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Patent US3320673A successfully refreshed from Google Patents.
US3320673A
Expired / Lapsed
US
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Hydraulic measuring device
Assignee: NEDMAC Inc
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Filing: 1965-10-14
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Granted: 1967-05-23
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Expires: 1985-10-14
Abstract
No abstract record available.
Inventors
- 👤 Harvey D Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:17
CPC Classifications
B; B23; B23Q; B23Q17/00; B23Q17/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A HYDRAULIC LINEAR MEASURING DEVICE INCLUDING: (A) A FIRST HYDRAULIC ASSEMBLY INCLUDING A CYLINDER WITH A FLUID CONTAINED THEREIN AND HAVING A FIRST POSITIVE FLUID DISPLACEMENT ELEMENT OPERABLE THEREIN SAID ELEMENT ARRANGED FOR ATTACHMENT TO A MOVABLE APPARATUS WHEREBY MOVEMENT OF THE APPARATUS WILL PRODUCE A VARIATION OF THE FLUID WITHIN THE CYLINDER; (B) A SECOND HYDRAULIC ASSEMBLY INCLUDING A CYLINDER WITH A FLUID CONFINED THEREIN AND HAVING A SECOND POSITIVE FLUID DISPLACEMENT ELEMENT THEREWITH; (C) A PAIR OF SPRING MEMBERS IN SAID SECOND ASSEMBLY IN ACTUATING RELATION TO SAID SECOND FLUID DISPLACEMENT ELEMENT, ONE OF SAID SPRING MEMBERS ARRANGED FOR MOVEMENT WITH SAID SECOND FLUID DISPLACEMENT ELEMENT;
Claim 2
Dependent Claim
108 words
A HYDRAULIC LINEAR MEASURING DEVICE INCLUDING: (A) A FIRST HYDRAULIC ASSEMBLY INCLUDING A CYLINDER WITH A FLUID CONTAINED THEREIN AND HAVING A FIRST POSITIVE FLUID DISPLACEMENT ELEMENT OPERABLE THEREIN SAID ELEMENT ARRANGED FOR ATTACHMENT TO A MOVABLE APPARATUS WHEREBY MOVEMENT OF THE APPARATUS WILL PRODUCE A VARIATION OF THE FLUID WITHIN THE CYLINDER; (B) A SECOND HYDRAULIC ASSEMBLY INCLUDING A CYLINDER WITH A FLUID CONFINED THEREIN AND HAVING A SECOND POSITIVE FLUID DISPLACEMENT ELEMENT THEREWITH; (C) A PAIR OF SPRING MEMBERS IN SAID SECOND ASSEMBLY IN ACTUATING RELATION TO SAID SECOND FLUID DISPLACEMENT ELEMENT, ONE OF SAID SPRING MEMBERS ARRANGED FOR MOVEMENT WITH SAID SECOND FLUID DISPLACEMENT ELEMENT;
References Cited (Backward Citations)
US2371893A
Cited
GB992478A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-22 | 1970-11-21 | 1971-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-22 | 1974-11-21 | 1975-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-22 | 1978-11-21 | 1979-05-23 | $7700.00 | Window Closed / Lapsed |