Patent US3757951A successfully refreshed from Google Patents.
US3757951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid filter with clogging relief means
Assignee: Case LLC
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Filing: 1972-02-07
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Granted: 1973-09-11
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Expires: 1992-02-07
Abstract
Abstract A fluid filter with clogging release means and including a filter member for filtering foreign particles from the fluid flowing through the member. A chamber exists in the filter member for receiving the fluid and a fluid inlet connection is in fluid flow communication with the chamber for directing fluid into the chamber. A fluid by-pass passageway is in the fluid inlet connection, and the filter is yieldingly urged relative to the fluid inlet connection to cover and uncover the by-pass passageway in response to fluid pressure in the chamber in the filter. A spring urges the filter over the fluid connection and the by-pass therein, and a stop is provided for limiting the pressure the spring can exert on the filter member.
Inventors
- 👤 P Redenbarger
- 👤 A Khilnani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:51
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/14; B01D35/147
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
347 words
A fluid filter with clogging relief means, comprising a fluid inlet connection having a fluid outlet opening and a fluid bypass passageway, a fluid filter member for filtering of foreign particles from the fluid flowing through said filter member and having a chamber defined by an encircling wall for receiving the fluid to be filtered, said filter member being snugly telescopically disposed on said inlet connection and with its said wall covering said by-pass passageway to have fluid in said passageway normally blocked by said filter member from flowing out said passageway, a stop operatively associated with said filter member and being fully spaced from said by-pass passageway for limiting movement of said filter member over said by-pass passageway, a compression spring operatively associated with said filter member for yieldingly urging said filter member in the direction to block said passageway, said filter member being movably mounted for movement in the opposite direction and clear of said passageway under the influence of fluid pressure in said chamber for the flow of fluid through said passageway for bypassing said filter member when said fluid pressure in said chamber exceeds the force exerted by said spring, a threaded rod extending through said chamber and from said fluid inlet connection and in the direction beyond one end of said filter, a threaded member on said rod and disposed to force onto said spring for securing said filter member in place, a limit stop operative on said threaded member for limiting the force exertable by said spring onto said filter member, said fluid outlet opening existing in said end of said fluid inlet connection and with said fluid by-pass passageway existing in the side wall of said fluid inlet connection, and said filter member being telescoped on said fluid inlet connection and extending on said side wall and over said fluid bY-pass passageway and being movable in the direction of the longitudinal axis of said rod and relative to said fluid inlet connection to uncover said fluid bypass passageway when said filter member is moved against the influence of said spring.
Claim 2
Dependent Claim
347 words
A fluid filter with clogging relief means, comprising a fluid inlet connection having a fluid outlet opening and a fluid bypass passageway, a fluid filter member for filtering of foreign particles from the fluid flowing through said filter member and having a chamber defined by an encircling wall for receiving the fluid to be filtered, said filter member being snugly telescopically disposed on said inlet connection and with its said wall covering said by-pass passageway to have fluid in said passageway normally blocked by said filter member from flowing out said passageway, a stop operatively associated with said filter member and being fully spaced from said by-pass passageway for limiting movement of said filter member over said by-pass passageway, a compression spring operatively associated with said filter member for yieldingly urging said filter member in the direction to block said passageway, said filter member being movably mounted for movement in the opposite direction and clear of said passageway under the influence of fluid pressure in said chamber for the flow of fluid through said passageway for bypassing said filter member when said fluid pressure in said chamber exceeds the force exerted by said spring, a threaded rod extending through said chamber and from said fluid inlet connection and in the direction beyond one end of said filter, a threaded member on said rod and disposed to force onto said spring for securing said filter member in place, a limit stop operative on said threaded member for limiting the force exertable by said spring onto said filter member, said fluid outlet opening existing in said end of said fluid inlet connection and with said fluid by-pass passageway existing in the side wall of said fluid inlet connection, and said filter member being telescoped on said fluid inlet connection and extending on said side wall and over said fluid bY-pass passageway and being movable in the direction of the longitudinal axis of said rod and relative to said fluid inlet connection to uncover said fluid bypass passageway when said filter member is moved against the influence of said spring.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |