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US 6,142,759 AGranted
Two-shift fluid machine
AssigneeTochigi Fuji Sangyo Kabushiki
InventorsMasao Tateno, Kenji Hiraishi
Life of this patent
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Abstract
In a Roots displacement fluid machine (5) comprising rotors (15, 17) meshed with each other in a tooth trace (57, 59) formed in parallel to a rotating central axis, and a casing (13) having a rotor chamber (33) rotatably receiving the rotors (15, 17), a fluid inlet port for a fluid and a fluid outlet port, an inclined surface (67) forming an angle .theta. with respect to an opposing surface (65) of the rotor chamber (33) is disposed at least in a tip end of the end portion of the rotor (15), and a gap (69) is formed with respect to the opposing surface (65).
Claims4
A two-shaft fluid machine comprising:
- a pair of rotors meshed with each other in a tooth trace formed at an outer peripheral end of a rotating central axis;
- and
- a casing having a rotor chamber rotatably receiving each of the rotors, a fluid inlet port for a fluid and a fluid outlet port,
- wherein an inclined surface forming an angle .theta. with respect to an opposing surface of the rotor chamber is disposed at least in a tip end of the rotor end portion, thereby forming a gap with respect to the opposing surface and wherein the rotor includes a plane surface opposite the inner surface of the rotor chamber at the center portion of the rotor end portion.
1 more element
Dependencies are inferred from the claim text.