Rotary expansible chamber devices – Interconnected vanes – Integrally connected
Reexamination Certificate
2007-03-20
2007-03-20
Denion, Thomas (Department: 3748)
Rotary expansible chamber devices
Interconnected vanes
Integrally connected
C418S178000, C418S082000, C123S235000, C123S243000
Reexamination Certificate
active
11086912
ABSTRACT:
The pump is provided with a housing 31, a rotor 40, and a separating member 50. Rotor 40 and separating member 50 are rotated within housing 40. Separating member 50 separates the cavity of housing 31 into a divided space 77a, a divided space 7band a divided space 77c. A curved face 42 having a larger radius of curvature than rotor 40 is formed in a limited circumferential angular region at an outer peripheral surface of rotor 40. A space 43 is maintained between the curved face 42 and housing 31 even when the curved face 42 is closest to the inner face of housing 31. The space 43 forms a passage between an inlet port and an outlet port. When rotor 40 is rotated, there is a smaller degree of change in the resistance in the passage 43, and rotor 40 rotates smoothly.
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“Principles of New Machinery,” Tenth Edition, 27.13 Cary's rotary pump, part 1, pp. 203, 1997.
Davis Mary A.
Denion Thomas
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