公开(公告)号：US5102436A

公开(公告)日：1992-04-07

申请号：US771053

申请日：1991-10-02

Applicant: Dietmar Grabowski

Inventor： Dietmar Grabowski

IPC: B01D46/00 ,  B01D46/24 ,  B01D46/54 ,  F02B75/02 ,  F02M35/024

CPC classification number: F02M35/024 ,  B01D46/0023 ,  B01D46/2411 ,  B01D46/54 ,  B01D2201/40 ,  B01D2265/027 ,  B01D2265/028 ,  B01D2279/60 ,  F02B2075/025 ,  Y10S55/31

Abstract: A prefilter for an air main filter of an internal combustion engine such as a two-stroke engine is configured as a filter ring with the engine being especially a two-stroke engine in a handheld work tool. The filter ring defines a flow directed essentially radially inward and the prefilter has a band-like configuration and is mounted for covering the outer surface of the main filter. The prefilter includes a screen held in a flexible frame and so permits a rapid exchange thereof and is easy to clean and does not restrict the air throughput. The frame carries a part of the closure device at each end thereof lying in the longitudinal direction.

Abstract translation: 诸如二冲程发动机的内燃机的空气主过滤器的预过滤器被构造为过滤器环，其中发动机特别是手持式工具中的二冲程发动机。 过滤环限定基本上径向向内指向的流体，并且预过滤器具有带状构造并且被安装用于覆盖主过滤器的外表面。 预过滤器包括保持在柔性框架中的屏幕，因此允许其快速交换并且易于清洁并且不限制空气通过量。 框架在其纵向方向上的每一端承载封闭装置的一部分。