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:
Jul. 19, 1977
Filed:
Aug. 18, 1975
Thomas Wheatley, Houston, TX (US);
Other;
Abstract
This disclosure is directed to a full opening check valve for use in a pipeline. The apparatus incorporates a funnel shaped body which is welded to a pipe in the pipeline. The body encloses a chamber and an axial half circle guide extends thereacross and along part of the chamber to serve as a guide for pipeline pigs passing through this device. The funnel shaped body is welded to an end plate. The end plate has a slightly recessed circular shoulder on the inside. The circular shoulder sealingly receives a valve element. The valve element is constructed of a flat plate member and is hung from above on a straight barlike member serving as a hinge. The hinge extends from the end plate at the side. This enables the hinge rod to be connected to a damper or crank mechanism for controlled rotation. The end plate welds to a second pipe. This device is conveniently connected in the pipeline by welding to the connected pipes as mentioned above and provides a full opening to enable it to pass a pipeline pig, for example, having the diameter of the pipe.