Speed governor for a pneumatic rotation motor

Details Speed governor for a pneumatic rotation motor Speed governor for a pneumatic rotation motor

2005-06-21

2005-06-21

Look, Edward K. (Department: 3745)

Rotary kinetic fluid motors or pumps

With control means responsive to non-cyclic condition...

By shaft speed or torque responsive means

C415S151000, C415S144000, C415S202000, C137S050000, C251S030030, C251S030050, C251S061200

Reexamination Certificate

active

06908277

ABSTRACT:
A speed governor for a pneumatic rotation motor having a pressure air inlet passage (15, 15′), an inlet valve (16; 56) including a flow controlling valve element (18; 58) located in the inlet passage (15, 15′), and a speed responsive activating device (24; 54) operatively connected to the inlet valve (16; 56), wherein the activating device (24, 54) comprises a pilot circuit with an activating surface (20; 70) on the valve element (18; 58), a restricted air supply opening (21, 72) communicating with the activating surface (20; 70), a bleed-off valve (24; 54) which communicates with the activating surface (20; 70) and which comprises an electromagnet actuator (27; 76), and a generator (30) driven by the motor and delivering to the actuator (27; 76) a voltage of a magnitude responsive to the actual motor speed to thereby make the bleed-off valve (24; 54) operate in response to the output voltage of the generator (30) and the actual motor speed.

REFERENCES:
patent: 3198954 (1965-08-01), Eggenberger et al.
patent: 3410030 (1968-11-01), McHenry et al.
patent: 3446483 (1969-05-01), Townsend
patent: 3923429 (1975-12-01), Schaedler et al.
patent: 4465443 (1984-08-01), Karden
patent: 4746808 (1988-05-01), Kaeser

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