Prefilter for an air filter of an internal combustion engine

Details Prefilter for an air filter of an internal combustion engine Prefilter for an air filter of an internal combustion engine

1991-10-02

1992-04-07

Hart, Charles

Gas separation

Two or more separators

With framework for edge to edge relation

55487, 55496, 55498, 55511, 55521, 55525, 55DIG31, B01D 4600

Patent

active

051024365

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.

REFERENCES:
patent: 3408438 (1968-10-01), Staunton
patent: 3560131 (1971-02-01), Yotsumoto
patent: 3561604 (1971-02-01), Yotsumoto
patent: 3621640 (1971-11-01), Ohno et al.
patent: 3710562 (1973-01-01), McKenzie
patent: 4464260 (1984-08-01), Duneau
patent: 4969999 (1990-11-01), Riddell

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