Class / Patent application number | Description | Number of patent applications / Date published |
417245000 | Fluid motor for one stage supplied from another stage | 7 |
20080253903 | Vacuum pumps with auxiliary pumping stages - Vacuum pumping apparatus includes a housing, one or more primary pumping stages disposed in the housing, a motor coupled to the primary pumping stages, the motor including at least one stationary surface and at least one moving surface when the motor is energized, the stationary and moving surfaces of the motor defining an auxiliary pumping stage coupled in series with the primary pumping stages to pump gas through a pumping channel between the stationary and moving surfaces of the motor, the housing having a first exhaust port between the primary pumping stages and the auxiliary pumping stage, and a second exhaust port at an outlet of the auxiliary pumping stage, and a valve connected in series with the first exhaust port and configured to close when an inlet pressure of the vacuum pumping apparatus is below a predetermined pressure. | 10-16-2008 |
20100158708 | TWO-STAGE MEMBRANE PUMP WITH ECONOMICAL INLET PORT DESIGN - A two-stage membrane pump having a first pump head and a second pump head is provided. The pump heads are typically crank operated with a camshaft set up such that one pump head is in exhaust mode and the other in inlet mode, and vice-versa, during operation. The membrane and the inlet and outlet valves of the pump heads are designed to work together, along with each pump head working synchronously such that the inlet of the second pump head and exhaust of the first pump head are sealed by the actions of the two membranes. As a result an inlet valve in the second pump head is not needed. The costs of such a pump are thereby reduced while increasing the reliability of the two-stage pump. | 06-24-2010 |
20100239437 | FLUID CHANNELING DEVICE FOR BACK-TO-BACK COMPRESSORS - A fluid channeling device including a channeling body, an axial transfer channel, and a radial outlet channel. The channeling body includes first and second annular body sections spaced axially apart and a tubular body section extending between the first and second body sections. The axial transfer channel is defined axially through the channeling body, and is configured to fluidly couple a first compression assembly with a second compression assembly. The radial outlet channel is defined radially through the channeling body and is configured to fluidly couple the second compression assembly with an outlet. | 09-23-2010 |
20110135506 | MULTI-STAGE VACUUM PUMP - A multi-stage vacuum pump includes a plurality of rotor elements ( | 06-09-2011 |
20110280742 | BALANCE DRUM CONFIGURATION FOR COMPRESSOR ROTORS - Method and system for a rotary machine, e.g., a back-to-back compressor. A first section includes a first inlet duct, at least one first impeller and a first outlet duct. A second section includes a second inlet duct, at least one second impeller and a second outlet duct. The first section and second section share a common rotor. A first balance drum is disposed between the two sections, while a second section is disposed between the first inlet duct and the rotor. In a single section compressor, the balance drum can be disposed on the inlet side of an impeller rather than a discharge side. | 11-17-2011 |
20130052047 | VARIABLE OUTPUT PUMP - A variable output pump includes a fluid input, a control stage pump having an input portion and an output portion, a main stage pump having an input portion and an output portion, and a differential linkage in mechanical communication with the control stage pump and the main stage pump. The input portion of the control stage pump is in fluid communication with the fluid input and the input portion of the main stage pump is in fluid communication with the fluid input and the output portion of the control stage pump. | 02-28-2013 |
20150078928 | COMPRESSOR, AIR CONDITIONER SYSTEM COMPRISING THE COMPRESSOR AND HEAT PUMP WATER HEATER SYSTEM - Provided is a compressor, an air conditioner system comprising the compressor and a heat pump water heater system. The compressor comprises: a low-pressure compression component, a medium-pressure chamber, a low-pressure chamber gas discharge passageway, an enthalpy-increasing component, a high-pressure compression component, a medium-pressure gas passageway and a high-pressure chamber gas discharge passageway. The medium-pressure gas passageway comprises a passageway section at the side toward the low-pressure chamber gas discharge passageway and a passageway section at the side toward the high-pressure chamber gas suction passageway, wherein a ratio between a minimum cross sectional area of the passageway section at the side toward the low-pressure chamber gas discharge passageway and a minimum cross sectional area of the passageway section at the side toward the high-pressure chamber gas suction passageway is ranged from 1.4 to 4. In the compressor, the pressure fluctuation and the flow velocity fluctuation of the refrigerant are relatively smaller, which can improve the first-stage gas discharge plumpness and the second-stage gas suction plumpness, and increase the gas replenishment volume, thereby improving the working efficiency and the energy efficiency ratio of the compressor, and reducing the energy consumption. | 03-19-2015 |