A piston of an air compressor contains at least one fixing bolt configured to fix a plane of a top of a head of the piston in at least one air stop sheet. A respective one of the at least one air stop sheet includes at least one bending section and at least one acting zone opposite to the at least one bending section and configured to cover at least one air orifice, and a back surface of the at least one acting zone of the respective one air stop sheet turns on relative to the plane of the top of the head at an open angle θ, thus producing an air flowing space. A pressure of a cylinder balances with atmosphere, and the piston is not stopped by a back-pressure resistance to move smoothly in upward and downward moving strokes after the air stop sheet moves again.

An air stop sheet of a piston of a cylinder, the piston is accommodated in an air compressor, and an air stop sheet is accommodated on a head of the piston. The air stop sheet includes a bending section having a positioning zone and an acting zone and configured to be a boundary line of the acting zone and the positioning zone. The acting zone backing the cylinder turns on relative to the plane of the head at an open angle θ, thus producing an air flowing space. A piston rod extends downward from the head and includes a cavity, an air conduit, a column, and a spring configured to abut against the acting zone of the air stop sheet. The air stop sheet is pushed by the spring to turn on at an open angle θ, and the air conduit and the air channel communicate with atmosphere.

An air stop sheet of a piston of a cylinder, the piston is accommodated in a compressor, and an air stop sheet is accommodated on a head of the piston. The air stop sheet includes a bending section having a positioning zone and an acting zone. The bending section is a boundary line of the acting zone and the positioning zone so that a positive surface of the air stop sheet forms an obtuse angle less than 180 degrees, and a back surface of the acting zone of the air stop sheet backing the top of the cylinder turns on relative to the plane of the top of the head at an open angle θ, thus producing an air flowing space. A piston rod extends downward from the head and includes an air conduit communicating with the air channel.

A hermetic compressor equipped with a valve assembly may include a valve plate having one suction port and a plurality of discharge ports; a suction valve provided at a first surface of the valve plate; a discharge valve provided at a second surface of the valve plate and having one fixing portion and a plurality of opening and closing portions that extends from the one fixing portion to respectively open and close the plurality of discharge ports; and a valve stopper that is fixed to the valve plate and limits a degree of opening of the opening and closing portions of the discharge valve. Accordingly, the opening and closing portions of the discharge valve may be reduced in size to thereby reduce inertia of the discharge valve. Thus, response of the discharge valve may be increased while simplifying a structure and assembly of the discharge valve.

A piston of an air compressor is actuated by a motor to move in a cylinder. The piston includes a head, an air stop sheet having a first bending section which is a boundary line of an acting area and a positioning zone of the air stop sheet, and a back surface of the acting zone backing the top of the cylinder turns on relative to a plane of a top of the head at an open angle θ1. The acting zone has a noncircular spacing groove, a neck, and a second bending section. The head includes a piston rod having a cavity, an air conduit, a column, and a spring. The air stop sheet is forced by the spring to locate in the acting zone backing the cylinder and a plane of a top of the head at an open angle θ1.

An air compressor contains a piston actuated by a motor to move in a cylinder. The piston includes an air stop sheet mounted on a top support plate thereof. The air stop sheet includes a bending section having a positioning zone and an acting zone located opposite to the positioning zone and configured to cover an air channel of the piston. The bending section is a boundary axis of the acting area and the positioning zone of the air stop sheet so that a top of the air stop sheet facing the cylinder forms an obtuse angle less than 180 degrees, and a back surface of the acting zone of the air stop sheet backing a top of the cylinder turns on relative to a plane of a top of the top support plate at an open angle θ, thus producing an air flowing space.

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 θ2.

A valve includes: a first plate having a first vent hole; a second plate having a second vent hole; a valve chamber positioned between the first plate and the second plate; a valve body including a third vent hole; an exhaust path-forming plate forming a first flow path between the exhaust path-forming plate and the valve body, forming a second flow path between the exhaust path-forming plate and the second plate, and having a fourth vent hole through which the first flow path is in communication with the second flow path; and a fifth vent hole. The first flow path establishes communication between the second vent hole and the fourth vent hole, and the second flow path establishes communication between the fourth vent hole and the fifth vent hole.

The present invention is inherent to a shape memory alloy actuated fluidic subassembly (10) and to an equipment incorporating it as dispensing device, wherein actuation of the shape memory alloy wires (16, 16′) causes a fluid-tight reservoir (17″) to be compressed by a lid (18) so as to reduce its volume from a maximum volume Vo to a minimum volume V1, this reduction resulting in a pressure increase that causes the opening of an outlet flap (13″) and the dispensing of a fluid through an outlet channel (13).

The present relation relates to the technological field of compressors. Problem to be solved: The current reciprocating compressors valves arrangements includes valves whose flexion area suffer from direct interference of the body disposed immediately over said valve. Such feature, besides damaging de valve movement, further causes wear phenomena on the flexion areas of the valve, which can result in critical fault of the valve and consequently of the compressor. Resolution of the problem: It is revealed a valve arrange whose end valve capable of moving includes a flexion area previously defined and intentionally misaligned with any contact area of the body immediately disposed over the valve.