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:
Sep. 30, 1997
Filed:
Dec. 28, 1994
Kenji Homma, Kanagawa-ken, JP;
Hironobu Nishi, Kanagawa-ken, JP;
Abstract
The present invention relates to a heat treatment apparatus, specifically a valve device for use in an exhaust system of a low pressure heat treatment furnace, which comprises urging device for urging a valve body in a valve closing direction, and a drive unit for opening/closing the valve body against an urging force of the urging device. An interconnection releasing mechanism is provided between the driving unit and the valve rod of the valve body, the interconnection releasing mechanism connecting both with each other, and releasing their connection in an emergency. Thus, an exhaust system of the low pressure heat treatment furnace is instantaneously shut off in an emergency to prevent reverse flow of exhaust gas into the furnace. An evacuation fine adjustment gap is defined between the periphery of the valve body and that of the valve casing for facilitating evacuation control.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile