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Class Information
Number: 408/217
Name: Cutting by use of rotating axially moving tool > Tool or tool with support > With pitch-stabilizing ridge > Including cutting teeth of different width
Description: Device having a plurality of cutting extremities adapted to follow one another in a common kerf wherein a subsequently acting extremity serves to make the kerf broader at a given level in the work than a previously acting extremity.

Sub-classes under this class:

Class Number Class Name Patents
408/218 And different root circles 4

Patents under this class:

Patent Number Title Of Patent Date Issued
7055515 Saw blade with varied finishing elements Jun. 6, 2006
6062777 Machining threaded tubular goods May. 16, 2000
5033919 Stabilized tap with air release Jul. 23, 1991
4824297 Thread forming apparatus having tangential chasers for cutting a thread on a railroad spike Apr. 25, 1989
4818165 Threaded element for use as an insert Apr. 4, 1989
4466762 Tool for forming internal screw threads Aug. 21, 1984
4396321 Tapping tool for making vibration resistant prevailing torque fastener Aug. 2, 1983
4181457 Tapping tool for making vibration resistant prevailing torque fastener Jan. 1, 1980

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