US3073350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant fluid flow device
Assignee: American Radiator and Standard Sanitary Corp
•
Filing: 1957-12-20
•
Granted: 1963-01-15
•
Expires: 1977-12-20
Abstract
No abstract record available.
Inventors
- 👤 Earnest J Dillman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:55
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/01; G05D7/0126; G05D7/0133; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7869; Y10T137/7904; Y10T137/7922; Y10T137/7923
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN A CONSTANT FLUID FLOW DEVICE, COMPRISING A BODY DEFINING A FLOW PASSAGE HAVING AN INLET AND AN OUTLET, SAID FLOW PASSAGE PROGRESSIVELY DECREASING IN CROSS SECTIONAL AREA FROM SAID INLET TO SAID OUTLET, A CYLINDRICAL PLUNGER OF A DIAMETER LESS THAN THE MINIMUM DIAMETER OF SAID PASSAGE AND POSITIONED IN AXIAL ALIGNMENT WITHIN SAID PASSAGE FOR AXIAL MOVEMENT IN SAID PASSAGE, MEANS SUPPORTING SAID PLUNGER ON THE UPSTREAM SIDE FOR SAID AXIAL MOVEMENT INTO SAID PASSAGE, MEANS NORMALLY BIASING SAID PLUNGER TO A REST POSITION AT THE INLET OF SAID PASSAGE, AND SAID PASSAGE DECREASING IN CROSS SECTIONAL AREA IN ACCORDANCE WITH THE FORMULA
Claim 2
Dependent Claim
105 words
IN A CONSTANT FLUID FLOW DEVICE, COMPRISING A BODY DEFINING A FLOW PASSAGE HAVING AN INLET AND AN OUTLET, SAID FLOW PASSAGE PROGRESSIVELY DECREASING IN CROSS SECTIONAL AREA FROM SAID INLET TO SAID OUTLET, A CYLINDRICAL PLUNGER OF A DIAMETER LESS THAN THE MINIMUM DIAMETER OF SAID PASSAGE AND POSITIONED IN AXIAL ALIGNMENT WITHIN SAID PASSAGE FOR AXIAL MOVEMENT IN SAID PASSAGE, MEANS SUPPORTING SAID PLUNGER ON THE UPSTREAM SIDE FOR SAID AXIAL MOVEMENT INTO SAID PASSAGE, MEANS NORMALLY BIASING SAID PLUNGER TO A REST POSITION AT THE INLET OF SAID PASSAGE, AND SAID PASSAGE DECREASING IN CROSS SECTIONAL AREA IN ACCORDANCE WITH THE FORMULA
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) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |