Patent US516924A successfully refreshed from Google Patents.
US3374035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake control systems for multiple unit trains
Assignee: SPX Technologies Inc
•
Filing: 1966-07-01
•
Granted: 1968-03-19
•
Expires: 1986-07-01
Abstract
No abstract record available.
Inventors
- 👤 James Y Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:37
CPC Classifications
B; B60; B60T; B60T15/00; B60T15/02; B60T15/04; B60T15/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
A BRAKE CONTROL SYSTEM FOR A MULTIPLE UNIT TRAIN HAVING A MAIN LOCOMOTIVE AT THE HEAD OF THE TRAIN AND A HELPER LOCOMOTIVE AT AN INTERMEDIATE POINT IN THE TRAIN, EACH OF THE LOCOMOTIVES HAVING AIR BRAKE CONTROL APPARATUS, COMPRISING, COMMUNICATION MEANS FOR COMMUNICATING BRAKE CONTROL SIGNALS FROM THE MAIN LOCOMOTIVE TO THE HELPER LOCOMOTIVE, A BRAKE CONTROL AIR LINE EXTENDING THROUGHOUT SUBSTANTIALLY THE ENTIRE LENGTH OF THE TRAIN FOR CONTROLLING APPLICATION OF BRAKES BY THE RESPECTIVE CARS OF THE TRAIN IN ACCORDANCE WITH AIR PRESSURE IN THE AIR LINE, SECTIONALIZING MEANS CONTROLLED BY AT LEAST ONE OF THE BRAKE CONTROL SIGNALS COMMUNICATED FROM THE MAIN LOCOMOTIVE FOR SECTIONALIZING THE BRAKE LINE AT THE LOCATION OF THE HELPER LOCOMOTIVE IN THE TRAIN INTO FORWARD AND REAR CONTROL SECTIONS, AND MEANS EFFECTIVE WHEN THE BRAKE LINE IS SECTIONALIZED FOR CONTROLLING THE REAR SECTION OF THE LINE BY THE AIR BRAKE CONTROL APPARATUS ASSOCIATED WITH THE HELPER LOCOMOTIVE IN ACCORDANCE WITH THE BRAKE CONTROL SIGNALS COMMUNICATED FROM THE MAIN LOCOMOTIVE.
Claim 2
Dependent Claim
168 words
A BRAKE CONTROL SYSTEM FOR A MULTIPLE UNIT TRAIN HAVING A MAIN LOCOMOTIVE AT THE HEAD OF THE TRAIN AND A HELPER LOCOMOTIVE AT AN INTERMEDIATE POINT IN THE TRAIN, EACH OF THE LOCOMOTIVES HAVING AIR BRAKE CONTROL APPARATUS, COMPRISING, COMMUNICATION MEANS FOR COMMUNICATING BRAKE CONTROL SIGNALS FROM THE MAIN LOCOMOTIVE TO THE HELPER LOCOMOTIVE, A BRAKE CONTROL AIR LINE EXTENDING THROUGHOUT SUBSTANTIALLY THE ENTIRE LENGTH OF THE TRAIN FOR CONTROLLING APPLICATION OF BRAKES BY THE RESPECTIVE CARS OF THE TRAIN IN ACCORDANCE WITH AIR PRESSURE IN THE AIR LINE, SECTIONALIZING MEANS CONTROLLED BY AT LEAST ONE OF THE BRAKE CONTROL SIGNALS COMMUNICATED FROM THE MAIN LOCOMOTIVE FOR SECTIONALIZING THE BRAKE LINE AT THE LOCATION OF THE HELPER LOCOMOTIVE IN THE TRAIN INTO FORWARD AND REAR CONTROL SECTIONS, AND MEANS EFFECTIVE WHEN THE BRAKE LINE IS SECTIONALIZED FOR CONTROLLING THE REAR SECTION OF THE LINE BY THE AIR BRAKE CONTROL APPARATUS ASSOCIATED WITH THE HELPER LOCOMOTIVE IN ACCORDANCE WITH THE BRAKE CONTROL SIGNALS COMMUNICATED FROM THE MAIN LOCOMOTIVE.
References Cited (Backward Citations)
US3206257A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |