초록 ▼

A power wrench operated with a pressure medium comprises a wrench head casing (10) which is engaged by a piston-cylinder unit (28,29). The other end of the piston-cylinder unit (28,29) is pressing against a support element (27) guided on a guideway (22) of the wrench head casing (10). The outer end

A power wrench operated with a pressure medium comprises a wrench head casing (10) which is engaged by a piston-cylinder unit (28,29). The other end of the piston-cylinder unit (28,29) is pressing against a support element (27) guided on a guideway (22) of the wrench head casing (10). The outer end (28) of the support element is applied to a stationary abutment. Upon rotating the wrench head (10) the ring (11) retaining the bolt or screw head is entrained by a ratchet (15) only in one sense of rotation, while the wrench head casing (10) is returned idly without entrainment of ring (11) in the other sense of rotation.

대표청구항 ▼

A power wrench comprising: a wrench head casing having a ring to receive a button die; a support element carried within the wrench head casing for abutment against a stationary support; a piston-cylinder unit coupled between the wrench head casing and the support element for moving the wrench head c

A power wrench comprising: a wrench head casing having a ring to receive a button die; a support element carried within the wrench head casing for abutment against a stationary support; a piston-cylinder unit coupled between the wrench head casing and the support element for moving the wrench head casing relative to the support element; and a guideway for the support element contained in said wrench head casing, said piston-cylinder unit located in said guideway and said support element being displaceable in the guideway and freely protruding from one end of the guideway.