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Ratchet drive tool with manual and non-manual power actuation

  • US 5,251,706 A
  • Filed: 12/03/1992
  • Issued: 10/12/1993
  • Est. Priority Date: 12/03/1992
  • Status: Expired due to Fees
First Claim
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1. A drive device operational, optionally and selectively with non-manual power and with manual power,said device comprising coupler means for engaging a tool element forcibly to be rotated, rotatable drive shaft means for reversibly driving said coupler means, selectively, in each of two opposite rotational modes,pivot joint means interposed between said drive shaft means and said coupler means for connecting said drive shaft means to said coupler means,said coupler means being manipulable at said pivot joint means to extend, selectively, coaxially with said drive shaft means and, alternatively, to assume an attitude normal to said drive shaft means,housing means extending coaxially with said drive shaft means for defining handle means for manually gripping and for manipulating said drive device,speed-reducing and power-amplifying means confined in said housing means for regulating rotation of said drive shaft means,non-manual power means for driving said speed-reducing and power-amplifying means, and connector means for coupling said non-manual power means to said drive shaft means, for rotating said drive shaft, in each of two opposite drive directions,said housing means being arcuately manipulable manually, forcibly to rotate said coupler means when said housing means is pivoted at said pivot joint means to extend normally of a rotational axis of said coupler means connected to said drive shaft means,switch means operationally interposed between said non-manual power means and said drive shaft means for selectively connecting power to and for interrupting delivery of power to said drive shaft means,said switch means being closed and functioning to effect delivery of power to said drive shaft means when said drive shaft means extends coaxially with said coupler means, andinterrupter means for opening said switch means to cut off power to said drive shaft means when said coupler means is pivotally oriented to extend normally of a rotational axis of said drive shaft means.

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