US3681899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separable filter housing and cartridge for a fluid flow line
Assignee: BEACH FILTER PRODUCTS Inc
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Filing: 1970-07-09
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Granted: 1972-08-08
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Expires: 1990-07-09
Abstract
Abstract A filter unit for use in filtering fluids and especially gases including compressed air to remove contaminants therefrom and comprising a pair of similar transparent cup-shaped housing members defining a cylindrical cavity which receives a filter cartridge filled with pulverent filter material enclosed in a sheath formed from porous textile material.
Inventors
- 👤 George A Grote
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:59
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
298 words
A filter unit for gaseous material comprising in combination, a housing comprising a pair of cup-shaped housing members and each having cylindrical interior wall surfaces of similar length and uniform diameter, one member having external threads thereon adjacent the open end thereof and the other member having an enlargement at the open end thereof extending outwardly from the interior cylindrical surface thereof and provided with internal threads complementary to the external threads on said one member, whereby the interior wall surfaces of said members when said members are connected defines an elongated cylindrical cavity of uniform diameter extending between the opposite ends of said housing, a gasket positioned between abutting end portions of said members when connected together, the opposite end of each of said members being constricted to form seats and also having an axial opening therethrough of a diameter substantially less than the cylindrical interior wall surfaces, means on said opposite ends of said members operable to be connected to conduit means to feed and discharge gaseous material to and from said housing, perforated discs abutting said seats in said constricted ends, and a cylindrical filter cartridge within said cavity in said members when connected together and having a flexible textile sidewall member slightly larger in diameter than said cavity and also being slightly longer than the distance between said perforated discs, said cartridge being filled with pulverent filter material and the ends of said cartridge being porous and abutting said discs, said discs being sufficiently rigid to at least slightly compress said filter cartridge axially to force said sidewall member into substantially continuous circumferential engagement with the inner cylindrical cavity wall within said housing members when said members are fully connected to prevent by-passing of gaseous material between said cavity wall and said filter cartridge.
Claim 2
Dependent Claim
298 words
A filter unit for gaseous material comprising in combination, a housing comprising a pair of cup-shaped housing members and each having cylindrical interior wall surfaces of similar length and uniform diameter, one member having external threads thereon adjacent the open end thereof and the other member having an enlargement at the open end thereof extending outwardly from the interior cylindrical surface thereof and provided with internal threads complementary to the external threads on said one member, whereby the interior wall surfaces of said members when said members are connected defines an elongated cylindrical cavity of uniform diameter extending between the opposite ends of said housing, a gasket positioned between abutting end portions of said members when connected together, the opposite end of each of said members being constricted to form seats and also having an axial opening therethrough of a diameter substantially less than the cylindrical interior wall surfaces, means on said opposite ends of said members operable to be connected to conduit means to feed and discharge gaseous material to and from said housing, perforated discs abutting said seats in said constricted ends, and a cylindrical filter cartridge within said cavity in said members when connected together and having a flexible textile sidewall member slightly larger in diameter than said cavity and also being slightly longer than the distance between said perforated discs, said cartridge being filled with pulverent filter material and the ends of said cartridge being porous and abutting said discs, said discs being sufficiently rigid to at least slightly compress said filter cartridge axially to force said sidewall member into substantially continuous circumferential engagement with the inner cylindrical cavity wall within said housing members when said members are fully connected to prevent by-passing of gaseous material between said cavity wall and said filter cartridge.
Claim 3
Dependent Claim
32 words
The filter unit according to claim 1 in which said housing members are molded from transparent synthetic resin of a rigid type when cured to provide a cylindrical cavity of stable dimensions.
Claim 4
Dependent Claim
38 words
The filter unit according to claim 1 in which said housing members are molded from a polycarbonate resin to render said filter unit substantially non-reactive to a wide range of gases capable of being filtered by said unit.
Claim 5
Dependent Claim
26 words
The filter unit according to claim 1 in which one of said housing members has supporting means integrally formed thereon for attachment to a supporting surface.
Claim 6
Dependent Claim
27 words
The filter unit according to claim 1 in which said filter cartridge is provided with a bat of cotton extending across the inlet end of said cartridge.
Claim 7
Dependent Claim
101 words
The filter unit according to claim 1 in which said filter cartridge has sidewalls comprising a seamless cylindrical sleeve and end discs formed from porous textile material and filled with pulverent filter material, said end discs being secured respectively to the opposite ends of said sleeve by stitching, one of said ends having a seam formed by said stitching extending into the interior of said cartridge and the other end having a seam formed by said sTitching extending outwardly and the outer end of said seam being turned upon itself and additionally stitched to stabilize said other end of said cartridge.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |