Hydraulic power trim lift device for a marine propulsion system and marine propulsion system

US11970257B2 · kind B2 · utility

Assignee

• HAWE Hydraulik SE · DE

Inventors

• Paul Franz · Lengenwang, DE
• Florian Mayr · Kerschlach, DE
• Jürgen Osterried · Pfronten, DE

Key dates

• Filing date: May 26, 2021
• Grant date: Apr 30, 2024
• Expiry date: Aug 17, 2042

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B63H20/10
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A hydraulic power trim lift device for a marine propulsion system has at least one lift cylinder, at least one pump and a tank. The lift cylinder has a lift piston chamber and a lift rod chamber separated from the lift piston chamber by a lift cylinder piston. The pump is connected to the lift rod chamber via a first line arrangement and to the lift piston chamber via a second line arrangement. The lift piston chamber is connected to the tank via the second line arrangement when the first line arrangement is pressurized. The second line arrangement has a flow control device acting in the direction of flow to the tank. Furthermore, a marine propulsion system with such a power trim lift device is provided.