In-tank return line filter element and hydraulic reservoir with same

US7252759B2 · kind B2 · utility

Assignee

• SCHROEDER INDUSTRIES, LLC · US

Inventors

• Steven R. Evanovich · Pittsburgh, US
• Augustus O. Schroeder · Pittsburgh, US
• Norbert Sann · Riegelsberg, DE
• Michael Sakraschinsky · Sankt Ingbert, DE
• Christopher B. Bortnik · Warrendale, US
• Joseph Francis Ickes · Baden, US

Key dates

• Filing date: Jul 12, 2004
• Grant date: Aug 7, 2007
• Expiry date: Feb 14, 2025

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D35/147
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A top or bottom mounted, in-line, in-tank return line filter element is mounted in a hydraulic reservoir. The reservoir includes a holding tank, at least one outlet extending from and one return line extending to the reservoir, an in-tank return line within the reservoir and extending to one return line, and an in-tank return line filter element mounted within the in-tank return line. The in-tank return line filter element includes an end cap, a filter media and a by-pass valve coupled thereto. The end cap includes a central fluid opening, a mounting surface for the filter media, and a peripheral attaching mechanism for attaching the filter element to the in-tank return line to form a filter assembly. The mounting surface is positioned between the central opening and the attaching mechanism such that an in-line, in-tank filter element is provided.