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Class Information
Number: 81/57.42
Name: Tools > Wrench, screwdriver, or driver therefor > Machine > Direct drive
Description: Wrench or screwdriver wherein the work driving means is in a direct line with respect to the force applying means.


Sub-classes under this class:

Class Number Class Name Patents
81/57.43 Flexible 22
81/57.44 Fluid 67
81/57.45 Oblique angle 0
81/57.46 Tangential engagement 25


Patents under this class:

Patent Number Title Of Patent Date Issued
7370559 Pneumatically operated screw driver May. 13, 2008
6494120 Bolt and nut disassembling apparatus Dec. 17, 2002
6247384 Fastening device Jun. 19, 2001
6178853 Actuating device for an electrical power wrench Jan. 30, 2001
5351582 Pipe turning tool Oct. 4, 1994
5024565 Hand tool Jun. 18, 1991
4846027 Screwdriver Jul. 11, 1989
4320674 Screw fastening apparatus Mar. 23, 1982
4287498 Tuning arrangement for electrical components Sep. 1, 1981



 
 
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