US4340470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid filter
Assignee: Individual
•
Filing: 1981-01-05
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Granted: 1982-07-20
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Expires: 2001-01-05
Abstract
Abstract Filters, particularly relative small filters, usually include a screening element which readily clogs or becomes partially blocked with material thus impeding the flow of liquid therethrough. The present invention comprises a cylindrical filter housing or bowl portion bisected by a vertically situated screen element situated at an angle to the direction of flow so that the flow of fluid tends to wash the screen and deposit the sediment at the base of the housing. Preferably the housing is formed of clear plastic or glass so that the screen condition can be viewed. The base of the screen element is angulated and lies on the base of the housing upon the inlet side thereof so that when removing the screen for cleaning, any sediment may be lifted clear of the housing as the screen is removed.
Inventors
- 👤 John D. Van Mol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:21
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/02; B01D29/00; B01D29/01; B01D29/88; B01D29/90; B01D29/904; B01D29/94; B01D29/945; B01D29/96
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
257 words
A filter assembly for liquids comprising in combination a cylindrical housing including a cylindrical body portion having open upper and lower ends, caps screw threadably engageable upon each of said ends, for detachably closing said ends, an inlet and an outlet formed through the wall of said body portion substantially diametrically opposite one another and spaced above the lower end cap thereof, a removable screening element within said housing dividing said housing into an inlet portion and an outlet portion with said inlet communicating with said inlet portion and said outlet communicating with said outlet portion, said screening element being situated vertically within said housing and extending between said end caps, said screening element including a vertical portion and a base portion situated at right angles to said vertical portion and extending from the lower end of said vertical portion, said base portion covering substantially entirely the portion of the lower end cap within said inlet portion of said housing to collect and retain sediment thereon, means within said housing extending from the wall of said body portion and engageable by said screening element, for positioning said screening element within said housing, at an inclined angle less than 90° from the direction of flow of said liquid through said housing, said means for positioning said screening element including lug means on the inner wall of said housing engageable by the vertical side edges of said screening element to locate said element in the desired angular relationship relative to the direction of flow of liquid through said housing.
Claim 2
Dependent Claim
257 words
A filter assembly for liquids comprising in combination a cylindrical housing including a cylindrical body portion having open upper and lower ends, caps screw threadably engageable upon each of said ends, for detachably closing said ends, an inlet and an outlet formed through the wall of said body portion substantially diametrically opposite one another and spaced above the lower end cap thereof, a removable screening element within said housing dividing said housing into an inlet portion and an outlet portion with said inlet communicating with said inlet portion and said outlet communicating with said outlet portion, said screening element being situated vertically within said housing and extending between said end caps, said screening element including a vertical portion and a base portion situated at right angles to said vertical portion and extending from the lower end of said vertical portion, said base portion covering substantially entirely the portion of the lower end cap within said inlet portion of said housing to collect and retain sediment thereon, means within said housing extending from the wall of said body portion and engageable by said screening element, for positioning said screening element within said housing, at an inclined angle less than 90° from the direction of flow of said liquid through said housing, said means for positioning said screening element including lug means on the inner wall of said housing engageable by the vertical side edges of said screening element to locate said element in the desired angular relationship relative to the direction of flow of liquid through said housing.
Claim 3
Dependent Claim
13 words
The invention according to claim 1 in which said body portion is transparent.
References Cited (Backward Citations)
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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) | 1985-07-19 | 1986-01-18 | 1986-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-19 | 1990-01-18 | 1990-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-19 | 1994-01-18 | 1994-07-20 | $7700.00 | Window Closed / Lapsed |