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7651657 |
Manufacturing of controlled porosity metallic tools
A process for making a metal tool having controlled porosity is disclosed. The process includes the step of preparing metal powder by gas atomization. The metal powder is filled into a metal...
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6123516 |
Vacuum pump
A vacuum pump, comprising at least one pump chamber (7, 8, 23 to 26) and at least one chamber (3, 5, 27) adjoining the pump chamber. The vacuum pump is fitted with a gas ballast device to avoid...
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6106250 |
Lobed-rotor-type pump having a communication passage between working-fluid chambers
A lobed rotor-type pump has a drive shaft, a pump housing, an eccentric rotor journal, a rotor, three working-fluid chambers, intake and discharge ports, and a communication passage. The pump...
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5944499 |
Rotor-type pump having a communication passage interconnecting working-fluid chambers
A rotor-type pump comprises a housing having a trochoidal curved surface and an intake port and a discharge port. A drive shaft is mounted rotatably about a first axis in the housing. A rotor...
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4697994 |
Multistage discharge type rotary vacuum pump
A multistage discharge type rotary vacuum pump comprises a rotor rotably mounted within a cylinder chamber and dividing the cylinder chamber into first stage and second stage working chambers. A...
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4560328 |
Rotary piston machine having a plurality of chambers containing reciprocating flap pistons
The rotary piston machine contains a rotor (22) having a plurality of sector-shaped chambers (30). Each chamber (30) houses a flap piston being swivelingly mounted and reciprocated synchroneously...
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4233003 |
Rotary pump
A rotary pump which comprises a cylinder having two walls which cover both ends thereof to form a compressing chamber, each of the walls includes a bearing at its center and holes around the...
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4088426 |
Sliding vane type of compressor-expander having differential eccentricity feature
A compressor-expander for use in air conditioning including a chamber of generally elliptical cross section having a compressor side and an expander side each with inlet and outlet ports. Rotatable...
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4009573 |
Rotary hot gas regenerative engine
A rotary positive displacement, hot gas regenerative engine having at least two cylindrical rotors, each of which is disposed within an elliptical stator. The longitudinal axis of one rotor is in...
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3924976 |
Engine
A rotary fluid engine powered by externally pressurized working fluid including a rotor and externally plurality of swinging arms positioned to engage with and impart a torque force to the rotor...
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3904327 |
Rotary compressor-expander having spring biased vanes
A rotary unitary compressor-expander for use as a refrigeration device. The unit includes a stator defining a chamber having an oval cross-section and a rotor mounted within the chamber. The rotor...
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3788770 |
FLUID PUMP WITH FLOW CONTROL MEANS
A fluid pump including a plurality of expansible chambers and a bypass flow control valve for directing fluid flow from the outlet of selected chambers to the inlet of the other chambers when the...
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3752605 |
ROTARY GAS COMPRESSOR
A rotary gas compressor including a single vaned rotor positioned within a stator housing shaped to provide high and low pressure chambers, the housing and rotor being relatively movable to vary...
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3688749 |
SUPERCHARGED ROTARY COMBUSTION ENGINE
A supercharged rotary engine having a three-lobed trochoidal housing providing an extra expansion chamber for prolonged expansion and extraction of more work from combustion gases, in which during...
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3381891 |
MULTI-CHAMBER ROTARY VANE COMPRESSOR
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