Pumps – With muffler acting on pump fluid
Reexamination Certificate
2007-05-01
2007-05-01
Rodriguez, William H. (Department: 3746)
Pumps
With muffler acting on pump fluid
C417S540000, C181S403000
Reexamination Certificate
active
10870094
ABSTRACT:
A reciprocating piston compressor having a suction muffler and a pair of discharge mufflers to attenuate noise created by the primary pumping frequency in the primary pumping pulse. The suction muffler is disposed along a suction tube extending between the motor cap and the cylinder head of the compressor. The discharge mufflers are positioned in series within the compressor to receive discharge gases from the compression mechanism and are spaced one quarter of a wavelength from each other so as to sequentially diminish the problematic or noisy frequencies created during compressor operation. The motor/compressor assembly including the motor and compression mechanism is mounted to the interior surface of the compressor housing by spring mounts. These mounted are secured to the housing to define the position of the nodes and anti-nodes of the frequency created in the housing to reduce noise produced by natural frequencies during compressor operation.
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DiFlora Michael A
Gopinathan Anil
Paczuski Andrew W
Shafer Ronny A
Tomell Phillip A
Baker & Daniels LLP
Rodriguez William H.
Tecumseh Products Company
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