Patent ID: 7731145
Filing Date: 2010-06-08
Classification: B66C,B66D

Abstract:
1. A method of displacing a flanged pipe manway cover secured by a plurality of fasteners to a manway portal flange, said method comprising the steps of: (a) removing at least one but less than all flange fasteners that secure said cover to a manway portal flange; (b) inserting a collet expanded fastener in at least one aperture in said portal flange vacated by said flange fastener removal, said collet fastener having a threaded shank projecting from an outside plane of said portal flange and away from said manway cover and with no structural portion of said fastener projecting past a sealing plane of said portal flange toward said manway cover; (c) penetrating a receptacle aperture in a load support appliance by said threaded shank to secure said appliance to said portal flange, said support appliance having a beam member projecting above said manway cover; (d) suspending an adjustable length force line device from said beam member; (e) attaching an adjustable length force line to said manway cover; (f) adjusting the length of said force line to transfer a substantial portion of manway cover weight onto said force line; (g) removing remaining flange fasteners to release said manway cover from said portal flange; and (h) controlling the displacement of said manway cover from said manway portal flange by controlling said adjustable length force line device.