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:
Mar. 18, 1997
Filed:
Aug. 04, 1994
Edward J Hyp, Irwin, PA (US);
Westinghouse Electric Corporation, Pittsburgh, PA (US);
Abstract
An apparatus for positioning a search device and a retrieval device in a steam generator includes a guide mechanism for guiding the devices through the annulus to the tube sheet and drive mechanisms for driving the cables of the devices. Alternatively, a plurality of guide mechanisms and a plurality of drive mechanisms may be provided for a plurality of search and retrieval devices. The guide mechanism may include two double-dog-leg, single-piece, guide tubes between the handhole and the tube sheet for guiding the cables. The drive mechanisms may each include a pair of pinch rollers for driving a corresponding cable, a remote energizing mechanism for independently energizing the corresponding drive mechanism, and a reversible motor having a drive shaft. One pinch roller is driven by one drive shaft and the other pinch roller freely rotates about the other drive shaft. The guide mechanism may also include a guide plate mounted to the handhole and dual sets of guide tubes for the two halves of the tube sheet. The apparatus may further include a selection mechanism for selecting either half of the tube sheet for positioning the devices thereon. The selection mechanism may include a moving mechanism for moving the drive mechanisms between the halves of the guide plate. The moving mechanism may include a handle mechanism for rotating the drive mechanisms between the halves. A pivot mechanism may be fixedly attached to a holding mechanism, which holds the plurality of drive mechanisms, in order to pivot the holding mechanism about the guide plate.