Patent US4442003A successfully refreshed from Google Patents.
US4442003A
Expired / Lapsed
US
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Filter assembly
Assignee: Illinois Tool Works Inc
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Filing: 1982-09-30
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Granted: 1984-04-10
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Expires: 2002-09-30
Abstract
Abstract A compact inline filter assembly particularly adapted for use in a liquid paint supply system for removing foreign particulate matter at a point upstream from a manual or automatic spray nozzle. The filter assembly comprises an integral tubular body member provided with female and male threaded connections at the ends thereof and a replaceable filter element comprising a tapered ferrule and an integral fine mesh screen removably seated within the body member and clamped in axially centered relationship by a threaded male connection engaged with the body member.
Inventors
- 👤 Earl R. Holt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:32
CPC Classifications
B; B05; B05B; B05B15/00; B01; B01D; B01D35/00; B01D35/02; B05B15/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
168 words
An inline filter assembly adapted for use in a paint spray supply system comprising an integral tubular body member formed with a throughbore having an annular tapered shoulder intermediate the upstream and downstream ends thereof, said body member formed with an internal thread in the downstream portion of said bore extending inwardly toward said tapered shoulder for threadably receiving a threaded male connection formed with a conically tapered seat at the end thereof, a removable filter element comprising an annular ferrule formed with a first annular conical sealing seat disposed in seated sealing relationship on said tapered shoulder and a second annular conical sealing seat disposed in seated sealing relationship on the conically tapered seat of the male connection and removably clamped therebetween, a thimble-shaped filter screen affixed to said ferrule adjacent to said first conical seat and projecting axially within said bore toward said upstream end, and means on the upstream end portion of said body member for connecting said filter assembly to a paint supply system.
Claim 2
Dependent Claim
168 words
An inline filter assembly adapted for use in a paint spray supply system comprising an integral tubular body member formed with a throughbore having an annular tapered shoulder intermediate the upstream and downstream ends thereof, said body member formed with an internal thread in the downstream portion of said bore extending inwardly toward said tapered shoulder for threadably receiving a threaded male connection formed with a conically tapered seat at the end thereof, a removable filter element comprising an annular ferrule formed with a first annular conical sealing seat disposed in seated sealing relationship on said tapered shoulder and a second annular conical sealing seat disposed in seated sealing relationship on the conically tapered seat of the male connection and removably clamped therebetween, a thimble-shaped filter screen affixed to said ferrule adjacent to said first conical seat and projecting axially within said bore toward said upstream end, and means on the upstream end portion of said body member for connecting said filter assembly to a paint supply system.
Claim 3
Dependent Claim
35 words
The filter assembly as defined in claim 1 wherein said tapered shoulder and said first annular conical seat are disposed at an angle of about 30 degrees from a plane perpendicular to the axes thereof.
Claim 4
Dependent Claim
31 words
The filter assembly as defined in claim 1 wherein said second annular conical seat is disposed at an angle of about 45 degrees from a plane perpendicular to the axis thereof.
Claim 5
Dependent Claim
34 words
The filter assembly as defined in claim 1 in which said ferrule further includes a tubular projection extending axially of said first annular conical seat for supporting said filter screen in overlying relationship therearound.
Claim 6
Dependent Claim
35 words
The filter assembly as defined in claim 1 in which said filter screen is of an integral wire mesh including a circular cylindrical portion integrally connected at its upstream end to a substantially hemispherical section.
Claim 7
Dependent Claim
21 words
The filter assembly as defined in claim 4 further including bonding means for securing said filter screen to said tubular projection.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-10 | 1987-10-10 | 1988-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-10 | 1991-10-10 | 1992-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-10 | 1995-10-10 | 1996-04-10 | $7700.00 | Window Closed / Lapsed |