Rotary expansible chamber devices – With signal – indicator or transparent inspection means
Reexamination Certificate
2005-04-12
2005-04-12
Denion, Thomas (Department: 3748)
Rotary expansible chamber devices
With signal, indicator or transparent inspection means
C418S180000, C418S268000
Reexamination Certificate
active
06877966
ABSTRACT:
The present invention is directed to an apparatus for determining vane wear in rotary sliding vane pumps that operate using slideable vanes, while the pump is in operation. The invention includes a structure that allows a predetermined amount of leakage from a pumping chamber after a predetermined amount of vane length is worn away. The leakage produces a decrease in pump efficiency that is indicated by an indicating device. The indicating device serves to warn that an amount of vane wear has occurred that indicates pump inspection is warranted. The invention also includes a view port formed in the pump housing to allow inspection of the vanes without having to disassemble the pump.
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Adams Evans P.A.
Denion Thomas
Henderson Timothy H.
Trieu Theresa
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