Abstract: The invention aims to provide a scroll fluid machine which has auxiliary cranks divided into two separate crank members connected by pressure fitting in the process of assembling of the scroll machine. Each of the auxiliary cranks for regulating the motion of the revolving scroll is divided into a revolving scroll side crank member and a stationary scroll side crank member, the crank members are configured such that one of the crank members can be pressed into the other crank member, and both of the crank members are connected to compose a one-piece auxiliary crank when both of the scrolls are assembled.

Abstract: A scroll fluid machine includes an orbiting scroll which has an orbiting end plate. The orbiting end plate has a plurality of extensions on the outer circumference. Each of the extensions has a boss in which a self-rotation-preventing eccentric shaft is pivotally supported. The extension has an easily-deformable portion to keep exact positional relationship between the extensions or to the center of the orbiting end plate of the extension.

Abstract: A scroll fluid machine comprises fixed and orbiting scrolls. The fixed scroll has a fixed end plate having inner and outer fixed wraps and the orbiting scroll has an orbiting end plate having inner and outer wraps. Between the fixed and orbiting end plates, an annular partition wall is provided. The orbiting scroll is driven by an eccentric portion of a driving shat to form an inner compressing chamber in which the inner fixed wrap is engaged with the inner orbiting inside the annular partition wall and to form an outer compressing chamber in which the outer fixed wrap is engaged with the outer orbiting wrap between the annular partition wall and a housing. The inner compressing chamber communicates with a rear pressure chamber behind the orbiting end plate thereby preventing the orbiting end plate from being deformed or distorted.

Abstract: A scroll fluid machine comprises a stationary scroll and an orbiting scroll fitted on an eccentric portion of a driving shaft. The stationary scroll has a stationary end plate from which inner and outer stationary wraps project, and the orbiting scroll has an orbiting end plate from which inner and outer orbiting wraps project. Between the stationary and orbiting end plates, inner and outer annular partition walls are provided. Inside the inner partition wall, the inner stationary wrap is engaged with the inner orbiting wrap to form an expanding region, and between the inner and outer partition walls, the outer stationary wrap is engaged with the outer orbiting wrap to form a compressing region. A bore is formed through the orbiting end plate so that fluid expanded and cooled in the expanding region flows from the expanding region to rear surface of the orbiting end plate to cool the orbiting end plate.

Abstract: A piston is reciprocated axially at high speed at very small amplitude by an actuator in the larger-diameter base of an acoustic resonator. According to pressure fluctuation in the acoustic resonator involved by reciprocal motion of the piston, fluid is sucked into and discharged from the acoustic resonator via a valve device at the top end of the acoustic resonator. The acoustic resonator is contained in a gas guide. Fluid from the valve device is introduced into the gas guide to cool the valve device.

Abstract: In an acoustic resonator, an actuator allows a piston to reciprocate axially at very small amplitude at high speed. Owing to pressure fluctuation in the acoustic resonator involved by reciprocal motion of the piston, fluid is sucked into and discharged from the acoustic resonator via a valve device at the top end of the acoustic resonator. The acoustic resonator is covered with a gas guide with a space. The valve device is cooled by a fan at the top end of the gas guide.

Abstract: A scroll fluid machine comprises a stationary scroll and an orbiting scroll fitted on an eccentric portion of a driving shaft. The stationary scroll has a stationary end plate from which inner and outer stationary wraps project, and the orbiting scroll has an orbiting end plate from which inner and outer orbiting wraps project. Between the stationary and orbiting end plates, inner and outer annular partition walls are provided. Inside the inner partition wall, the inner stationary wrap is engaged with the inner orbiting wrap to form an expanding region, and between the inner and outer partition walls, the outer stationary wrap is engaged with the outer orbiting wrap to form a compressing region. A bore is formed through the orbiting end plate so that fluid expanded and cooled in the expanding region flows from the expanding region to rear surface of the orbiting end plate to cool the orbiting end plate.

Abstract: A scroll-type fluid machine such as a scroll compressor or a scroll vacuum pump generates compression heat during compressing operation. A scroll body comprises a stationary scroll and an orbiting scroll that is revolved with respect to the stationary scroll eccentrically. The stationary scroll has a stationary wrap and the orbiting scroll has an orbiting wrap engaged with the stationary wrap to form a compression chamber therebetween. In the scroll-type fluid machine, a cooler is provided to cool high-temperature compressed air discharged from a discharge bore at the center of the stationary scroll.

Abstract: An acoustic fluid machine such as an air compressor comprises an acoustic resonator, a valve device and a piston. Air is sucked into the resonator through the valve device at one end of the resonator. The piston at the other end of the resonator is reciprocated by an actuator to compress the air in the resonator to cause resonance to increase pressure of the air significantly. The inner surface of the resonator is suitably curved to comply with the formula of a half-period cosine function.

Abstract: A scroll fluid machine comprises fixed and orbiting scrolls. The fixed scroll has a fixed end plate having inner and outer fixed wraps and the orbiting scroll has an orbiting end plate having inner and outer wraps. Between the fixed and orbiting end plates, an annular partition wall is provided. The orbiting scroll is driven by an eccentric portion of a driving shat to form an inner compressing chamber in which the inner fixed wrap is engaged with the inner orbiting inside the annular partition wall and to form an outer compressing chamber in which the outer fixed wrap is engaged with the outer orbiting wrap between the annular partition wall and a housing. The inner compressing chamber communicates with a rear pressure chamber behind the orbiting end plate thereby preventing the orbiting end plate from being deformed or distorted.

Abstract: An acoustic compressor has an acoustic resonator and a piston reciprocated by an actuator at a base of the acoustic resonator. A valve device is provided on the upper end of the acoustic resonator. The valve device comprises a suction chamber and a discharger chamber. External air is fed through an inlet to the suction chamber and sucked into the acoustic resonator through the suction bore. Then, the air in the resonator is compressed by the reciprocating piston. The discharge chamber has a discharge bore and an outlet to the outside. An outward nonreturn valve is larger in valve-opening resistance than an inward nonreturn valve in the suction bore. When the air pressure in the resonator exceeds a certain value, the high-pressure air is transferred to the discharge chamber through the discharge bore by allowing the outward nonreturn valve to open and then discharged through the outlet to the outside.

Abstract: An acoustic fluid machine has an acoustic resonator and a piston reciprocated by an actuator at the base of the acoustic resonator. A valve device is provided on the upper end of the acoustic resonator. External air is introduced into the acoustic resonator through the valve device. The piston has through-holes, through which front space communicates with rear space thereby reducing load applied onto the piston.

Abstract: An acoustic fluid machine includes an acoustic resonator, a valve device, a piston, and an actuator. The acoustic resonator has a larger-diameter base and a smaller-diameter upper end. The valve device is provided on the upper end of the acoustic resonator and has a sucking hole and a discharge hole. The piston is provided in the base of the acoustic resonator and has a surface such that the distance between the upper end of the acoustic resonator and the upper surface of the piston is substantially constant over the whole surface of the piston. The actuator is connected to the piston and reciprocates the piston at high speed axially with a very small amplitude so that a gas is sucked into the acoustic resonator via the sucking hole and discharged via the discharge hole by virtue of pressure fluctuations within the acoustic resonator.

Abstract: A scroll fluid machine comprises an orbiting scroll and a stationary scroll. The orbiting scroll comprises an orbiting end plate having an orbiting wrap, and the stationary scroll comprises a stationary end plate having a stationary wrap. The orbiting scroll is supported to turn on an eccentric shaft portion of a drive shaft. The orbiting wrap engages with the stationary wrap to form a sealed chamber therebetween. A bearing tube is detachably disposed in a housing. The drive shaft is supported to turn in the bearing tube.

Abstract: A scroll-type fluid machine such as a scroll compressor or a scroll vacuum pump generates compression heat during compressing operation. A scroll body comprises a stationary scroll and an orbiting scroll that is revolved with respect to the stationary scroll eccentrically. The stationary scroll has a stationary wrap and the orbiting scroll has an orbiting wrap engaged with the stationary wrap to form a compression chamber therebetween. In the scroll-type fluid machine, a cooler is provided to cool high-temperature compressed air discharged from a discharge bore at the center of the stationary scroll.

Abstract: A scroll-type fluid machine such as a scroll compressor or a scroll vacuum pump generates compression heat during compressing operation. A scroll body comprises a stationary scroll and an orbiting scroll that is revolved with respect to the stationary scroll eccentrically. The stationary scroll has a stationary wrap and the orbiting scroll has an orbiting wrap engaged with the stationary wrap to form a compression chamber therebetween. In the scroll-type fluid machine, a cooler is provided to cool high-temperature compressed air discharged from a discharge bore at the center of the stationary scroll.

Abstract: A scroll-type fluid machine such as a scroll compressor or a scroll vacuum pump generates compression heat during compressing operation. A scroll body comprises a stationary scroll and an orbiting scroll that is revolved with respect to the stationary scroll eccentrically. The stationary scroll has a stationary wrap and the orbiting scroll has an orbiting wrap engaged with the stationary wrap to form a compression chamber therebetween. In the scroll-type fluid machine, a cooler is provided to cool high-temperature compressed air discharged from a discharge bore at the center of the stationary scroll.

Abstract: A scroll fluid machine comprises an orbiting scroll and front and rear stationary scrolls. The orbiting scroll is driven by a driving shaft via an eccentric portion and has front and rear orbiting scroll wraps. The front and rear stationary scroll have front and rear orbiting scroll wraps respectively. The orbiting scroll is revolved by the driving shaft with respect to the stationary scrolls while the front and rear orbiting scroll wraps are engaged with the front and rear stationary scroll wraps to create front compressing and rear expanding sections. Fluid expanded and cooled in the expanding section is used for cooling parts of the machine.

Abstract: A scroll-type fluid machine includes a fixed scroll having spiral-form fixed wraps standing on one side face and an orbiting scroll having spiral-form orbiting wraps standing on one side face facing the fixed scroll. The orbiting scroll is set up on a drive shaft so as to be able to orbit. A sealed chamber is formed between the fixed wraps and the orbiting wraps. In the sealed chamber an outer sealed chamber and an inner sealed chamber are defined by an annular partition provided on either the fixed scroll or the orbiting scroll. The outer sealed chamber includes outer inlets on the outside and an outer outlet on the inside, and the inner sealed chamber includes an inner inlet on the outside and an inner outlet in the center. A gas that has been taken in via the outer inlets is compressed and discharged via the outer outlet, and a gas that has been taken in via the inner inlet is compressed and discharged via the inner outlet.

Abstract: A scroll-type fluid machine such as a scroll compressor or a scroll vacuum pump generates compression heat during compressing operation. A scroll body comprises a stationary scroll and an orbiting scroll that is revolved with respect to the stationary scroll eccentrically. The stationary scroll has a stationary wrap and the orbiting scroll has an orbiting wrap engaged with the stationary wrap to form a compression chamber therebetween. In the scroll-type fluid machine, a cooler is provided to cool high-temperature compressed air discharged from a discharge bore at the center of the stationary scroll.