Patent US3394590A successfully refreshed from Google Patents.
US3394590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic system and liquid level sensing mechanism therefor
Assignee: Hudson Engineering Co
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Filing: 1966-06-01
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Granted: 1968-07-30
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Expires: 1986-06-01
Abstract
No abstract record available.
Inventors
- 👤 Pellegrino E Napolitano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:03
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/14; G01F23/16; G01F23/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A LIQUID LEVEL SENSING APPARATUS COMPRISING, A FIRST CYLINDER CLOSED AT EACH END THEREOF, A FIRST MEMBER MOVABLE WITHIN AND FORMING WITH SAID CYLINDER A FIRST AND SECONE CHAMBER, SAID FIRST CHAMBER OF SAID FIRST CYLINDER HAVING AN OPENING FOR RECEIVING A LIQUID WHOSE PRESSURE IS TO BE SENSED BY SAID FIRST MOVABLE MEMBER AS AN INDICATION OF THE LEVEL OF SAID LIQUID IN A CONTAINER, A SECOND CYLINDER SECOND CYLINDER VIA SAID FLUID CONDIUT WHEREBY SAID UTILIZATION DEVICE RECEIVES A LIQUID PRESSURE THAT IS A HYDRAULIC MULTIPLICATION OF THE LIQUID PRESSURE SENSED BY SAID FIRST MOVABLE MEMBER AND TRANSMITTED TO SAID SECOND MOVABLE MEMBER BY SAID CONNECTING ROD.
Claim 2
Dependent Claim
109 words
A LIQUID LEVEL SENSING APPARATUS COMPRISING, A FIRST CYLINDER CLOSED AT EACH END THEREOF, A FIRST MEMBER MOVABLE WITHIN AND FORMING WITH SAID CYLINDER A FIRST AND SECONE CHAMBER, SAID FIRST CHAMBER OF SAID FIRST CYLINDER HAVING AN OPENING FOR RECEIVING A LIQUID WHOSE PRESSURE IS TO BE SENSED BY SAID FIRST MOVABLE MEMBER AS AN INDICATION OF THE LEVEL OF SAID LIQUID IN A CONTAINER, A SECOND CYLINDER SECOND CYLINDER VIA SAID FLUID CONDIUT WHEREBY SAID UTILIZATION DEVICE RECEIVES A LIQUID PRESSURE THAT IS A HYDRAULIC MULTIPLICATION OF THE LIQUID PRESSURE SENSED BY SAID FIRST MOVABLE MEMBER AND TRANSMITTED TO SAID SECOND MOVABLE MEMBER BY SAID CONNECTING ROD.
References Cited (Backward Citations)
US151367A
Cited
US2144020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |