US3830368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid filter
Assignee: Individual
•
Filing: 1973-01-10
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Granted: 1974-08-20
•
Expires: 1993-01-10
Abstract
Abstract A liquid filter assembly having a filter element slidably mounted within a container for filtering impurities from liquids. The lower portion of the container below the filter element is of sufficient volume to permit condensation and separation of heavier liquid and solid impurities from the liquid before filtration. A normally closed bypass tube is movable by said filter element in response to a predetermined fluid pressure differential across said filter element resulting from the accumulation of impurities therein to a bypass position which permits liquid to bypass the clogged filter and be discharged from the filter assembly through the bypass tube and outlet pipe.
Inventors
- 👤 K Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:54
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/14; B01D35/147; B01D35/153
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
223 words
A liquid filter assembly comprising: a. a container having a side wall, a lower portion and an upper portion, b. inlet means for supplying liquid to the lower portion of the container, c. an outlet pipe extending vertically through said container for discharge of liquid from said container, said outlet pipe having at least one outlet hole in communication with the upper portion of said container, d. a bypass seat supported on said outlet pipe in fluid-tight relation, e. a bypass tube encompassing said outlet pipe in spaced relation to define an annular bypass passage between said outlet pipe and said bypass tube in communication with said outlet hole, f. means for normally biasing the lower end of said bypass tube against said bypass seat in fluid-tight relation, g. a filter element extending annularly between said bypass tube and said side wall for filtering liquid flowing upwardly from the lower portion to the upper portion of said container, and h. said filter element engaging the bypass tube whereby a predetermined fluid pressure differential across said filter element caused by the accumulation of impurities within said filter element will force said filter element upwardly to move said bypass tube off said bypass seat thereby permitting liquid to bypass said filter by flowing through said bypass passage and said outlet hole into said outlet pipe.
Claim 2
Dependent Claim
223 words
A liquid filter assembly comprising: a. a container having a side wall, a lower portion and an upper portion, b. inlet means for supplying liquid to the lower portion of the container, c. an outlet pipe extending vertically through said container for discharge of liquid from said container, said outlet pipe having at least one outlet hole in communication with the upper portion of said container, d. a bypass seat supported on said outlet pipe in fluid-tight relation, e. a bypass tube encompassing said outlet pipe in spaced relation to define an annular bypass passage between said outlet pipe and said bypass tube in communication with said outlet hole, f. means for normally biasing the lower end of said bypass tube against said bypass seat in fluid-tight relation, g. a filter element extending annularly between said bypass tube and said side wall for filtering liquid flowing upwardly from the lower portion to the upper portion of said container, and h. said filter element engaging the bypass tube whereby a predetermined fluid pressure differential across said filter element caused by the accumulation of impurities within said filter element will force said filter element upwardly to move said bypass tube off said bypass seat thereby permitting liquid to bypass said filter by flowing through said bypass passage and said outlet hole into said outlet pipe.
Claim 3
Dependent Claim
48 words
The filter assembly of claim 1 wherein the inlet means includes means for transversely dispersing the incoming liquid into the lower portion of the container to facilitate condensation and settling of impurities from the liquid within said lower portion before passage of said liquid through the filter element.
Claim 4
Dependent Claim
26 words
The filter assembly of claim 1 wherein the inlet means includes check means for preventing liquid from back-flowing out of the container through said inlet means.
Claim 5
Dependent Claim
67 words
The filter assembly of claim 1 wherein the filter element is supported in the desired position within the container by a lower perforated plate, and wherein the means for biasing said bypass tube includes an upper perforated plate which engages the upper end of said tube and the upper end of said filter element, and a compression spring which is compressed downwardly against said upper perforated plate.
Claim 6
Dependent Claim
54 words
The filter assembly of claim 4 wherein thE outlet pipe extends through the lower end of the container in fluid-tight relation to discharge liquid therethrough, and wherein a cover is removably secured to the side wall of the container in fluid-tight relation by fastener means secured to the upper end of said outlet pipe.
Claim 7
Dependent Claim
55 words
The filter assembly of claim 1 wherein at least a portion of the container side wall is transparent to permit inspection of the interior of the container during operation, and wherein drain means depend from the lower end of the container to permit removal of impurities which have settled to the bottom of the container.
Claim 8
Dependent Claim
209 words
A liquid filter assembly comprising: a. a container, b. inlet means for supplying liquid to be filtered to said container, c. an outlet pipe extending vertically through said container for discharge of liquid from said container, said outlet pipe having at least one outlet hole, d. a filter element slidably engaged within said container for filtering liquid flowing from said inlet means to the outlet hole of said outlet pipe, e. a bypass tube engaging said filter element and encompassing said outlet pipe to define a bypass passage between said outlet pipe and said bypass tube in communication with said outlet hole, f. bypass seat means mounted on said outlet pipe for receiving the lower end of said bypass tube in fluid-tight relation, g. means for biasing said bypass tube toward a normal position wherein said bypass tube is engaged against said bypass seat, and for permitting said bypass tube to disengage from said bypass seat to allow liquid to bypass the filter element through said bypass passage and said outlet hole when liquid flow through said filter element is restricted by the accumulation of impurities within the filter element causing the fluid pressure differential on opposite sides of said filter element to be increased above a predetermined level.
Claim 9
Dependent Claim
209 words
A liquid filter assembly comprising: a. a container, b. inlet means for supplying liquid to be filtered to said container, c. an outlet pipe extending vertically through said container for discharge of liquid from said container, said outlet pipe having at least one outlet hole, d. a filter element slidably engaged within said container for filtering liquid flowing from said inlet means to the outlet hole of said outlet pipe, e. a bypass tube engaging said filter element and encompassing said outlet pipe to define a bypass passage between said outlet pipe and said bypass tube in communication with said outlet hole, f. bypass seat means mounted on said outlet pipe for receiving the lower end of said bypass tube in fluid-tight relation, g. means for biasing said bypass tube toward a normal position wherein said bypass tube is engaged against said bypass seat, and for permitting said bypass tube to disengage from said bypass seat to allow liquid to bypass the filter element through said bypass passage and said outlet hole when liquid flow through said filter element is restricted by the accumulation of impurities within the filter element causing the fluid pressure differential on opposite sides of said filter element to be increased above a predetermined level.
Claim 10
Dependent Claim
84 words
The filter assembly of claim 7 wherein the biasing means includes a perforated pressure plate extending transversely across the interior of the container in engagement with the upper ends of the bypass tube and the filter element, and a compression spring engaged against the upper surface of said pressure plate, said spring applying a downward force against said pressure plate substantially equal to the upward force exerted on said filter element when the fluid pressure differential across said filter element reaches said predetermined level.
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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) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |