Abstract: A resonant arrangement for a linear compressor, comprising a non-resonant assembly formed by a motor and a cylinder (1); a resonant assembly formed by a piston (2) reciprocating inside the cylinder (1); an actuating means (3) operatively coupling the piston (2) to the motor, and at least one spring means presenting an elongated tubular body (50) which is coaxial to the axis of the piston (2) and is operatively coupled to the actuating means (3) and to the non-resonant assembly, said tubular body (50) having at least part of the extension therof folded in circumferential sectors (53), each circumferential sector (53) being elastically deformed in the axial direction upon displacement of the piston (2).

Abstract: A constructive arrangement for a resonant compressor comprising a shell (1), within which are mounted: a non-resonant assembly formed by a motor and a cylinder (2), said motor having a coil (6) generating a magnetic flow that travels through the shell (1); a resonant assembly formed by a piston (10) reciprocating inside the cylinder (2) and by an actuating means (3) operatively coupling the piston (10) to the motor, said arrangement comprising a magnetic insulating means, which is affixed to one of the parts defined by the shell (1), by the resonant assembly, and by the non-resonant assembly, and which is arranged so as to interrupt the magnetic flow path between the shell (1) and at least one of the parts defined by the piston (10) and the cylinder (2) in a direction substantially parallel to the displacement direction of the piston (10).

Abstract: A linear compressor vertically mounted inside a hermetic shell (8) and including: a reference assembly with elements including a block defining a cylinder (2); a resonant assembly with elements including an actuator (4) that carries a piston (1) within the cylinder (2). There are provided: a first resilient element (20) mounted between the resonant assembly (1,4,5) and one end of the shell (8); a second resilient element (21) mounted between the reference assembly (2) and the other end of the shell (8); and a third resilient element (22) mounted between the reference assembly (2) and the resonant assembly (4), with the first and the second resilient elements (20,21) applying opposite forces to the shell (8) upon reciprocation of the piston (1).

Abstract: A vibration dampening system for a reciprocating compressor with a linear motor of the type comprising a motor-compressor assembly having a reference assembly (20) formed by a motor and a cylinder (4) and mounted inside a shell (1) and a resonant assembly (10) formed by a resonant spring (3) and piston (2) reciprocating inside the cylinder (4), the system comprising at least one first balancing means (30) connecting the reference assembly (20) to the shell (1), and at least one second balancing means (40) connecting the resonant assembly (10) to the shell (1), both balancing means (30, 40) actuating according to the displacement direction of the piston (2), said second balancing means (40) presenting a coefficient of elasticity proportional to the coefficient of elasticity of the first balancing means (30) by a factor defined by the ratio of the masses of the resonant assembly (10) and of the reference assembly (20), respectively.

Abstract: A process for forming an annular stack of metallic laminations for the stator of a linear motor and an annular stack of metallic laminations. Said process comprises the steps of: a—providing a rectilinear alignment for a plurality of metallic laminations (10) having their internal edges (11) mutually seated and defining a flat surface (15); b—affixing to each other the internal edges (11) of the rectilinear alignment of the metallic laminations (10), in order to allow only the relative and limited angular displacement of each said metallic lamination (10) around its respective internal edge (11); and c—deforming the alignment of the metallic laminations (10) affixed to each other to an annular configuration, with the internal edges (11) of the metallic laminations (10) defining an internal cylindrical surface (16) of said annular stack.

Abstract: A position sensor is provided, particularly a sensor applicable to a linear compressor, for detecting the position of the piston and preventing the latter from knocking against the head located at the end of its stroke. More particularly, there is provided a sensor, particularly one that is employable in detecting the position of a piston of a compressor, the piston being axially displaceable inside a hollowed body, the compressor comprising a valve blade, the blade being positioned between the head and the hollowed body, the sensor comprising a probe electrically connected to a control circuit, the probe being capable of detecting the passage of the piston by a point of the hollowed body and signaling this to the control circuit. An associated compressor employing such a sensor is also provided.

Abstract: An oil pumping system for a reciprocating hermetic compressor presenting a shell (1), which defines in the interior thereof an oil sump (5); a motor compressor assembly; and an oil pump means (10) that is coupled to the compressor by at least one dampening resilient means (20) that is dimensioned to reduce the amplitude of displacement of said oil pump means (10) to a value that is calculated so that the ratio between the natural frequency of resonance (Wn) of said oil pump means (10) and an operation frequency (W) of the compressor results in a ratio between the displacements of the oil pump means (10) and of said compressor with a value inferior to one.

Abstract: A linear compressor vertically mounted inside a hermetic shell (8) and including: a reference assembly with elements including a block defining a cylinder (2); a resonant assembly with elements including an actuator (4) that carries a piston (1); and a linear electric motor including a magnet member (5) and a coil (6) for driving the actuator that reciprocates the piston (1) within the cylinder (2). There are provided: a first resilient element (20) mounted between the resonant assembly (1, 4, 5) and one end of the shell (8); a second resilient element (21) mounted between the reference assembly (2) and the other end of the shell (8); and a third resilient element (22) mounted between the reference assembly (2) and the resonant assembly (4), with the first and the second resilient elements (20, 21) applying opposite forces to the shell (8) upon reciprocation of the piston (1).

Abstract: A linear compressor having a cylinder (2) and a piston (1) that is moved by an electric linear motor (4, 5, 6) is provided with one or more elastic elements (30, 50) made of steel wire having a central volute portion (30a, 50a). A leg (30b, 30c, 50b, 50c) extends from each end of the central volute portion (30a, 50a). In a first embodiment, one of the legs (30b) is fastened internally of the piston (1) and the other leg (30c) to a part of the cylinder (2). In a second embodiment, the central volute portion (50a) is mounted directly to the piston (1) and the two legs (50b, 50c) are fixedly connected to the cylinder (2). When the piston is moved by the action of the electric linear motor, the wire of the central volute portion of the elastic element distorts and stretches in the direction of travel of the piston. It is preferred that several elastic elements be mounted to the piston (1) having like portions of the central volute portion angularly spaced apart.

Abstract: A reciprocating compressor with alinear motor comprising a shell (1) and a motor-compressor assembly, including: a motor; a piston (3) reciprocating inside the cylinder (2), and an actuating means (4) operatively coupling the piston (3) to the motor; and a resonant spring means (10), which is mounted under constant compression to the actuating means (4) by the mutual seating of a pair of supporting surface portions (40), at least one of the latter being operatively associated with one of the parts of the spring means (10) and the actuating means (4), against a respective pair of convex surface portions (50), each of the latter being operatively associated with the other of said parts, the convex surface portions (50) being symmetrical and opposite in relation to the axis of cylinder (2), the supporting surface portions (40) and the convex surface portions (50) being mutually seated and operatively associated with the respective parts of the spring means (10) and the actuating means (4), in order to transmit,

Abstract: A piston lubrication system for a reciprocating compressor with a linear motor, of the type comprising: a hermetic shell (1) defining therewithin an oil sump (2) and affixing a cylinder (4), inside which is lodged a reciprocating piston (10) defining a radial gap (5) with the cylinder (4); and a pump means (3) supplying lubricant oil from the oil sump (2) to the radial gap (5), said system comprising: at least one oil supply duct (30) having a lower end (31) coupled to the pump means (3), and an upper end (32) carried by the piston (10) and opened to the radial gap (5); and at least one oil return duct (40) carried by the piston (10) and having an inlet end (41) opened to the radial gap (5) and an opposite outlet end (42) opened to the oil sump (2).

Abstract: A process for forming an annular stack of metallic laminations for the stator of a linear motor and an annular stack of metallic laminations. Said process comprises the steps of: a—providing a rectilinear alignment for a plurality of metallic laminations (10) having their internal edges (11) mutually seated and defining a flat surface (15); b—affixing to each other the internal edges (11) of 17 the rectilinear alignment of the metallic laminations (10), in order to allow only the relative and limited angular displacement of each said metallic lamination (10) around its respective internal edge (11); and c—deforming the alignment of the metallic laminations (10) affixed to each other to an annular configuration, with the internal edges (11) of the metallic laminations (10) defining an internal cylindrical surface (16) of said annular stack.

Abstract: A reciprocating compressor includes a linear motor having a piston reciprocating inside a cylinder. A cylinder head is provided with suction and discharge orifices. A valve means is mounted inside the cylinder and has an operative position, seated against the discharge orifice. The operative position is defined when the top of the piston is within a certain distance from the cylinder head. The distance is defined, so that, at the end of the compression stroke of the piston, a determined pressure is reached inside the cylinder, and the pressure results in a force on the piston. The force is opposite to a force which is impelling the piston and which is sufficient to interrupt its compression stroke before impacting the cylinder head.

Abstract: A resonant assembly for a reciprocating compressor driven by a linear motor. The compressor includes a piston (2), driven by an actuator (3), which reciprocates inside a cylinder (1a) provided with an end closed by a head. The assembly comprises a resonant element, defining by a single piece, a rod portion (11) and a spring portion (12). The spring portion is affixed to a non-resonant structure (1) of the compressor at a plurality of points which are symmetric in relation to the longitudinal axis of the cylinder and lie on a plane orthogonal to the longitudinal axis of the cylinder.

Abstract: A vibration dampening system for a reciprocating compressor with a linear motor of the type comprising a motor-compressor assembly having a reference assembly (20) formed by a motor and a cylinder (4) and mounted inside a shell (1) and a resonant assembly (10) formed by a resonant spring (3) and a piston (2) reciprocating inside the cylinder (4), said system comprising at least one first balancing means (30) connecting the reference assembly (20) to the shell (1), and at least one second balancing means (40) connecting the resonant assembly (10) to the shell (1), both balancing means (30, 40) actuating according to the displacement direction of the piston (2), said second balancing means (40) presenting a coefficient of elasticity proportional to the coefficient of elasticity of the first balancing means (30), by a factor defined by the ratio of the masses of the resonant assembly (10) and of the reference assembly (20), respectively.

Abstract: A position sensor (10) is described, particularly a sensor (10) applicable to a linear compressor (15), for detecting the position of the piston (1) and preventing the latter from knocking against the head (3) located at the end of its stroke. One of the objectives of the present invention is to provide a sensor (10) capable of detecting the position of the piston (1), which can solve the problem of collision of the latter with the head (3) altogether and that is easy to build and to install, thus reducing the production and manufacture costs of the compressor (15). The piston (1) being axially displaceable inside a hollowed body (2), the compressor (15) comprising a valve blade (9), the blade being positioned between the head (3) and the hollowed body (2), the sensor (10) comprising a probe (20) electrically connected to a control circuit (12), the probe (20) being capable of detecting the passage of the piston (1) by a point of the hollowed body (2) and signalling this to the control circuit (12).

Abstract: A reciprocating compressor with a linear motor, having a piston (1) reciprocating inside a cylinder (2); a cylinder head (5) provided with suction and discharge orifices (5a, 5b), and a valve means (10) mounted inside the cylinder (2) and having an operative position, seated against the discharge orifice (5b), defined when the top of the piston (1) is within a certain distance (D) from the cylinder head (5), said distance being defined, so that, at the end of the compression stroke of the piston (1), be reached inside the cylinder (2) a determined pressure that will result in a force on the piston (1) opposite to that force which is impelling said piston (1) and which is sufficient to interrupt its compression stroke before impacting the cylinder head (5).

Abstract: A rotary compressor having a cylinder within which an eccentric piston is rotated. A vane has one end mounted in a radial slot in the cylinder and an insert is mounted in the other end of the vane. The insert has a concave face to contact the outer surface of the piston as it rotates and an engaging element in the form of a key lodged in slots in the insert and the piston, acts simultaneously on the piston and insert and restrains the piston from rotating.