Patent ID: 6237448
Filing Date: 2001-05-29
Classification: B25B

Abstract:
A grip-tightener wrench comprising:a wrench enclosure having an outside periphery, an inside periphery and at least one closure gap;a wrench housing which encompasses the wrench enclosure within an inside periphery within which the wrench enclosure rotates;the wrench housing having an outside periphery that is adapted to predetermined wrench applications;closure portions having predetermined curvature oppositely disposed from the closure gap on the outside periphery of the wrench enclosure;housing portions having predetermined curvature on the inside periphery of the wrench housing at positions oppositely disposed circumferentially external from the closure portions;the closure portions being structured for engagement by housing portions and the housing portions being structured to engage the closure portions by rotation of the wrench housing against a fastener member positioned in the wrench enclosure; anda plurality of flat fastener-member contact surfaces with predetermined fastener-grasping orientation on the inside periphery of the wrench enclosure;wherein the closure portions are cams on oppositely disposed sides of a single closure gap;the outside periphery of the wrench enclosure is rounded at opposite sides of the closure portions;the housing portions are cam followers on the inside periphery of the wrench housing;the inside periphery of the wrench housing is rounded to receive the outside periphery of the wrench enclosure with sliding contact; andthe cams have cam profiles to be engaged by the cam followers and the cam followers have follower profiles to engage the cams for closing the closure gap to tighten the plurality of fastener-member contact surfaces onto the fastener member in the wrench enclosure by the rotation of the wrench housing.