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:
Apr. 26, 2005
Filed:
Nov. 21, 2002
Aleksandar M. Egelja, Naperville, IL (US);
Mikhail A. Sorokine, Naperville, IL (US);
Rangamani Srikrishnan, Aurora, IL (US);
Aleksandar M. Egelja, Naperville, IL (US);
Mikhail A. Sorokine, Naperville, IL (US);
Rangamani Srikrishnan, Aurora, IL (US);
Caterpillar Inc, Peoria, IL (US);
Abstract
A pump displacement control arrangement uses the inherent swivel torques of a fluid translating device in cooperation with a proportional force feedback to more consistently and precisely control the displacement of the fluid translating device. The subject invention uses a variable displacement control arrangement having an actuator mechanism coupled to a swash plate of the fluid translating device and controlled by a proportional valve arrangement to control the displacement of the fluid translating device. A force feedback mechanism is disposed between the actuator mechanism and the proportional valve arrangement and provides a more precise and repeatable displacement control.