Manually operated impact tool
a tool and operator technology, applied in the field of impact tools, can solve the problems of bolt shear off, system weight, system failure, etc., and achieve the effect of reducing the number of operators
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first embodiment
[0070] Referring now to FIGS. 8 and 9, there is illustrated the manually operated rotatable impact wrench (hereinafter “impact wrench”), generally referred to by reference numeral 800. The impact wrench 800 includes a driven member 802, which in the preferred implementation is a solid piece of metallic material, such as forged tool steel. The driven member has a means for holding a fastener rigidly attached thereto, such as a lug wrench 807. The driven member 802 and lug wrench 807 can be integrally formed or separately formed and fastened together, such as by welding. The driven member has at least one anvil surface 808.
[0071] A driving member 805 is rotatably disposed on the driven member 802, preferably, at point A by a pin, shoulder screw, or the like. The driving member 805 includes at least one impact mass 803 which corresponds to the anvil surface 808 when the driven member 802 and driving member 805 are in their closed position (not shown). In the first embodiment of the imp...
second embodiment
[0074] Referring now to FIGS. 10 and 11 there is illustrated the impact wrench of the present invention, generally referred to by reference numeral 900. In FIGS. 10 and 11, like reference features are represented by reference numbers in a 900 series of numbers. Thus, handle 901 is similar to handle 801. Impact wrench 900 is similar to impact wrench 800 except that the impact mass 903 is rigidly connected to the driving member 905, and is preferably integrally formed therewith. Furthermore, lifter cam 906 has three fingers 906a and is freely rotatable independent of the handle 901. That is, the handle 901 and lifter cam 906 rotate independently and are thus not rigidly connected to each other. However, rotation of the handle 901 causes the lifter cam 906 to rotate. Handle 901 includes a pin 906 offset from the axis of rotation of the handle 901 which engages an inner surface 906b of each finger 906a and forces the lifter cam 906 to rotate. The handle is shown in FIGS. 8 and 10 broken...
third embodiment
[0077] Referring now to FIGS. 14A-14D there is illustrated the impact wrench of the present invention. The impact wrench being generally referred to by reference numeral 1100. Referring first to FIGS. 14A and 14B, the impact wrench 1100 includes a shell 1102 which is rigidly connected to a fastener (not shown) preferably with a lug or socket wrench (not shown). The fastener is preferably in line with center A and not offset therefrom. The shell 1102 has at least one and preferably a plurality of anvils 1104 rotatably disposed therein such that they rotate about points B in the directions of arrows C within windows 1103 cut in the wall of the shell 1102. Point B preferably includes a pinned joint. The anvils are biased inwards towards the center A preferably by a torsion spring (not shown) at point B. A handle (not shown) is rigidly attached to follower plates 1106, which rotate inside the shell 1102 as the handle is rotated. The follower plates 1106 have long arms 1106a which engage...
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Abstract
Description
Claims
Application Information
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