A fluid pumping device is disclosed. The fluid pumping device includes a housing having a front end and a rear end, a fluid discharge opening in the front end of the housing, a pump assembly, a crank assembly rotatably connected to the pump assembly wherein the crank assembly operates the pump assembly, and a fluid storage reservoir connected to the gear housing from which fluid is drawn into the gear housing to be pumped through the fluid discharge opening.

In a method for manufacturing an anti-rotation ring of a scroll type compressor, wherein the anti-rotation ring is provided in an anti-rotation mechanism for preventing a movable scroll from rotation on its own axis and made of a metal, the steps of the method include drawing a steel plate into a first intermediate body having a bottomed cylindrical shape, punching the bottom of the first intermediate body thereby to make a second intermediate body and ring forming the second intermediate body.

A scroll compressor includes a stationary scroll; an orbiting scroll having a pair of first Oldham keyways on one surface thereof, the orbiting scroll defining a compression chamber in combination with the stationary scroll; a frame having a pair of second Oldham keyways and supporting the orbiting scroll; and an Oldham ring for inhibiting rotation of the orbiting scroll, the Oldham ring having a pair of first Oldham keys on one surface thereof and a pair of second Oldham keys on the other surface thereof, the first Oldham keys slidably engaging with the respective first Oldham keyways, the second Oldham keys slidably engaging with the respective second Oldham keyways. The Oldham ring includes at least a pair of projections on the other surface thereof, and the projections have a height such that when the Oldham ring is inclined during simple harmonic motion, one of the projections makes contact with the one surface of the orbiting scroll before each of the first Oldham keys is brought into contact with the corresponding first Oldham keyway at two locations.

A scroll-type fluid machine including: a scroll unit (4) having a fixed scroll (2) and a movable scroll (3) in which a bottom plate center (3c) and a wrap spiral center (3d) are made eccentric; and a rotation-inhibiting mechanism (30) with multiple rotating-inhibiting parts (33), each part (33) being composed of a circular hole (31) and a pin (32), wherein the rotation-inhibiting mechanism (30), a straight line A connecting the bottom plate center (3c) and the wrap spiral center (3d) is rotated on the bottom plate center by 90° in a direction opposite to a wrapping direction of the wrap (3b), a point at which the rotated straight line A intersects a pitch circle is set as a center position of one of the rotation-inhibiting parts (33), the other rotation-inhibiting parts (33) are arranged on the pitch circle at even intervals based on one of the rotation-inhibiting part (33).

A scroll-type fluid machine including: a scroll unit (4) having a fixed scroll (2) and a movable scroll (3) in which a bottom plate center (3c) and a wrap spiral center (3d) are made eccentric; and a rotation-inhibiting mechanism (30) with multiple rotating-inhibiting parts (33), each part (33) being composed of a circular hole (31) and a pin (32), wherein the rotation-inhibiting mechanism (30), a straight line A connecting the bottom plate center (3c) and the wrap spiral center (3d) is rotated on the bottom plate center by 90° in a direction opposite to a wrapping direction of the wrap (3b), a point at which the rotated straight line A intersects a pitch circle is set as a center position of one of the rotation-inhibiting parts (33), the other rotation-inhibiting parts (33) are arranged on the pitch circle at even intervals based on one of the rotation-inhibiting part (33).

A compressor crankshaft assembly includes a crankshaft and an eccentric drive pin extending from one end of the crankshaft. The shape of the drive pin viewed into the exposed end of the drive pin is defined by the intersection of a first cylinder that is coaxial with the axis of a substantially cylindrical orbital bearing journaled and installed to receive the eccentric drive pin and a second cylinder that is coaxial with the axis of a substantially cylindrical main bearing journaled and installed to rotatably receive the crankshaft, such that the area defined by the intersecting portion is less than the area defined by either cylinder.

A scroll type fluid machine (1) including a rotation stopping mechanism (36) for stopping rotation of a movable scroll without hindering revolving motion of the movable scroll (16) relative to a fixed scroll (14) fixed to a casing (4), the rotation stopping mechanism includes: a support hole (42) drilled in either one of a base plate (16a) of the movable scroll and a pedestal part (4a) of the casing; a rotation stopping pin (38) that is fitted into the support hole, and is protruded to the side of the other of the base plate and the pedestal part; a restriction hole (46) drilled in the other of the base plate and the pedestal part, and loosely fitted with the rotation stopping pin; and a buffer member (44) interposed between the support hole and the rotation stopping pin.

A scroll type fluid machine (1) including a rotation stopping mechanism (36) for stopping rotation of a movable scroll without hindering revolving motion of the movable scroll (16) relative to a fixed scroll (14) fixed to a casing (4), the rotation stopping mechanism includes: a support hole (42) drilled in either one of a base plate (16a) of the movable scroll and a pedestal part (4a) of the casing; a rotation stopping pin (38) that is fitted into the support hole, and is protruded to the side of the other of the base plate and the pedestal part; a restriction hole (46) drilled in the other of the base plate and the pedestal part, and loosely fitted with the rotation stopping pin; and a buffer member (44) interposed between the support hole and the rotation stopping pin.

A spiral compressor may include a stationary first spiral member and an orbiting second spiral member intermeshing with the first spiral member. The spiral compressor may include a pendulum slide mechanism that may have an inner ring and a stationary outer ring connected to the inner ring via a plurality of pendulums. The pendulum slide mechanism may include an eccentric member disposed on a radial inside of the inner ring with respect to a central access of the inner ring. The inner ring on an inner circumferential side may be drivingly connected to the eccentric member and on an outer circumferential side may be rigidly connected to the second spiral member. The second spiral member may transmit an orbiting motion in relation to the first spiral member via the pendulum slide mechanism when the eccentric member is driven.

A spiral compressor may include a stationary first spiral member and an orbiting second spiral member intermeshing with the first spiral member. The spiral compressor may include a pendulum slide mechanism that may have an inner ring and a stationary outer ring connected to the inner ring via a plurality of pendulums. The pendulum slide mechanism may include an eccentric member disposed on a radial inside of the inner ring with respect to a central access of the inner ring. The inner ring on an inner circumferential side may be drivingly connected to the eccentric member and on an outer circumferential side may be rigidly connected to the second spiral member. The second spiral member may transmit an orbiting motion in relation to the first spiral member via the pendulum slide mechanism when the eccentric member is driven.