US3359385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow sensing device
Assignee: Caterpillar Inc
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Filing: 1966-06-09
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Granted: 1967-12-19
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Expires: 1986-06-09
Abstract
No abstract record available.
Inventors
- 👤 Erwin J H Bentz
- 👤 Philip J Costa
- 👤 Clyde E Fulton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:10
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/40; H01H35/405; G; G01; G01P; G01P13/00; G01P13/0006; G01P13/0026; G01P13/0033
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
200 words
A SENSING DEVICE FOR SENSING FLUID FLOW IN A CONDUIT AND FOR ACTUATING ELECTRICAL FLUID FLOW MONITORING APPARATUS ASSOCIATED WITH THE DEVICE, THE DEVICE COMPRISING IN COMBINATION A HOUSING HAVING A FIRST CYLINDRICAL PORTION EXTENDING FROM OUTSIDE TO INSIDE THE CONDUIT AND A SECOND NARROW ELONGATED CYLINDRICAL PORTION DISPOSED IN THE FLUID STREAM WITHIN THE CONDUIT; MAGNETICALLY OPERABLE REED SWITCH MEANS HERMETICALLY ENCLOSED WITHIN THE SECOND PORTION OF THE HOUSING AT A LOCATION APPROXIMATELY MIDWAY THE LENGTH OF THE SECOND PORTION; A FLEXIBLE FLOW SENSING MEANS CONSISTING OF A LIGHT, FLEXIBLE, NARROW SPRING LEAF, OF SUBSTANTIALLY EQUAL LENGTH WITH THE SECOND PORTION, HINGEDLY DEPENDING FROM THE FIRST PORTION OF THE HOUSING AT A SHORT PREDETERMINED DISTANCE FROM THE OUTER CIRCUMFERENCE OF THE SECOND PORTION, THE LONGITUDINAL AXIS OF THE SPRING LEAF BEING SUBSTANTIALLY PARALLEL TO THE LONGITUDINAL AXIS OF THE SECOND PORTION OF THE HOUSING AT FLUID STANDSTILL CONDITIONS; A PERMANENT MAGNET DISPOSED ON THE SPRING LEAF APPROXIMATELY MIDWAY THE LENGTH OF THE SPRING LEAF BUT ON THE SIDE OF THE SPRING LEAF FARTHER FROM THE SWITCH MEANS SUCH THAT A RATE OF FLUID FLOW ABOVE A PREDETERMINED VALUE URGES THE MAGNET TOWAD THE SWITCH MEANS TO ACTUATE THE SWITCH.
Claim 2
Dependent Claim
200 words
A SENSING DEVICE FOR SENSING FLUID FLOW IN A CONDUIT AND FOR ACTUATING ELECTRICAL FLUID FLOW MONITORING APPARATUS ASSOCIATED WITH THE DEVICE, THE DEVICE COMPRISING IN COMBINATION A HOUSING HAVING A FIRST CYLINDRICAL PORTION EXTENDING FROM OUTSIDE TO INSIDE THE CONDUIT AND A SECOND NARROW ELONGATED CYLINDRICAL PORTION DISPOSED IN THE FLUID STREAM WITHIN THE CONDUIT; MAGNETICALLY OPERABLE REED SWITCH MEANS HERMETICALLY ENCLOSED WITHIN THE SECOND PORTION OF THE HOUSING AT A LOCATION APPROXIMATELY MIDWAY THE LENGTH OF THE SECOND PORTION; A FLEXIBLE FLOW SENSING MEANS CONSISTING OF A LIGHT, FLEXIBLE, NARROW SPRING LEAF, OF SUBSTANTIALLY EQUAL LENGTH WITH THE SECOND PORTION, HINGEDLY DEPENDING FROM THE FIRST PORTION OF THE HOUSING AT A SHORT PREDETERMINED DISTANCE FROM THE OUTER CIRCUMFERENCE OF THE SECOND PORTION, THE LONGITUDINAL AXIS OF THE SPRING LEAF BEING SUBSTANTIALLY PARALLEL TO THE LONGITUDINAL AXIS OF THE SECOND PORTION OF THE HOUSING AT FLUID STANDSTILL CONDITIONS; A PERMANENT MAGNET DISPOSED ON THE SPRING LEAF APPROXIMATELY MIDWAY THE LENGTH OF THE SPRING LEAF BUT ON THE SIDE OF THE SPRING LEAF FARTHER FROM THE SWITCH MEANS SUCH THAT A RATE OF FLUID FLOW ABOVE A PREDETERMINED VALUE URGES THE MAGNET TOWAD THE SWITCH MEANS TO ACTUATE THE SWITCH.
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) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |