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. 13, 1990
Filed:
Feb. 09, 1987
Applicant:
Inventors:
Roy J Moore, Columbia, SC (US);
Calvin L Coy, Chapin, SC (US);
Assignee:
Tamper Corp., Columbia, SC (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E01B / ;
U.S. Cl.
CPC ...
104 12 ;
Abstract
There is described a track travelling railroad switch tamping machine which has a transversally extending guide frame at its front end and four ballast tamping units one each mounted in individual sub-frames which are mounted on the guide frame. Hydraulic power means are provided to individually move each of the sub-frames with its tamping unit, transversally of the vehicle on the guide frames, independentally of each other sub-frame. Individual hydraulic power devices are provided on each sub-frame for individually raising and lowering each tamping unit within its own sub-frame, independently of the other tamping units.