US4218324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter element having removable filter media member
Assignee: PTI Technologies Inc
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Filing: 1979-05-03
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Granted: 1980-08-19
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Expires: 1999-05-03
Abstract
Abstract A metallic filter element constructed of stainless steel. The filter element includes a tubular metal support member having a tubular filter media member slipped over the support member. When the filter element becomes clogged and is ready for cleaning or becomes damaged and is ready for replacement, the filter media member may be easily removed by merely slipping it off the tubular metal support member and replacing it with a new or cleaned filter media member.
Inventors
- 👤 Wilhelm U. Hartmann
- 👤 Larry C. Augustine
- 👤 Daniel J. Ryan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:02
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/13; B01D29/15; B01D29/21; B01D29/96
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
118 words
A stainless steel metallic filter element for filtering corrosive materials at relatively high pressures which element may be readily disassembled for cleaning and replacement of component parts thereof comprising: (A) a perforated tubular metal support member having one end closed; (B) a fitting having a body and a radially outwardly extending flange permanently attached to the other end of said support member; (C) a tubular pleated filter media member formed of stainless steel metallic material slipped over and extending along the length of said support member and in close contact therewith but with no physical retention means between said one diameter and said support member; and (D) means for removably sealing said media member to said support member.
Claim 2
Dependent Claim
118 words
A stainless steel metallic filter element for filtering corrosive materials at relatively high pressures which element may be readily disassembled for cleaning and replacement of component parts thereof comprising: (A) a perforated tubular metal support member having one end closed; (B) a fitting having a body and a radially outwardly extending flange permanently attached to the other end of said support member; (C) a tubular pleated filter media member formed of stainless steel metallic material slipped over and extending along the length of said support member and in close contact therewith but with no physical retention means between said one diameter and said support member; and (D) means for removably sealing said media member to said support member.
Claim 3
Dependent Claim
21 words
A metallic filter element as defined in claim 1 wherein said filter media member is freely floating upon said support member.
Claim 4
Dependent Claim
20 words
A metallic filter element as defined in claim 2 wherein said filter media member has one end thereof permanently closed.
Claim 5
Dependent Claim
26 words
A metallic filter element as defined in claim 3 wherein said closed end is formed by an end cap permanently secured to said filter media member.
Claim 6
Dependent Claim
21 words
A metallic filter element as defined in claim 4 wherein said end cap includes a centrally disposed outwardly extending hollow boss.
Claim 7
Dependent Claim
28 words
A metallic filter element as defined in claim 5 wherein said closed end of said support member includes an outwardly extending protrusion for insertion into said hollow boss.
Claim 8
Dependent Claim
28 words
A metallic filter element as defined in claim 3 wherein the opposite end of said filter media member includes a ring shaped solid metal band permanently secured thereto.
Claim 9
Dependent Claim
33 words
A metallic filter element as defined in claim 7 wherein said metal band has an outer surface defining areas for receiving tools to assist in removing said media member from said support member.
Claim 10
Dependent Claim
51 words
A metallic filter member as defined in claim 1 wherein said means for sealing includes a ring shaped solid metal band permanently secured to one end of said filter media member and defining a sealing surface, said sealing surface engaging a sealing ring disposed between said sealing surface and said fitting.
Claim 11
Dependent Claim
17 words
A metallic filter element as defined in claim 9 wherein said sealing ring is an "O" ring.
Claim 12
Dependent Claim
21 words
A metallic filter element as defined in claim 9 wherein said sealing ring is an "O" ring disposed in said body.
Claim 13
Dependent Claim
17 words
A metallic filter element as defined in claim 9 wherein said sealing ring is a metal member.
Claim 14
Dependent Claim
25 words
A metallic filter element as defined in claim 12 wherein said metal member is a Belleville washer disposed between said sealing surface and said flange.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-19 | 1984-02-18 | 1984-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-19 | 1988-02-18 | 1988-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-19 | 1992-02-18 | 1992-08-19 | $7700.00 | Window Closed / Lapsed |