US3186771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for proportionating the pneumatic braking of motor vehicles to the load transported by the vehicle
Assignee: Industrie Magneti Marelli SRL
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Filing: 1963-04-22
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Granted: 1965-06-01
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Expires: 1983-04-22
Abstract
No abstract record available.
Inventors
- 👤 Alfieri Giuseppe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:41
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/18; B60T8/1812; B60T8/1831
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A DEVICE FOR PROPORTIONING THE PRESSURE REQUIRED IN A PNEUMATIC SYSTEM OF BRAKING VEHICLES AUTOMATICALLY IN ACCORDANCE WITH THE LOAD COMPRISING A SLIDABLE PISTON SEALABLY MOUNTED IN A CYLINDER MOUNTED ON A VEHICLE FRAME, RESILIENT MEANS FOR MOVING SAID PISTON IN RESPONSE TO THE RELATIVE MOVEMENT BETWEEN THE FRAME AND AN AXLE, AND INTERCEPTION VALVE ASSEMBLY ACTUATED BY SAID PISTON AND POSITIONED IN THE DUCT IN SAID CYLINDER THROUGH WHICH THE AIR PASSES TO THE BRAKING SYSTEM, AN AIR CHAMBER DEFINED BY THE UPPER SURFACE OF SAID PISTON AND THE LOWER WALL OF SAID DUCT AND AT LEAST ONE CALIBRATED OPENING CONNECTING SAID CHAMBER AND SAID DUCT TO EQUALIZE THE PRES-
Claim 2
Independent Claim
111 words
A DEVICE FOR PROPORTIONING THE PRESSURE REQUIRED IN A PNEUMATIC SYSTEM OF BRAKING VEHICLES AUTOMATICALLY IN ACCORDANCE WITH THE LOAD COMPRISING A SLIDABLE PISTON SEALABLY MOUNTED IN A CYLINDER MOUNTED ON A VEHICLE FRAME, RESILIENT MEANS FOR MOVING SAID PISTON IN RESPONSE TO THE RELATIVE MOVEMENT BETWEEN THE FRAME AND AN AXLE, AND INTERCEPTION VALVE ASSEMBLY ACTUATED BY SAID PISTON AND POSITIONED IN THE DUCT IN SAID CYLINDER THROUGH WHICH THE AIR PASSES TO THE BRAKING SYSTEM, AN AIR CHAMBER DEFINED BY THE UPPER SURFACE OF SAID PISTON AND THE LOWER WALL OF SAID DUCT AND AT LEAST ONE CALIBRATED OPENING CONNECTING SAID CHAMBER AND SAID DUCT TO EQUALIZE THE PRES-
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) | 1968-05-31 | 1968-11-30 | 1969-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-31 | 1972-11-30 | 1973-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-31 | 1976-11-30 | 1977-06-01 | $7700.00 | Window Closed / Lapsed |