WO2025166172 - VARIABLE VALVE FOR RAIL CAR BRAKING SYSTEM
National phase entry is expected:
Publication Number
WO/2025/166172
Publication Date
07.08.2025
International Application No.
PCT/US2025/014048
International Filing Date
31.01.2025
Title **
[English]
VARIABLE VALVE FOR RAIL CAR BRAKING SYSTEM
[French]
SOUPAPE VARIABLE POUR SYSTÈME DE FREINAGE DE VOITURE FERROVIAIRE
Applicants **
NEW YORK AIR BRAKE LLC
Inventors
BRUSHWOOD, Daniel
Priority Data
63/627,130
31.01.2024
US
Application details
| Total Number of Claims/PCT | * |
| Number of Independent Claims | * |
| Number of Priorities | * |
| Number of Multi-Dependent Claims | * |
| Number of Drawings | * |
| Pages for Publication | * |
| Number of Pages with Drawings | * |
| Pages of Specification | * |
| * | |
| Number of Office Actions | * |
| * | |
International Searching Authority |
EPO
* |
| Recordal of a Change of the Applicant's Name/Address |
Change of Applicant's Name and Address
* |
| Type of Assignment |
The Standard Agent's Assignment
* |
| Applicant's Legal Status |
Legal Entity
* |
| * | |
| * | |
| * | |
| * | |
| * | |
| Entry into National Phase under |
Chapter I
* |
| Patent Delivery |
Send the Letters Patent by Courier
* |
| Translation |
|
* The data is based on automatic recognition. Please verify and amend if necessary.
** IP-Coster compiles data from publicly available sources. If this data includes your personal information, you can contact us to request its removal.
Quotation for National Phase entry
| Country | Stages | Total | |
|---|---|---|---|
| China | Filing, Examination, Granting | 2023 | |
| EPO | Filing, Examination, Granting | 8149 | |
| Japan | Filing, Examination, Granting | 2169 | |
| South Korea | Filing, Examination, Granting | 2050 | |
| USA | Filing, Examination, Granting | 4740 |
Total:
19,131
Contact Us
Abstract[English]
A variable valve (10) that can proportion the amount of pressure provided by the control valve (CV) of a rail car to the brake cylinder (BC) of the rail car based on the loaded state of the rail car. The variable valve (10) has an arm (14) that extends to contact the side frame of a rail car in response to a brake application to detect the loaded state of the car. The arm (14) provides a variable amount of biasing force against a proportional spool (60) that is moveable to close communication between the pressure output (22) from the control valve (CV) and the pressure inlet (26) of the brake cylinder (BC). As a result, the proportional spool (60) will close communication between the control valve (CV) and the brake cylinder (BC) at a lower pressure for an unloaded rail car than a more fully loaded car.[French]
L'invention concerne une soupape variable (10) qui peut proportionner la quantité de pression fournie par la soupape de commande (CV) d'une voiture ferroviaire au cylindre de frein (BC) de la voiture ferroviaire sur la base de l'état de chargement de la voiture ferroviaire. La soupape variable (10) a un bras (14) qui s'étend pour entrer en contact avec le châssis latéral d'une voiture ferroviaire en réponse à l'application d'un frein pour détecter l'état de chargement de la voiture. Le bras (14) fournit une quantité variable de force de sollicitation appliquée sur une bobine proportionnelle (60) qui est mobile pour fermer une communication entre la sortie de pression (22) provenant de la soupape de commande (CV) et l'entrée de pression (26) du cylindre de frein (BC). Par conséquent, la bobine proportionnelle (60) ferme la communication entre la soupape de commande (CV) et le cylindre de frein (BC) à une pression inférieure pour une voiture ferroviaire non chargée plutôt que pour une voiture dont le chargement est plus important.