A mechanical link (100, FIG. 5), the mechanical link comprising a first arm (120), a second arm (140) and an interconnection member (160), wherein: the first arm is rotatable about a first axis of the interconnection member; the second arm is rotatable about a second axis of the interconnection member, the second axis being orthogonal to the first axis; and wherein: a flexible member (400) extends along the first and second arms and is adapted to accommodate rotation of the arms about the first and second axes, the flexible member having a single coiled portion (440) which is received within the interconnection member such that the coiled portion can coil and uncoil to accommodate rotation of the first arm, wherein the coiled portion is further configured to twist about an axis of the flexible member to accommodate rotation of the second arm.

A scroll-type compressor includes: a movable scroll including a low-stage movable tooth portion having a spiral shape and protruding from a first side of a movable substrate portion in an axial direction, and a high-stage movable tooth portion having a spiral shape and protruding from a second side of the movable substrate portion in the axial direction; and a shaft arranged to extend through the movable substrate portion and causing the movable scroll to undergo revolution motion. A low-stage compression mechanism and a high-stage movable compression mechanism are provided on opposite sides of the movable substrate portion in the axial direction. The numbers of curling of the low-stage movable tooth portion and the high-stage movable tooth portion are set to be one.

A scroll compressor is provided that may include a casing including a rotational shaft, a cover fixed inside of the casing to partition the inside of the casing into a suction space and a discharge space, a first scroll revolved by rotation of the rotational shaft, a second scroll disposed on or at one side of the first scroll to define a compression chamber together with the first scroll, the second scroll including a discharge, through which a refrigerant pressed in the compression chamber may be discharged, a switching device movably disposed on or at one side of the discharge to selectively open and close the discharge, a back pressure portion including a moving guide that accommodates at least a portion of the switching device, and a top surface that covers one side of the switching device; and an adhesion preventer that reduces a contact area between the switching device and at least a portion of the back pressure portion.

A compressor may include a first scroll member, a second scroll member and a drive shaft. The first scroll member may include a first end plate defining a first discharge port and a first spiral wrap extending from the first end plate. The second scroll member may include a second end plate defining a first variable volume ratio port and a second spiral wrap extending from the second end plate and meshingly engaged with the first spiral wrap and forming compression pockets. The variable volume ratio port may be located radially outward relative to the first discharge port and in communication with a first compression pocket. The drive shaft may be engaged with the second scroll member and driving orbital displacement of the second scroll member relative to the first scroll member.

The height measured from the bottom surfaces of support legs is set to be 2.5 or more times as great as the outer diameter of the compressor body, the height of the center of gravity measured from the bottom surfaces of the support legs to the center of gravity is set to be ½ or less the overall height, and the support legs are provided in number of four, based on the fulfillment of Rc/cos θ<Rb<L. Here Rb is the support point radius of the compressor body, Rc is the outer radius of the compressor body, L is the distance from a longitudinal central axis of the compressor body to a longitudinal central axis of an accumulator, and θ is an angle half the angle formed between the adjacent support legs about the central axis.

Provided is a scroll compressor having an improved structure in which reliability of a compression portion can be enhanced. The scroll compressor includes a compression unit that compresses a refrigerant introduced into a body, wherein the compression unit may include: a fixed scroll fixed into the body and having an ejection hole and a fixed wrap placed at an outside of the ejection hole; and an orbiting scroll orbiting with respect to the fixed scroll and having an orbiting wrap that constitutes a compression chamber together with the fixed wrap, and wherein the orbiting wrap may include: an outer contact portion formed at an outside surface of the orbiting wrap and being adjacent to the ejection hole; and an inner contact portion formed at an inside surface of the orbiting wrap, being adjacent to the ejection hole and connected to the outer contact portion, and the compression chamber includes a first compression chamber formed when the outer contact portion contacts a first position of an inside surface of the fixed wrap at an ejection starting time of the refrigerant, and the outer contact portion is connected to the inner contact portion along a circumference of a first center circle formed to contact the first position at the ejection starting time of the refrigerant, and a center of the first center circle is placed on a normal line of the first position.

A scroll compressor includes fixed and movable scrolls, each scroll having a spiral lap placed on one surface of a plate. The lap of the fixed scroll and the lap of the movable scroll are interlocked to form a compression chamber between the laps of the scrolls which are adjacent to each other. At least one of the laps has a spiral shape in which a base radius of an involute decreases as a winding angle increases in a region extending from a winding start part to a winding middle part, and the base radius of the involute in a region extending from the winding middle part to a winding end part is larger than the smallest value of the base radius of the involute in the region extending from the winding start part to the winding middle part.

A check valve includes a valve seat portion and a reed valve element and is received in a receiving hole of an intermediate pressure refrigerant supply passage that is placed adjacent to a flow inlet of an injection port, through which a refrigerant of an intermediate pressure is injected into a compression chamber. A center of the flow inlet of the injection port is offset from a central axis of a valve seat passage formed in the valve seat portion.

Rotary vane internal combustion engine comprises of two rotors, nested in each other, placed in a cylindrical housing, wherein each rotor has at least two radial vanes rigidly attached to the rotor that form chambers for intake, compression, combustion, and exhaust. Each rotor, alternately engages with a shaft by overrunning one-way clutches and held from turning back, through the cushioning mechanisms, mounted on flywheels, which are rigidly attached on the shaft, wherein the assembled rotors from the outside are rigidly closed by flanges on each of which is mounted at least one blade, which are placed into formed cavity between rotors and caps of the housing thereby forming two cooling chambers through which coolant circulates around rotors through openings in the housing and through longitudinal grooves in the shaft. On the vanes mounted cylindrical and conical seals that exclude the need for lubrication.

The present invention provides a rotary engine comprising: a housing provided with three lobe accommodation parts; a rotor which is provided with two lobes continuously accommodated in the lobe accommodation parts, has an intake storage part communicating with an intake port provided on the front surface-side, and has an exhaust storage part communicating with an exhaust port provided on the rear surface-side; an intake-side housing cover provided with an intake hole communicating with the intake storage part; an exhaust-side housing cover provided with an exhaust hole communicating with the exhaust storage part; and a crankshaft, wherein the flow of an exhaust gas into a stroke chamber during an intake stroke is reduced by preventing the exhaust storage part, at a portion of a section in which the exhaust port is open, from communicating with the exhaust hole during the intake stroke.