US2436064A

US2436064A - Extraction press

Info

Publication number: US2436064A
Application number: US537290A
Authority: US
Inventors: Harry E Crosby
Original assignee: Individual
Current assignee: Individual
Priority date: 1944-05-25
Filing date: 1944-05-25
Publication date: 1948-02-17
Anticipated expiration: 1965-02-17

Description

Feb. 17, 1948.

H. E. CROSBY EXTRACTION PRESS Filed May 25, 1944 2 Sheets-Sheet 1 n o o o O 0 0 00 o o ffom o o O 0 0 0 coeoococ 00 c 00 o o o o o o o INVENTOR. finer. 4: Ceaaz/ Feb. 17, 1948. H, CROSBY I 2,436,064

EXTRACTION PRES S Filed May 25, 1944 2 Sheets-Sheet 2' Zara [eaaax BY m I512.

H TTORNEY'J' Patented Feb. 17, 194

UNITED STATES PATENT OFFlCE Harry EQCrosby, Los Angeles, Calif.

Application May 25, 1944, Serial No. 537,290

This invention relates to an improved extraction press and has, for one of its principalobjects, the provision of means for a more complete and satisfactory expressing of oils from vegetable materials and more particularly the oil from citrus fruit peel.

. One of the important objects of this invention is to provide an oil extracting press wherein there exists means for free exit of the oil without forcing the same through the entire mass of the pulp. V

Another important object of this invention resides in the provision of an oil press which comprises a conical outer shell in which a screwthreaded pressure element operates and wherein the blades of the screw are of varying pitch and so arranged that the greatest pressure will be applied midway of the cone or funnel, this serving to avoid unnecessary clogging of the exhaust end.

Another and still further important object of the invention is to provide an oil press for citrus fruit pulp or the like which is simple, strong and compact and which can be readily operated with a maximum of efficiency.

Another object of the invention is to provide an adjustable outlet for the exhaust pulp whereby a greater pressure can be built up in the device itself and better oil extraction accomplished.

Other and further important objects of the invention will be apparent from the disclosures in the accompanying drawing and following specification.

The invention, in a preferred form, is shown in the drawings and hereinafter more fully de-- scribed.

In the drawings:

Figure 1 is an elevation, partly in section, of the improved extraction press of this invention.

Figure 2 is a detail view of one half of the cone or funnel element of the improved extraction press of this invention, showing the interior thereof and with the screw element removed.

Figure 3 is a. detail plan view of the base-plate 62, showing the adjustable waste exhaust slots thereof.

Figure 4 is a perspective view, partly cut away, showing a detail of a preferred embodiment of a flushing system used with the apparatus.

Figure 5 is a perspective view of movable plate 23.

As shown in the drawings:

The reference numeral l4 indicates generally the body of the improved extraction press of this invention. the same being provided with supporting legs I2.

thespace between these shell walls 1 Claim. (Cl. -48) as a receptacle for part of the expressed oil or juice. The container I4 is fitted with discharge tubes l6 located adjacent the bottom thereof, and the top of the container I4 is closed by a housing or the like l8. This prevents overflow. Another discharge tube or pipe for extracted oil leads from the center of the bottom of hollow screw 26. V i

Mountedinside the container M is a shell 22 which is also frusto-conical in shape and of fairly heavy construction reinforced by. annular .integral ribs or the like 24.

The walls of this shell 22 between the ribs 24 areperforated as shown at 34, sothat expressed oil. can readily flow out therethrough and into 22 and: the walls'oi the container l4.

Fitted inside the frusto-conical shell member 22 is a similarly shaped screw 26 having threads 28, which threads are of varying pitch, the pitch being at a minimum adjacent the central portion of the screw, as will be evident from an inspection of Figure 1. This varying pitch of the threads brings the greatest pressure midway of the cone or funnel and allows somewhat of an expansion of the pulp adjacent the exhaust end, in this manner eliminating any possible clogging of the pulp or peel exhaust, which is accomplished through openings in the base of the container Id.

The screw element 26 is made hollow, and the walls between the blades or threads 28 are perforated as shown at 32. This perforated wall is sufliciently heavy to resist all maximum pressure while, at the same time, allowing a free passage of the expressed oil therethrough.

A shaft 40 is provided for driving the apparatus, this being attached to any convenient source of power, and a housing 42 is keyed to the shaft 40, this housing being, in turn, fastened by means of bolts or the like 44 to the screwthreaded conical expressing element 28-32.

A framework and bearing retainer is provided by the housing 3, this being also fastened to the shell 22-24, and a peel hopper 48 extends upwardly into this housing, as best shown in Figure 1. A supply spout 50 or any other suitable means for feeding the raw peel to the hopper is also provided. From the hopper 48 the peel passes into a space 58 between the screw 26 and. the shell 22.

As shown in Figure 3 the base 62 of container l4 provides openings 30 through which the waste remaining after the oil is expressed from the peel is discharged. An adjustment of the capacity of these openings is provided by two semicircular plates 23 actuated by lag-screws 25 having reverse threading at opposite ends so that turning of the screws moves the plates forward or backward thereby augmenting or lessening the capacity of the openings and correspondingly affecting the pressure exerted by the screw 26 upon the mass contained within the space 58 between the shell 22 and the screw 26. Mountings for these adjusting screws are shown at 2'! and 29 and the square ends are shown at 3|.

In order to provide for cleaning of the apparatus without dismantling same a flushing system is provided whereby water or other desired medium may be sprayed within the screw member 26, the space 58 and the oil chamber 60. This is best shown in Figure 4 wherein water from supply line 54 is conducted through pipe 56' to perforated rings 52 at the top of space and oil high v percentage of extraction with a correspondingly small expenditure of mechanical energy. and a negligible .loss ofaoil.

I am aware that many changes may be made and. numerous details ofv construction varied throughout a wide range without departing from the principles of this invention, and I, therefore do not purpose limiting the patent grantedhereon otherwise than as necessitated by the prior art. a 1

Number I claim as my invention: v

An extraction press comprising a supporting base, a conical casing surmounting the base, a conical extractor shell in the casing, the walls of the shell being spaced from the casing walls, a conical screw in the shell and spaced therefrom, the walls of the shell and the screw being perforated, the threads of the screw element being non-uniformly spaced and closer to each other adjacent the intermediate'portion of the screw, adjustable outlets in the base for extrusion of waste pulp, said adjustable outlets including plates movable over outlet openings, screw bars for shifting the plates with respect to the outlet openings, andmeans for flushing the space between the extractor shell and the conical screw, saidmeans also including a flushing element for the base.

HARRY E. CROSBY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS.

Name Date Bussells Feb. 20, 1900 Johnson Aug. 24, 1915 Wertenhruch' Apr. 8, 1919 Burrows June 29, 1920 Schueler Sept. 11, 1923 Kaptuller Dec. 4, 1928 FOREIGN PATENTS Country Date ermany Feb. 3, 1913 France June 9, 1933 Number