초록 ▼

An engine-powered torque wrench ( 18 ) has a loop handle ( 19 ) that is orthogonal to a torque rod ( 22 ) of a torque handle. The engine-powered torque wrench has a heat engine ( 1 ) which rotates a toolhead ( 14 ) to which selected tools ( 25 ) or a striker gear ( 16 ) which can hold the selected t

An engine-powered torque wrench ( 18 ) has a loop handle ( 19 ) that is orthogonal to a torque rod ( 22 ) of a torque handle. The engine-powered torque wrench has a heat engine ( 1 ) which rotates a toolhead ( 14 ) to which selected tools ( 25 ) or a striker gear ( 16 ) which can hold the selected tools is attachable. The loop handle is adapted to be hand-grasped by a first hand of a user for primary support of a system weight of the engine-powered torque wrench while selectively positioning a selected tool on a targeted item ( 23 ) which typically but not necessarily includes a fastener head ( 24 ). The torque handle is adapted to be hand-grasped by a second hand of the user for secondary support of the system weight while simultaneously using the second hand for assisting in positioning of the selected tool, leveraging against rotational moment of the tool heat engine and throttling heat engines which are not preset-throttled. The engine-powered torque wrench can be adapted for either right-handed or left-handed use and for either right-side access or left-side access to the targeted item.

대표청구항 ▼

1. An engine-powered torque wrench comprising:a heat engine in an engine housing having an engine-base end and an engine-shaft end;an engine shaft extended from the engine-shaft end of the engine housing;a power-tool clutch with a clutch shaft having an engine end and a gear end in a clutch housing;

1. An engine-powered torque wrench comprising:a heat engine in an engine housing having an engine-base end and an engine-shaft end;an engine shaft extended from the engine-shaft end of the engine housing;a power-tool clutch with a clutch shaft having an engine end and a gear end in a clutch housing;the engine end of the clutch shaft being coupled to the engine shaft collinearly;the power-tool clutch being a predeterminedly slip clutch having controllable rotational slip per resistance to rotational power of the heat engine;a power-tool gear with a gear-input shaft and a gear-output shaft in a gear housing;the gear-input shaft being coupled to the gear end of the clutch shaft collinearly;a toolhead with a gear end and a tool end;the gear end of the toolhead being coupled to the gear-output shaft collinearly;the toolhead being adapted for detachable attachment of predeterminedly selected tools and toolholders selectively;a loop handle having a first loop end attached to a top side of the engine-powered torque wrench with the power-tool gear having a gear axis oriented horizontally;the loop handle having a second loop end attached to a predetermined portion of a bottom side of the engine-powered torque wrench;a torque handle having a torque rod with a first end of the torque rod attached to a first side of the engine-powered torque wrench proximate a first side of the engine housing;the torque rod being oriented orthogonally to the gear axis;the loop handle being adapted for first-hand-grasping selectively intermediate the first loop end and the second loop end for supporting weight of the engine-powered torque wrench and for positioning the tool end of the toolhead proximate a targeted item;the torque handle being adapted for second-hand-grasping for aiding in the supporting of the weight of the engine-powered torque wrench and in the positioning of the selected tool desirably proximate the targeted item; andthe torque handle being adapted for operative control of the heat engine. 2. The engine-powered torque wrench of claim 1 wherein:the torque handle includes a lever length that is adapted for hand-held resistance to rotational output power that is transmitted to the gear-output shaft. 3. The engine-powered torque wrench of claim 1 wherein:the engine-powered torque wrench includes a light-duty embodiment for which the heat engine has less than one horsepower;the heat engine is adapted for constant rotational speed; andthe power-tool gear includes a reduction gear having a single output ratio of speed for transmission to the gear-output shaft in proportion to rotational speed of the heat engine predeterminedly. 4. The engine-powered torque wrench of claim 3 wherein:the toolholder for which the toolhead is adapted for detachable attachment includes a striker gear; andthe striker gear is adapted for holding selected tools that are detachably attachable predeterminedly. 5. The engine-powered torque wrench of claim 4 wherein:the striker gear includes a wave-spring striker gear having one or more curved lobes of a curve-lobed wave spring for being engaged rotationally by one or more curved lobes of a curve-lobed striker; andthe curve-lobed striker has a striker shaft adapted for detachable attachment to the toolhead. 6. The engine-powered torque wrench of claim 5 wherein:the striker gear includes a socket attachment that is adapted to be inserted into a socket-boss end of a selected conventional wrench socket. 7. The engine-powered torque wrench of claim 1 wherein:the heat engine includes a glow-plug engine having glow-plug-heat ignition of fuel and compressed air. 8. The engine-powered torque wrench of claim 1 wherein:the heat engine includes a sparkplug engine having sparkplug ignition of the fuel and compressed air. 9. The engine-powered torque wrench of claim 1 wherein:the slip clutch includes a clutch plate which is attached to the clutch shaft for being rotated by the heat engine;the slip clutch plate includes a gear plate th at is attached to the gear end of the clutch shaft for rotation of the gear-input shaft; anda slip-control member is positioned proximate a gear side of the clutch plate for controlling contact and tightness of contact of the clutch plate with the gear plate. 10. The engine-powered torque wrench of claim 9 wherein:the clutch plate includes an external truncate cone; andthe gear plate includes an internal truncate cone that is adapted to be received by the external truncate cone of the clutch plate predeterminedly. 11. The engine-powered torque wrench of claim 9 wherein:the gear plate includes the external truncate cone; andthe clutch plate includes the internal truncate cone that is adapted to be received by the external truncate cone of the gear plate predeterminedly. 12. The engine-powered torque wrench of claim 1 wherein:the engine-powered torque wrench includes a heavy-duty embodiment for which the heat engine has more than one horsepower. 13. The engine-powered torque wrench of claim 12 wherein:the power-tool gear includes a reduction gear having a plurality of output ratios of speed for transmission to the gear-output shaft in proportion to rotational speed of the heat engine. 14. The engine-powered torque wrench of claim 12 wherein:the power-tool gear includes a reduction gear having a single output ratio of speed for transmission to the gear-output shaft in proportion to rotational speed of the heat engine. 15. The engine-powered torque wrench of claim 12 wherein:the toolholder for which the toolhead is adapted for detachable attachment includes a striker gear; andthe striker gear includes a striker-gear tool holder that is adapted for holding selected tools that are detachably attachable predeterminedly. 16. The engine-powered torque wrench of claim 15 wherein:the striker-gear holder includes a socket-attachment boss that is adapted to be inserted into a socket-boss end of a selected conventional wrench socket. 17. The engine-powered torque wrench of claim 1 wherein:the loop handle includes a top portion of the loop handle being positioned predeterminedly proximate a center of gravity vertically above the engine housing with the axis of the gear-output shaft being oriented horizontally for support of approximately a total weight of the engine-powered torque wrench with the torque handle being oriented approximately horizontal. 18. The engine-powered torque wrench of claim 1 wherein:the loop handle and the torque handle are adapted for selectable balance of support of the weight of the engine-powered torque wrench with an axis of the tool shaft being about horizontal and the torque handle being rotated selectively intermediate horizontality and approximately forty-five degrees from horizontality. 19. The engine-powered torque wrench of claim 1 wherein:the loop handle includes the top portion of the loop handle being positioned predeterminedly off of the center of gravity vertically above the engine housing with an axis of the engine-powered torque wrench being about horizontal for support of predetermined portions of the total weight of the engine-powered torque wrench with the loop handle and the torque handle. 20. The engine-powered torque wrench of claim 1 wherein:the loop handle includes a wrench-balance circuit in relationship to the axis of the engine-powered torque wrench being oriented horizontally;the wrench-balance circuit includes a top-front portion, a top portion, a rear portion, a bottom portion and a bottom-front portion of the loop handle;the top-front portion is extended upward vertically from proximate a top portion of the gear section to the top portion of the loop handle;the top portion of the loop handle is extended rearwardly to the rear portion of the loop handle which is aft of the engine housing predeterminedly and extended downwardly to the bottom portion of the loop handle which is predeterminedly below the engine housing;the bottom portion of the loop handle is extended forwardly to the bott om-front portion of the loop handle; andthe bottom-front portion of the loop handle is extended upward vertically and attached to the engine-powered torque wrench proximate a bottom portion of the gear housing. 21. The engine-powered torque wrench of claim 20 wherein:the loop handle includes a loop plane that is approximately parallel to the axis of the engine-powered torque wrench;the engine-powered torque wrench is adapted to have about equal weight on opposite sides of the loop plane; andthe torque handle is positioned proximate a center of gravity of the engine-powered torque wrench linearly intermediate the tool end of the toolhead and a starter for the heat engine that is oppositely disposed from the tool end of the engine-powered torque wrench. 22. The engine-powered torque wrench of claim 21 wherein:the engine-powered torque wrench is adapted to have predeterminedly near equal weight in all directions radially from the axis of the engine-powered torque wrench. 23. The engine-powered torque wrench of claim 22 and further comprising:at least one support member intermediate the engine section and the loop handle.