Pump arrangement of a work device

The pump arrangement addresses the issue of damage from overload by using a positively engaged plastic liquid connection part within a metal assembly, ensuring easy repair and robustness by confining damage to the replaceable plastic component, thus maintaining the integrity of the metal assembly parts.

DE102024138100A1Pending Publication Date: 2026-06-18ANDREAS STIHL AG & CO KG
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Patent Information

Application Number
DE102024138100
Authority / Receiving Office
DE · DE
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-12-16
Publication Date
2026-06-18

AI Technical Summary

Technical Problem

Existing pump arrangements in liquid-carrying work devices, such as pressure washers, are prone to damage from overload due to accidental impacts, requiring complex disassembly and replacement of both the liquid connection part and the associated pump assembly part, which complicates repair.

Method used

A pump arrangement where the liquid connection part is positively engaged between two metal pump assembly parts, forming a frictional connection, with plastic liquid connection components acting as a predetermined breaking point under overload, and featuring three positive locking elements to ensure precise, load-bearing positioning without transmitting forces to the assembly parts.

Benefits of technology

The design allows for easy assembly and disassembly, ensuring that overload damage is confined to the liquid connection part, making the pump assembly robust and facilitating simple repair by replacing only the plastic component, while maintaining the integrity of the metal pump assembly parts.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to a pump assembly (2) of a liquid-carrying device (1), in particular a high-pressure cleaning device, with a pump (3) for conveying the liquid, and to a method for assembling such a pump assembly. The pump assembly (2) comprises a liquid connection part (4), a first pump assembly part (5), and a second pump assembly part (6), wherein the first and the second pump assembly parts (5, 6) are detachably connected to one another and, in particular, screwed together. The liquid connection part (4) is positively locked between the first and the second pump assembly parts (5, 6).
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Citation Information

Patent Citations

  • high pressure cleaning device

    DE102005050009A1

  • Housing arrangement for a piston pump

    DE102012219606A1

  • high pressure cleaning device

    DE29701555U1

  • High-pressure cleaner

    EP1141550B1

  • High-pressure cleaning device

    WO2014000823A1