Heating and cooling device
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United States of America Patent
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Nov 19, 2013
Grant Date -
Jun 20, 2013
app pub date -
Sep 10, 2012
filing date -
Dec 19, 2011
priority date (Note) -
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Abstract
A heating and cooling device includes a cylinder having a chamber for receiving a gas. A guiding groove is defined in an inner periphery of the chamber. A piston assembly is movably received in the chamber of the cylinder. The piston assembly includes first and second pistons and a connecting rod connected to the first and second pistons. The first piston is mounted to a side of the second piston and rotatable relative to the connecting rod. Each of the first and second pistons includes a plurality of openings. A guiding block is formed on an outer periphery of the first piston and is slideably received in the guiding groove.
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