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:
Jan. 23, 2001
Filed:
Jul. 20, 1999
Heinz Torkler, Rothenfels, DE;
Mannesmann Rexroth AG, Lohr/Main, DE;
Abstract
In the case of ferries, floating bridges or the like, a bridge support and a ramp forming the connection to the bank are connected to one another pivotably via a pivot point. For adjusting the ramp incline, a differential cylinder is arranged between the bridge support and the ramp in the area of the pivot point. The piston surfaces of the differential cylinder are impinged upon with a pressure that adjusts itself in accordance with the respective loading of the ramp. The pressure in the cylinder chamber on the rod side is a measure of the bending moment in the connecting area of the ramp to the bridge support. A pressure limiting valve, serving as a safety valve, limits the pressure in the cylinder chamber on the rod side and consequently the bending moment in the connecting area of the ramp to the bridge support. The pressure limiting valve is arranged in a line connecting the two cylinder chambers directly to one another. When the pressure limiting valve responds, hydraulic medium is displaced out of the cylinder chamber on the rod side and fed to the cylinder chamber on the head side. Connected to the low-pressure side of the pressure limiting valve is a volume equalization container which provides a volume equalization between the hydraulic medium displaced out of the cylinder chamber on the rod side and the hydraulic medium required by the cylinder chamber on the head side when the pressure limiting valve responds and which takes up pressure medium from the cylinder chamber on the head side not required by the cylinder chamber on the rod side when the ramp is relieved of load. This device is used in the case of ferries, floating bridges or the like in which a bridge support, a ramp and a differential cylinder connected to them form a bending-resistant support.