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. 21, 2004
Filed:
May. 02, 2002
Laurentius Andreas Gerhardus Mentink, Haaksbergen, NL;
Johnny Antonius Jacobus Wiggemans, Oldenzaal, NL;
Actuant Corporation, Glendale, WI (US);
Abstract
The present invention relates to a hydraulic actuating device for a device having a first and a second hydraulically moveable component. This actuating device comprises a first and a second hydraulic actuator, respectively, for moving the first and second moveable components. The first and second actuators each have a housing in which there is a space in which a piston and piston rod assembly can move in a reciprocating manner, with a piston and a piston rod which is coupled to the piston and projects out of the housing. The piston delimits a first working chamber and a second working chamber in the housing. The housing is provided with a first and a second connection, which are respectively in communication with the first and second working chambers in order to supply and discharge hydraulic fluid in order to displace the piston and piston rod assembly. The actuating device further comprises a connecting line which forms an open connection between the second working chamber of the first actuator and the first working chamber of the second actuator. The actuating device also comprises a pump having a delivery port and a suction port of the pump being connected to the reservoir, and valve means, having one or more actuable valves. The hydraulic actuating device is useful in controlling convertible tops of automobiles.