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:
Aug. 30, 1988
Filed:
Jun. 03, 1987
Applicant:
Inventors:
John A Ritter, Cincinnati, OH (US);
Keith J Hallam, Roswell, GA (US);
Assignee:
Thrall Car Manufacturing Company, Chicago Heights, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B61D / ;
U.S. Cl.
CPC ...
105240 ; 105253 ; 105290 ; 1053112 ; 105313 ; 298 30 ;
Abstract
A railroad hopper car having bottom discharge doors, an elongated beam assembly along the bottom of the car, door operating levers to open and close the doors connected to the beam assembly and doors, and lost motion connections in the beam assembly which permit displacement of beam sections to open and close pairs of doors in a sequential but substantially simultaneous and automatic order, and a pneumatic drive to move the beam in opposite directions to open and close the doors.