Whirlpool S.a.

Ivan Da Costa Pereira Filho

Dietmar Erich Bernhard Lilie

Marcio Luiz Todescat

Fabricio Caldeira Possamai

Hugo Renato Seibel

Fabio Henrique Klein

Fábio Henrique Klein

The piston is provided with a pair of radial holes opened to an external circumferential recess and lodging and retaining one respective end of a pin, to which is coupled a driving mechanism to reciprocate the piston inside a cylinder. The radial holes are completely sealed in order that the axial extension of a bottom radial gap provided by a bottom bearing surface of the piston work together with the axial extension of a top radial gap provided by a top bearing surface to provide the required leakage restriction of the refrigerant gas and also the required bearing of the piston inside the cylinder. The axial extension of each of the top bearing surface and of the bottom bearing surface is insufficient to provide by itself said required leakage restriction of the refrigerant gas.

Piston for a reciprocating hermetic compressor

A mounting arrangement for the piston of a reciprocating hermetic compressor, comprising: a cylinder (), inside which is defined a compression chamber (C); and a piston () provided with a pair of radial holes (), each lodging and retaining one end of a pin (), to which is coupled a driving mechanism of the compressor to reciprocate the piston () inside the cylinder (), said radial holes () being completely sealed in relation to the radial gaps () of the bearing surfaces () of the piston (), so that both radial gaps () operate as means for restraining the leakage of refrigerant gas outwardly and inwardly in relation to the compression chamber (C).

Mounting arrangement for the piston of a reciprocating hermetic compressor

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Ivan Da Costa Pereira Filho