Gerald Stanley Fields

US Patent:

40280764, Jun 7, 1977

Filed:

Aug 18, 1975

Appl. No.:

5/605345

Inventors:

Gerald S. Fields - Boulder CO

Assignee:

Parma Industries, Inc. - Longmont CO

International Classification:

B01D 4516

US Classification:

55394

Abstract:

An air precleaner for internal combustion engines having a central conduit for conducting precleaned air to the air intake of the engine. A housing is disposed around the central conduit and forms an air intake opening, an arcuate wall spaced radially outwardly from the conduit and substantially concentric therewith for conducting the incoming air stream from the intake opening around the conduit so that any dust in the air stream is collected along the housing wall by centrifugal action, and a dust outlet for discharging dust from the housing at the downstream end of the arcuate wall. The conduit forms clean air port near the downstream end of the arcuate wall for discharging clean air from the inner region of the space between the arcuate wall and the conduit. An internal baffle integral with one side of the intake opening extends between the arcuate wall and the conduit and forms a restricted passageway that increases the velocity of the incoming air at the upstream end of the arcuate wall. The internal baffle also forms a dust-receiving chamber at the downstream end of the arcuate wall, with the dust-receiving chamber communicating with the dust outlet for discharging dust from the housing.