VACUUM MACHINE, COMPRESSOR, AND PISTON
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United States of America Patent
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Issued Date -
Mar 3, 2016
app pub date -
Aug 10, 2015
filing date -
Aug 26, 2014
priority date (Note) -
Published
status (Latency Note)
Importance
Abstract
A vacuum machine includes: a crankcase; a cylinder body fixed to the crankcase; a cylinder head fixed to a distal end of the cylinder body; and a piston reciprocating within the cylinder body, wherein the piston includes: a piston rod; a piston head fixed to a distal end of the piston rod and defining a chamber in cooperation with the cylinder body and the cylinder head; and a check valve arranged within a space formed between the piston rod and the piston head, the piston rod and the piston head each includes a through-hole communicating with the space, and the check valve is elastically deformable within the space so as to open and close one of the through holes of the piston rod and the piston head.
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