US Patent No: 7,527,053

Number of patents in Portfolio can not be more than 2000

Method and apparatus for attenuating compressor noise

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ALSO PUBLISHED AS: 20050166921
ATTORNEY / AGENT: (SPONSORED)
 

Importance

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Abstract

The invention comprises a method and apparatus for reducing the noise generated by compressors, including Roots-type blowers. The invention has particular use for reducing noise generated by compressors used in mechanical ventilators, though the advantages thereof may be realized in many different applications. One embodiment of the invention comprises a noise-attenuating gas flow path for a compressor contained in a portable ventilator housing. In one embodiment, the gas flow path comprises a plurality of chambers interconnected by flow tubes. The flow path is folded so as to fit into the limited space of a portable ventilator housing. The dimensions of the chambers and the flow tubes are selected so that an impedance mismatch is created between the chambers and the flow tubes. In one embodiment of the invention, the flow path comprises one or more perforated tubes located in one or more of the chambers. The perforated tube has a port through which gas is accepted and at least one exterior tube through which gas exits. Impedance mismatches are created between the inlet chamber and the exterior tubes and between the exterior tubes and the chamber in which the perforated tube is located, which are useful in attenuating noise. One embodiment of the invention comprises a noise attenuating mounting system for a compressor. The mounting system comprises flexible mounts that cooperate to dampen vibrations generated by the compressor.

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First Claim

Related Publications

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Patent Owner(s)

Patent OwnerAddressTotal Patents
CAREFUSION 203, INC.SAN DIEGO, CA9
PULMONETIC SYSTEMS, INC.SAN DIEGO, CA1

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
DeVries, Douglas F - 33 751
Williams, Malcolm R San Clemente, CA 14 373

Cited Art

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Other [Check patent profile for assignment information] (14)
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Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
COVIDIEN LP (2)
8,335,992 Visual indication of settings changes on a ventilator graphical user interface 0 2009
8,443,294 Visual indication of alarms on a ventilator graphical user interface 0 2010
 
CAREFUSION 203, INC. (1)
8,156,937 Portable ventilator system 0 2005
 
RESMED LIMITED (1)
8,267,084 Recognition system for an apparatus that delivers breathable gas to a patient 0 2006

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
7.5 Year Payment $3600.00 $1800.00 $900.00 Nov 5, 2016
11.5 Year Payment $7400.00 $3700.00 $1850.00 Nov 5, 2020
Fee Large entity fee small entity fee micro entity fee
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00