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. 19, 1978
Filed:
Oct. 17, 1977
Applicant:
Inventors:
Josef Theurer, Vienna, AT;
Wilhelm Praschl, Linz-Urfahr, AT;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E01B / ;
U.S. Cl.
CPC ...
104 12 ;
Abstract
A tamping head with a pair of vibratory and reciprocatory tamping tools mounted on a vertically adjustable carrier for immersion in the ballast in the cribs, with the ties positioned between the tools. Each tamping tool is constituted by a lever pivotal in a vertical plane about a transverse pivot, and stops are mounted on the carrier for setting at least three different reciprocating strokes for the tamping tools, with a remote-controlled multi-step drive for setting the stops.