Abstract: A compressor has a movable scroll supported on a bushing connected to a rotary shaft via an eccentric pin. The movable scroll and the bushing are disposed coaxial to the eccentric pin to rotate together with the eccentric pin. The movable scroll moves along a predetermined circular path around an axis of the rotary shaft to closely contact a fixed scroll, opposed to the movable scroll at a given portion to define a displaceable fluid pocket and compresses refrigerant gas introduced into the fluid pocket. The compressor comprises a first balance weight eccentrically supported on the eccentric pin for an integral rotation therewith. The first balance weight is arranged to generate first centrifugal force counteracting second centrifugal force generated in the movable scroll and the bushing based on the rotation of the movable scroll and the bushing.

Abstract: A scroll type compressor includes a front housing, a fixed scroll, a movable scroll and a rear housing, and its lateral cross section has a substantially oval shape. The spiral element of the movable scroll is located in the space defined by the front housing and the fixed scroll in such a way as to engage with the spiral element of the fixed scroll. The space defined by the fixed scroll and the rear housing serves as a discharge chamber where compressed refrigerant gas is discharged. Since this compressor has the same compression displacement as that of a compressor having a circular cross section, this compressor can be placed in narrow space whose width is less than the width of the circular compressor, without any reduction in the cooling performance.

Abstract: A compressor has a fixed scroll (2) and a movable scroll (9). Both scrolls (2), (9) have end plates (11), (13) and spiral elements (12), (14) integrated with their end plates (11), (13). Both scrolls (2), (9) engage with each other at the spiral elements (12), (14). Pockets (16-19) are formed between both spiral elements (12), (14). The pockets (16-19) move toward the centers of the spiral elements (12), (14) while their volumes are reduced in accordance with the revolution of the movable scroll (9), thus compressing refrigerant gas. Grooves (52), (50) are formed in end faces of the spiral elements (12), (14) of both the fixed and movable scrolls (2), (9). Fitted in those grooves (52), (50) are seals (53), (51) for securing airtightness with the mating end plates (12), (14).

Abstract: A scroll-type compressor comprising mutually mating stationary and movable scrolls for forming a compression chamber. The shell of the compressor comprises a center housing, a front housing, and a rear housing. The stationary scroll is integrally formed with the center housing. The movable scroll is carried by an eccentric shaft portion of a drive shaft which is rotatably supported by the front housing so that the movable scroll can move in an orbit. The center housing has a first set of bolt holes, and the front housing has a first set of threaded holes, so that a first set of fastening bolts are inserted in the first set of bolt holes from the rear side and screwed into the first set of threaded holes. Also, the rear housing has a second set of bolt holes, and the center housing has a second set of threaded holes, so that a second set of fastening bolts are inserted in the second set of bolt holes from the rear side and screwed into the second set of threaded holes.

Abstract: A scroll type compressor has a fixed scroll in a housing and a movable scroll opposed to the fixed scroll to define a compression chamber with the fixed scroll. Gas introduced into a suction chamber via an inlet is compressed in the compression chamber and then is discharged to a discharge chamber via a discharge port to exhaust the compressed gas from an outlet to the outside of the compressor in accordance with the circular movement of the movable scroll. A part of the discharge chamber is defined in the fixed scroll. An outlet flange protrudes from the fixed scroll. The outlet flange includes the outlet which communicates with the discharge chamber.

Abstract: A large diameter portion of a rotating shaft is supported by an opening in a front housing via a radial bearing. An outer race of the bearing is in contact with an inner, rear surface of the housing as a shoulder portion of the opening. The inner surface is forwardly recessed, so that a small chamber is formed between the housing and the bearing unit. The housing has a stopper projection at a rear end of an opening to which a shaft seal unit is inserted. The projection is axially projected to a faced front surface of the large diameter portion of the shaft, while a seal chamber is formed between the shaft seal unit and the large diameter portion. The seal chamber is in communication with the small chamber. A plurality of circumferentially spaced grooves for holding lubricant are formed at the recessed surface for forming the small chamber.

Abstract: A scroll compressor having a driving shaft 6, on which a bushing 10 and a balancing weight 9 are supported. The drive shaft 6 includes, at its end, a drive projection 6a, which is engaged with a driven groove 10a formed in the bushing 10. A spring 20 is arranged between the drive projection 6a and the bushing 10 for urging the latter radially inwardly to reduce the radius of the orbital movement of the bushing 10. A centrifugal force generated in the bushing when the drive shaft 6 is rotated causes the bushing 10 to be moved radially outwardly to increasing the radius of the orbital movement of the bushing 10.

Abstract: A scroll type compressor comprises a fixed scroll having an end plate and a spiral element. The spiral element of the fixed scroll is integrally coupled to the inner wall of a housing. A movable scroll has an end plate and a spiral element, and faces the fixed scroll, with a plurality of fluid pockets formed between the movable scroll and the fixed scroll. When the movable scroll makes an orbital movement around the axis of the rotary shaft, refrigerant gas is led into the fluid pockets from outside the movable scroll. As the fluid pockets move toward the center of the movable scroll the fluid pockets decrease in volume, thereby compressing the refrigerant gas. A suction chamber which receives the refrigerant gas from outside the housing is formed between the movable scroll and the inner wall of the housing. A passage is formed in at least one of the inner wall of the housing, the connecting section and the end plate of the movable scroll.

Abstract: A scroll type compressor has a movable scroll which is supported by a drive shaft by way of an eccentric pin in a housing. The movable scroll engages in an orbital movement for defining a compression chamber with a fixed scroll which is disposed opposite to the movable scroll. The compression chamber decreases in size in accordance with the orbital movement of said movable scroll for compressing gas in the compression chamber. A first ring orbits together with the movable scroll between the movable scroll and the housing, for receiving compressive reaction force acting on the movable scroll. A second ring which is secured to the housing receives the compressive reaction force received by and acting on the ring.

Abstract: Disclosed is a compressor which has a fixed scroll and a movable scroll. Defined between both scrolls is a compression chamber in order to provide compressed gas. A pressure receiving member receives compression reaction force of the compressed gas. A base plate is provided on the movable scroll. A turnable ring is disposed between the pressure receiving member and the base plate. The ring has the first and second surfaces respectively facing the pressure receiving member and the base plate. The first surface of the ring has a plurality of first elements circumferentially spaces and provided at predetermined intervals. A plurality of first recesses are provided in the pressure receiving member, with the first elements fitted into the first recesses respectively. The second surface of the ring has a plurality of second elements circumferentially spaced and provided at predetermined intervals.

Abstract: A mechanism for allowing the orbital movement of an orbiting scroll with respect to a fixed scroll in a scroll type compressor which prevents the orbiting scroll from rotating around its own axis is disclosed. The orbiting scroll is eccentrically attached to a rotary shaft supported by a housing that encases the fixed and orbiting scrolls. A compression chamber is defined by the interfitting between the orbiting scroll and the fixed scroll. During the course of the orbiting scroll's rotation around the center axis line of a rotary shaft, the volume of a compression chamber decreases as the rotation progresses. Refrigerant gas in the compression chamber is compressed in this manner as the constant volume of gas within the compression chamber decreases in size according to the progression of the rotating spiral member. A balancing weight disposed on the eccentric shaft compensates for dynamic unbalancing generated as the orbiting scroll makes an orbital movement due to the rotation of the rotary shaft.

Abstract: When a rotary shaft of a scroll type compressor rotates and a movable scroll of the compressor makes an orbital movement around the axis of a rotary shaft by way of an eccentric shaft, refrigerant gas is supplied to compression chambers between a fixed scroll and the movable scroll. A first bearing rotatably supports the rotary shaft. A second bearing is provided between the movable scroll and the eccentric shaft to permit relative movement therebetween. A balance weight attached to the movable scroll dynamically balances the movable scroll during its rotation. A crank chamber accommodates the balance weight. A suction port is so provided in the housing as to communicate with the crank chamber, and permits the refrigerant gas to be supplied into the housing. A passage is formed in the balance weight, the eccentric shaft and the rotary shaft to supply the refrigerant gas into a first gap between the first bearing and the rotary shaft and a second gap between the second bearing and the movable scroll.

Abstract: A scroll type refrigerant compressor having a stationary scroll unit, a movable scroll unit including an orbiting spiral member engaged with the stationary scroll unit to define variable-volume compression chambers in which the refrigerant gas is compressed in response to a rotation of a drive shaft having an eccentrically arranged drive key member, and a drive bushing member having an aperture formed therein in which the drive key of the drive shaft is inserted so as to cause an eccentric motion of the drive bushing member operatively engaged with the movable spiral member to thereby drive an orbiting motion of the movable spiral member.

Abstract: A scroll type compressor which prevents occurrence of abnormally high pressures due to liquid compression at the time of startup so as to lighten the engine load by providing a projection on the end face of the shaft and a groove in which the projection fits in the end face of the bush supporting a movable scroll member, the projection and groove being arranged so that their abutting faces are inclined a predetermined angle with respect to a line connecting the center of the shaft and the center of the bush in the direction opposite to the rotational direction of the shaft and being positioned relative to each other so that the extension line of the abutting faces passes through the side opposite to the side where the center of the bush is positioned seen from the center of the shaft.

Abstract: An improved scroll type compressor having a discharge port that is offset from the maximum compression pocket a predetermined distance and radial direction so as to minimize the cantilevered exposure over the discharge port of the terminal tip of a fluid seal that is disposed within a groove in the end surface of the orbiting spiral element facing the fixed end plate.

Abstract: A scroll type refrigerant compressor having an aluminum or aluminum alloy housing unit in which a stationary scroll unit having a stationary spiral member and a movable scroll unit having a movable spiral member are encased in such a manner that the movable spiral member moves along a predetermined orbiting path without rotating about an axis thereof, and a reinforcing ferric metal liner fixedly attached to an inner cylindrical face of a cylindrical wall portion of the aluminum or aluminum alloy housing unit so as to prevent the inner cylindrical face of the housing unit from being mechanically cracked by the movable spiral member of the movable scroll unit during the running of the compressor even if the movable scroll unit jams due to entrance of foreign materials between the outer face of the movable spiral member and the inner face of the housing unit.

Abstract: A scroll type compressor comprises an immovable scroll defining a spiral space, and a refrigerant is introduced into an outerhost zone of the spiral space. The compressor further comprises a movable scroll engaged with the immovable scroll such that the outermost zone of the spiral space is divided into an inner section and an outer section by an outermost portion of the movable scroll. The movable scroll is revolved around a center axis of the immovable scroll such that the inner and outer sections are alternatively displaced as a compression chamber toward a center of the immovable scroll, and a refrigerant inlet port of the inner section is defined by a termination of the outermost portion of the movable scroll. The termination is disengaged from and engaged with the immovable scroll during the revolution of the movable scroll to close and open the inlet port of the inner section.

Abstract: The scroll type compressor includes a stationary and orbiting scroll members, of which the spiral elements are interfit at an offset angle to form line contacts defining at least one fluid pocket, and an anti-spin mechanism for causing the orbiting member to orbit within the stationary member. A drive shaft is rotatably supported in a housing, and has an outer end a cylindrical inner end and, depending upon the embodiment, either a crank pin or a sliding guide portion projecting axially inward from its inner end. A drive bush couples the drive shaft to the orbiting scroll member, and has either a circular aperture for receiving the crank pin or an engaging slotted recess for receiving the sliding guide portion, as the case may be, whereby the drive bush is either pivotable or slidable with respect to the drive shaft. A counterweight is mounted on either the crank pin or the sliding guide portion between the drive bush and the drive shaft, and is coupled to the drive bush for conjoint movement therewith.

Abstract: A scroll type compressor includes a fixed scroll having a fixed spiral element and a fixed end plate, and an orbiting scroll is revolvable without rotating itself in opposition to the fixed scroll. The orbiting scroll includes an orbiting spiral element and an orbiting end plate. A plurality of compression chambers, of which volumes are decreased in response to the revolution of the orbiting scroll, are defined between the scrolls. A discharge port opens to the discharge chambers. The thicknesses of initiating sections of the fixed and orbiting spiral elements are designed larger than those of remaining sections thereof. Sealing members having a spiral shape are slidably interposed between the fixed and orbiting end plates of the fixed and orbiting scrolls, and the initiating sections of the fixed and orbiting spiral elements are in opposition to the respective end plates.

Abstract: A scroll type compressor comprising mutually mating stationary and movable scroll members, a drive shaft, a counterweight, a slide key extending from the drive shaft, and a drive bush slidably fit on the slide key. The counterweight is immovably fit on the drive shaft. The slide key has a first axis offset from the longitudinal axis of the drive shaft for causing the movable scroll member to revolve around the longitudinal axis of the drive shaft, and a second axis perpendicular to the first axis. In the second form of the compressor, the counterweight has a guide portion having a first axis offset from the longitudinal axis of the drive shaft for causing the movable scroll member to revolve around the longitudinal axis of the drive shaft, and a second axis. The drive bush is slidably fit on the guide portion.