each of the clamps, and the two jaws from said pair of clamp jaws being connected to each other through a central hinge arrangement wherein each of the said jaws have a loop that are positioned axially, through which a pin, which is made of metal or any other suitable material selected from a group of materials comprising hard plastic, hard rubber, and wood, passes to form the hinge arrangement, e) a trigger that is used for opening and closing said clamp jaws, wherein when pressed, the trigger pushes a trigger-end of a pusher, said pin being fixedly attached to a hinge-end of said pusher such that when said trigger is operated, said pusher gets pushed along a longitudinal axis, thereby moving said pin in the same direction, and wherein said pin, through the central hinge arrangement, makes the clamp jaws rotate in their own plane, thereby opening them around the pin, f) a compression spring for each of said jaws, wherein said compression springs are so located that said clamp jaws, in their open position, press against said compression springs, and whereby, upon the release of said trigger, said compression springs push said clamp jaws back into their closed position, g) a rotary mechanism that allows rotation of said clamp jaws together around the longitudinal axis of said pusher, wherein said rotary mechanism comprises: i) a disk that is formed integrally with said clamp housing, wherein a periphery of the disk is so shaped that it forms alternate protrusions and grooves in a plane of the disk, each of said protrusions having a hump, wherein said disk is made from any electrically non conducting material selected from a group of materials comprising hard or semi-hard materials, ii) ball and catch arrangements, at least one in number, that are provided peripherally on the disk, wherein each ball is provided with a locking spring such that said ball is secured in a groove when not under application of a rotational force while turning said pair of clamp jaws.