A reciprocating compressor with a linear motor having an actuating means operatively coupling a reciprocating piston to the motor; and a resonant spring means mounted under constant compression to the actuating means by the mutual seating of a pair of supporting surface portions, at least one of the
A reciprocating compressor with a linear motor having an actuating means operatively coupling a reciprocating piston to the motor; and a resonant spring means mounted under constant compression to the actuating means by the mutual seating of a pair of supporting surface portions, at least one of the latter being operatively associated with one of the spring means and the actuating means, against a respective pair of convex surface portions, each of the latter being operatively associated with the other of said parts, the convex surface portions being symmetrical and opposite in relation to the axis of cylinder, the supporting surface portions and the convex surface portions being mutually seated and operatively associated with the respective parts of the spring means and the actuating means, in order to transmit, by the mutually seated surface portions, the opposite axial forces with such intensity as to minimize the moments on the piston.
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The invention claimed is: 1. A reciprocating compressor with a linear motor, comprising: a shell; and a motor-compressor assembly including: a reference assembly affixed inside the shell and formed by a motor and a cylinder; a resonant assembly formed by a piston reciprocating inside the cylinder,
The invention claimed is: 1. A reciprocating compressor with a linear motor, comprising: a shell; and a motor-compressor assembly including: a reference assembly affixed inside the shell and formed by a motor and a cylinder; a resonant assembly formed by a piston reciprocating inside the cylinder, and by an actuating means operatively coupling the piston to the motor; and a resonant spring means, under constant compression, which is simultaneously mounted to the resonant assembly and to the reference assembly, and which is resiliently and axially deformable in the displacement direction of the piston, wherein the spring means is mounted to the actuating means by the mutual seating of a pair of supporting surface portions, at least one of the latter being operatively associated with one of the parts of the spring means and the actuating means, against a respective pair of convex surface portions, each of the latter being operatively associated with the other of said parts, the convex surface portions being symmetrical and opposite in relation to the axis of the cylinder, the supporting surface portions and the convex surface portions being mutually seated and operatively associated with the respective parts of the spring means and the actuating means, in order to transmit, by the mutually seated surface portions, the opposite axial forces actuating on said parts, with such intensity as to minimize the occurrence of moments on the piston. 2. The reciprocating compressor according to claim 1, wherein the pair of supporting surface portions and the pair of convex surface portions are operatively associated, each pair, with the same respective part. 3. The reciprocating compressor according to claim 1, wherein at least one of the pairs of the supporting surface portions and the convex surface portions is incorporated to a respective part of the actuating means and the spring means. 4. The reciprocating compressor according to claim 3, characterized in that wherein it includes at least one spacing body presenting two seating surfaces disposed in planes orthogonal to the axis of the cylinder and which are axially spaced from each other, each of said seating surfaces facing a respective end surface adjacent to one of the parts of the spring means and the actuating means, at least one of said seating surfaces carrying one of the pairs of the convex surface portions and the supporting surface portions. 5. The reciprocating compressor according to claim 4, wherein each seating surface of a spacing body carries a respective pair of one of the supporting surface portions and the convex surface portions disposed in an alignment orthogonal to the alignment defined by the pair of one of said surfaces carried in the other seating surface. 6. The reciprocating compressor according to claim 5, wherein each seating surface incorporates a respective pair of convex surface portions. 7. The reciprocating compressor according to claim 6, wherein the spacing body is a bent ring. 8. The reciprocating compressor according to claim 7, wherein it includes at least one supporting ring, each seated onto a respective part of the spring means and the actuating means, and each defining a respective pair of supporting surface portions. 9. The reciprocating compressor according to claim 1, wherein the pair of convex surface portions is angularly disposed in relation to a first contact portion of the spring means in relation to the pair of supporting surface portions at an angle (φ) taken from the seating direction of the spring means in relation to said contact portion and corresponding to a determined percentage of concentration of forces reacting against the compression of the spring means higher than 50% of said forces on the piston. 10. The reciprocating compressor according to claim 9, wherein said angle (φ) is defined between 90 and 180 degrees from the seating direction of the last coil of the spring means. 11. The reciprocating compressor according to claim 10, wherein said angle (φ) is preferably between 110 and 120 degrees. 12. The reciprocating compressor according to claim 11, wherein said angle (φ) is preferably between 115 and 118 degrees. 13. The reciprocating compressor according to claim 1, wherein the convex surface portions are defined by cylindrical surface portions with the axis orthogonal to the axis of the cylinder. 14. The reciprocating compressor according to claim 1, wherein the convex surface portions are defined by spherical surface portions. 15. The reciprocating compressor according to claim 1, wherein the supporting surface portions are defined by concave surfaces. 16. The reciprocating compressor according to claim 12, wherein the spring means comprises a pair of helical springs, each being mounted against an adjacent surface to the actuating means by the pairs of the convex surface portions and the supporting surface portions.
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