US3176801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precision motion control device
Assignee: Northrop Grumman Corp
•
Filing: 1962-10-12
•
Granted: 1965-04-06
•
Expires: 1982-10-12
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Huff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:53
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/06; F15B11/072; F15B11/076; B; B60; B60G; B60G2202/00; B60G2202/30; B60G2202/32; F15B2211/00; F15B2211/20; F15B2211/21; F15B2211/216; F15B2211/40; F15B2211/405; F15B2211/40576; F15B2211/40592; F15B2211/415; F15B2211/41527; F15B2211/41536; F15B2211/42; F15B2211/426; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7055; F15B2211/7056; F15B2211/75; F15B2211/80; F15B2211/885; F15B2211/8855
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A MOTION CONTROL DEVICE COMPRISING, IN COMBINATION: AN EXPANSIBLE-CHAMBER DEVICE INCLUDING PISTON MEANS, TWO EXPANSIBLE CHAMBERS, AND CONDUIT MEANS CONNECTING SAID EXPANSIBLE CHAMBERS FOR FLUID TRANSFER THEREBETWEEN MY MOVEMENT OF SAID PISTON MEANS, MOTION-TRANSMITTING MEANS DRIVINGLY CONNECTED WITH SAID PISTON MEANS AND ADAPTED TO BE DRIVINGLY CONNECTED WITH MOTIVE MEANS AND WITH A DEVICE TO BE DRIVEN THEREBY, VALVE MEANS INTERPOSED IN SAID CONDUIT MEANS FOR REGULATING A FLOW OF FLUID BETWEEN SAID EXPANSIBLE CHAMBERS TO CONTROL MOTION OF SAID MOTION-TRANSMITTING MEANS, AND MEANS FOR ESTABLISHING A PRESSURE EXCEEDING A PREDETERMINED VALUE IN HYDRAULIC FLUID WITHIN SAID EXPANSIBLE CHAMBERS COMPRISING A DIFFERENTIAL PISTON HAVING TWO ACTIVE UNEQUAL AREAS, TOGETHER WITH MEANS FOR SUBJECTING THE LARGER OF SAID AREAS TO A PRESSURE OF SAID PREDETERMINED VALUE, AND THE SMALLER OF SAID AREAS TO THE HYDRAULIC FLUID PRESSURE OBTAINING WITHIN SAID CYLINDER.
Claim 2
Dependent Claim
140 words
A MOTION CONTROL DEVICE COMPRISING, IN COMBINATION: AN EXPANSIBLE-CHAMBER DEVICE INCLUDING PISTON MEANS, TWO EXPANSIBLE CHAMBERS, AND CONDUIT MEANS CONNECTING SAID EXPANSIBLE CHAMBERS FOR FLUID TRANSFER THEREBETWEEN MY MOVEMENT OF SAID PISTON MEANS, MOTION-TRANSMITTING MEANS DRIVINGLY CONNECTED WITH SAID PISTON MEANS AND ADAPTED TO BE DRIVINGLY CONNECTED WITH MOTIVE MEANS AND WITH A DEVICE TO BE DRIVEN THEREBY, VALVE MEANS INTERPOSED IN SAID CONDUIT MEANS FOR REGULATING A FLOW OF FLUID BETWEEN SAID EXPANSIBLE CHAMBERS TO CONTROL MOTION OF SAID MOTION-TRANSMITTING MEANS, AND MEANS FOR ESTABLISHING A PRESSURE EXCEEDING A PREDETERMINED VALUE IN HYDRAULIC FLUID WITHIN SAID EXPANSIBLE CHAMBERS COMPRISING A DIFFERENTIAL PISTON HAVING TWO ACTIVE UNEQUAL AREAS, TOGETHER WITH MEANS FOR SUBJECTING THE LARGER OF SAID AREAS TO A PRESSURE OF SAID PREDETERMINED VALUE, AND THE SMALLER OF SAID AREAS TO THE HYDRAULIC FLUID PRESSURE OBTAINING WITHIN SAID CYLINDER.
References Cited (Backward Citations)
US217275A
Cited
US1310199A
Cited
US725456A
Cited
DE694872C
Cited
US2624318A
Cited
US2857789A
Cited
US2807336A
Cited
US2999412A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |