US3256995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic strainer
Assignee: Zurn Industries LLC
•
Filing: 1963-07-05
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Granted: 1966-06-21
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Expires: 1983-07-05
Abstract
No abstract record available.
Inventors
- 👤 John H Schmid
- 👤 Ramon J Zentis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:13
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/01; B01D29/05; B01D29/07; B01D29/071; B01D29/11; B01D29/13; B01D29/23; B01D29/232; B01D29/62; B01D29/66; B01D29/68; B01D29/682; B01D29/688; B01D2201/00; B01D2201/28; B01D2201/287
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
A STRAINER COMPRISING A HOLLOW BODY HAVING AN INLET FOR FLUID AT ONE SIDE AND AN OUTLET FOR FLUID AT THE OPPOSITE SIDES, A SCREEN SHAPED IN THE GENERAL FORM OF A HOLLOW CYLINDER, SAID SCREEN INCLUDING AN OPENING ALONG THE LENGTH THEREOF DEFINED BY A PLANE PASSING THROUGH A CHORD OF SAID CYLINDER AND PARALLEL TO THE AXIS THEREOF, SAID SCREEN BEING DISPOSED BETWEEN SAID INLET AND SAID OUTLET WITH SAID OPENING IN SAID SCREEN IN ALIGNMENT WITH SAID INLET AND SAID OUTLET, A BACKWASH ARM HAVING A SLOT THEREIN WITH A SHOE MEMBER ON EACH SIDE OF SAID SLOT, MEANS TO SWING SAID ARM TO MOVE SAID SHOE MEMBERS OVER THE INSIDE OF SAID SCREEN FROM ONE SIDE OF SAID OPENING IN SAID SCREEN TO THE OTHER WITH SAID SHOE MEMBERS SEALING ENGAGING SAID SCREEN SLIDING THEREOVER AND DIRECTING FLUID FROM THE DOWNSTREAM SIDE OF SAID SCREEN THROUGH SAID SLOT, AND MEANS TO DRAIN SAID FLUID FROM SAID SLOT.
Claim 2
Dependent Claim
161 words
A STRAINER COMPRISING A HOLLOW BODY HAVING AN INLET FOR FLUID AT ONE SIDE AND AN OUTLET FOR FLUID AT THE OPPOSITE SIDES, A SCREEN SHAPED IN THE GENERAL FORM OF A HOLLOW CYLINDER, SAID SCREEN INCLUDING AN OPENING ALONG THE LENGTH THEREOF DEFINED BY A PLANE PASSING THROUGH A CHORD OF SAID CYLINDER AND PARALLEL TO THE AXIS THEREOF, SAID SCREEN BEING DISPOSED BETWEEN SAID INLET AND SAID OUTLET WITH SAID OPENING IN SAID SCREEN IN ALIGNMENT WITH SAID INLET AND SAID OUTLET, A BACKWASH ARM HAVING A SLOT THEREIN WITH A SHOE MEMBER ON EACH SIDE OF SAID SLOT, MEANS TO SWING SAID ARM TO MOVE SAID SHOE MEMBERS OVER THE INSIDE OF SAID SCREEN FROM ONE SIDE OF SAID OPENING IN SAID SCREEN TO THE OTHER WITH SAID SHOE MEMBERS SEALING ENGAGING SAID SCREEN SLIDING THEREOVER AND DIRECTING FLUID FROM THE DOWNSTREAM SIDE OF SAID SCREEN THROUGH SAID SLOT, AND MEANS TO DRAIN SAID FLUID FROM SAID SLOT.
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) | 1969-06-20 | 1969-12-20 | 1970-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-20 | 1973-12-20 | 1974-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-20 | 1977-12-20 | 1978-06-21 | $7700.00 | Window Closed / Lapsed |