Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| RE40344 | Scroll machine with ported orbiting scroll member A scroll compressor includes a fluid injection system. The fluid injection system includes a fluid passage which extends from a position outside of the shell of the compressor to the fluid pockets created by the wraps of the scroll members. The fluid passage extends... | 05/27/2008 |
| 7232295 | Tempering method for a screw-type vacuum pump A screw-type vacuum pump (1) is tempered such that characteristics of the pump are not substantially altered when the pump is subjected to thermal stress. In order to achieve said aim, cooling is adjusted according to an operating state of the screw-type vacu... | 06/19/2007 |
| 7201569 | Screw compressor Disclosed is a screw compactor comprising two screw rotors which are disposed in screw rotor bores inside a compressor housing and compress a coolant that enters at a coolant inlet and discharge said coolant at a coolant outlet, and a coolant inlet that is arranged ... | 04/10/2007 |
| 7097436 | Apex split seal A rotary machine including a rotor having apexes provided with apex seals achieves better efficiency through the use of apex split seals which minimize leakage across the apex seals to thereby allow operation at relatively high pressure values. ... | 08/29/2006 |
| 7052249 | Air/oil separating tank—thermostatic valve—minimum pressure valve—oil cooling radiator—compressed air cooling radiator group A group is provided for a compressed air distribution unit of the type including an intake regulator, an oil bath-screw type compressor, an air/oil separating tank, a minimum pressure valve, an air cooling radiator, a pressurized air collection tank, a thermostatic ... | 05/30/2006 |
| 6958058 | Methods and devices for pumping fluid and performing surgical procedures Devices and methods of use of such devices for pumping fluid and for use in surgical procedures preferably include vacuum-driven pumps for providing irrigation and suction functions to the surgical field. Such pumps may be freestanding, external to or integrated int... | 10/25/2005 |
| 6866490 | Water-injected screw compressor The invention relates to a water-injected screw compressor which comprises a compressor element (1) with an interior space (3), a suction conduit (7) which connects to an inlet part (6), situated at the top of this interior space (3 | 03/15/2005 |
| 6739853 | Compact control mechanism for axial motion control valves in helical screw compressors An axial slide valve is provided with an axially extending fluid chamber at each end with one chamber receiving a spring and being acted on by suction pressure and the other chamber coacting with a fixed piston and being acted upon by discharge pressure or the like ... | 05/25/2004 |
| 6719546 | Arrangement for controlling the flow of a coolant fluid in a compressor The invention comprises an arrangement for controlling the flow of a coolant fluid in a compressor, in particular in a rotary compressor, in which a coolant-fluid inlet for coolant fluid discharged from the compressor and a coolant-fluid outlet for returning the coo... | 04/13/2004 |
| 6701220 | Industrial robot device An industrial robot including a manipulator having a control system. The manipulator includes a common gear housing having first and second inner compartments connected with a passage channel. First and second gears are arranged in the first and second in... | 03/02/2004 |
| 6616431 | Scroll-type compressors A scroll-type compressor has a piston valve mechanism for controlling the feeding of lubricating oil to slidable parts of the compressor. The piston valve mechanism includes a cylinder bore that connects a medium pressure chamber and a low pressure chambe... | 09/09/2003 |
| 6612820 | Screw compressor having sealed low and high pressure bearing chambers A method and apparatus for compressing process fluids in a working chamber having a male and a female rotor, each supported by shafts in a first and a second bearing chamber maintained at low and high pressures at least equal to 90% of the low and high pr... | 09/02/2003 |
| 6575720 | Bearing and shaft cooling device The bearing cooling device causes cooling media to flow into the interior of a journal bearing 8 for supporting a shaft part 7 by lubrication of high viscous fluid and the interior of the shaft part 7 to cool the shaft part 7 and the bearing 8. At this ti... | 06/10/2003 |
| 6494696 | Scroll compressor A scroll compressor comprising: a vessel; a compressing mechanism provided within said vessel, the compressing mechanism comprising an orbiting scroll and a non-orbiting scroll each having a spiral wrap formed in a base plate and an Oldham ring for preven... | 12/17/2002 |
| 6409489 | Compressor installation with water-injected compressor element The invention concerns a compressor installation with a water-injected compressor element (1) having a water cycle (6) and a water supply device (15) for supplying water to the water cycle (6), containing a water supply line (16) with a controllable valve... | 06/25/2002 |
| 6375443 | Screw rotor type wet vacuum pump A feed pipe 26 for a sealing water is connected to a housing of the pump to communicate with an enclosed chamber which is defined between a position in which a helical seal line of screw rotors 17 isolates the enclosed chamber from a suction port 15 of th... | 04/23/2002 |
| 6350111 | Scroll machine with ported orbiting scroll member A scroll compressor includes a fluid injection system. The fluid injection system includes a fluid passage which extends from a position outside of the shell of the compressor to the fluid pockets created by the wraps of the scroll members. The fluid pass... | 02/26/2002 |
| 6315535 | Screw vacuum pump having valve controlled cooling chambers A discharge side housing 3 has a third cooling water chamber 19 communicating with a first cooling water chamber 7 of a main housing 1 through a cooling water passage 26. The third cooling water chamber 19 is connected to a cooling water outlet pipe 27 wh... | 11/13/2001 |
| 6174148 | Water jet type air compressor system, its starting method, and water quality control method thereof Upon starting instruction of a compressor before the compressor is started, a pressurized water jet line 20 is opened and pressurized water is jetted to the inside of the compressor. By this manner, a dry operation with rotors and a mechanical seal kept i... | 01/16/2001 |
| 6129532 | CO2 compressor A CO2 compressor is disclosed for forcing and moving a lubricant under discharge pressure. If the oil path is reduced in size or a pressure reducing part is inserted to handle the large differential pressure caused between the discharge pressur... | 10/10/2000 |
| 6102683 | Compressor installation having water injection and a water treatment device The invention relates to a compressor installation (10) with an injection-cooled compressor (12) and a method for compressing a gas in a compressor installation. In order to allow for an environmentally acceptable compression of gaseous media, the compres... | 08/15/2000 |
| 5954482 | Compressor having pressure eliminating means A gas compressor has a first chamber for receiving a low pressure refrigerant gas. A main body has a second chamber for drawing in the low pressure refrigerant gas from the first chamber and undergoing a compression operation to compress the low pressure ... | 09/21/1999 |
| 5871338 | Vacuum pump with a gas ballast device The invention pertains to a vacuum pump (1) with a closable line (63, 102) through which gas ballast can be fed into the pump chamber (8, 9); to eliminate the danger that a recipient hooked up to the vacuum pump may be charged with air in the event of a p... | 02/16/1999 |
| 5769617 | Vane-type compressor exhibiting efficiency improvements and low fabrication cost A rotary sliding-vane compressor is described which contains a single rotor with compressor and expander sections, together with a reduced number of parts and efficiency improvements compared to conventional compressors.... | 06/23/1998 |
| 5697771 | Vacuum pump with oil separator The invention relates to a vacuum pump (1) with an oil separator (42) connected downstream of its outlet (33) and with a duct (45, 46) through which the oil separated in the oil separator (42) is returned to the vacuum pump (1); to feed back the oil in a ... | 12/16/1997 |
| 5678986 | Fluid displacement apparatus with lubricating mechanism A fluid displacement apparatus includes a housing having a fluid inlet and a fluid outlet. A suction chamber is formed between one end of the displacement mechanism and the housing and communicates with the fluid inlet port. A discharge chamber is formed ... | 10/21/1997 |
| 5573387 | Vacuum pumps A rotary vacuum pump having a low vacuum stage and a high vacuum stage. Each stage includes a stator body having a bore and a rotor mounted eccentrically in the bore to form a cavity between the stator body and the rotor. The rotor of each stage has two v... | 11/12/1996 |
| 5341658 | Fail safe mechanical oil shutoff arrangement for screw compressor Apparatus as disposed internal of a refrigeration screw compressor which, upon compressor shutdown, shuts off the flow of oil injected into the compressor's working chamber and the oil which is directed to the compressor rotor bearings and which at compre... | 08/30/1994 |
| 5263832 | Air-cooled oil-free screw compressor An air-cooled oil-free screw compressor is provided with a first lubricating oil circulating flowpassage 1 which extends from an oil tank 20 via an oil pump 21 and an air heat exchanger 22 to cooling jackets 15 and 16 for cooling compressor bodies 12 and ... | 11/23/1993 |
| 5253988 | Gear pump Method and apparatus for on-site cleaning of a gear pump by coupling the gear pump outlet to the gear pump inlet and to the inlet end of the passage and which bypasses the bearing and is preferably controlled by a valve element which can block off the byp... | 10/19/1993 |
| 5221199 | Lubrication oil volume control device in a scroll type compressor A scroll compressor includes a stationary scroll and a rotary scroll rotated by a motor-driven crankshaft. The crankshaft has parallel passages therein which communicate at their lower ends with a pool of lubricating oil. A first of the passages coincides... | 06/22/1993 |
| 5201648 | Screw compressor mechanical oil shutoff arrangement An integral member is disposed internal of a refrigeration screw compressor which, upon compressor shutdown, shuts off the flow of oil injected into the compressor's working chamber as well as the oil directed to the compressor rotor bearings and which, a... | 04/13/1993 |
| 5181414 | Pumping apparatus for pumping a gas by means of an oil-sealed vane pump and application to helium leak detectors A pumping apparatus for pumping a gas having application to helium leak detectors has a vane and oil-seal type vacuum pump immersed in a closed tank (9) partially filled with oil (10). The apparatus also includes an oil pump (20) for renewing the oil seal... | 01/26/1993 |
| 5174740 | Hermetic type scroll compressor with regulation of lubricant to the inlet A scroll compressor includes a stationary scroll and an orbit scroll for circulating refrigerant. Lubricant is introduced into the refrigerant at an inlet side of the compressor to maintain a seal between the scrolls. Lubricant is separated from the refri... | 12/29/1992 |
| 5174741 | Liquid injecting type oil-free screw compressor A liquid injecting type oil-free screw compressor is capable of preventing the generation of polymer in any part inside the compressor main body. A temperature controller detects the gas temperature in a discharge passage of the compressor main body, and ... | 12/29/1992 |
| 5066202 | Method and apparatus for delivering oil to a multi-stage pump A method and apparatus for delivering oil into a pump chamber of a high-vacuum stage of a multi-stage pump. The method includes the steps of sensing a first pressure at an intake region of the high-vacuum stage of the pump, and sensing a second pressure a... | 11/19/1991 |
| 5064452 | Gas removable pump for liquid A gas removable pump for liquid comprising a housing having an inlet for introducing the liquid thereinto and an outlet for feeding the liquid therefrom, a drive shaft extending into the housing and a rotary pump disposed within the housing, the rotary pu... | 11/12/1991 |
| 5033944 | Lubricant circuit for a compressor unit and process of circulating lubricant A lubricant circuit and a process for circulating a lubricant through such lubricant circuit of a compressor unit incorporating a planetary rotating compressor having a piston in an opening of a cylinder-piston. One embodiment of a circuit and one embodim... | 07/23/1991 |
| 4995797 | Rotary screw vacuum pump with pressure controlled valve for lubrication/sealing fluid A screw vacuum pump which includes a pair of screw rotors meshing each other with a small gap defined therebetween. A closing valve is provided in an oil circulation line leading from an oil stripper to a rotor chamber accommodating the screw rotors. A pr... | 02/26/1991 |
| 4984974 | Screw type vacuum pump with introduced inert gas The screw type vacuum pump comprises a pump casing having a suction inlet and a discharge outlet, and a pair of rotors incorporated within the pump casing and meshing with each other to rotate in synchronized manner. The vacuum pump evacuates a reaction v... | 01/15/1991 |
