Unitary filter cartridge
USRE37163E · kind E · reissue
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1998 |
| Grant date | May 8, 2001 |
| Priority date | — |
| Expiry date | Mar 6, 2018 |
Classification
- Technology area (CPC —)General
Abstract
A filter cartridge according to the present invention is provided having a unitary structure with a pleat pack formed securely about an interior screen. Opposite ends of the pleat pack and interior screen are integrally formed within a bottom end cap and an upper sleeve. The bottom end cap is constructed to follow the couture of the pleat pack to minimize the collection of dust about the bottom perimeter thereof. The upper sleeve is formed of a flexible material which may be manually deformed to pass through an opening in a tube sheet which retains the filter cartridge. The top sleeve comprises a lower lip extending along the interior of the inner screen to securely engage the inner screen. The lower lip is formed integrally with a radially extending ledge which is formed with an upwardly projecting funnel shaped side wall. The side wall includes an inner grove at its upper end which extends about a perimeter of the top sleeve. A supporting ledge is formed upon the upper end of the side wall and projects radially outward about a perimeter of the filter cartridge. The supporting ledge need not be continuous, so long as it is capable of supporting the filter cartridge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.