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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 7794211 | Pump System with a vacuum source coupled to a separator A self priming pump system that includes a motor coupled to a centrifugal pump for driving the centrifugal pump. A separator having a reservoir is provided for storing a limited amount of pumped fluid in advance of the centrifugal pump. A vacuum source provides a va... | 09/14/2010 |
| 7331769 | Pumping system A pumping system including a fluid inlet line and a primary pump for the fluid. The primary pump includes an impeller in an impeller chamber, with the impeller chamber adapted to receive fluid from the inlet line. A suction chamber is above the impeller chamber, wit... | 02/19/2008 |
| 7166611 | Pharmaceutical compositions having appetite suppressant activity A pharmaceutical composition contains an extract obtainable from a plant of the genus Trichocaulon or Hoodia containing an appetite suppressant agent having the formula (1). A process for obtaining the extract and a process for synthesizing compound (1... | 01/23/2007 |
| 7121813 | Reverse rotation preventing structure of centrifugal compressor The invention relates to a reverse rotation preventing structure of a centrifugal compressor. The reverse rotation preventing structure of the centrifugal compressor comprises: a discharge pipeline of the centrifugal compressor; a suction pipeline of the centrifugal... | 10/17/2006 |
| 7059202 | Multi-axis force/torque sensor and data acquisition system A multi-axis force analyzer and data acquisition system is disclosed. Using non-invasive structure, parts to be tested are analyzed without obstructing user access or defacing the object in any way. Accordingly, the forces required to open and close a container can ... | 06/13/2006 |
| 6585493 | Hygienic self-priming centrifugal pump A hygienic, self-priming centrifugal pump (1) with a pump housing (4) provided with an inlet opening (2) and a pressure connecting piece (3), where an impeller wheel (7) can rotate inside said pump housing. The inlet opening (2) is connected with a liquid... | 07/01/2003 |
| 6120252 | Gas separation control in a centrifugal pump/vacuum pump A centrifugal and vacuum pump combination in which the impeller of a centrifugal pump is disposed on the same shaft as a rotor of the vacuum pump, with a gas outlet extending between the centrifugal and vacuum pumps, is operated by positively controlling ... | 09/19/2000 |
| 5899668 | Two-stage liquid ring pumps having separate gas and liquid inlets to the second stage A two-stage liquid ring pump has an interstage structure which promotes separation of the gas and liquid discharged from the first stage. The second stage has separate gas and liquid inlets for respectively admitting the separated gas and liquid to the se... | 05/04/1999 |
| 5842833 | Gas separation control in a centrifugal pump vacuum pump A centrifugal and vacuum pump combination in which the impeller of a centrifugal pump is disposed on the same shaft as a rotor of the vacuum pump, with a gas outlet extending between the centrifugal and vacuum pumps, is operated by positively controlling ... | 12/01/1998 |
| 5785501 | Liquid pump with degasser and integrated vapor recovery option The invention relates to a pumping device for volatile liquid, comprising a closed pump housing having an intake connected to a supply reservoir and at least one discharge connected to a delivery means. The device further comprises a liquid pump with a li... | 07/28/1998 |
| 5769609 | Liquid ring compressor having a distribution groove for sealing A liquid-ring compressor having a rotor mounted in a compressor housing. The rotor is mounted eccentrically relative to the center axis of the compressor housing. At least one control disk is arranged on one of the end faces of the rotor. The control disk... | 06/23/1998 |
| 5735674 | Liquid-ring gas pump Liquid-ring gas pump with a working space containing an overhung impeller (17) and a connection casing (2) which is separated from the working space by a control plate (13). This casing contains, on one side of a hub space (11) suitable for the accommodat... | 04/07/1998 |
| 5595477 | Vacuum pumping stand A vacuum pumping stand for the cyclic pumping-down of containers and for maintaining an operating vacuum in the containers, for the pumping-down of the container. The vacuum pumping stand has a first and a second vacuum pump which are arranged in series a... | 01/21/1997 |
| 5456574 | Centrifugal pump with starting stage A novel centrifugal pumping system is disclosed for supplying fuel to aircraft gas turbines. The system has a common rotor with two different sets of impeller blades on opposite sides. A regenerative/liquid-ring starting pump is located on one side of the... | 10/10/1995 |
| 5413466 | Unified fuel pump assembly A unified fuel pump assembly combines a vane-type pump and a booster stage for the inlet of the vane-type pump, in a unitary structure to substantially reduce "windage" losses caused by relatively moving parts. The unified structure also includes an elect... | 05/09/1995 |
| 5366347 | Suspension pump with built-in variably eccentric liquid ring pump A pump for pumping pulp, comprising a first impeller (12) for pumping the pulp in fluidized state, and a gas evacuation pump (23) of liquid ring type comprising a pump housing (24) with a chamber (25) and a second impeller (26) rotating therein for evacua... | 11/22/1994 |
| 5295794 | Liquid ring pumps with rotating liners Liquid ring pumps with rotating liners supported by a bearing fluid (pressurized liquid or compressed gas) have a bearing fluid distribution system that compensates for the radially unsymmetric load on the rotating liner. If the liner bearing fluid is com... | 03/22/1994 |
| 5244352 | Multi-stage vacuum pump installation A multi-stage vacuum pump installation having an oil-lubricated or dry-running mechanical displacement pump located in the atmospheric stage. The oil-lubricated or dry-running pump is preceded on the vacuum side by at least one additional pump which is a ... | 09/14/1993 |
| 5213479 | Liquid ring pumps with improved housing shapes In liquid ring gas pumps of the type having a rotor rotatably mounted in a stationary housing for forming a quantity of pumping liquid into a recirculating ring inside the housing, fluid friction loss between the liquid and the housing is reduced by shapi... | 05/25/1993 |
| 5131817 | Two-stage pumping system In a gas pumping system including a first stage rotary lobe pump for pumping gas to a second stage liquid ring pump, cooling liquid is injected into the compression zone of the rotary lobe pump so that the liquid mixes intimately with the gas being compre... | 07/21/1992 |
| 5100300 | Liquid ring pumps having rotating lobe liners with end walls In a liquid ring pump having a rotating liner inside a stationary housing for helping to reduce fluid friction losses, at least one end, and preferably both ends of the liner are partly closed to more completely contain the liquid ring in order to further... | 03/31/1992 |
| 5096386 | Integral liquid ring and regenerative pump The problem of space and weight limitations for liquid ring pumps and regenerative pumps in aerospace applications is solved by a pump having a housing defining a first chamber (22) and a second chamber (24) independent of the first chamber. An impeller (... | 03/17/1992 |
| 5078573 | Liquid ring pump having tapered blades and housing A liquid ring vacuum pump includes a vacuum pump housing composed by two opposed end walls spaced by an annular wall defining a vacuum pump chamber; a shaft extends into the vacuum pump chamber; a rotor is mounted on the shaft and is arranged eccentricall... | 01/07/1992 |
| 5073089 | Liquid-ring compressor In a liquid-ring rotary compressor having a control element with a suction port, a pressure orifice, and a plurality of supplementary ports in front of the pressure orifice with respect to the direction of rotation of the compressor impeller, each supplem... | 12/17/1991 |
| 5061151 | Centrifugal pump system with liquid ring priming pump The problem of minimizing size and weight parameters in an impeller-type centrifugal pump system (10), including a liquid ring priming pump (32), is solved by providing a housing (12) defining a fluid inlet (26). An impeller (16) is rotatably mounted down... | 10/29/1991 |
| 4984432 | Ericsson cycle machine An Ericsson cycle machine is disclosed which can be used for refrigeration, liquefaction of nitrogen or as an engine. The invention includes a liquid ring compressor linked to a liquid ring expander by a gas loop that includes a recuperator. As a refriger... | 01/15/1991 |
| 4946349 | Water ring vacuum pump A pumping system comprising a liquid ring vacuum pump including a casing and a rotatable runner. A Pitot pump including a casing, a Pitot tube, an impeller and a drum, the impeller and the drum being rotatably mounted in the casing, and the Pitot tube bei... | 08/07/1990 |
| 4883410 | Fuel supply systems A liquid fuel pump arrangement for delivering fuel to an engine comprises a liquid-ring pump including a motor driven bladed impeller rotor which is located eccentrically within a cylindrical bore of a chamber forming part of a hollow pump body structure.... | 11/28/1989 |
| 4854824 | Vapor separating and metering pump A two-staged vapor separating and metering fuel pump for an aircraft includes a housing (12) divided into a liquid ring section, a metering section and a motor section. Vapor-laden fuel enters the liquid ring section through a fuel inlet opening (14) and ... | 08/08/1989 |
| 4762467 | Method for controlling the pressure ratio of a jet pump In a jet pump, the suction pressure (Po) generated may be kept constant within predetermined limits and times by varying the pressure ratio f(p) providing a prescribed value for the pressure ratio f(p) is determined by computer-aided iterative changing of... | 08/09/1988 |
| 4699570 | Vacuum pump system A vacuum pump aggregate utilizes a microprocessor in conjunction with pressure and temperature sensors and motor control circuits to regulate the pressure by varying the speed of one or more vacuum pumps. Measured temperature and/or pressure values are co... | 10/13/1987 |
| 4505645 | Process and installation for rapidly creating a high vacuum using a single stage liquid ring pump An installation for rapidly obtaining a high vacuum, comprising two compression stages, the first of which is a liquid ring vacuum pump, characterized in that means are provided for instantaneously coupling or dissociating the first stage and the second s... | 03/19/1985 |
| 4484457 | Liquid-ring vacuum pump preceded by a precompressor In a vacuum generating system having a liquid ring vacuum pump preceded in a gas flow path by a precompressor and followed by a liquid separator, the precompressor is driven by steam produced in a heat exchanger in contact with the working fluid of the va... | 11/27/1984 |
| 4385868 | Systems for evacuating process fluids having condensable and incondensable components Systems for evacuating process fluids having condensable and incondensable components, especially those including corrosive constituents, include a condenser for condensing at least part of the condensable component and discharging the condensate from the... | 05/31/1983 |
| 4315717 | Evacuation system with precondenser A high capacity evacuation system employing a precondenser receiving process fluids having liquid and gaseous phases, a first stage jet diffuser and a second stage liquid ring pump for handling the process fluids and in which system the motivating fluid f... | 02/16/1982 |
| 4260335 | Process for the compression of steam and thermal circuits for its implementation A process for the compression of steam, particularly very low pressure saturated steam; and thermal circuits for its implementation. For the compression of the steam there is used at least one liquid ring compressor using water as compression agent. Principal ... | 04/07/1981 |
| 4225288 | Pump set comprising a liquid ring vacuum pump preceeded by a compressor A pump set comprising a compressor followed by a liquid ring vacuum pump with the two pumps matched to each other so that a relatively small liquid ring vacuum pump can draw and maintain vacuum under 40 Torr.... | 09/30/1980 |
| 3973879 | Liquid ring compressor In a liquid ring compressor with a liquid separator which has a liquid take-off point in its housing which is fed by the liquid ring co-rotating with the impeller and connected through connecting lines outside the housing to internal auxiliary liquid circ... | 08/10/1976 |
