| 摘要 |
A strap wrench ( 10 ) suitable for turning an oil filter canister ( 16 ) comprises a strap ( 14 ) and a drive unit ( 12 ). The drive unit ( 12 ) has a portion ( 14 e) of the strap secured to it and includes a toothed rotary drive element ( 18 ) and a guide surface ( 48 ). The rotary drive element ( 18 ) has a drive member connection formation ( 24 ) connectable with a rotatable input drive member. A passage ( 46 ) is defined between the guide surface ( 48 ) and rotary drive element ( 18 ) through which a free end ( 14 e) of the strap is threaded to form a loop with teeth ( 22 ) of the rotary drive element ( 18 ) engaging the strap such that rotation of the rotary drive element imparts a pulling force to the strap that pulls the strap through the passage to tighten the loop onto the oil filter canister and apply a turning force to the canister. The strap wrench ( 10 ) can be used to apply a turning force to a generally cylindrical surface of other objects such as a tube or pipe.
|
