Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS2310265 A
Publication typeGrant
Publication dateFeb 9, 1943
Filing dateSep 18, 1939
Priority dateSep 18, 1939
Publication numberUS 2310265 A, US 2310265A, US-A-2310265, US2310265 A, US2310265A
InventorsRobert P Sweeny
Original AssigneeRobert P Sweeny
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Pneumatic conveying apparatus
US 2310265 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Feb. 9, 1943. R. P. SWEENY 4 PNEUMATIC CONVEYING APPARATUS v Filed Sept. 18, 1939 m m A p & Q a w fi QM 5 .%N m 5 g N. vg 3 m Patented Feb. 9, 1943 UNITED STATES PATENT OFFICE PNEUMATIC CONVEYING APPARATUS Robert P. Sweeny, Atlanta, Ga.

Application september 18, 1939, Serial No. 295,514

Claims. (Cl. 302-25) v This invention relates to pneumatic conveying apparatus, particularly of the type used in connection with pneumatic cleaning apparatus in cotton mills.

The primary object of the invention is to provide apparatus for conveying dust and lint from 'a cleaning nozzle, which is used to strip lint or fibers from cards in a mill and to collect dust or bits of fibers, into a receiving chamber in which the lint and fibers are collected for reclamation. It is particularly an object to prevent knotting together of the fibers in transit from the nozzle to the receiving chamber.

I A further object is to provide pneumatic conveying apparatus in which none of the lint or other fibers will collect, thus to impair the efliciency of the conveyor.

It is also proposed to provide pneumatic conveying apparatus of particular cross-sectional conformation so as to provide the utmost in efiiciency in the utilization of compressed air as the conveying medium and, simultaneously, to dissipate the major portion of the force of the compressed air by the time the air reaches the conveyor, so as to avoid over-turbulation in the receiving chamber;

These and other objectives will be apparent from the following specification and drawing, in which:

Fig. 1 is a vertical cross section of the induction chamber, nozzle and expansion duct;

Fig. 2 is a cross section taken along line 2-2 of Fig. 1; and

Fig. 3 is an enlarged fragmentary plan view along the line 3-3 of Figure 1 looking in the direction of the arrows.

The constructionand function of the device may best be understood from Fig. 1 which shows the interior arrangement of the elements.

A shell of an induction chamber I4 is indicated by the numeral 52. The inner end of suction intake pipe l0 extends into the interior of a shell 52, where it forms a mouth 54. A flange I2 is provided on the outer end of suction intake pipe In for connection with a pipe (not shown) leading to a cleaning nozzle. Means for securing thesuction intake pipe In to the shell comprises the annular flange 56 which is held against the facing 58 of shell 52 by screws 60. As seen in the lower portion of Fig. 1, induction chamber I4 is provided with an input pipe [6 threaded, at l8, for connection with a pipe (not shown) which, in turn, is connected to a source of compressed air.

In order to prevent eddies from forming in the air flowing through the interior 62 of the induction chamber, a longitudinal rib 64, being shaped on streamlines, is provided on the interior wall of the chamber for dividing the upper portion of the interior into two halves. Fig. 3 shows rib 64 in plan view, looking from the under side in the direction of the arrows along the line 3-3.

Radial streamlined side ribs 65 and 65' extend inwardly from the inner wall of shell 52 for guiding andsupporting nozzle pipe l0 centrally in the chamber, and for guiding the incoming air towards nozzle 54.

Turbulence in the air stream is eliminated by providing the curved, concave end 66 on the inner end of pipe I0, which cooperates with the curved, convex inner face 68 of the shell 52.

At the outlet end I9 of the induction chamber,

the flanged end 12 of section 16 of the sectional expansion duct 20 is secured against flange 10 on shell 52 by means of screws 14. A complementary annular groove 13 and projection on the shell and section, respectively, assure a tight fitting engagement between the chamber and section, as well as a substantially continuous, smooth inner wall. A

The sectional expansion duct 20 is formed of three sections. 16, 88 and 96. Section 16 has a relatively small end adjacent the induction chamber for providing a restricted throat 18 from which the bore flares outwardly as shown at 88.

The flanged end 82 of section 16 is joined to a similarly flanged end 84 of the central section 88 by screws 86.

The central section 88 is substantially uniform in inner diameter throughout its length and, by means of the flanges 98, 92 and screws 94, is secured to the small end of section 96 which is substantially frusto-conical from end to end, and which spirals downwardly in the receiver, as shown in my co-pending application S. N. 329,840.

In operation, the induction chamber and expansion duct cooperate as an integral unit. As compressed fluid, air, is delivered through inlet I 6 into the interior 62 of the induction chamber, the velocity thereof is rapidly increased until it passes the restricted throat 18, thereby setting up a high vacuum at the interior of the mouth 54. The fluid then expands as it passes through the flaring section 88.

Exhaustive tests have proved that passage of air through section 88, which is of substantially uniform cross section throughout, 'produces a great pulling effect in the interior of the nozzle. The fluid is then passed through section 96, which is of gradually increasing cross section from end to end, wherein substantially uniform expansion occurs, from which it is delivered into the receiver.

In practice, a portion of the expansion duct is mounted in the receiving chamber of the cleaning apparatus and spirals downwardly from the top portion thereof.

It is apparent that there are no bumps or sudden interruptions in the path of the fluid which, in prior devices, have decreased the pulling power of the motive fluid. Of vital importance in this particular type of cleaning apparatus, eddies and turbulent currents, which would cause twisting and knotting of the lint, are eliminated.

The invention having been described in the foregoing specification, it is intended that it is not to be limited by the specific structure shown, but that the full scope of the invention be accorded the following claims.

I claim:

1. An induction chamber comprising a curved shell having a central chamber, an output opening through one side wall thereof, an intake opening through the side wall opposite said outlet opening, and an input opening through another side wall thereof, the interior of the wall of said shell from the input opening to said output opening being, in longitudinal cross-section, entirely concave-convex and of continuous, regular curvature, and a nozzle extending through said intake opening and across said central chamber substantially to said output opening, said nozzle comprising a pipe having the outer side thereof adjacent the outlet end curved inwardly from a, point substantially set back from said outlet end to said end, and a longitudinally extending rib, said rib being in plane which includes the longitudinal axis of said nozzle said rib depending inwardly from the wall of said shell, opposite said second input opening, the free edge of said rib being adjacent to said nozzle.

2. An induction chamber as claimed in claim 1, the inner wall of said shell opposite the inwardly curved side of said pipe being of such curvature as to provide a continuously decreasing space therebetween, the inner side of said pipe being straight sided and tapering towards the outlet end thereof.

3. Induction apparatus comprising an induction chamber, an elongated expansion duct at the output opening side of said induction chamber, said expansion duct having a throat portion in direct communication with said output opening, the smallest part of said throat portion being restricted with respect to said output opening and being of substantially uniform continuous cross section for a relatively short distance, a second portion of progressively increasing cross sectional area connecting with said throat portion, a third portion of uniform cross section connecting with said second portion, and a fourth portion of progressively increasing cross sectional area to the output end of said duct connecting with said third portion.

4. Induction apparatus comprising an induction chamber having an output opening, an expansion duct comprised of three separable pieces connected in series, the first of which is connected to said chamber in communication with said output opening, and having a throat portion the smallest part of which is restricted with respect to said output opening and being of substantially uniform continuous cross section for a relatively short distance, a second portion of the bore of which progressively increases in cross sectional area to the end thereof, the middle piece having a bore of substantially uniform cross section throughout and equal, in cross section, to the larger end of said first piece, the third piece having a bore progressively increasing in cross sectional area from the smaller end thereof.

5. Induction cleaning apparatus as defined in claim 1, and nozzle positioning and gas guiding means comprising at least one longitudinally extending rib, said rib extending inwardly from the wall of said shell and being positioned below said first-said rib.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2442898 *Jul 2, 1945Jun 8, 1948Phillips Petroleum CoMethod for quenching fluids
US2587609 *Jun 5, 1947Mar 4, 1952Fisher Andrew JImpact pulverizing apparatus having fluid jets firing toward a common point
US2740491 *May 24, 1952Apr 3, 1956Vecchio LuigiFumes-purifying apparatus
US2821346 *Apr 23, 1953Jan 28, 1958Majac IncInjector for impact pulverizer or the like
US2919901 *Jan 25, 1957Jan 5, 1960Thor Power Tool CoDrill system with suction
US3100724 *Sep 22, 1958Aug 13, 1963Microseal Products IncDevice for treating the surface of a workpiece
US3152839 *Apr 18, 1962Oct 13, 1964Edwards Howard CAbrasive materials handling draft inducer
US3785377 *Nov 9, 1971Jan 15, 1974S JorgensenPlant, preferably for anaesthesia
US3787006 *Apr 7, 1972Jan 22, 1974Inst Pentru Creatie StintificSystem for pneumatically advancing a container within a duct
US3905349 *Dec 7, 1972Sep 16, 1975Church Joseph HInduced air device for discharging spherical members
US3980138 *Nov 15, 1974Sep 14, 1976Knopik Duane LUnderground fluid recovery device
US4019783 *Jul 28, 1975Apr 26, 1977Lutz Tilo KayserProcess and apparatus for continuously conveying particulate material
US4186772 *May 31, 1977Feb 5, 1980Handleman Avrom RingleEductor-mixer system
US4603810 *Mar 8, 1984Aug 5, 1986Arbed S.A.Method and apparatus for the acceleration of solid particles entrained in a carrier gas
US4898517 *Oct 21, 1988Feb 6, 1990Eriksen Olof ASteam/air ejector for generating a vacuum
US5118226 *Sep 10, 1990Jun 2, 1992Toa Kikai Kogyo Co., Ltd.Method for passing a cable, a wire or an optical fiber through a passage
US6030013 *Sep 15, 1999Feb 29, 2000Ball Semiconductor, Inc.Method and apparatus for contactless capturing and handling of spherical-shaped objects
US6048011 *Sep 29, 1998Apr 11, 2000Ball Semiconductor, Inc.Apparatus for contactless capturing and handling of spherical-shaped objects
US6168638Apr 24, 1998Jan 2, 2001Ball Semicondutor, Inc.Touchless stabilizer for processing spherical shaped devices
US6200071 *Dec 22, 1997Mar 13, 2001Applied Science Karasawa Lab. & Co., Ltd.Transfer apparatus and transfer method for particulate material
US6358288 *Oct 13, 1999Mar 19, 2002Ball Semiconductor, Inc.Touchless stabilizer for processing spherical devices
US6402068Dec 27, 1999Jun 11, 2002Avrom R. HandlemanEductor mixer system
US6601365 *Jan 5, 2001Aug 5, 2003Murata Manufacturing Co., Ltd.Component handling apparatus and method of handling the same
US7676965Feb 9, 2007Mar 16, 2010Guardair CorporationAir powered vacuum apparatus
US8591099 *Aug 20, 2012Nov 26, 2013Nestec S.A.Mixing nozzle fitments
US9039385 *Nov 28, 2011May 26, 2015Ford Global Technologies, LlcJet pump assembly
US9085217 *Jun 9, 2010Jul 21, 2015Mitsubishi Heavy Industries, Ltd.Jet pump having scroll shaped flow path
US9145289Apr 6, 2010Sep 29, 2015Nestec S.A.Mixing nozzle fitment and mixed liquid dispenser
US9278843Sep 30, 2013Mar 8, 2016Nestec S.A.Mixing nozzle fitments
US9322400 *Oct 2, 2012Apr 26, 2016Ford Global Technologies, LlcJet pump with centralized nozzle
US9409757Sep 23, 2013Aug 9, 2016Nestec S.A.Mixing nozzle fitments
US20100260892 *Apr 8, 2009Oct 14, 2010Nestec S.A.Mixing nozzle fitments
US20120057993 *Jun 9, 2010Mar 8, 2012Mitsubishi Heavy Industries, Ltd.Aspirator and vehicle air conditioner using the same
US20120325848 *Aug 20, 2012Dec 27, 2012Nestec S.A.Mixing nozzle fitments
US20130133870 *Nov 28, 2011May 30, 2013Ford Global Technologies, LlcJet pump assembly
US20140093401 *Oct 2, 2012Apr 3, 2014Ford Global Technologies, LlcJet pump with centralized nozzle
US20140215842 *Dec 13, 2013Aug 7, 2014Flash Rockwell Technologies, LlcNon-Thermal Drying Systems with Vacuum Throttle Flash Generators and Processing Vessels
EP0456931A1 *Sep 10, 1990Nov 21, 1991Kiyoshi HoriiCoanda spiral flow device
EP2052999A1 *Oct 22, 2008Apr 29, 2009ECON Maschinenbau und Steuerungstechnik GmbhBaffle tube for a plastic granulate transported by air flow
WO1990004720A1 *Oct 13, 1989May 3, 1990Unique Systems, Inc.Steam/air ejector for generating a vacuum
WO2001010609A1 *Aug 9, 1999Feb 15, 2001Ball Semiconductor, Inc.Method and apparatus for contactless capturing and handling of spherical-shaped objects
U.S. Classification406/194, 417/151
International ClassificationB01F5/04, B01F3/06, B65G53/58
Cooperative ClassificationB65G53/58, B01F2003/061, B01F2005/0448, B01F5/0413, B01F5/0426
European ClassificationB01F5/04C12S2, B65G53/58, B01F5/04C12