Metal deforming – By relatively receding work-engaging tool-faces
Reexamination Certificate
2006-09-19
2006-09-19
Banks, Derris H. (Department: 3725)
Metal deforming
By relatively receding work-engaging tool-faces
C072S453160, C072S464000, C072S705000
Reexamination Certificate
active
07107812
ABSTRACT:
A hydraulic rescue tool (20) that utilizes a hydraulic cylinder (22) having a piston rod (24) that is movably disposed within the housing of the cylinder to provide linear driving means for the rescue tool. A cylinder yoke (32) is rotatably attached to the hydraulic cylinder housing and includes a front handle bar (34) for manipulating the tool. Rotation of the cylinder yoke (32) relative to the cylinder (22) prevents injury to an operator in the event that the tool binds and torques. An implement unit (50), which is either a cutter (54) or a spreader (74), is detachably disposed onto the piston rod (24). Pivotal links (36) connect the unit (50) to the cylinder yoke (32), with the unit used for cutting or spreading metal during a rescue. A plurality of quick release pins (72) attach the implement unit (50) to the piston rod (24) and pivotal links, thus providing a rapid release of the implement unit (50) from the piston rod (24) and links (36) for replacement or repair. The piston rod (24) has a rebated diameter (82) on its internal end that is at least two times smaller than the piston. This reduction in diameter provides additional surface area for hydraulic pressure when retracting an attached implement unit.
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Ankerstar Donald L.
Patton Tommy L.
Banks Derris H.
Bonk Teresa M
Cota Albert O.
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