Large capacity locking pliers

B - Operations – Transporting – 25 – B

Patent

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Details

B25B 13/32 (2006.01) B25B 7/02 (2006.01) B25B 7/12 (2006.01) B25B 23/142 (2006.01)

Patent

CA 2126585

A large capacity locking pliers includes a body, a fixed jaw, a movable jaw, and an over-center toggle linkage secured between the movable jaw and the body to lock the movable jaw in position with respect to the fixed jaw. The jaws define respective working surfaces, and each of the working surfaces defines an end portion, an intermediate portion, and a concave inner portion. The concave inner portion of the fixed jaw extends over an arc .alpha. of at least 45° and the concave inner portion of the movable jaw extends over an arc .beta. of at least 80°. These concave inner portions are concentric when the movable jaws move to a selected open position to grip a large cylindrical workpiece. The fixed and movable jaws are asymmetrical in order to facilitate fabrication and finishing of the completed pliers.

ince-étau de grande capacité comprenant un corps, une mâchoire fixe, une mâchoire mobile, et une fermeture à genouillère décentrée fixée entre la mâchoire mobile et le corps destinée à bloquer en position la mâchoire mobile par rapport à la mâchoire fixe. Les mâchoires définissent les surfaces de travail respectives et chacune des surfaces de travail définit une extrémité, une partie intermédiaire et une partie intérieure concave. La partie intérieure concave de la mâchoire fixe couvre un arc .alpha. d'au moins 45 degrés et la partie intérieure concave de la mâchoire mobile s'étend sur un arc .bêta. d'au moins 80 degrés. Ces parties intérieures concaves sont concentriques lorsque les mâchoires mobiles se trouvent dans une position d'ouverture donnée afin de saisir une grosse pièce cylindrique. Les mâchoires mobile et fixe sont asymétriques afin de faciliter la fabrication et la finition de la pince.

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