Patent ID: 8695946
Filing Date: 2014-04-15
Classification: B66C,B66D,G21C,Y02E,Y10T

Abstract:
1. An apparatus for providing a replaceable suspension assembly in an inverted well, the interior of the inverted well being accessible from its bottom after initial construction thereof, comprising: a receptacle defining therethrough a central bore and a pair of opposed slots extending from the central bore, and having a support surface surrounding in part the central bore and slots, the receptacle being fixedly attached at the to of the inverted well with the support surface in a substantially horizontal orientation and the central bore and slots in a substantially vertical orientation; a stud assembly comprising a vertically oriented stud and an engagement pin extending orthogonally to the stud, wherein the stud is removably inserted into the central bore and raised such that the pin passes through the slots, and further wherein the stud is then rotated such that the pin rests on the support surface to support the stud in the receptacle, and the stud is raised and rotated so that the pin aligns with the slots and the stud is lowered to remove the stud from the receptacle; and a pulley assembly attached to and below the stud assembly, the pulley assembly comprising a pulley and an axle on which the pulley is mounted, the axle being spaced apart from and substantially orthogonal to the stud, wherein the pulley assembly is mounted in and removed from the interior of the well from its bottom by engaging and disengaging the stud from the receptacle.