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Class Information
Number: 137/53
Name: Fluid handling > Speed responsive valve control > Centrifugal mass type (exclusive of liquid)
Description: Control systems wherein the speed responsive means comprises a rotating or revolving weight or weights, the position assumed by such weight or weights due to centrifugal force varying as a function of the speed at which they are rotated or revolved.










Sub-classes under this class:

Class Number Class Name Patents
137/57 Excess speed responsive 17
137/55 Periodically actuated valve 5
137/56 Rotating valve and rotating governor 40
137/58 With fluid servo-motor 7
137/54 With multiple valves 15


Patents under this class:

Patent Number Title Of Patent Date Issued
7247486 Method and apparatus for controlling reactions Jul. 24, 2007
7051750 Governor spring bracket assembly May. 30, 2006
6899514 Overspeed safety device May. 31, 2005
6179552 Speed control unit for a pneumatic rotation motor Jan. 30, 2001
5291086 Electrical actuator for valve or other device Mar. 1, 1994
4772186 Automatic fluid torque responsive shut-off mechanism for an air tool Sep. 20, 1988
4586884 Pneumatic power tool with speed governor May. 6, 1986
4443164 Secondary speed sensor for governed air grinders Apr. 17, 1984
4425931 Speed bias fluid pressure regulator and systems utilizing same Jan. 17, 1984
4417884 Centrifuge timer clamp Nov. 29, 1983
4389991 Rotation sensitive pressure regulator Jun. 28, 1983
4368004 Apparatus for preventing a turbine from exceeding a predetermined value of a monitored physical magnitude Jan. 11, 1983
4133060 Odorless toilet Jan. 9, 1979
4057113 Pneumatically powered hand tool with speed-control governor Nov. 8, 1977
3942422 Roof ventilator Mar. 9, 1976
3939856 Rotational speed responsive type fluid pressure signal control valve Feb. 24, 1976











 
 
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