Method of installing a shoe seal for floating roof of storage tank
US5321881A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 1993 |
| Grant date | Jun 21, 1994 |
| Priority date | — |
| Expiry date | Sep 27, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49952
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A shoe seal for sealing the space between a floating roof and the inner wall of an oil storage tank includes a plurality of scissors hanger assemblies for mounting a shoe on the floating roof. Each assembly includes an elongated plate suspended from a shoe clip bolted to the shoe and pivotally coupled to an opposite pair of elongated bars suspended from a rim clip bolted to the outer rim of the floating roof. In a first embodiment, the shoe is biased into contact with the inner tank wall by pusher bars bolted to the shoe and having resilient legs extending into contact with the floating roof, and pusher plates bolted to the roof and having a resilient leg extending into contact with the shoe. In a second embodiment, only the pusher bars are used and they are mounted on the rim clips bolted to the floating roof so that the opposite resilient legs thereof extend into contact with the shoe. A vapor barrier fabric extends between and is joined to the shoe and to the floating roof to complete the shoe seal. After lowering the shoe and attached scissors hanger assemblies into place between the inner tank wall and the floating roof, holes are drilled in the floating roof for bolting of th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.