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Class Information
Number: 137/57
Name: Fluid handling > Speed responsive valve control > Centrifugal mass type (exclusive of liquid) > Excess speed responsive
Description: Control systems wherein the speed responsive means is effective to actuate the valve or valves only at speeds above a predetermined speed.

Patents under this class:

Patent Number Title Of Patent Date Issued
6899514 Overspeed safety device May. 31, 2005
6179552 Speed control unit for a pneumatic rotation motor Jan. 30, 2001
5752483 Governor arrangement May. 19, 1998
5297573 Overspeed safety device Mar. 29, 1994
4657057 Safety tire valve for controlling speed of vehicle Apr. 14, 1987
4465443 Pneumatic power tool with speed governor and overspeed safety device Aug. 14, 1984
4379544 Turbine trip valve mechanism Apr. 12, 1983
4298317 Overspeed safety device Nov. 3, 1981
4278103 Overspeed control means for pneumatic tools Jul. 14, 1981
4265604 Rotary pneumatic tool with valve-closing pin actuated upon overspeed May. 5, 1981
4195533 Operative members for use in a quick shut-off apparatus Apr. 1, 1980
4184819 Secondary speed sensor for governed air grinders Jan. 22, 1980
4090821 Governor device May. 23, 1978
4018302 Liquid-lubricated roll with anti-flooding barriers Apr. 19, 1977
3945199 Flyweight speed sensor Mar. 23, 1976
3932071 Overspeed saftey control mechanism for rotary tools Jan. 13, 1976
3930764 Air tool overspeed shutoff device Jan. 6, 1976

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