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. 15, 1986
Filed:
Oct. 12, 1984
Howard A Mayo, Jr, York, PA (US);
Allis-Chalmers Corporation, Milwaukee, WI (US);
Abstract
An adjustable draft tube is disclosed for a hydraulic turbine installation. The draft tube includes a pair of fabricated box piers which are positioned in a tailwater with the turbine outlet disposed between the piers. The piers are anchored to a tailwater floor and a powerhouse foundation wall. A roof is provided extending between opposing surfaces of the piers with an edge of the roof pivotally secured to the piers above the turbine outlet. The roof is pivotable between a first position with a downstream edge of the roof disposed beneath a predetermined low tailwater elevation and a second position with the downstream edge disposed between the low tailwater elevation and a predetermined high tailwater elevation.