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:
Dec. 26, 2000
Filed:
Feb. 17, 1999
Applicant:
Inventors:
Stephen R Kuhn, Richton Park, IL (US);
Keith Young, Naperville, IL (US);
Ilia Petkov, Colorado Springs, CO (US);
Assignee:
ABC Rail Products Corporation, Chicago, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E01B / ;
U.S. Cl.
CPC ...
246382 ; 246275 ; 246276 ; 246257 ; 246274 ; 246389 ; 188 61 ; 188 31 ;
Abstract
A railroad frog assembly is provided with a spring wing rail multi-position holdback subassembly that continuously retains the spring wing rail in each spring wing rail open position when activated by the wheels of a railcar traversing the frog assembly, and that automatically deactivates the multi-position holdback subassembly and releases the spring wing rail from retention in an open condition and for complete closing after the last railcar wheel has passed through the frog assembly.