One or more techniques and/or systems are disclosed for a flap valve in a diaphragm pump. The flap valve includes a body and a self-centering hinge portion. A front portion of the body includes a front surface having a raised portion and a recessed portion. The front surface is configured to form a seal with a surface of the pump when the body is in a closed position, the surface of the pump being at an inlet or an outlet of a pumping chamber. The body is configured to allow a downstream flow of a fluid when the flap valve is in an open position. The self-centering hinge portion is operably connected to the body. The self-centering hinge portion has a dynamically changing longitudinal axis. The body is configured to simultaneously translate and rotate about the dynamically changing longitudinal axis to form the seal.

A piston of an air compressor, the air compressor including the piston actuated by a motor to move upward and downward in a cylinder. The piston contains a head accommodating an air stop sheet which has a first bending section being a boundary line of an acting area and a positioning zone of the air stop sheet. The acting zone has a noncircular spacing groove configured to separate an external portion and a circular portion, a neck, and a second bending section, such that an axial line between the circular portion and the external portion is the second bending section at an obtuse angle less than 180 degrees, and the second bending section is defined between a bottom of the circular portion and a top of the external portion at an acute angle 2.

The present invention is a wireless electronic control device, primarily intended to be attached to the impulse valve of a Hydraulic Ram Pump (HRP), enabling remote automatic and manual management of the HRP. The Electronic Ram Pump Controller (ERPC) may be used to control the HRP, through the restriction of the fluids entering/or exiting the pump. In the presented form, the Impulse Valve Manager (IVM), attaches to an impulse valve and restricts, to a varying degree, the aperture size of the impulse valve. Through this control mechanism the HRP may be sealed, started, or tunedeither remotely by a user or automatically through the ERPC's automated systems. The presented version can be augmented with valve actuation and sensing of the impulse cycle. The ERPC may be retrofitted or incorporated into the design of a new HRP.

An improved air compressor generally includes a cylinder fitted with a piston body, a main frame for mounting a motor, and an air storage container. The cylinder, which defines a plurality of exit holes, is formed integrally with the main frame. The compressed air produced in the cylinder can quickly enter the air storage container via the exit holes, so that the piston body can conduct reciprocating motion more smoothly and thus the performance of the air compressor can be increased.

A pump fluid end having a reciprocating element a discharge valve assembly, a suction valve assembly, and a suction valve stop. The reciprocating element is disposed at least partially within a reciprocating element bore of the pump fluid end. The suction valve assembly is coupled with a front end of the reciprocating element. The suction valve stop is positioned within the reciprocating element bore such that the suction valve stop contacts and applies a closing force to the suction valve assembly when the suction valve assembly is stuck open at the end of a discharge stroke of the reciprocating element.

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.

A piston for a single-stroke pump includes a pump rod, a seal ring extending about the pump rod and having a central bore, and a retaining device disposed on the pump rod and retaining the seal ring on the pump rod. In a forward stroke, the seal ring is in a first position whereby the seal ring sealingly engages the pump rod such that the seal ring and pump rod drive a fluid out of the pump chamber. When transitioning to a return stroke, the seal ring is maintained stationary relative to the pump cylinder until retaining device engages seal ring, such that seal ring is in a second position. With the seal ring in the second position, a flow path is opened between the seal ring and the pump rod, allowing fluid to flow into the pump chamber to prime the pump the next pump cycle.

Cylinder head cover (8) for a coolant compressor, wherein the cylinder head cover (8) is attachable to the cylinder head arrangement (21) in order to form a hollow space for receiving a coolant compressed by the piston, wherein the cylinder head arrangement (21) comprises a valve plate (9) attached to the cylinder housing and having an outlet opening (11) and an outlet valve (6,7), which closes the outlet opening (11) in cycles and consists of a valve spring (10) and a stop plate (6a,7a) for delimiting an opening movement of the valve spring (10).

In order to achieve a cost-efficient production and installation of the cylinder head cover (8) while assuring a secure support of the stop plate (6a,7a), it is provided according to the invention that the cylinder head cover (8) comprises at least two contact surfaces (12,13) for supporting stop plates (6a,7a) of different outlet valves (6,7) in order to adjust different opening positions of the valve springs (10) of the different outlet valves (6,7).

A compressor includes a motor, a compression mechanism including a compression chamber, and an injection mechanism including an introduction port and a check valve mechanism. The check valve mechanism includes a leaf spring, valve having a frame portion fitting an inner peripheral wall of the introduction port, a valve end portion located inside the frame portion, and a neck portion connecting the valve end portion and the frame portion together. The leaf spring valve opens the introduction port by being elastically deformed. A valve retainer is disposed between a leaf spring valve and an outflow opening surface of the introduction port. The valve end portion of the leaf spring valve in an open state contacts the valve retainer. The valve retainer is shaped to expose part of the valve end portion in the open state to the outflow opening surface of the introduction port.

A method of controlling a gas compression system includes comparing an engine load of an engine of the gas compression system during operation to a load threshold and controlling a suction valve coupled to an intake of a reciprocating compressor. The suction valve is controlled based at least in part on the comparison of the engine load to the load threshold. Controlling the suction valve includes incrementing the suction valve toward a closed position to reduce flow of a gas into the intake when the engine load is greater than or equal to the load threshold.