A valve plate assembly for a compressor according to the principles of the present disclosure includes a valve plate and a suction valve retainer. The valve plate is configured to separate suction-pressure working fluid entering a cylinder of the compressor from discharge-pressure working fluid exiting the cylinder of the compressor, the valve plate defining a discharge valve seat. The suction valve retainer is configured to retain a suction valve within a suction valve seat disposed about a central longitudinal axis of the cylinder and to extend radially outward from the central longitudinal axis of the cylinder without extending beyond a suction passage of the compressor.

A piston for a compressor and a compressor including the same are disclosed. The piston is used in a compressor which compresses and discharges refrigerant suctioned into a cylinder. The piston includes a cylindrical slider and a head. The slider has an outer diameter corresponding to an inner diameter of the cylinder and defines a suction space in which the refrigerant suctioned in the cylinder is received. The head is coupled to the slider, in which a compression space is provided in the front and a suction space is provided in the rear, and in which a suction port communicating with the suction space and the compression space is formed, in which the head includes an inner body and an outer body surrounding the inner body, and the suction port is formed between the inner body and the outer body.

A cylinder head assembly for a compressor according to the present disclosure includes a valve plate and a cylinder head. The valve plate is configured to mount to a mounting surface of the compressor. The valve plate includes a suction chamber, a suction passage providing fluid communication between the suction chamber and a cylinder of the compressor, a suction valve seat through which the suction passage extends, and a discharge passage extending through the valve plate and defined by a discharge valve seat. The cylinder head at least partially covers the valve plate and defines a discharge chamber that is in selective fluid communication with the cylinder via the discharge passage. The cylinder head and the valve plate are formed together as a unitary body.

A direct drive air pump has a motor and a pumping mechanism connected to an end of the motor, and further has an auxiliary pumping mechanism connected to the other end of the motor, and a tube connected with the pumping mechanism and the auxiliary pumping mechanism. In each one of the pumping mechanism and the auxiliary pumping mechanism, a cylindrical body has a top plate having an exhaust hole. A single O-ring is used to seal between the cylindrical body and a cylindrical cover for reducing the sealing portions. A valve block of a non-return valve can co-work with a spring for opening and closing the exhaust hole. The valve block is soft for closing the exhaust hole well and reducing the noise of collision between the valve block and the top plate.

A piston pump includes a perforated disk as a throttle, in a central hole of which an outlet valve is arranged and its inner edge is fixed externally on a cylinder sleeve base of the piston pump and an outer edge of which lies with prestress on an annular support. Brake fluid displaced out of the piston pump lifts the perforated disk-shaped throttle off from the annular support, with which a dynamic throttle is formed. A throttle channel which negotiates the annular support in the perforated disk-shaped throttle also enables a throughflow in the case of a throttle lying on the annular support.

A compressor may include a housing, a piston, a valve plate, a discharge valve and a head cover. The housing defines a cylinder. The piston is disposed within the housing and is movable within the cylinder. The valve plate is mounted to the housing and may include a discharge passage extending through the valve plate and defined by a discharge valve seat. The discharge valve is movable between a first position in which the discharge valve is seated on the discharge valve seat to restrict fluid flow through the discharge passage and a second position in which the discharge valve is spaced apart from the discharge valve seat to allow fluid flow through the discharge passage. The head cover may include a guide post including a pocket that receives a valve stem of the discharge valve.

A valve structure includes: a valve seat part furnished with a valve hole portion having a valve hole connecting a first gas chamber to a second gas chamber, and a valve-body supporting wall part laterally extending from the valve hole portion; an elastic valve-body member furnished with a first elastic platelike section disposed paralleling the valve hole portion, and a second elastic platelike section extending from the first elastic platelike section, wherein the first elastic platelike section is elastically deformable against the second elastic platelike section under pressure differential between the first gas chamber and the second gas chamber such as to open the valve hole; and an elastic pressing member arranged paralleling the second elastic platelike section such as to elastically deform together with the elastic valve-body member, and being of planar form configured so as to expose the first elastic platelike section.

An improved air compressor is provided. The air compressor includes a cylinder block having a head deck that defines a piston bore for reciprocal movement of a piston therein. The head deck further includes first and second ramped surfaces that slope downward toward the peripheral edge of the piston bore. A valve plate is in direct contact with the upper surface of the head deck, the valve plate having a leaf valve. During an intake stroke of the piston, the leaf valve deflects downward into direct engagement with the first and second ramped surfaces. Because the air compressor lacks a lower gasket between the valve plate and the head deck, the cost and assembly time associated with the lower gasket are eliminated.

The present disclosure relates to a piston for a piston pump, in particular a piston compressor, including a piston main body and a piston crown valve that includes a lamellar valve plate. The lamellar valve plate is fastened to the piston main body by a collar ring.

A compressor may include a housing, a piston, and a cylinder head assembly. The housing defines a cylinder and a first valve seat defining a recess. The piston is movable within the cylinder to define a compression chamber. The cylinder head assembly is mounted on the housing and includes a valve plate, a suction valve, a discharge valve and a head cover. The valve plate may be mounted to the mounting surface and may include a suction plenum, a suction passage providing fluid communication between the suction plenum and the cylinder, and a discharge passage. The suction valve can seat on the first valve seat to allow fluid flow through the suction passage. The head cover may include a discharge chamber and an integrally formed guide post extending into the discharge chamber. The guide post may include a pocket that receives a discharge valve stem for reciprocation therein.