Patent ID: 7331258
Filing Date: 2008-02-19
Classification: B25B

Abstract:
1. A tire assembly spanner, comprising: a hollow handle being installed with a bending tube portion at one end thereof; another end of the handle being installed with a holding portion; a front end of the holding portion having a stop edge; an end of the bending tube portion far away from the handle having a resisting portion; a lateral side of the resisting portion having a through hole; a ring enclosing the resisting portion and the ring having a hole; an engaging element being installed to one end of the resisting portion far away from the handle; one end of the engaging element having an engaging portion for receiving a sleeve; another end of the engaging element having a ratchet teeth portion corresponding to the resisting portion; a connection of the engaging element and the ratchet teeth portion being formed as a tapered portion; an inner side of the ratchet teeth portion being formed with ratchet teeth; an axial center of the engaging element having a groove for receiving a rotary portion; the rotary portion defining a first end having an annular disk-shaped portion with another end of the rotary portion being reduced forming a shaft; a lateral side of the shaft being formed with a recess; a lateral side of the first end having a switch which is received in the through hole of the resisting portion and the hole of the ring; a wheel having a penetrating axial hole for receiving the shaft; a lateral side of the wheel having a trench communicated to the axial hole for receiving a buckle; two ends of the buckle being formed with a first teeth and a second teeth; a side of the buckle facing to the trench being formed with two inclined surfaces; a control unit being installed between the buckle and the trench; the control unit being formed by a steel ball and an elastic body; the elastic body being installed within the recess of the shaft; wherein the rotary potion and the wheel are installed in the resisting portion; by rotating the switch, the control unit swings so that the buckle rotates at different directions; and wherein by the buckle resisting against the ratchet teeth of the ratchet teeth portion, the spanner can be driven bi-directionally.