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:
May. 17, 1988
Filed:
Jan. 22, 1987
Sandro Pasquini, La Tour-de-Peilz, CH;
Kershaw Manufacturing Co., Inc., Montgomery, AL (US);
Abstract
The tamping machine is provided with tamping units on which each tamping tool (8) is articulated on a junction lever (26) controlled for work pivoting by a piston-cylinder unit (28) connected to a forced oscillation generator (24). The tamping tool (8) can be lifted into out-of-use position on the junction lever (26) by means of an intermediate lever (30) driven by a second hydraulic piston-cylinder unit (31), this intermediate lever being connected to said tool by a connecting link (36). In the lowered working position, the articulation (29) of the intermediate lever and the two articulations (34, 35) of the connecting link are aligned and the piston-cylinder unit (31) for the driving of the intermediate lever is abutted at the end of its stroke. As a result, the tamping tool (8) constitutes the equivalent of a rigid tool with respect to the transmission of the tamping and forced-oscillation forces.