Tools – Wrench – screwdriver – or driver therefor – Handle clutched to head
Patent
1999-08-05
2000-10-24
Eley, Timothy V.
Tools
Wrench, screwdriver, or driver therefor
Handle clutched to head
81 632, B25B 1346
Patent
active
061349909
ABSTRACT:
A ratcheting tool includes a handle and a box end extending from the handle. The box end has a first compartment and a second compartment communicating with the first compartment, a wall defining the second compartment having a cavity. A gear wheel is rotatably mounted in the first compartment and includes an inner periphery for engaging with a fastener and an outer periphery with a number of first teeth. A pawl is mounted in the second compartment and includes a first side with a number of second teeth facing the first teeth of the gear wheel and a second side facing away from the gear wheel. The second side of the pawl includes an eccentrically located groove with a rectilinear section that is at an angle with a longitudinal direction of the handle. A ball is partially received in the cavity and contacts with the groove of the second side of the pawl. An elastic member is mounted in the cavity for biasing the ball toward the groove of the second side of the pawl. The pawl is moved toward the gear wheel to cause the second teeth of the pawl to securely mesh with the first teeth of the gear wheel. The pawl is also moved to bear against a wall defining the second compartment.
REFERENCES:
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patent: 5946987 (1999-09-01), Wei
patent: 5979274 (1999-11-01), Hsieh
Ling David
Tuan-Mu Hsien-Chung
Eley Timothy V.
Hand Tool Design Corporation
Nguyen Dung Van
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