Patent ID: 6223836
Filing Date: 2001-05-01
Classification: B25B

Abstract:
A fluid-operated tool, comprising an engaging part including an engaging element for engaging and turning a threaded connector; and a drive part including a fluid-operated drive with a cylinder and a piston movable in said cylinder under the action of fluid admitted into said cylinder for turning said engaging element, said cylinder having a substantially non-round inner chamber and a substantially non-round cross-section with an outer width which substantially does not exceed a width of said engaging part and an outer length which exceeds said width of said cylinder, said piston being substantially non-round in correspondence with a non-round shape of said inner chamber and having a cross-sectional shape with a length which is greater than a width, so as to allow working with the fluid-operated power tool in a limited clearance area because of a smaller outer width of said cylinder than its length and at the same time to provide transmission of a high torque because of the greater length of said piston than its width.