| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 417118000 | Liquid pumped by supplying or exhausting gaseous motive fluid to or from pumping chamber | 18 |
| 20080286122 | GAS-DRIVEN LIQUID PUMP - A gas-driven liquid pump includes a gas source, a tank, a pumping pipe, at least one gas conveying pipe, and at least one liquid conveying pipe. The pumping pipe includes a gas input end, a liquid output end and a suction portion located between the gas input end and the liquid output end. An inner diameter of the pumping pipe gradually decreases from the gas input end to the suction portion, and the inner diameter of the pumping pipe gradually increases from the suction portion to the liquid output end. At least one gas conveying pipe is configured for connecting the gas source and the gas input end of the pumping pipe. One end of the liquid conveying pipe is connected to the tank, and another end is engaged with the suction portion of the pumping pipe. | 11-20-2008 |
| 20080286123 | Oil pump system for vehicle - An oil pump system for a vehicle includes: a vane pump having a plurality of vanes which respectively project retractably from a plurality of vane accommodating grooves provided in a rotor so as to be brought into sliding contact with a cam surface, the vane pump being adapted to supply a hydraulic fluid to an automatic transmission; an electric power-driven oil pump for assisting the hydraulic pressure of the hydraulic fluid during an idling stop of the automobile; and an ECU for controlling its operation. During an idling stop, the hydraulic fluid is fed to the automatic transmission by the operation of the electric power-driven oil pump to assist the hydraulic pressure, while the hydraulic fluid is fed with pressure also to the vane accommodating grooves to press the vanes against the cam surface. | 11-20-2008 |
| 20110171042 | Non-rotating single post ram for inductor pump - An inductor pump system comprises a pump system, a ram system and a bearing assembly. The pump system includes a platen configured to engage a container. The ram system comprises a cylinder configured to support the pump system, and a piston extendable from the cylinder to vary axial positioning of the platen with respect to the container. The bearing assembly links the piston to the cylinder and is configured to prevent rotation of the pump system with respect to the ram system. | 07-14-2011 |
| 20120308407 | DUAL INJECTION AIRLIFT PUMP - The dual injection airlift pump has a hollow tubular body through which the liquid being pumped passes upward from the lower intake end to the upper outlet end. Air or other gas is injected into the liquid in the pump body, the less dense gas adding buoyancy to the liquid and entraining the liquid to rise toward the outlet end. The dual injection airlift pump includes two air injection stages, with the first or lower stage having a perforated interior sleeve allowing the gas to pass therethrough to be injected radially into the liquid. The second, upper stage has an impervious sleeve defining a gap between the sleeve and the interior surface of the pump wall, the lower end being sealed and the upper end open. Air is injected between the sleeve and pump wall, the air exiting at the upper or downstream end in an axially peripheral flow pattern. | 12-06-2012 |
| 417120000 | With condition responsive control of motive fluid vacuum or pressure generating means | 3 |
| 20090175735 | Pump with a direct thrust recovery device for driving fluids - The invention relates to a pump with a direct thrust recovery device for driving fluids, formed by pumping mechanisms formed by pistons ( | 07-09-2009 |
| 20110091333 | PNEUMATIC EVACUATION PUMP - A pneumatic evacuation pump including: an inlet assembly ( | 04-21-2011 |
| 20150118070 | AUTOMATIC DRAINING SYSTEM - An automatic draining system can include a driving mechanism, a first housing coupled to the driving mechanism, a vacuum pump and a bulkhead both coupled to the first housing, an inletting conduit and an outletting conduit both coupled to the bulkhead, a controlling device electrically coupled to the vacuum pump, a draining mechanism electrically coupled to the vacuum pump, and a first conduit and a second conduit both coupled to the first cylinder. The draining mechanism can include a first cylinder coupled to the bulkhead, a piston rod extending through the first cylinder; and
| 04-30-2015 |
| 417126000 | With float actuated control means | 6 |
| 417130000 | Control of motive fluid inlet (e.g., atmosphere, etc.) | 6 |
| 417131000 | With control of motive fluid outlet | 6 |
| 20120183415 | Steam powered pump - Embodiments of the present invention provide a non-electric pump. Gas pressure, typically steam or compressed air, is used to move a liquid, typically steam condensate, from a low pressure source to a high pressure destination. A tank fills with liquid from the source. Once full, the motive pressure is admitted to the tank and the pressure forces the liquid to the destination. When the tank is empty, the motive valve shuts and a vent valve opens to vent off the motive gas. A balanced trap plunger with an unattached float linkage provides for improved pump efficiency. | 07-19-2012 |
| 417132000 | With control of pumped fluid outlet | 1 |
| 20080240934 | Liquid pressure-feed device - A liquid pressure-feed device is provided wherein a working fluid discharge port can be connected to a liquid generation source side through an external pipe or can be connected to a liquid inlet port of a closed vessel without going through an external pipe. A closed vessel outer opening for opening a working fluid discharge port outwards of a closed vessel is provided and a communication passage for connecting the working fluid discharge port to a liquid inlet port is formed in the closed vessel. When connecting the working fluid discharge port to the liquid generation source side through an external pipe connected to the closed vessel outer opening, a ring member is used to provide closure between the working fluid discharge port and the liquid inlet port and provide communication between the working fluid discharge port and the closed vessel outer opening. Instead, when connecting the working fluid discharge port to the liquid inlet port, a plug member is used to close the closed vessel outer opening. | 10-02-2008 |
| 417133000 | With overcenter valve actuator means | 4 |
| 20080226469 | Liquid pressure-feed device - A liquid pressure-feed device is provided wherein, even with a third shaft disposed between a pivot shaft and a second shaft, a sub-arm positioned between the pivot shaft and the second shaft does not obstruct movement of the third shaft. A snap mechanism has a pivot shaft supported within a closed vessel, a float arm and a sub-arm both adapted to rotate about the pivot shaft, a first shaft supported by the float arm, a second shaft supported by the sub-arm, and a spring mounted between the first and second shafts. A liquid discharge valve has a third shaft supported by the float arm, a liquid discharge valve arm mounted to the third shaft, and a liquid discharge valve body mounted to the liquid discharge valve arm to establish and block communication between the interior of the closed vessel and a liquid discharge port. The third shaft is disposed between the pivot shaft and the second shaft and a window is formed in the sub-arm so as not to obstruct movement of the third shaft. | 09-18-2008 |
| 20080226470 | Liquid pressure-feed device - A liquid pressure-feed device having a reduced number of parts and a simple structure is provided. A snap mechanism has a pivot shaft supported within a closed vessel, a float arm and a sub-arm both adapted to rotate about the pivot shaft, a first shaft supported by the float arm, a second shaft supported by the sub-arm, and a spring mounted between the first and second shafts. A float is connected to the float arm and a change-over valve is connected to the sub-arm through a power transfer shaft. There is provided a stopper shaft supported within the closed vessel, there is formed in the float arm a window through which the stopper shaft extends and which restricts a rotational range of the float arm with floating of the float, and there is formed in the sub-arm a window through which the stopper shaft extends and which restricts a rotational range of the sub-arm with descent of the float. | 09-18-2008 |
| 20090016899 | OIL WELL PUMP APPARATUS - An oil well pumping apparatus for pumping oil from a well to a wellhead provides a tool body that is sized and shaped to be lowered into the production tubing string of the oil well. A working fluid is provided that can be pumped into the production tubing. A prime mover is provided for pumping the working fluid. A flow channel into the well bore enables the working fluid to be circulated from the prime mover via the production tubing to the tool body at a location in the well and then back to the wellhead area. A pumping mechanism is provided on the tool body, the pumping mechanism including upper and lower spur gear or gears. The upper spur gear is driven by the working fluid. The lower spur gear is rotated by the first spur gear. The upper and lower spur gears are connected with a common shaft. If upper pairs and lower pairs of spur gears are employed, each upper and lower gear are connected via a common shaft. The tool body has flow conveying portions that mix the working fluid and the produced oil as the oil is pumped. The pumping mechanism transmits the commingled fluid of oil and working fluid to the wellhead area where they are separated and the working fluid recycled. | 01-15-2009 |
| 20120148422 | LIQUID DISPENSER - A liquid dispensing mechanism adapted to achieve an increased inflow and an increased outflow rate and consisting of an inlet line adapted to receive liquid from an external reservoir, and adapted to release aid liquid via an outlet line, said mechanism comprising a pressure chamber adapted to store liquid and provide liquid level to fall or rise as a function of pressure, before release; a buffer chamber adapted to connect with said pressure chamber by means of non-return valves, and further adapted to store liquid before it flows into said pressure chamber, in order to increase flow coefficient of inlet line; float member in said pressure chamber, adapted to sense level of liquid in said pressure chamber by means of position of said float member; multiple valve actuator assembly adapted to actuate a pre-defined configuration of valves, with a time-delay between engaging or disengaging subsequent valves, for controlled engaging or disengaging pressure in a predetermined format; snap action valve actuating mechanism comprising fastener elements adapted to actuate said multiple valve actuator assembly in correlation with position of said float member. | 06-14-2012 |
| 417137000 | Cyclic pumping | 2 |
| 20090028721 | System for dewatering boreholes by means of alternative cycles of vacuum and exhaust, based on the principle of pneumatic displacement - A system of de-watering boreholes by alternating cycles of aspiration and expulsion based on pneumatic displacement, includes a double hose to be introduced into a borehole. The double hose includes a flexible outer hose and a flexible inner hose separated by an annular space therebetween, the double hose adapted to reach a full depth of the borehole. The outer hose has an outer diameter less than a diameter of the borehole to provide an annular clearance between the borehole and the outer hose. An upper closing element is connected to an upper end of the double hose outside of the borehole, and has two outlets which permit entry and exit of air and water. A lower closing element is attached to the double hose at a lower end thereof, and includes a foot valve, a filter, and a protective element to serve as a battering ram. | 01-29-2009 |
| 417138000 | Control by liquid level sensing means | 1 |
| 20080219859 | Automatic pressure-relieving apparatus for suction pump - An automatic pressure-relieving apparatus for a suction pump comprises a pipework provided at the cap. A first rod positioned in the pipework has an upper sealing ring arranged around the top periphery thereof, whereby the first rod can detachably seal the upper opening of the pipework. Moreover, the first rod is coupled with a second rod, which is pierced through the lower opening of the pipework and extending into the oil reservoir of the cylinder. The second rod further has a sealing component arranged at the periphery thereof for moving. upward and detachably sealing the lower opening of the pipework. Also, a control device is fastened to the bottom of the second rod so that when the raising oil surface lifts a float of the control device, the float can in turn drive the first and second rods to move upward. Thereby, the upper and lower openings of the pipework are opened and closed respectively, and the pressure in the pump can be automatically released through the opened upper opening. | 09-11-2008 |
| 417148000 | With vacuum generator | 3 |
| 20120114507 | BALANCING LIQUID PUMPING SYSTEM - Liquid from a body of liquid is pumped using two liquid columns connected to a sealable conduit containing gas. The liquid columns are also connected to another conduit having a switched valve. Pumping is initiated by extracting gas from the sealed conduit. Liquid exits one of the liquid columns through the switched valve. Lowering of the liquid level in one of the liquid columns moves gas in the sealed conduit. This in turn induces pumping liquid from the body of liquid in another one of the liquid columns. When the liquid level reaches a minimum in the liquid column, the switched valve changes position, blocking a liquid flow from the liquid column and allowing liquid in the other of the liquid column to exit. | 05-10-2012 |
| 20120207624 | Liquid Water Removal Apparatus - Liquid water removal apparatus that removes residual liquid water in a fluid conducting system by vaporizing the residual liquid water and drawing the vaporized water from the fluid conducting system. A vacuum pump (a) reduces the atmospheric pressure in the fluid conducting system to vaporize residual liquid water in the fluid conducting system, (b) draws from the fluid conducting system vaporized water, and (c) partially condenses the vaporized water drawn from the fluid conducting system. Vaporized water is conducted from the vacuum pump to a first water vapor condenser where vaporized water is condensed and residual vaporized water is conducted from the first water vapor condenser to a second water vapor condenser where the residual vaporized water received from the first water vapor condenser is condensed. | 08-16-2012 |
| 417149000 | With pressure generator | 1 |
| 20090142200 | TRANSPARENT VALVE BODY FOR DENSE PHASE PUMP - A dense phase pump for particulate material includes a pump chamber wherein material flows into the pump chamber under negative pressure and flows out of the pump chamber under positive pressure. A plurality of pinch valves are provided to control flow of material into and out of the pump chamber. The pinch valves are operated independent of each other and of the pump cycle rate. A modular design of the pump is provided. | 06-04-2009 |
