Patent ID: 6453779
Filing Date: 2002-09-24
Classification: B25B

Abstract:
A reversible ratchet-type wrench comprising:a handle; a head extended from the handle and having a hole, a web being defined between the handle and the head, the web including a cavity communicated with the hole of the head and a receiving hole communicated with the cavity, an inner periphery defining the receiving hole including a first positioning notch and a second positioning notch; a drive member rotatably mounted in the hole of the head and including a plurality of teeth defined in an outer periphery thereof; a pawl mounted in the cavity and including a first side facing the hole of the head and a second side facing away from the hole of the head, the first side of the pawl including a plurality of teeth for meshing with the teeth of the drive member; a switch member including a turn-piece outside the receiving hole of the web for manual operation, the switch member further including a positioning section extending from the turn-piece and a switching section extending from the positioning section, the positioning section being rotatably and radially slideably received in the receiving hole of the web and having a positioning member retained in one of the first positioning notch and the second positioning notch of the receiving hole of the web, the turn-piece being movable to move the positioning member into one of the first positioning notch and the second positioning notch; and a biasing/actuating means having a first end attached to the switching section of the switch member and a second end attached to the second side of the pawl for biasing the teeth of the first side of the pawl to engage with the teeth of the drive member; wherein when the positioning member is retained in the first positioning notch of the receiving hole of the web, the wrench allows ratcheting in a first direction, and when the positioning member is retained in the second positioning notch of the receiving hole of the web, the wrench allows ratcheting in a second direction that is reverse to the first direction.