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Publication numberUS2601907 A
Publication typeGrant
Publication dateJul 1, 1952
Filing dateSep 22, 1949
Priority dateSep 22, 1949
Publication numberUS 2601907 A, US 2601907A, US-A-2601907, US2601907 A, US2601907A
InventorsBurrows Milford D, Siwek Stanley Z
Original AssigneePioneer Gen E Motor Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Rotary screen for motor assemblies
US 2601907 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

July 1, 1952 M. D. BURROWS ET AL 2,601,907

ROTARY SCREEN FOR MOTOR ASSEMBLIES Filed Sept. 22, l949 ,[nveniorfl Milford .flfiurroms ,StarzZeg 2.5620672" @M MM Patented July 1, 1Q52 ROTARY SCREEN FOR MOTOR ASSEMBLIES Milford D. Burrows and Stanley Z. Siwek, Chicago, Ill., assignors to Pioneer Gen-E-Motor Corporation, Chicago, Ill., a corporation of Delaware Application September 22, 1949, Serial No. 117,233

2 Claims. 1

The invention relates to an improvement in fans or air cleanersfor rotating members, including motor fly wheels. One purpose is to provide an improved motor assembly with a shroud inlet for air, having a screen rotating with a fly wheel-fan unit.

Another purpose is to provide a rotating screen or cleaner of an improved form.

Another purpose is to provide such a cleaner with a minimum of exposed area, and with edges shielded and supported.

Other purposes will appear from time to time in the course of the specification and claims.

The invention is illustrated more or less diagrammatically in the accompanying drawings wherein:

Figure 1 is a side elevation with parts broken away; and

Figure 2 is a section, on an enlarged scale, on the line 22 of Figure 1.

Like parts are indicated by like symbols throughout the specification and drawings.

Referring to the drawings, I generally indicates an outer shroud of an internal combustion engine. The shroud is shown as having an air inlet 2 defined by and surrounded by a circumferential lip 3, shown as ofiset from the body of the shroud. 4 indicates part of an engine housing, the details of which form no part of the present invention. 5 is a motor shaft of the engine mounted, for example, in any suitable bearing portion 6, and extending outwardly beyond the housing portion or wall 4.

The shaft 5 is shown as carrying a fly wheel I, the fly wheel being formed, if desired, with fan elements or components 8. The fly wheel is shown as having a hub portion 9 mounted on a tapered portion In of the shaft, and connected in pgsition, for example, by a washer II and nut Between the washer H and the hub 9 is illustrated, first, a pulley I3, which may, for example, be the launching pulley around which a launching or starting rope or wire may be mounted, for manual starting of the motor. Between the pulley l3 and the hub 9 we illustrate the screen element H. The screen element 14 is shown as having the inner portion l5, which is actually compressed between the hub 9 and the opposed face of the pulley. It is shown as outwardly flared, as at l6, and as provided with a somewhat conic or tapered portion [1 which terminates in an inwardly turned lip I8. The lip l8 clears and underlies the edge of the flange 3 surrounding the shroud aperture, and abuts 2 against and is supported by the fan components 8.

.It will be understood that when the motor is actuated and the fly wheel is rotating, the screen or cleaner l4 also rotates. Its outer edge portion I8 is supported and strengthened by contact with the fan components 8, but the intermediate portion H is So sloped or inclined that it will centrifugally throw particles along a path which misses the exterior of the flange 3. Thus a substantial proportion of the larger particles or impurities inthe indrawn air will actually be thrown centrifugally outwardly along paths which clear the edge of the air inlet aperture 2.

It is a matter of choice whether we employ a foraminous sheet, as shown, or some other type of air pervious structure, such as screening or the like. However, a foraminous stamped sheet has certain advantages, since it may be accurately formed to size and shape, and easily and accurately fitted in position.

It will be realized that whereas we describe and show a practical and operative device, nevertheless many changes may be made in size, shape, number and disposition of parts. We therefore wish the description and drawings to be taken as in a broad sense illustrative or diagrammatic, rather than as limiting us to our precise showing.

We claim:

a1. In an engine structure, the combination comprising a shaft, a fly wheel having fan components mounted on the shaft for rotary motion therewith, a shroud within which the fly wheel rotates, said shroud having an air inlet concentric with the axis of rotation of the shaft, a starter pulley exterior to the shroud, and a rotary screen mounted on said shaft for rotation therewith, said screen including a'central portion adapted'to be secured to the flywheel, and a conic circumferential portion extending outwardly beyond the plane of the shroud and having a terminal conic portion terminating inwardly withinthe shroud.

2. In an engine structure, the combination comprising a shaft, a fly wheel having fan com- I ponents mounted on the shaft for rotary motending outwardly adjacent the plane of the shroud and having a terminal conic portion ter- REFERENCES CITED The following references are of record 'in the file of this patent:

UNITED STATES PATENTS Name Date Davis June 29, 1897 Phelps June 3, 1930 McFarland et a1. June 3, 1941 Packwood July 27, 1948

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US585188 *Jun 27, 1894Jun 29, 1897 Screen attachment for suction or exhaust fans
US1762028 *Mar 10, 1926Jun 3, 1930Phelps Mfg CompanyExhaust fan
US2244165 *May 25, 1939Jun 3, 1941Hoover CoSuction cleaner
US2445965 *Aug 7, 1946Jul 27, 1948Packwood Heza HPower lawn mower with air filtering screen
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2764390 *Apr 1, 1954Sep 25, 1956Gen ElectricAnti-icing device
US2823656 *Sep 27, 1954Feb 18, 1958Gen Motors CorpAir filter
US3183899 *Nov 14, 1962May 18, 1965Outboard Marine CorpChaff-proof air intake arrangement
US3252449 *Jul 31, 1964May 24, 1966Briggs & Stratton CorpScreen unit for air cooled internal combustion engines
US3433206 *Aug 4, 1967Mar 18, 1969Pennington Clifford CAnti-clog device for air intake on air-cooled gas engines
US3751191 *Feb 2, 1971Aug 7, 1973Mott CorpHydraulic pump and cooler unit
US4838908 *Jul 27, 1988Jun 13, 1989Kohler Co.Engine air intake screen assembly
US5000769 *Apr 16, 1990Mar 19, 1991BrevetSystem for ventilating a rail traction motor and for dynamically purifying the ventilation air
US5114446 *Feb 15, 1991May 19, 1992United Technologies CorporationDeoiler for jet engine
US5167209 *Mar 5, 1992Dec 1, 1992Dufern Richard LEngine filter assembly
US5285751 *Jul 28, 1993Feb 15, 1994Kohler Co.Engine air intake screen assembly
US6022391 *Jan 29, 1999Feb 8, 2000United Air Filter, Inc.Filter assembly for cleaning cooling air for engines
US6162269 *Apr 26, 1999Dec 19, 2000United Air Filter, Inc.Filter assembly for cleaning cooling air for engines
US7225765May 4, 2006Jun 5, 2007Briggs And Stratton CorporationEngine assembly
US7914609Oct 28, 2008Mar 29, 2011Briggs & Stratton CorporationCyclonic air cleaner assembly
US8241378Jan 27, 2011Aug 14, 2012Briggs & Stratton CorporationCyclonic air cleaner assembly
US20060266308 *May 4, 2006Nov 30, 2006Leech Paul AEngine assembly
US20090107087 *Oct 28, 2008Apr 30, 2009Briggs & Stratton CorporationCyclonic air cleaner assembly
US20110120310 *Jan 27, 2011May 26, 2011Briggs & Stratton CorporationCyclonic air cleaner assembly
DE965177C *Aug 2, 1952Jun 6, 1957Kloeckner Humboldt Deutz AgWassergekuehlte Brennkraftmaschine
DE19833473B4 *Jul 24, 1998Jan 19, 2006Kioritz Corp.Element zum Verhindern des Partikeleintritts bei einem luftgekühlten Verbrennungsmotor
U.S. Classification55/406, 415/121.2, 123/41.65, 55/439, 123/41.7
International ClassificationF02B63/02, F01P11/00, F01P11/12, F02B63/00
Cooperative ClassificationF01P11/12, F02B63/02
European ClassificationF01P11/12