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Publication numberUS3294317 A
Publication typeGrant
Publication dateDec 27, 1966
Filing dateNov 3, 1964
Priority dateNov 27, 1963
Also published asDE1283160B
Publication numberUS 3294317 A, US 3294317A, US-A-3294317, US3294317 A, US3294317A
InventorsFrancesco Moretti
Original AssigneeOhg E Fonderie A Bosco S P A
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Device for opening the discharge opening of a hydroextractor and concurrently locking the extractor
US 3294317 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Dec. 27, 1966 F. MORETTl 3,294,317

DEVICE FOR OPENING THE DISCHARGE OPENING OF A HYDRO-EXTRACTOR AND CONCURRENTLY LOCKING THE EXTRACTOR Filed Nov. 5, 1964 United States Patent DEVICE FOR (DPENING THE DISCHARGE OPEN- HNG OF A HYDROEXTRACTQR AND CQNCUR- RENTLY LUCKING THE EXTRACTUR Francesco Moretti, Terni, Italy, assignor to Uficine Meccaniche e Fonderie A. Bcsco S.p.A., Terni, Italy Filed Nov. 3, 1964, Ser. No. 408,618 Claims priority, application Italy, Nov. 27, 1963, 93/409 4 Claims. (Cl. 23320) The present invention relates to a door shutter device for opening the exhaust or discharge bore of the basket of a hydroextractor, effecting also a locking action on the shaft of the hydroextractor itself.

It is known that for closing the exhaust bore from the baskets of the centrifugal hydroextractors usually a cone member is used which will be removed when the centrifuged products are to be discharged.

This system, besides obstructing the inside of the basket, does not allow a uniform loading so that it is necessary to adopt certain devices for introducing the product to be centrifuged.

By the system according to this invention, on the contrary, the shutter does not internally obstruct the basket, and also its doors form a common plane with the bottom of the basket; this result during the loading stage is particularly suitable for a uniform distribution of the product to be centrifuged.

A main purpose of this invention is that of embodying a locking device for the shaft allowing the discharge of the product under conditions of absolute safety, since with conventional systems, i.e, with a nonlocked shaft, the scraping hub for the shaft can strike the filter of the basket and damage it.

By the locking system according to this invention, any movement of the basket will be, of course, prevented, and any possibility of damage will be thereby avoided.

This invention will be now described with reference to the attached drawings showing a preferred embodiment selected only by way of example.

FIG. 1 is a longitudinal cross sectional view of a hydroextractor with a shutter assembly in its closed position;

FIG. 2 shows the same cross sectional View, but with the shutter assembly in opened position;

FIG. 3 is a partial top plane view of the inside of the basket with the doors of the shutter assembly located as in FIG. 1.

With reference to the drawings, 1 is the shaft of the hydroextractor whereon is mounted a basket 2, by means of a spoked hub 3. The basket is located inside a housing 4 which in its lower portion carries, mounted under an exhaust cylinder 5, a locking ring for the shaft. This ring consists of an outer flanged ferrule 6, an inner ring 7 and three ribs 8.

The shaft 1 is provided at its lower portion with an extension at the end of which is mounted a piston 16. In the lower portion of the hub 3 is mounted a hollow body 11. The main body of the control cylinder for the shutter 10 glides at its upper part along the hollow body 11 and at its lower portion along the piston 16.

A diaphragm 13 serves the purpose of dividing the shutter body into two compressed air chambers. A rotary two-way coupling 12 fixed under the piston, co-axial with the shaft, serves for supplying compressed air either into the upper chamber or into the lower chamber of the loading cylinder of the shutter, causing thereby the lowering or the raising thereof.

Accordingly, by means of a lever 9 the three doors 15 of the shutter are caused to rotate about their hinges 14 causing the opening or closing of said shutters, the shutters being closed as shown in FIG. 2.

In the lower part of the body of the control cylinder for the shutter, a bearing is mounted which, when the shutter is lowered, will seat into the locking ring, as shown in FIG. 2.

The present invention has been illustrated and described with reference to one preferred embodiment, it being, however, understood that constructive variations may be made without departing from the scope of the invention.

What is claimed is:

1. A shutter device for the discharge opening of a basket of a hydroextractor having a shaft, a hub coupled to the shaft and spokes connecting the hub with the basket to define a plurality of apertures at said discharge opening, said device comprising means for closing the apertures at said discharge opening including a plurality of doors one for each discharge opening, displaceable cylinder means mounted on said hub and coupled to the doors for pivotally opening the doors downwardly as the cylinder means is lowered, a bearing mounted on said cylinder means and a stationary ring for receiving the bearing when the cylinder means is lowered to prevent oscillation of the basket and positively lock the shaft of the basket.

2. A device as claimed in claim 1, wherein said means for closing the apertures rotates together with the basket and is provided with an axial reciprocatory movement.

3. A device as claimed in claim 2 wherein the doors do not obstruct the inside of the basket and define a perfectly planar surface which allows a uniform loading of the product to be centrifuged.

4. A device as claimed in claim 2, wherein by means of the bearing mounted on the cylinder means it is pos sible to avoid the reciprocatory oscillations of the shaft of the basket during the discharge operation and thereby provide safety if the discharge is effected by means of scraping devices.

References Cited by the Applicant UNITED STATES PATENTS 3,056,505 10/ 1962 Andersson. 3,061,181 10/1962 Gooch. 3,092,579 6/ 1963 Moretti.

FOREIGN PATENTS 239,168 10/1911 Germany. 760,064 10/ 1956 Great Britain. 170,658 3/1960 Sweden.

M. CARY NELSON, Primary Examiner.

H. T. KLINKSIEK, Assistant Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3056505 *Oct 20, 1959Oct 2, 1962Landsverk AbCentrifuges
US3061181 *Nov 28, 1958Oct 30, 1962Sharples CorpCentrifuges
US3092579 *Nov 6, 1962Jun 4, 1963Ohg E Fonderie A Bosco SocietaEmptying system for rotary containers
DE239168C * Title not available
GB760064A * Title not available
SE170658A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3768726 *May 6, 1970Oct 30, 1973Autometrics CoMethod and apparatus for the removal of entrained gases from mineral slurries, pulps, liquids, and the like
US3773253 *May 25, 1972Nov 20, 1973Western States Machine CoCentrifugal basket bottom valve machanism
US3961746 *Jun 28, 1974Jun 8, 1976Salzgitter Maschinen AktiengesellschaftCentrifuge with a device for blocking and unblocking an opening thereof
US4549964 *Jun 2, 1983Oct 29, 1985Enso-Gutzeit OyDevice for flushing obstructions from the reject head of a centrifugal separator
US5328441 *Jul 20, 1993Jul 12, 1994Carr Engineering Associates, Inc.Imperforate bowl centrifugal separator with solids gate
US20140256528 *Nov 20, 2012Sep 11, 2014Bma Braunschweigische Maschinenbauanstalt AgDiscontinuous centrifuge with a scraper for scraping a product
CN101898174A *Jun 25, 2010Dec 1, 2010溧阳市超强链条制造有限公司Discharge device of dewatering bucket in centrifugal machine drum
CN101898174BJun 25, 2010Oct 19, 2011溧阳市超强链条制造有限公司Discharge device of dewatering bucket in centrifugal machine drum
CN103648653A *Nov 20, 2012Mar 19, 2014Bma布伦瑞克机器制造有限公司Discontinuous centrifuge comprising a scraper for scraping away a product
CN103648653B *Nov 20, 2012Jun 29, 2016Bma布伦瑞克机器制造有限公司具有用于刮除产品的刮除器的间歇式离心分离机
U.S. Classification494/12, 494/26, 210/147, 494/56, 210/369
International ClassificationB04B11/00, B04B11/05
Cooperative ClassificationB04B11/05
European ClassificationB04B11/05