Patent ID: 8584555
Filing Date: 2013-11-19
Classification: B25B

Abstract:
1. An open-end ratchet wrench, comprising: a gripping handle having an axis hole, a top panel and a bottom panel provided at a front end of said axis hole, a free space defined between said top panel and said bottom panel, a receiving hole penetrating said top panel and said bottom panel, and a slot channel communicating with said receiving hole; an actuating arm, which is pivotally provided in said axis hole, comprising an offset latch; a head base, which is provided in said free space, having an actuating hole, a hole opening communicating said actuating hole to outside, a mounting adapter being not capable of escaping from said hole opening, a compartment hole provided at a position corresponding to said receiving hole, a gap shaped and sized to match with said slot channel, a first holding chamber indentedly provided in a wall along said compartment hole, and a second holding chamber indentedly provided on said wall along said compartment hole, wherein said mounting adapter is coupled with said offset latch and said actuating hole has an enough margin for said mounting adapter to slide upwardly and downwardly; a ratchet wheel pivotally provided in said receiving hole and received in said compartment hole, wherein said ratchet wheel comprises an outer tooth portion on said outer circumference thereof, wherein said ratchet wheel further has a holding hole longitudinally penetrating a center thereof, and an opening communicating said holding hole to outside, wherein said opening is shaped and sized to match with said gap; a damping member mounted on said gripping handle for providing a damping effect to said ratchet wheel during operation of said ratchet wheel; and two ratchet pawls provided in said first holding chamber and said second holding chamber respectively, wherein each of said two ratchet pawls has a coupling tooth portion on a right portion of a first side thereof for coupling with said outer tooth portion of said ratchet wheel, and an escaping area on a left portion of said first side thereof for escaping from said outer tooth portion of said ratchet wheel, wherein each of said two ratchet pawls further comprises a resilient member on a second side opposite to said first side thereof for providing a predetermined resilient force, so as to retain a firmly engagement between said coupling tooth portion and said outer tooth portion, wherein said actuating arm drives said ratchet wheel to apply a single direction rotating force.