US3243045A
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Assignee: Walker Manufacturing Co
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Filing: 1963-07-05
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Granted: 1966-03-29
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Expires: 1983-07-05
Abstract
No abstract record available.
Inventors
- 👤 La Vern R Tietz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:28
CPC Classifications
B; B01; B01D; B01D27/00; B01D27/02; B01D27/10; B01D27/103; B01D27/106
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
183 words
A FILTER ELEMENT COMPRISING A HOUSING, A FILTER BODY SUPPORTED IN SAID HOUSING, A PLATE CLOSING ONE END OF SAID HOUSING, SAID PLATE HAVING A CENTRALLY LOCATED OUTLET OPENING, INLET MEANS IN SAID PLATE POSITIONED RADIALLY OUTWARDLY OF SAID OUTLET OPENING, A CHECK VALVE POSITIONED ADJACENT SAID PLATE AND ADAPTED TO COVER SAID INLET MEANS TO PREVENT BACK FLOW THERETHROUGH, A TUBULAR MEMBER, ONE END OF SAID TUBULAR MEMBER ENGAGING SAID CHECK VALVE AROUND SAID OUTLET OPENING FOR HOLDING SAID CHECK VALVE IN POSITION WITH RESPECT TO SAID PLATE, THE OTHER END OF SAID TUBULAR MEMBER ENGAGING SAID FILTER BODY FOR SPACING SAID FILTER BODY FROM SAID PLATE AND SUPPORTING SAID BODY UPON SAID PLATE, APERTURE MEANS SPACED RADIALLY FROM THE AXIS OF SAID OUTLET OPENING FOR ADMITTING FLUID TO THE INSIDE OF SAID TUBULAR MEMBER FOR BYPASSING SAID FILTER BODY, A VALVE SLIDABLY CAGED INSIDE OF SAID TUBULAR MEMBER AND ADAPTED TO ENGAGE SAID APERTURE MEANS FOR CONTROLLING THE FLOW THERETHROUGH, AND RESILIENT MEANS CAGED INSIDE OF SAID TUBULAR MEMBER AND ENGAGING SAID VALVE FOR CONTROLLING THE OPENING PRESSURE OF SAID VALVE.
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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |