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Class Information
Number: 451/431
Name: Abrading > Attachment > Valve or valve seat abrader > Orbital tool
Description: Attachment in which the grinding tool revolves about a center outside itself.

Patents under this class:

Patent Number Title Of Patent Date Issued
5897429 Injection molding seat lapping device Apr. 27, 1999
5882250 Valve refacing tool Mar. 16, 1999
5800253 Disc streak pattern forming method and apparatus Sep. 1, 1998
5690542 Disc streak pattern forming method and apparatus Nov. 25, 1997
5259144 Planetary-type lapping device for finish-grinding the valve seat of a safety relief valve Nov. 9, 1993
5022192 Conduit grinding apparatus Jun. 11, 1991
5001871 Machine for precision machining, with a rod for the determination of the practical mean axis of a hole of cylindrical general contour Mar. 26, 1991
4923343 Machine tool May. 8, 1990
RE32873 Apparatus for grinding and lapping annular sealing faces Feb. 21, 1989
4691480 Valve seat grinding apparatus Sep. 8, 1987
4662123 Grinder apparatus May. 5, 1987
4549373 Apparatus for grinding and lapping annular sealing faces Oct. 29, 1985
4464867 Radially adjustable lap Aug. 14, 1984
4388782 Handhole seat resurfacing tool for naval pressure fired boilers Jun. 21, 1983
4106880 Portable field machine for cutting, grinding and lapping valve seats Aug. 15, 1978
4050836 Portable field machine for cutting, grinding and lapping valve seats Sep. 27, 1977

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