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Publication numberUS1839379 A
Publication typeGrant
Publication dateJan 5, 1932
Filing dateMay 3, 1928
Priority dateMay 3, 1928
Publication numberUS 1839379 A, US 1839379A, US-A-1839379, US1839379 A, US1839379A
InventorsDowning Edwin J
Original AssigneeGardner Denver Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1839379 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Jan. 5, 1932. DOWN- 1,839,379

SCREEN Filea May 5, .928

wuem co v s 'dwrl/J Patented Jan. 5, 1932 UNITED STATES PATENT OFFICE,


The present invention relates to screensv particularly intended for removing particles of dirt from air used to operate pneumatic tools or the like.

The object is to provide a simple, compact structure that can be placed in the hose line and will occupy but little space, sa1d means constituting an eti'ectlve screen and one which can be easily cleansed.

being provided with an inlet port 8 and theother with an outlet port 9. The terminal portion 6 is provided with opposite longitudinal external ribs 10 preferably formed in the shape of arrows, to indicate that said terminal is the inlet end. The walls of the inlet and outlet ports are internally threaded to receive the sections 11 and 12 of a conduit,

The section 12 is shown in the form'of the usual goose-neck that is attached to the drilling motor of a rock drill.

Located within the chamber 5 and adjacent to the outlet port 9 is a cup 13 whose open end faces the inlet port 8 and has an internal diameter substantially the same as the said inlet port. The bottom of this cup is conical. The side walls of this cup 13 are spaced from the chamber walls except for the provision of webs 14 that serve as supports for the said cup. Obviously therefore, as shown'in Figure 2, there is free communication between the inlet port and the outlet port through the chamberand around the cup13.

A c lindrical 0 en ended screen 15 has its ends fitted into the inner end of the inlet port 8 and the interior of the cup 13; This screen is preferably made of a sheet of resilient metal that can be bent around the finger and placed in position, its expansive action thus assuring its end-s having tight 1928. Serial No. 274,831.-

fits or bearings in the inlet port and cup. To prevent the outward longitudinaldisplacement of the screen, a split ring 16 is fitted into the inner end of the inlet port and the walls thereof at said inner end are provided with a seat 17 to receive the ring 16. This ring thus constitutes an abutment for the outer end of the screen and because of the conical interior formation of the cup and the expansible properties of the screen, said screen will be forced snuglyagainst the ring.

As clearly indicated in Figure 2, air flowing through the conduit must pass into the interior of the screen, thence outwardly there.- through intothe chamber, and on to the outlet around the cup. The screen can be readily removed and it may be cleaned by reversing the flow of air through the casing.

From the foregoing, it is thought that the construction, operation and many advantages of the herein described invention will be apparent to those skilled in the art, without further description, and it will be understood that various changes in the size, shape, proportion and minor detailsof construction may be resorted to without departing from the spirit'or sacrificing any of the.

when so urged longitudinally.

In testimony whereofll afiix my signature.


Referenced by
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US2600219 *May 26, 1949Jun 10, 1952Paul E DiederichCrankcase ventilator filter
US2613498 *Oct 25, 1949Oct 14, 1952Gen ElectricOil separation and reclaiming means for gas turbine power plants
US2655161 *Jan 7, 1950Oct 13, 1953Choldun Mfg CorpFluid separating and preserving means for apparatus for cleaning vehicle radiators or the like
US2672950 *Jul 3, 1951Mar 23, 1954Leiman Bros IncGas and oil separator
US2837058 *Mar 31, 1955Jun 3, 1958Taylor Edward FBackfill tamper
US5505753 *Sep 12, 1994Apr 9, 1996Heysek; Ralph G.Aircraft pneumatic air filter
US5624133 *Oct 26, 1995Apr 29, 1997Trw Inc.Prefilter for gas generating air bag inflator
US5637125 *Oct 26, 1995Jun 10, 1997Max Co., Ltd.Air filter assembly for pneumatic tool
US5769914 *Jun 6, 1996Jun 23, 1998Divine Pill Industrial Co., Ltd.Accumulator/filter assembly of compressor for coolant
US6824583 *Jan 29, 2003Nov 30, 2004George F. BulgerVelocity stack air system for motorcycles
US20030159413 *Jan 29, 2003Aug 28, 2003Bulger George F.Velocity stack air system for motorcycles
DE19539950C2 *Oct 26, 1995Nov 11, 1999Max Co LtdLuftfilteranordnung für ein pneumatisches Werkzeug
U.S. Classification55/498, 55/509, 96/417, 116/200, 55/503, 116/205
International ClassificationB25D17/00
Cooperative ClassificationB25D17/00
European ClassificationB25D17/00