Patent US4366057A successfully refreshed from Google Patents.
US4366057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil filter seal membrane
Assignee: Hydra-Tech Hydraulics Inc
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Filing: 1981-12-04
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Granted: 1982-12-28
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Expires: 2001-12-04
Abstract
Abstract In an axial flow filtering apparatus for filtering oil, having one or more filter elements of the wound tissue type, wherein the oil passes through the filter elements to a collection channel, and then to an outlet port, the improvement comprising a flexible, non-porous membrane, configured to be disposed in a sealing relationship about the circumference of the filter elements, and completely overlapping the collection channel, thereby preventing oil from entering the collection channel from the exterior of the filter elements.
Inventors
- 👤 Thomas K. Bridges
- 👤 Howard Nourse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:10
CPC Classifications
B; B01; B01D; B01D27/00; B01D27/04; B01D27/06; B01D27/07; B01D27/08; B01D27/14; B01D27/142; B01D27/144; B01D29/00; B01D29/01; B01D29/05; B01D29/07; B01D29/072; B01D29/073; B01D29/50; B01D29/52; B01D29/54
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
136 words
In an axial flow filtering apparatus for filtering fluids having a centrally located flow means, an outlet port for passage of filtered fluid from said flow means out of said apparatus, at least one filter element comprising wound layers of tissue, and a channel extending radially outward from said flow means wherein said fluid passes through said filter element to said channel where it is conducted to said flow means and then to said outlet port, the improvement comprising: a flexible, non-porous membrane configured to be disposed in a sealing relationship about the circumference of said filter element such that said membrane partially overlaps said filter element and completely overlaps said channel, thereby preventing said fluid from entering said channel from a point outside said filter element, without first passing through at least one filter element.
Claim 2
Dependent Claim
136 words
In an axial flow filtering apparatus for filtering fluids having a centrally located flow means, an outlet port for passage of filtered fluid from said flow means out of said apparatus, at least one filter element comprising wound layers of tissue, and a channel extending radially outward from said flow means wherein said fluid passes through said filter element to said channel where it is conducted to said flow means and then to said outlet port, the improvement comprising: a flexible, non-porous membrane configured to be disposed in a sealing relationship about the circumference of said filter element such that said membrane partially overlaps said filter element and completely overlaps said channel, thereby preventing said fluid from entering said channel from a point outside said filter element, without first passing through at least one filter element.
Claim 3
Dependent Claim
12 words
The apparatus of claim 1 wherein said membrane comprises an elastic material.
Claim 4
Dependent Claim
10 words
The apparatus of claim 1 wherein said membrane comprises neoprene.
Claim 5
Dependent Claim
20 words
The apparatus of claim 1 wherein said flow means comprises a cylindrical tube disposed along the axis of said apparatus.
Claim 6
Dependent Claim
22 words
The apparatus of claim 1 wherein said apparatus has two filter elements joined together in an end-to-end configuration, thereby defining said channel.
Claim 7
Dependent Claim
25 words
The apparatus of claim 5 wherein said membrane completely overlaps said channel and partially overlaps the ends of each said filter element adjacent said channel.
Claim 8
Dependent Claim
13 words
The apparatus of claim 5, further comprising opposed, porous plates defining said channel.
Claim 9
Dependent Claim
13 words
The apparatus of claim 7, further comprising a screen disposed between said plates.
Claim 10
Dependent Claim
14 words
The apparatus of claim 7, wherein said plates are embedded into said filter elements.
Claim 11
Dependent Claim
17 words
The apparatus of claim 7 further including means for retaining said plates in a spaced apart configuration.
Claim 12
Dependent Claim
18 words
The apparatus of claim 1 including a plate disposed between said membrane and said filter adjacent said channel.
Claim 13
Dependent Claim
14 words
The apparatus of claim 11 wherein a screen is disposed in said flow channel.
References Cited (Backward Citations)
US3887467A
Cited
US4017400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |