Shoe seal for floating roof of storage tank, and method of installing same
US5103992A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1991 |
| Grant date | Apr 14, 1992 |
| Priority date | — |
| Expiry date | Sep 19, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D88/46
- 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 movably mounting a shoe on the floating roof. Each scissors hanger 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 resiliently 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. The shoe seal may be installed in a tank in service, inasmuch as no welding is needed. After lowering the shoe and attached scissors hanger assemb…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.