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. 20, 2001
Filed:
Jul. 30, 1998
Per Vatne, Rabbersvik, NO;
Maritime Hydraulics AS, Kristiansand, NO;
Abstract
A mounting apparatus for a piston-cylinder arrangement (,) in a derrick (,) placed on a drill floor (,), which hydraulic piston-cylinder arrangement (,) is adapted to raise and lower a yoke (,) which travels on guide rails (,) in the derrick (,) itself, where the cylinder (,) is firmly held by a mounting apparatus (,) in relation to the drill floor (,). For the changing of gaskets (,) on the piston (,) and the cylinder (,), the cylinder is arranged so as to be lowerable in relation to the mounting thereof. The mounting apparatus (,) is designed to be releasable and comprises a flange (,) permanently mounted on the cylinder (,), a fixing device (,) in fixed position in relation to drill floor (,), a dividable locking ring (,), and a locking device (,) and the fixing device (,) and being firmly held in engagement with the aid of the locking device (,). A method of changing gaskets on a piston and cylinder is also described.