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Class 418/55.1 - Helical working member, e.g., scroll


Subclass of Class 418 - Rotary expansible chamber devices
Definition: Apparatus in which the working member includes continuous
No. of patents: 609
Last issue date: 05/08/2012


1                      
NumberTitleIssue Date
8172559Horizontal type electric compressor
An electric compressor (201) includes: a compressor (203) configured to compress a refrigerant, the compressor (203) having a plurality of passage ports (207) delivering the refrigerant; an electric motor (205) configured to drive ...
05/08/2012
8152500Scroll compressor build assembly
A scroll compressor build assembly is provided. An outer housing includes multiple shell sections that interfit to provide internal steps that provide seating surfaces. One or both bearing members can use the internal seats. The outer housing may comprise three shel...
04/10/2012
8147229Motor-compressor unit mounting arrangement for compressors
A method of assembling a compressor, including assembling, first as a subassembly external of the compressor housing, portions of the motor-compressor unit, including a crankcase, mount brackets, stator, outboard bearing assembly, and drive shaft. Thereafter, the mo...
04/03/2012
8147230Scroll compressor having rearwardly directed fluid inlet and outlet
A scroll compressor includes a chamber formed in a casing and a compartment formed in a rearward end, a fixed scroll mounted within the casing and having a spiral scroll element extended from a base plate, and an orbiting scroll rotatably disposed in the casing, and...
04/03/2012
8142175Mounting base and scroll compressor incorporating same
A scroll compressor assembly includes a mounting base with a pair of support ribs formed into the mounting base, for structurally strengthening the support provided by the mounting base. The mounting base may either support the scroll compressor housing as a separat...
03/27/2012
8128387Discharge chamber for dual drive scroll compressor
A dual drive compressor is disclosed including a discharge chamber having a wall disposed therein forming a plurality of discharge zones within the discharge chamber to attenuate pulsations caused by a fluid received in the compressor and improve a performance of th...
03/06/2012
8087912Crankshaft having first and second eccentric portions
A crankshaft is to be provided that allows its assembly process to be simplified, work hours required for the assembly process to be shortened and a manufacturing cost to be reduced. The crankshaft is provided with first eccentric section and second eccentric sectio...
01/03/2012
8075289Scroll-type fluid machine including thrust receiving device
A scroll-type fluid machine has a fixed scroll (40) fixed in a housing (10), a movable scroll (52) that forms pressure chambers (52) in between the movable scroll (50) and the fixed scroll (40) and is orbitable relative to t...
12/13/2011
8052406Scroll machine having improved discharge valve assembly
A valve retainer is provided for securably retaining a discharge valve assembly within a recess formed in a scroll. The valve retainer can be installed between the recess of the non-orbital scroll and the discharge valve assembly to retain the discharge valve assemb...
11/08/2011
7993117Scroll compressor and baffle for same
A scroll compressor includes a baffle member in a high pressure region of the housing where compressed fluid is stored. The baffle serves to carry and transfer pressure loads away from the central region to an outer periphery region where such loads can be transferr...
08/09/2011
7967581Shaft mounted counterweight, method and scroll compressor incorporating same
A counterweight mounted to a drive shaft in a scroll compressor is provided. The drive shaft has a central annular segment generally concentric about the central axis and an eccentric annular segment offset from the central axis that can be used for driving the mova...
06/28/2011
7963752Powder metal scroll hub joint
A scroll component including a spiral scroll wrap, a baseplate having a first major surface coupled to the scroll wrap and a second opposing major surface comprising a protruding pilot extending a distance from the baseplate, and a hub fastened to the baseplate adja...
06/21/2011
7959421Compressor having a shutdown valve
A compressor includes a shell, a compression mechanism supported within a suction pressure region of the shell and including a discharge outlet in communication with the discharge chamber, and a discharge valve assembly. The discharge valve assembly includes a valve...
06/14/2011
RE42371Scroll machine
A compressor includes a normally open discharge valve assembly for controlling compressed refrigerant flow from the discharge chamber through the compression members. This controlling of flow results in an increased performance for the compressor by reducing recompr...
05/17/2011
7942655Advanced scroll compressor, vacuum pump, and expander
Modifications of a scroll compressor provide a bellows suitable for liquid cooling and a plunger actuated seal for the scroll tips of various equipment. A bellows spans the fixed and the orbiting scrolls and hermetically seals the scroll device. Using two bellows, t...
05/17/2011
7934915Valve assembly for scroll compressor
A scroll compressor has a reed valve mounted on a central discharge port. The reed valve has a valve portion at a first end and a pin holding the reed valve onto a non-orbiting scroll member at a second end. The reed valve extends along a plane which is non-perpendi...
05/03/2011
7934914Scroll machine having counterweights with changeable cavity
A balancing system for different compressors utilizes a counterweight having a common exterior configuration. The mass of the counterweight is optimized for each compressor by changing the size of a recess located in the counterweight. In one embodiment, the recess ...
05/03/2011
7914268Compressor having shell with alignment features
A compressor includes a shell formed from a piece of material having first, second, third, and fourth ends. The third and fourth ends extend between the first and second ends and are coupled to one another. The first and second ends form longitudinal ends of the she...
03/29/2011
7909592Scroll compressor
A scroll compressor is provided which has favorable assembling property, does not require a thrust bearing, has a bearing structure for bearing a compression section at both sides thereof and has a simple structure of a scroll. The scroll compressor includes a compr...
03/22/2011
7901194Shaft coupling for scroll compressor
A coupling mechanism for a scroll compressor comprises an orbiting scroll disk, a retention bolt, a bearing shaft and a retention nut. The orbiting scroll disk includes a first face configured to engage a stationary scroll disk to compress a working fluid, and a sec...
03/08/2011
7896629Scroll compressor with discharge valve
A scroll compressor includes an orbiting scroll member having an orbiting end plate defining a discharge port and an orbiting spiral wrap extending from the orbiting end plate. The compressor also includes a non-orbiting scroll member having a non-orbiting end plate...
03/01/2011
7891961Mounting structure of discharge valve in scroll compressor
A bolt hole receiving a fixing bolt is formed in a portion of an end plate overlapping an annular piston or a fixed wrap as viewed in a thickness direction of the end plate to open at the back face of the end plate. In fixing a discharge valve to the end plate, the ...
02/22/2011
7878775Scroll compressor with housing shell location
A scroll compressor includes a feature for location of a housing shell section off of one of the scroll compressor bodies. According to this aspect, a scroll compressor comprises a housing including a shell section; scroll compressor bodies having respective bases a...
02/01/2011
7866964Sensor for hermetic machine
A hermetic scroll compressor includes a hermetic shell through which the pressure within the shell is monitored. In one embodiment, a housing is resistance welded into an aperture extending through the shell. An oil filled pressure sensor or a dry type pressure sens...
01/11/2011
7862312Suction baffle for scroll compressors
A scroll compressor including a hermetic housing with a motor-compressor unit disposed therein, including fixed and orbiting scrolls. The fixed scroll defines perpendicular axial and radial directions, and includes an outer wall having a suction inlet facing substan...
01/04/2011
7845918Powder metal scrolls
Scrolls made from one or more near-net shaped powder metal processes either wholly or fabricated together from sections. Both “conventional” press and sinter methods and metal injection molding methods will be described. ...
12/07/2010
7841845Open drive scroll machine
A compressor assembly includes a planetary gear train located between an input shaft from the power unit and a drive shaft of the compressor. The planetary gear train is switchable between a high speed and a low speed condition. In the high speed condition, power is...
11/30/2010
7819644Scroll compressor with crankshaft venting
Lubrication of bearing surfaces in a scroll compressor is enhanced by a vent arrangement which makes use of increased centrifugal force, achieved by locating the outlet of the vent arrangement radially outside of the nominal circumference of the compressor's drive s...
10/26/2010
7815423Compressor with fluid injection system
A scroll compressor includes a housing, a non-orbiting scroll member including a first spiral wrap, and an orbiting scroll member including a second spiral wrap. The first and second spiral wraps are interleaved to define at least one moving fluid pocket that decrea...
10/19/2010
7614859Scroll compressor with certain pressure ratio between discharge pressure and suction pressure and with certain ratio of diameter of orbiting mirror plate and outer diameter of the annular seal
A back pressure chamber (12) provided on a back surface of an orbiting scroll (5) is divided into an inner region (12a) and an outer region (12b) by an annular seal (11). A diameter d of the annular seal (11) i...
11/10/2009
7614860Scroll compressor
A scroll compressor is provided which has favorable assembling property, does not require a thrust bearing, has a bearing structure for bearing a compression section at both sides thereof and has a simple structure of a scroll. The scroll compressor includes a compr...
11/10/2009
7604465Fluid machine and scroll compressor having a crankshaft with a large diameter shaft section
There is provided a fluid machine able to secure a sectional area of a passage sufficient for gaseous fluid flow from a suction port to a compression mechanism, while able at the same time to achieve a reduction in size of the outline shape. In a scroll compressor w...
10/20/2009
7527484Muffler of scroll compressor
Disclosed herein is a muffler of a scroll compressor. The muffler includes a first muffler having a pair of chambers defined above an outlet of a fixed scroll to communicate with the outlet and a gas passage hole formed at the center of an upper end thereof, and a s...
05/05/2009
7497673Scroll fluid machine having forced convection generating portion
In a scroll fluid machine, a driving shaft has an eccentric axial portion around which an orbiting scroll revolves while the orbiting scroll engages with a fixed scroll. A cooling path extends through the driving shaft to a gap between the outer circumferential surf...
03/03/2009
7442016Scroll pump and method of assembling same
A method of assembling a scroll pump comprises the following steps carried out sequentially; the step of mounting a first bearing means (20) and drive shaft (14) for rotation relative to a housing (12): the step of fastening a first flange porti...
10/28/2008
7442018Compressor having an oil residue pool
A compressor comprises, in a container body, an electric element, and a compressive element driven by the electric element. An oil storage is provided in the bottom, and an oil pump is provided to suck up oil from the oil storage. The oil pump includes a cylinder fi...
10/28/2008
7442017Displacement type compressor having a self-start synchronous motor and start load reducing means
In order to make a displacement type compressor be able to reliably start without increasing an outside diameter dimension of the compressor while using a self-start synchronous motor having high energy efficiency, the displacement type compressor according to the i...
10/28/2008
7435067Scroll machine with brushless permanent magnet motor
A scroll machine is powered by a brushless permanent magnet motor. The rotor for the motor includes a rotor body formed by a plurality of laminations and an upper and lower counterweight made of zinc and located at opposite ends of the rotor body. An attachment memb...
10/14/2008
7429167Scroll machine having a discharge valve assembly
A discharge valve assembly is provided for preventing reverse rotation of a scroll compressor. The discharge valve assembly includes a cup-shaped valve member slidably engaged with a central post of a retainer member. The cup-shaped valve member includes notches in ...
09/30/2008
7413422Compressor including pressure relief mechanism
A scroll compressor is provided with a housing having a discharge chamber to which a high-pressure refrigerant is discharged from a scroll unit, a discharge path connecting the discharge chamber and an outlet port 78 of the housing, a separating device arrang...
08/19/2008
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