The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 24, 1998
Filed:
Nov. 13, 1996
Robert C Kull, Olney, MD (US);
Richard S Klemanski, Walkersville, MD (US);
Westinghouse Air Brake Company, Wilmerding, PA (US);
Abstract
A radio-based system for a train including a lead transceiver unit and multiple remote transceiver units. The lead transceiver unit initiates a command by sending a command message. Each of the remote transceivers receiving the command message transmits a reply message which repeats the command message and contains the status of the sending remote. Remote transceivers not receiving the lead transceiver's transmitted command message, but receiving a reply message from one of the other remote transceivers, transmit a reply message containing the remote's status. The lead transceiver detects whether reply messages are received from the remote transceivers and may transmit a request in response. One or more remote transceivers may store and re-transmit reply messages from other transceivers in response to the request.