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. 29, 2008
Filed:
Oct. 04, 2002
Hartmut Benckert, Filderstadt, DE;
Paul Von Baeumen, Sindelfingen, DE;
Wolf-michael Petzold, Aichwald, DE;
Hartmut Benckert, Filderstadt, DE;
Paul Von Baeumen, Sindelfingen, DE;
Wolf-Michael Petzold, Aichwald, DE;
Putzmeister Aktiengesellschaft, Aichtal, DE;
Abstract
A thick matter pump comprising a drive motor (), a (reversible) hydraulic pump (), and two hydraulic cylinders (') coupled to conveyor cylinders (′) for conveying the thick matter. A regulator regulates the rotational speed N of the drive motor (), and a regulating clement () regulates the displacement volume V of the hydraulic pump (). A control module () regulates the rotational speed N of the motor and the displacement volume V. For improved operational ease and reduction of fuel requirements, noise and waste gas emission, the control module () comprises a final control element () for regulating the conveyance capacity of the conveyor cylinders (′), and an electronic control unit () which reacts to the position of the final control element () and allocates a nominal value to the rotational speed regulator and to the displacement volume regulator (), in a software-assisted manner.