Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 7654804 | Fluid displacement apparatus having pressure sensing device A fluid displacement apparatus includes a housing for receiving a refrigerant, a driving shaft rotatably received in the housing, a magnetic clutch attached to the driving shaft for rotation transmitting purposes, a fixed scroll disposed in the housing, an orbiting ... | 02/02/2010 |
| 7327045 | Fuel delivery system and method providing regulated electrical output In a mobile fuel delivery vehicle, providing bulk aircraft fuel from a pressurized fuel reservoir to an aircraft, a method of regulating electrical output of an electrical power source, includes the steps of: (a) receiving, in a fluid path, the bulk aircraft fuel fr... | 02/05/2008 |
| 7326917 | Wear monitor for turbo-machine A wear determination device for determining vibration in a turbine engine component to reduce wear in a turbine engine. The wear determination device may be capable of measuring vibrations in a turbine engine component. The vibration measurement may be used to deter... | 02/05/2008 |
| 7322806 | Scroll compressor with externally installed thermostat A thermostat for sensing an unduly high temperature in a sealed compressor, which is a scroll compressor in the disclosed embodiment, extends through the housing of the sealed compressor into the body of a non-orbiting scroll. Since the thermostat extends through th... | 01/29/2008 |
| 7318483 | Fire fighting foam injection system with auto-start feature A fire fighting vehicle of the type having a system for introducing a liquid foam concentrate into a water delivery hose so that the percentage concentration of foamant in the mixture remains at a predetermined set value irrespective of variations in the water flow ... | 01/15/2008 |
| 7284495 | Shaftless radial vane rotary device and a marine propulsion system using the device A radial vane fluid motor or pump has an open ended tubular rotor having a cylindrical outer surface rotatably mounted in a tubular stator having its inner surface contoured to provide successive portions of increased and decreased spacing relative to the rotor body... | 10/23/2007 |
| 7281912 | Compressor having a safety device being built in at least one of the screw plugs of the oil-separator A compressor is provided with an oil separator for separating part of the lubricating oil contained in the compressed refrigerant, path arrangement for connecting a separation chamber of the separator and a delivery port of the compressed refrigerant, the path arran... | 10/16/2007 |
| 7272894 | Drum dryer A drum dryer provided with a liquid splash and scatter preventing equipment, which enables continuous operation by preventing a scattering liquid from making dry powder in the case in which the equipment is provided above a neighborhood of a liquid concentration sec... | 09/25/2007 |
| 7255546 | Spindle for a vane motor The spindle of a vane motor is designed to enhance the power, speed and torque by undercutting the spindle adjacent to the vanes on the power stroke side to increase the working area of the vanes and by adding slots intermediate the vane formed in said spindle and e... | 08/14/2007 |
| 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 |
| 7216526 | Method and apparatus for measuring vane wear in a sliding vane rotary pump The amount of wear on the vanes of a sliding vane rotary pump is determined by inserting a wear inspection dip stick into a wear inspection port providing in a housing of the sliding vane rotary pump. The wear dipstick includes one or more mark providing an indicati... | 05/15/2007 |
| 7134849 | Molded disposable pneumatic pump A mechanical pump having a unitary construction such that the fluid being pumped is prevented from leaking without requiring the use of discrete seal elements. The absence of discrete seal elements and integral coupling of various components of the pump substantiall... | 11/14/2006 |
| 7083393 | Combination sight glass, strainer and orifice A sight glass block for inspecting oil flow through a scavenge line for an oil separation system in a compressor comprises a combination of a sight glass for inspecting the oil flow, a strainer for cleaning the oil flow and an orifice for metering the oil flow in a ... | 08/01/2006 |
| 7050886 | Chemical dispensing system for a portable concrete plant A computer controlled pumping and measuring system is used to dispense chemicals into a concrete mix. The redundant use of positive displacement pumps and flow meters ensure that any problems with the chemical dispensing are immediately caught. The computerized cont... | 05/23/2006 |
| 6969242 | Compressor To counter downstream oil infiltration through a shaft seal, a small portion of the compressed fluid is diverted from downstream to upstream through a passageway in a rotor. The diverted fluid is introduced to a space at a downstream side of the seal. An exemplary i... | 11/29/2005 |
| 6957952 | Fiber optic system for detecting pump cycles A fiber optic system for detecting a stroke of a pump, the fiber optic system including a first fiber optic line configured for directing light onto a portion of the pump that moves during the stroke of the pump. The system further includes a second fiber optic line... | 10/25/2005 |
| 6913451 | Vacuum pump with fail-safe vanes A vacuum vane pump for generating a vacuum condition for aircraft instruments includes a rotor having a peripheral surface eccentrically mounted in a housing having a confrontingly opposed inner surface so that the opposed surfaces define a crescent-shaped chamber. ... | 07/05/2005 |
| 6877966 | Apparatus for indicating remaining life expectancy of a rotary sliding vane pump The present invention is directed to an apparatus for determining vane wear in rotary sliding vane pumps that operate using slideable vanes, while the pump is in operation. The invention includes a structure that allows a predetermined amount of leakage from a pumpi... | 04/12/2005 |
| 6769886 | Rotary vane pump with vane wear access port and method A rotary vane pump, including a housing within which is rotatably mounted a rotor having a plurality of slots therein with a vane positioned for sliding movement within each of the slots. An access port is formed in the housing communicating with the rotor at a refe... | 08/03/2004 |
| 6752604 | Automatic wear indicator for sliding vane vacuum and gas pressure pumps Tracer material, encapsulated within a cavity of the vanes of a sliding vane pump, which is released into the discharge conduit when the vanes reach their predetermined wear limit, acting as a wear indicator. ... | 06/22/2004 |
| 6695593 | Fiber optics systems for high purity pump diagnostics A pump for ultra-pure fluids comprises a flexible diaphragm separating a fluid chamber from an air chamber. The diaphragm creates an airtight seal between the fluid chamber and the air chamber. Any leak from the fluid chamber into the air chamber is detec... | 02/24/2004 |
| 6657217 | Probe for sensing movement in a compressor system A probe is used to detect axial movement of a rotating part such as a shaft. The probe includes a probe tube portion that protrudes into an annular groove on the rotating part. When the rotating part moves axially, one or the other side surfaces of the gr... | 12/02/2003 |
| 6565337 | Method and apparatus for inspecting vanes in a rotary pump The present invention is directed to an apparatus and method for determining vane wear in rotary vane pumps that operate using slideable vanes. A view port is formed in an end of the pump housing. The view port is dimensioned such that a width of the port... | 05/20/2003 |
| 6450789 | Method and apparatus for inspecting vanes in a rotary pump The present invention is directed to an apparatus and method for determining vane wear in rotary vane pumps that operate using slideable vanes. A view port is formed in an end of the pump housing. The view port is dimensioned such that a width of the port... | 09/17/2002 |
| 6402486 | Free-diaphragm pump A pump for ultra-pure fluids comprises a flexible diaphragm separating a fluid chamber from an air chamber. The diaphragm creates an airtight seal between the fluid chamber and the air chamber when a self-centering and trapezoidal shaped wedge compressive... | 06/11/2002 |
| 6375434 | Pump/meter combination An integrated pump and meter having a spindle axially extending in the direction of the flow of fluid for pumping and metering the flow of fluid. A volume of fluid pumped is calculated as a function of spindle rotation. In one particular of embodiment, a ... | 04/23/2002 |
| 6371742 | Cooling device The invention concerns a cooling device wherein the chamber (2) represents cooling channels arranged in the thickness of the pump cylinder walls. The steam flux (7) generated by the heat to be evacuated reaches the upper end of the condenser (1) and comes... | 04/16/2002 |
| 6358027 | Adjustable fit progressive cavity pump/motor apparatus and method The present invention provides an adjustable rotor and/or stator, so that the interference fit and/or clearance can be adjusted. The rotor and/or stator are tapered to provide a difference in fit between the rotor and stator by longitudinal adjustment of ... | 03/19/2002 |
| 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 |
| 6244844 | Fluid displacement apparatus with improved helical rotor structure A fluid displacement apparatus includes a housing defining a chamber therein having a first port and a second port. First and second helical rotors with opposing pitches are meshed within the chamber, in fluid communication with the first and second ports... | 06/12/2001 |
| 6213740 | Flexible impeller pump having a transparent safety cover A flexible impeller pump having a transparent safety cover. The pump includes a flexible impeller and a housing having a pump and cover. The pump end cover comprises a transparent safety cover which is capable of attachment to the housing. A transparent h... | 04/10/2001 |
| 6168385 | Rotary device with means for monitoring and adjusting the clearance between the rotors A rotary device (11) has a first rotor (12) rotatable about a first axis and having at its periphery a recess (14). A second rotor (13) is counter-rotatable to said first rotor (12) about a second axis, parallel to said first axis, and has a radial lobe (... | 01/02/2001 |
| 5879138 | Two-stage rotary vane vacuum pump The invention pertains to a rotary vane vacuum pump (1) with a high vacuum stage (9, 22), with a fore-vacuum stage (8, 21), with a substantially cylindrical rotor (3) which has bearing and anchor segments (11 and 21, 22), a bearing segment (11) being situ... | 03/09/1999 |
| 5879146 | Stepped wear indicator for a radial compressor The invention includes a wear indicator for a radially extensible vane compressor. The indicator is an elongate member having two longitudinal sections with a step inbetween. The step catches on a mating step formed in the compressor rotor when it is good... | 03/09/1999 |
| 5800140 | Compact scroll fluid device A compact scroll fluid device includes a pair of wrap support elements with one of the wrap support elements having an inner axial surface formed with an involute spiral recess and the other of the wrap support elements having an involute spiral wrap memb... | 09/01/1998 |
| 5791884 | Scroll compressor with sealed terminal A scroll compressor has a stationary scroll and a swivel scroll engaged with each other in a hermetic housing. A sealed terminal is provided to send signals outside of the housing from a sensor that is provided within the housing. The sealed terminal is i... | 08/11/1998 |
| 5727933 | Pump and flow sensor combination A pump for use in additive systems such as foam chemical additive systems for fire fighting water, the pump including impeller elements and flow meter elements in a common casing. The pump casing provides a gear pump arrangement using two enmeshed gears o... | 03/17/1998 |
| 5704767 | Integral pump and flow meter device A pump housing is provided with a conduit extending through the housing between a pump inlet and pump outlet. A pump device is disposed within the housing and in communication with the conduit to pump fluid therethrough. A fluid flow meter also is dispose... | 01/06/1998 |
| 5601414 | Interstage liquid/gas phase detector A positive displacement rotary axial screw pump which comprises a series of sealed closures formed by meshing of the rotors for building the internal pressure gradient of the pump from the pump inlet to its outlet. A programmable logic circuit is provided... | 02/11/1997 |
| 5511952 | Refrigerant displacement apparatus with an improved thermal sensing device A scroll type fluid displacement apparatus includes a housing in which interfitting fixed and orbiting scrolls are disposed. The outer surface of the end plate of the fixed scroll and the inner surface of the housing are in fluid tight contact so that the... | 04/30/1996 |
