US 6,386,072 B1Granted

Ratchet tool

OwnerChi Yuan-Chin, Yang Pei-Chihinventors

Life of this patent

Estimating the term…

Loading patent…

Abstract

A ratchet tool includes a ring-shaped head and a ring member is rotatably received in the ring-shaped head and a toothed outer periphery of the ring member is engaged with a pawl which is movably received in a recess in an inner periphery of the ring-shaped head. A protrusion extends from a top of the pawl and is retained in a notch of a plate from which two rods extend. A positioning ring is engaged with the ring-shaped head and has a slot so that the two rods extend through the slot. A lever has a head which has two holes so as to receive the two rods of the plate. The pawl can be shifted to engage with the ring member by pushing the lever. Two curve surfaces are defined in the two ends of the pawl and one of which is engaged with a curve surface defining the curve recess. The number of contact teeth between the ring member and the pawl is increased.

Claims2

Dependent claims

A ratchet tool comprising:

a ring-shaped head having a recess defined in an inner periphery thereof and a first passage defined in a curve surface defining said recess, a first ball and a first spring respectively received in said first passage, a second passage defined in a surface of said ring-shaped head, a second ball and a second spring received in said second passage;
a ring member rotatably received in said ring-shaped head and having a toothed outer periphery and a serrated inner periphery;
a pawl movably received in said recess and having a toothed surface, a protrusion extending from a top of said pawl;
a plate having a notch for retaining said protrusion therein and two rods extending therefrom;
a positioning ring engaged with said ring-shaped head and having a slot defined therethrough, said two rods extending through said slot, and
a lever having a head which has two holes so as to receive said two rods of said plate, said lever having two wings and each wing having a dent so that said second ball is engaged with one of said two dents.

3 more elements

Dependencies are inferred from the claim text.