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. 11, 2014
Filed:
Jul. 15, 2011
Davide Guglielmo, Bologna, IT;
Giuliano Luzzi, Osteria Grande-Castel San Pietro Terme, IT;
Stefano Bittoni, Bologna, IT;
Davide Guglielmo, Bologna, IT;
Giuliano Luzzi, Osteria Grande-Castel San Pietro Terme, IT;
Stefano Bittoni, Bologna, IT;
Alstom Transport SA, Levallois-Perret, FR;
Abstract
A hydraulic oil control unit for supplying hydraulic oil actuators in switch machines of railway points or the like is described. The control unit comprises a closed circulation circuit of a hydraulic oil fluid with delivery and return lines. These lines are connected to a hydraulic oil actuator translating point blades of the railway point for moving the point blades from a normal end position to a reverse end position or vice versa. The control unit also includes: electrical means for monitoring the movement of the point blades and/or reaching of the end position, timing means for stopping an actuating stroke of actuators moving the point blades, and means for switching the direction of the actuating stroke. The electrical means comprise switches reversing the power supply signal of an electric motor driving the pump for reversing the rotational direction of the motor and the pump. The switches are driven when the point blades reach a proper end position to reverse the circulation direction of the hydraulic oil fluid flow in the circulation circuit.