Patent ID: 6497165
Filing Date: 2002-12-24
Classification: B25B,B25G

Abstract:
Water pump pliers, comprising of two pincer parts crossing themselves in a connecting region, each of said pincer parts including a handle portion and a jaw, wherein said pincer parts are movably connected in said connecting region such that said first pincer can be displaced relative to said second pincer to adjust a jaw-opening-width and that said two pincer parts can reciprocally pivot, blocking means provided such that further shifting of said first pincer part is blocked when said jaws stop against a workpiece to be gripped, a spring element installed between said pincer parts in such a way, that a releasing force from said spring element, operating in an opening direction of said jaws, acts upon said pincer parts, said spring element being connected with said handle portions of said two pincer parts in such a way that said spring element also acts upon said first pincer part with a torque directed around a spring fastening point in such a way that said jaws automatically move to a fully opened opening width following a manual release of said pliers, said spring element being a one-piece curved flat spiral spring with a first end rigidly attached to said handle of said second pincer part and with a second end being a spiral curved spring segment for generating said torque, said curved spring segment being rigidly attached to said handle of said first pincer part.