US3236535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Level sensing device
Assignee: Caterpillar Global Mining LLC
•
Filing: 1964-03-30
•
Granted: 1966-02-22
•
Expires: 1984-03-30
Abstract
No abstract record available.
Inventors
- 👤 Donald E Barber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:01
CPC Classifications
G; G01; G01C; G01C9/00; G01C9/18; G01C9/20; G01C9/22; B; B66; B66C; B66C23/00; B66C23/62; B66C23/72; B66C23/78; E; E02; E02F; E02F9/00; E02F9/02; E02F9/08; E02F9/10; E02F9/26; B66C2700/00; B66C2700/03; B66C2700/0321; B66C2700/0357; B66C2700/0378
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
IN A LEVEL SENSING APPARATUS, THE COMBINATION COMPRISING; A PAIR OF VESSELS MOUNTED IN FIXED SPACIAL RELATIONSHIP TO ONE ANOTHER ALONG A LINE TO BE COMPARED WITH HORIZONTAL THE ATTITUDE OF SAID LINE BEING VARIABLE SO AS TO MOVE SAID VESSELS VERTICALLY RELATIVE TO ONE ANOTHER; A LIQUID NORMALLY FILLING EACH OF SAID VESSELS TO A PREDETERMINED LEVEL; A CONDUIT COMMUNICATING BETWEEN SAID LIQUID IN SAID VESSELS, SAID CONDUIT BEING FILLED WITH A LIQUID AND ADAPTED TO HAVE A SMALL FLUID CONDUCTING CAPACITY AS COMPARED WITH THE CAPACITY OF SAID VESSELS; AND A PROXIMITY SENSING DEVICE MOUNTED ADJACENT EACH OF SAID VESSELS, RESPONSIVE TO THE PROXIMITY OF SAID LIQUID IN SAID VESSELS AND ADAPTED TO EMIT A SIGNAL WHEN SAID LEVEL OF LIQUID IN SAID VESSELS VARIES FROM SAID PREDETERMINED NORMAL LEVEL.
Claim 2
Dependent Claim
132 words
IN A LEVEL SENSING APPARATUS, THE COMBINATION COMPRISING; A PAIR OF VESSELS MOUNTED IN FIXED SPACIAL RELATIONSHIP TO ONE ANOTHER ALONG A LINE TO BE COMPARED WITH HORIZONTAL THE ATTITUDE OF SAID LINE BEING VARIABLE SO AS TO MOVE SAID VESSELS VERTICALLY RELATIVE TO ONE ANOTHER; A LIQUID NORMALLY FILLING EACH OF SAID VESSELS TO A PREDETERMINED LEVEL; A CONDUIT COMMUNICATING BETWEEN SAID LIQUID IN SAID VESSELS, SAID CONDUIT BEING FILLED WITH A LIQUID AND ADAPTED TO HAVE A SMALL FLUID CONDUCTING CAPACITY AS COMPARED WITH THE CAPACITY OF SAID VESSELS; AND A PROXIMITY SENSING DEVICE MOUNTED ADJACENT EACH OF SAID VESSELS, RESPONSIVE TO THE PROXIMITY OF SAID LIQUID IN SAID VESSELS AND ADAPTED TO EMIT A SIGNAL WHEN SAID LEVEL OF LIQUID IN SAID VESSELS VARIES FROM SAID PREDETERMINED NORMAL LEVEL.
References Cited (Backward Citations)
US347589A
Cited
US986210A
Cited
US2062674A
Cited
US2101837A
Cited
US2142680A
Cited
US2202009A
Cited
US2268017A
Cited
US2859393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |