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:
May. 14, 2002
Filed:
Sep. 01, 2000
Kazuhito Watanabe, Tama, JP;
Yoshihiro Katsumata, Fujiyoshida, JP;
Nobuyuki Takahashi, Sagamihara, JP;
Anelva Corporation, , JP;
Abstract
To be able to reduce the size of a drive part and, as a result, to achieve the reduction in size and the lowering of manufacturing cots of a gate valve. An open/close mechanism is configured from a turning pair only. This open/close mechanism is configured from a first swing link, second swing link and coupling link. The first swing link is driven by a rotation cylinder to perform a swinging motion. The second swing link is connected to a drive shaft and performs a swinging motion with the drive shaft as its axis. The first swing link and second swing link are coupled by the coupling link. When the rotation cylinder is driven, whereby the first swing link is caused to swing, the coupling link is vertically driven whereby the second swing link is caused to swing. As a result, a valve, connected to the second swing link, swings and the opening and closing operation of the flow path port is performed.