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:
Jun. 24, 2025
Filed:
Feb. 21, 2022
Gea Mechanical Equipment Italia S.p.a., Parma, IT;
GEA MECHANICAL EQUIPMENT ITALIA S.p.A., Parma, IT;
Abstract
A piston pump including a membrane separating a product side from a hydraulic side for a hydraulic fluid, a reciprocating piston operatively active on the hydraulic fluid, and a valve system to establish a selective fluid communication between the hydraulic side and a tank containing the hydraulic fluid. The valve system includes a first valve arrangement that, in a working condition of the piston pump, is configured to discharge the hydraulic fluid having a pressure over a first threshold from the hydraulic side towards the tank and to draw the hydraulic fluid from the tank to the hydraulic side when a pressure in the hydraulic side dropping below a second threshold, and a second valve arrangement that, in at least one non-working condition of the piston pump, is configured to discharge the hydraulic fluid having a pressure over a third threshold from the hydraulic side towards the tank.