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Publication numberUS1977017 A
Publication typeGrant
Publication dateOct 16, 1934
Filing dateNov 14, 1932
Priority dateNov 14, 1932
Publication numberUS 1977017 A, US 1977017A, US-A-1977017, US1977017 A, US1977017A
InventorsSchiller Charles C
Original AssigneeSchiller Charles C
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Citrus fruit corer
US 1977017 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Oct. 16, 1934- c. c. SCHILLER CITRUS FRUIT CORER Filed Nov. 14, 1932 C. C. SCHILLER.

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Patented Oct. 16, 1934 UNITsosT TEs CITRUS FRUIT CORER Charles C. Schiller, St. Petersburg, Fla.

Application November 14, 1932, Serial No. 642,638

2 Claims.

This invention relates to corers for citrus fruits.

The general object of the invention is the provision of a corer adapted to be pushed down through the axial portion of the fruit until its lower end is substantially against the inner surface of the skin at the opposite end, and then rotated so as to detach the core or rag from the skin.

Since the performance of this function requires that the core rotate unitarily with the corer, and

the core of the grapefruit unlike the firm homogeneous core portion of an apple, is a mere axis of pith with an attached membrane or rag and too loosely constructed to rotate in its natural con- 5 sistency, with the corer, a problem exists which the present invention solves successfully, first by compressing the core condensing its mass to a state of substantially homogeneity, providing an inclined tongue or interdigitating member which 20. enters radially into the core as the latter is condensed, further compressing the core by displacement, and causing the core to pack firmly on both sides of the tongue so that it becomes an effective coupling between the core and corer, compelling the core to rotate with the corer.

Other objects'of the invention will appear as the following description of a preferred and practical embodiment thereof proceeds.

In the drawing which accompanies and forms a part of the following specification and throughout the several figures of which the same characters of reference have been employed to designate identical parts,

Figure 1 is a longitudinal section, taken along 5 the line 11 of Figure 2, and partly in elevation illustrating a corer embodying the features of the present invention; 7

Figure 2 is a similar view in elevation, taken at right angles to the view shown in Figure 1;

Figure 3 is a section taken along the line 33 of Figure 1, looking downward; and

Figure 4 is a section taken along the line 4-4 of Figure 2, looking downward.

Referring now in detail to the several figures,

the numeral 1 represents a handle which may be of any desired shape or material, but being shown with a reduced lower portion 2 forming a circumferential rabbet 3 receiving the end of a hollow cylinder 4 preferably of sheet metal. This cylinder extends below the lower end of the handle forming a socket 5 designedly considerably shallower than the depth of the core so that when the corer is pressed into the core, the latter will be compressed in the socket and be made relatively solid and homogeneous in its consistency.

A portion of the cylinder is turned in radially forming a tongue or interdigitating member 6 which is inclined at its inner edge toward the center of the lower end of the handle. The tongue 6 defines with the opposite wall of the socket 5 a sectional area 7 which converges toward the inner end of the socket, so that as the core is compressed into the socket, it will be diverted by the inclined edge of the tongue 6 and still further condensed in the said convergent sectional area, so that the tongue 6 will be imbedded within the core by displacement, the core in the region of said displacement packing itself firmly on opposite sides of the tongue 6 so that the latter becomes an effective coupling between 1 the core and corer, compelling the core to rotate when the corer is rotated. The edge of the core is preferably blunt so as to displace the fibrous portions of the core without cutting them. The lower end of the hollow cylinder 3 may be bevelled 7.5. as indicated at 8, preferably on the outside as shown.

The edges 9 and 10 of the sheet metal cylinder are spaced apart as shown at 11 in Figure 2, forming a slot in which a knife or other pointed instrument may be inserted for the purpose of removing the core. Another method of expelling the core is to hold the corer with the socketed end uppermost, and by a quick arcuate motion to cause the core to be ejected by centrifugal force.

For purpose of finish, the metal above the tongue 6 may be extended circumferentially into overlapping relation with the opposite side of the hollow cylinder 3 and the parts secured together to the handle by a nail or screw 12. Any equivalent means of attachment may be employed without transcending the scope of the invention.

The illustrated embodiment of the invention shows the tongue 6 terminating substantially flush with the inner end of the handle 1. This is simply a matter of choice, for if desired, the tongue 6 may be made shorter or longer than here shown. If made longer, the upper portion would be housed in a radial slot in the lower end of the handle 1 and thus serve as an additional means for preventing the rotation of the hollow cylinder relatively to the handle.

While I have in the above disclosure described a preferred and practical form of the invention, it is to be understood that the details of construction are merely by way of example and subject to such variations and departures as may be in the future, found necessary or desirable.

What I claim is:

1. Corer for citrus fruits comprising a cylin- 2. Corer for citrus fruits comprising a cylindrical socket member including a handle, the end of said socket member opposite said handle having a cutting edge, and a tongue extending inwardly from said socket member having the inner edge inclined from a point adjacent the periphery of the end of said socket member having the cutting edge toward the axis of said socket member, the latter being provided with a longitudinal slot on one side opening at the periphery of the end having the cutting edge.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3127939 *Dec 18, 1961Apr 7, 1964Edward A SokolskiLawn trimmer
US4649918 *Jun 18, 1982Mar 17, 1987Custom Medical Devices, Inc.Bone core removing tool
US4689885 *May 30, 1986Sep 1, 1987Albanese Thomas CApparatus for cutting out a face in a pumpkin
US4873991 *Sep 21, 1988Oct 17, 1989Skinner Bruce A JBiopsy needle
US4903407 *Apr 21, 1988Feb 27, 1990Gerard FischerDevice for making vegetable and/or fruit cases for filling
US4903709 *Jun 21, 1989Feb 27, 1990Skinner Bruce A JBiopsy method
US6052910 *Mar 9, 1998Apr 25, 2000Kaebisch, Jr.; Jerald WilliamVegetable cutting device
WO2004045348A1 *Nov 13, 2003Jun 3, 2004George MauroFruit coring device for producing a closed bore
U.S. Classification30/113.1, 30/316, 30/301, 30/315
International ClassificationA47J25/00
Cooperative ClassificationA47J25/00
European ClassificationA47J25/00