The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 04, 2006
Filed:
Mar. 09, 2004
Iwao Harada, Mito, JP;
Masakazu Matsumoto, Kudamatsu, JP;
Iwao Harada, Mito, JP;
Masakazu Matsumoto, Kudamatsu, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A railway vehicle includes an air intakeprovided at a nose portion of a leading vehiclean air tank (reservoir)for storing intake air, and an air outletby which air is sucked in (breathed in) during entry of the leading vehicle to a tunnel and discharged within the tunnel, so as to reduce the pressure generated at the nose portion and to cut down micropressure waves. When the nose of the leading vehicleenters a tunnelan intake control valveof the air reservoir, depressurized to below atmospheric pressure (1 atm), opens to take in air through an air inletvia a pathinto the air reservoirWhen the whole leading vehicle enters the tunnel, the intake control valvecloses, and air is discharged through the outletvia a pump
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile