US4442004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biasing arrangement and filter unit for a filtering apparatus
Assignee: Veolia WTS Solutions USA Inc
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Filing: 1982-07-01
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Granted: 1984-04-10
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Expires: 2002-07-01
Abstract
Abstract The present invention relates to a biasing arrangement for use with a filter element having a longitudinal bore therethrough. The biasing arrangement includes a spring element having first and second ends and being comprised of a plastic material. The spring element is deformable by pressure applied in the direction generally along an axis extending between the first and second ends. A sealing disk is adapted to seal an end of the longitudinal bore of the filter element. The sealing disk is also comprised of a plastic material and is positively secured to an end of the spring element. According to a further aspect of the present invention, the sealing disk is positively secured to an end of the filter element to define an integral filter unit. In the preferred embodiment, the spring element, the sealing disk, and the filter element are all comprised of compatible plastic materials. In accordance with a further aspect of the present invention, the spring element has a non-linear load/deflection characteristic such that a large force is obtained during initial deflection followed by a substantially constant force upon further deflection.
Inventors
- 👤 Zan P. Smith
- 👤 Frank Haimbach, IV
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:28
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D29/114; B01D29/50; B01D29/52; B01D2201/00; B01D2201/04; B01D2201/043; B01D2201/0438
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
99 words
A biasing arrangement for use with a filter element having a longitudinal bore therethrough, the biasing arrangement comprising a spring element having first and second ends, said spring element being comprised entirely of a plastic material and being deformable by pressure applied in a direction generally along an axis extending between said first and second ends, a generally planar sealing disk adapted to seal an end of the longitudinal bore of the filter element, said sealing disk being comprised entirely of a plastic material, and said sealing disk being permaently positively secured to an end of said spring element.
Claim 2
Dependent Claim
99 words
A biasing arrangement for use with a filter element having a longitudinal bore therethrough, the biasing arrangement comprising a spring element having first and second ends, said spring element being comprised entirely of a plastic material and being deformable by pressure applied in a direction generally along an axis extending between said first and second ends, a generally planar sealing disk adapted to seal an end of the longitudinal bore of the filter element, said sealing disk being comprised entirely of a plastic material, and said sealing disk being permaently positively secured to an end of said spring element.
Claim 3
Dependent Claim
25 words
The biasing arrangement according to claim 1, wherein the plastic material of said spring element and the plastic material of said sealing disk are compatible.
Claim 4
Dependent Claim
22 words
The biasing arrangement according to claim 2, wherein the plastic material of both said spring element and said sealing disk is polypropylene.
Claim 5
Dependent Claim
34 words
The biasing arrangement according to claim 1 or 2, wherein said sealing disk is positively secured to said end of the spring element by spin welding, fusion welding, hot melt welding or ultrasonic welding.
Claim 6
Dependent Claim
23 words
The biasing arrangement according to claim 1 or 2, wherein the spring element and the sealing disk are molded as a single unit.
Claim 7
Dependent Claim
25 words
The biasing arrangement according to claim 1, wherein said disk is positively secured to an end of the filter element to seal the longitudinal bore.
Claim 8
Dependent Claim
16 words
The biasing arrangement according to claim 1, wherein said spring element has a non-linear load/deflection characteristic.
Claim 9
Dependent Claim
24 words
The biasing arrangement according to claim 7, wherein the spring element develops a large force during initial deflection followed by a substantially constant force.
Claim 10
Dependent Claim
20 words
The biasing arrangement according to claim 8, wherein said spring element attains substantially the same constant force upon repeated loadings.
Claim 11
Dependent Claim
30 words
The biasing arrangement according to claim 1, wherein the spring element includes a plurality of annular rings interconnected by angled ribs extending along the longitudinal axis of the spring element.
Claim 12
Dependent Claim
133 words
A filter unit for use in a filtering apparatus employing at least one filter unit, said filter unit comprising an elongated filter element including filtering material and having a longitudinal bore therethrough, a spring element having first and second ends, said spring element being deformable by a pressure applied in a direction generally along an axis extending between said first and second ends, a sealing disk for sealing an end of the longitudinal bore of the filter element, said sealing disk being positively directly secured to both an end of said spring element and an end of said filtering material such that said spring element, said sealing disk and said filter element define an integral unit, said spring element, said sealing disk and said filtering material each being comprised of a plastic material.
Claim 13
Dependent Claim
133 words
A filter unit for use in a filtering apparatus employing at least one filter unit, said filter unit comprising an elongated filter element including filtering material and having a longitudinal bore therethrough, a spring element having first and second ends, said spring element being deformable by a pressure applied in a direction generally along an axis extending between said first and second ends, a sealing disk for sealing an end of the longitudinal bore of the filter element, said sealing disk being positively directly secured to both an end of said spring element and an end of said filtering material such that said spring element, said sealing disk and said filter element define an integral unit, said spring element, said sealing disk and said filtering material each being comprised of a plastic material.
Claim 14
Dependent Claim
21 words
The filter unit according to claim 11, wherein said spring element and said sealing disk are comprised of compatible plastic materials.
Claim 15
Dependent Claim
24 words
The filter unit according to claim 11, wherein said spring element, said sealing disk and said filter element are comprised of compatible plastic materials.
Claim 16
Dependent Claim
31 words
The filter unit according to claim 11 or 12, wherein said sealing disk is positively secured to said spring element by spin welding, fusion welding, hot melt welding or ultrasonic welding.
Claim 17
Dependent Claim
22 words
The filter unit according to claim 11 or 12, wherein said sealing disk and said spring element comprise a single molded unit.
Claim 18
Dependent Claim
31 words
The filter unit according to claim 11 or 13, wherein said filter element is positively secured to said sealing disk by spin welding, fusion welding, hot melt welding or ultrasonic welding.
Claim 19
Dependent Claim
15 words
The filter unit according to claim 12 or 13, wherein the plastic material is polypropylene.
Claim 20
Dependent Claim
16 words
The filter unit according to claim 11, wherein said spring element has a non-linear load/deflection characteristic.
Claim 21
Dependent Claim
24 words
The filter unit according to claim 18, wherein the spring element develops a large force during initial deflection followed by a substantially constant force.
Claim 22
Dependent Claim
20 words
The filter unit according to claim 19, wherein said spring element attains substantially the same constant force upon repeated loadings.
Claim 23
Dependent Claim
106 words
A biasing arrangement for use with a filter element having a longitudinal bore therethrough, the biasing arrangement comprising a spring element having first and second ends, said spring element being deformable by pressure applied in a direction generally along an axis extending between said first and second ends, a sealing disk adapted to seal an end of the longitudinal bore of the filter element, said sealing disk being positively secured to an end of said spring element, and said spring element having a non-linear load/deflection characteristic, said non-linear characteristic developing a large force upon initial deflection of the spring element followed by a substantially constant force.
Claim 24
Dependent Claim
106 words
A biasing arrangement for use with a filter element having a longitudinal bore therethrough, the biasing arrangement comprising a spring element having first and second ends, said spring element being deformable by pressure applied in a direction generally along an axis extending between said first and second ends, a sealing disk adapted to seal an end of the longitudinal bore of the filter element, said sealing disk being positively secured to an end of said spring element, and said spring element having a non-linear load/deflection characteristic, said non-linear characteristic developing a large force upon initial deflection of the spring element followed by a substantially constant force.
Claim 25
Dependent Claim
21 words
The biasing arrangement according to claim 21, wherein said spring element and said sealing disk are comprised of compatible plastic materials.
Claim 26
Dependent Claim
20 words
The filter unit according to claim 21, wherein said spring element attains substantially the same constant force upon repeated loadings.
References Cited (Backward Citations)
US2572981A
Cited
US3118836A
Cited
US3223241A
Cited
US3275144A
Cited
US3447687A
Cited
US3615016A
Cited
US3556300A
Cited
US3653512A
Cited
GB1444800A
Cited
US4048071A
Cited
US4035300A
Cited
US4042508A
Cited
US4293414A
Cited
US4174282A
Cited
US4248714A
Cited
US4235427A
Cited
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 |