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| Number | Title | Issue Date |
| 8096793 | Ductile cast iron scroll compressor A scroll compressor includes a scroll member having a base and a generally spiral wrap that extends from the base to define a portion of a compression chamber. The scroll member is made of a cast iron material comprising a microstructure having graphite nodules.... | 01/17/2012 |
| 8079228 | Refrigerant system with multi-speed scroll compressor and economizer circuit A scroll compressor is provided with a multiple-speed motor. A control selects a speed for operating the motor, along with selecting between several available options for the system capacity adjustment to meet external load demands in a most efficient and reliable m... | 12/20/2011 |
| 7938634 | Self-modulated scroll compressor with optimized built-in volume ratio A self-modulating scroll compressor includes a built-in volume ratio that is defined as the ratio of a volume of a compression pocket just after completion of suction, i.e. at a beginning of a compression cycle, to the volume of the compression pocket just prior to ... | 05/10/2011 |
| 7857603 | Piezoelectric drive for scroll compressor Compressors are defined by two relatively moving members, which have a relative orbital movement between the two. Piezoelectric elements are associated with each of the two moving members to cause the moving members to result in the orbital movement. ... | 12/28/2010 |
| 7721562 | Refrigerant system with multi-speed scroll compressor and economizer circuit A scroll compressor is provided with a multiple-speed motor. A control selects a speed for operating the motor, along with selecting between several available options for the system capacity adjustment to meet external load demands in a most efficient and reliable m... | 05/25/2010 |
| 7686599 | Scroll compressor with device to limit orbit radius A scroll compressor has a device which may be actuated to limit the orbit radius of the orbiting scroll. The device is moveable between an unactuated position at which it is spaced from a hub for the scroll compressor, and an actuated position at which it limits the... | 03/30/2010 |
| 7674098 | Scroll compressor with vapor injection and unloader port A scroll compressor is provided with a passage for providing both an unloader function and an economizer injection function. This common passage communicates with separate ports. The ports that are exclusively used for by-pass unloading operation are open only durin... | 03/09/2010 |
| 7641456 | Scroll compressor with back pressure chamber cavity for assisting in start-up A scroll compressor is provided with a cavity in its back pressure chamber to increase a volume of the back pressure chamber. In this manner, at start-up, the back pressure chamber will not be effective to bias the two scroll members together until this enlarged vol... | 01/05/2010 |
| 7547195 | Scroll compressor with high side to low side oil bleed valve A scroll compressor is provided with an oil bleed valve that selectively communicates a discharge pressure chamber to a suction pressure chamber. The oil bleed valve controls flow of hot oil through a passage and onto a safety shutoff switch for an electric motor. | 06/16/2009 |
| 7481632 | Scroll compressor with an oil passage plug to limit oil flow A scroll compressor is provided with an orifice plug inserted into an oil passage. The plug has an opening which is positioned to restrict the flow of oil through the passage, and in particular at higher speeds. The opening is formed at an outer periphery of the plu... | 01/27/2009 |
| 7476092 | Scroll compressor with tapered slider block The drive connection between an eccentric pin and a slider block in a scroll compressor is angled such that any vertical force between the two will drive the slider block away from the orbiting scroll member. In this manner, manufacturing tolerances will not result ... | 01/13/2009 |
| 7431576 | Ductile cast iron scroll compressor A scroll compressor includes a scroll member having a base and a generally spiral wrap that extends from the base to define a portion of a compression chamber. The scroll member is made of a cast iron material comprising a microstructure having graphite nodules.... | 10/07/2008 |
| 7396213 | Oil utilized as motor protector trip for scroll compressor A scroll compressor has lubricant flow which communicates lubricant onto a motor protector when adverse conditions are present causing the motor protector to trip the motor and stop further rotation. The lubricant is returned to an oil sump through a normal return p... | 07/08/2008 |
| RE40399 | Low charge protection vent A vent is included into a scroll compressor for protecting a refrigerant system in the event of loss of charge. The vent selectively taps an entrapped compression chamber to a housing chamber which surrounds the motor. In the event of a low charge, the gas in the co... | 06/24/2008 |
| 7338264 | Recesses for pressure equalization in a scroll compressor A scroll compressor is provided with spaced grooves in a base of one of the two scroll members. A recess is formed in a wrap tip of the other scroll member. The recess in the wrap tip bridges a space between the grooves of the other scroll member. This bridging equa... | 03/04/2008 |
| 7329109 | Oil retention in scroll compressor pump members Oil retention recesses are formed on either or both orbiting and non-orbiting scroll elements. In one embodiment, the recesses are formed in a tip of a wrap of at least one of the scroll members. In another embodiment the recesses are formed on the base of at least ... | 02/12/2008 |
| 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 |
| 7284972 | Scroll compressor with stop structure to prevent slider block movement A scroll compressor has a stop on its eccentric pin to selectively engage a notch in a slider block, and prevent the slider block from moving upwardly and contacting a rear surface of the orbiting scroll. The present invention prevents this unwanted contact, and the... | 10/23/2007 |
| 7273363 | Scroll compressor with slider block having recess A slider block for a scroll compressor has a recess formed in a wall between a flat portion on the outer surface and a chamfer formed on the inner surface. The recess eliminates a high stress area of the prior art, and reduces cracks originating from this area of th... | 09/25/2007 |
| 7273362 | Scroll compressor with an eccentric pin having a higher contact point A scroll compressor assembly includes a shaft having an eccentric pin that orbits a first scroll member relative to a second scroll member. The eccentric pin has a length extending from a base end to a distal end, which defines a contact area having a slight crown t... | 09/25/2007 |
| 7261527 | Compressor check valve retainer A scroll compressor has a sealed housing. Within the sealed housing is a first scroll member having a first base and a first generally spiral wrap extending form the first base. A second scroll member has a second base and a second generally spiral wrap extending fr... | 08/28/2007 |
| 7255542 | Compressor with check valve orientated at angle relative to discharge tube A unique positioning of a discharge tube relative to a pivot axis of a check valve in a compressor reduces the wear and fatigue stresses on the pivoting check valve components. The tube is centered on an axis that is non-perpendicular to an axis that is parallel to ... | 08/14/2007 |
| 7247009 | Scroll compressor with slider block having upper surface over enlarged area A scroll compressor has a novel slider block with an upper surface that extends for a greater extent than the prior art. By extending this upper surface, the upper surface is better able to withstand wear on the slider block during the life of the scroll compressor.... | 07/24/2007 |
| 7228710 | Indentation to optimize vapor injection through ports extending through scroll wrap A scroll compressor is provided with economizer injection ports, which extend through the wrap of one of the scroll members. Preferably the injection ports are formed through a so-called “hybrid” wrap, which has a varying thickness. The other scroll member is pr... | 06/12/2007 |
| 7179067 | Scroll compressor with wrap walls provided with an abradable coating and a load-bearing surface at radially outer locations An abradable coating is formed on portions of the flank wall of the wraps of a scroll compressor. The radially outer portions of the flank wall are left uncoated, and can bear a force between the scroll wraps. In this manner, the load is not transferred through a co... | 02/20/2007 |
| 7100386 | Economizer/by-pass port inserts to control port size Compressor performance is affected by the size of an economizer or by-pass port area. To achieve variation in size, an insert is inserted into an economizer and/or unloader flow passage to provide a desired port area. The insert may be selected from a number of avai... | 09/05/2006 |
| 7083397 | Scroll compressor with motor control for capacity modulation Several transmission embodiments selectively communicate rotary drive to an orbiting scroll to achieve capacity modulation. In these embodiments, when the motor is driven in a first direction, the orbiting scroll is driven at a rate which is equal to the motor speed... | 08/01/2006 |
| 7079364 | Overload status indicator for a refrigeration unit A compressor assembly comprises a compressor, a motor protector, and a signaling device. Upon an overload condition, the motor protector activates. The signaling device also activates to serve as an alert that the compressor is not malfunctioning but instead is in a... | 07/18/2006 |
| 7063522 | Scroll compressor with complex fillets between eccentric pin and shaft shoulder A scroll compressor has an eccentric pin that extends forwardly of a rotating shaft. The eccentric pin generally has a curved outer portion and a flat outer portion. Each of the flat and curved outer portions have fillets that are formed to merge the eccentric pin p... | 06/20/2006 |
| 7043817 | Method of aligning scroll compressor pump cartridge A method of aligning a crankcase to a non-orbiting scroll includes the steps of forming initial alignment surfaces on both the non-orbiting scroll and the crankcase. Further, when the non-orbiting scroll and the crankcase are machined, precision drilled holes are dr... | 05/16/2006 |
| 6984114 | Two-step self-modulating scroll compressor A self-modulating scroll compressor includes a pair of valves. A first valve moves to a low capacity position when the pressure differential is below a predetermined amount. A second valve moves to a low capacity position when the suction pressure is above a predete... | 01/10/2006 |
| 6969243 | Scroll compressor with recess on crankcase or orbiting scroll A scroll compressor has a recess cut into a surface of a crankcase or an orbiting scroll while there is no material removed next to the seals that seal refrigerant in the back chamber located between the orbiting scroll and crankcase. Because there is no material re... | 11/29/2005 |
| 6966759 | Compressor diagnostic and recording system A compressor diagnostic system incorporates a control which receives a plurality of data streams about various operational features of the compressor. As an example, both temperature and pressure of the suction and discharge refrigerant are taken and sent to the con... | 11/22/2005 |
| 6964558 | Compressor utilizing low volt power tapped from high volt power Low voltage electrical power is supplied to a diagnostic control device in a sealed compressor. Electrical power is tapped from a high voltage power line and transformed to low voltage power that in turn operates the diagnostic control device. The diagnostic control... | 11/15/2005 |
| 6896499 | Scroll compressor with flow restriction and back pressure chamber tap Scroll compressors include a tap for communicating a compressed refrigerant to a back pressure chamber to resist a separating force. A restriction is placed within this tap to slow build-up of the back pressure chamber at start-up. Further, the restriction smoothes ... | 05/24/2005 |
| 6896498 | Scroll compressor with hot oil temperature responsive relief of back pressure chamber A scroll compressor includes a protection device that has a valve movable between a position blocking flow from the back pressure chamber into the suction chamber, and a position allowing such flow. The valve is movable dependent on an oil temperature. Under adverse... | 05/24/2005 |
| 6893234 | Non-circular centered seal for back pressure chamber A scroll compressor is provided with a non-circular back pressure chamber which is still concentric about a center axis of the compressor, such as the center axis of the drive shaft. Stated another way, an inner seal and an outer seal define a back pressure chamber.... | 05/17/2005 |
| 6887052 | Scroll wrap tip with abradable selectively applied coating and load-bearing surface A scroll compressor is provided with a generally spiral wrap having an abradable or conformable coating on radially inner portions of its tip. The coating is not applied to radially outer portions. During operation of the scroll compressor, the coating will eliminat... | 05/03/2005 |
| 6884042 | Two-step self-modulating scroll compressor A self-modulating scroll compressor includes a pair of valves. A first valve moves to a low capacity position when the pressure differential is below a predetermined amount. A second valve moves to a low capacity position when the suction pressure is above a predete... | 04/26/2005 |
| 6848889 | Oil utilized as motor protector trip for scroll compressor A scroll compressor has lubricant flow which communicates lubricant onto a motor protector when adverse conditions are present causing the motor protector to trip the motor and stop further rotation. The lubricant is returned to an oil sump through a normal return p... | 02/01/2005 |
