Rotary kinetic fluid motors or pumps – With control means responsive to non-cyclic condition... – Centrifugally initiated valve controlling fluid flow in...
Reexamination Certificate
2007-07-03
2007-07-03
Kershteyn, Igor (Department: 3745)
Rotary kinetic fluid motors or pumps
With control means responsive to non-cyclic condition...
Centrifugally initiated valve controlling fluid flow in...
C415S030000, C415S036000, C415S904000
Reexamination Certificate
active
10531153
ABSTRACT:
A pneumatic high speed motor includes a stator housing, a rotor journalled in the stator housing, and a pressure air inlet passage. A speed governor for the motor includes a valve element that is shiftable between an open position and a closed position for controlling pressure air flow through the pressure air inlet passage, and a spring which continuously biases the valve element toward open position. An air compressor is driven by the rotor to deliver an output pressure, which is responsive to a speed of the rotor, to an activating surface of the valve element. The activating surface of the valve element is acted upon by the output pressure of the air compressor to shift the valve element toward the closed position against the bias force of the spring at rotor speed levels exceeding a desired operating speed level.
REFERENCES:
patent: 3128989 (1964-04-01), Allingham
patent: 4671068 (1987-06-01), Moody et al.
patent: 4776752 (1988-10-01), Davia
patent: 5314299 (1994-05-01), Jacobsson
patent: 6241464 (2001-06-01), Huffaker et al.
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