Reciprocating piston pump comprising a housing defining a first chamber and a second chamber cooperating with a first piston and a second piston to define a third chamber and a fourth chamber

US11815078B2 · kind B2 · utility

Assignee

• OSHKOSH CORPORATION · US

Inventors

• Kai Schubart · Oshkosh, US
• Christopher J. Rukas · Oshkosh, US
• Patrick S. Dillman · Hartford, US
• Erik S. Ellifson · Oshkosh, US
• Aaron J. Rositch · Omro, US

Key dates

• Filing date: Oct 6, 2022
• Grant date: Nov 14, 2023
• Expiry date: Oct 6, 2042

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04B27/005
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A pump system includes a housing defining a first internal volume and a second internal volume, a first piston positioned to separate the first internal volume into a first chamber and a second chamber, a second piston positioned to separate the second internal volume into a third chamber and a fourth chamber, a directional control valve (DCV) fluidly coupled to the second chamber and the fourth chamber, a first relief valve fluidly coupled to the DCV via a first control line and the second chamber via a first sensing line, a first orifice positioned along the first sensing line, a second relief valve fluidly coupled to the DCV via a second control line and the fourth chamber via a second sensing line, and a second orifice positioned along the second sensing line.