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 numberUS1374289 A
Publication typeGrant
Publication dateApr 12, 1921
Filing dateJan 28, 1919
Priority dateJan 28, 1919
Publication numberUS 1374289 A, US 1374289A, US-A-1374289, US1374289 A, US1374289A
InventorsDunkley Samuel J
Original AssigneeDunkley Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Paring and pitting knife
US 1374289 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)




1,374,289. Patented Apr-12,1921.




Specification of Letters Patent.

- Patented Apr. 12, 1921.

To all whom it may concern:

Be it known that I, SAMUEL J. DUNKLEY, a citizen of the United States, residing at Kalamazoo, Michigan, have invented certain new and useful Improvements in Paring and Pitting Knives, of which the following is a specification. v

This invention relates to an improved paring and pitting knife. The object of the invention is to provide an improved oscillatory cutting knife for the pitting and paring of fruit.

Objects of the invention pertaining to details and economiesof construction and operation will definitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and means described in the following specification. The invention is clearly defined and pointed out in the claim.

A structure which is a preferred embodiment of my invention is fully illustrated in the accompanying drawing, forming a part of this specification, in which:

Figure I is a longitudinal detail sectional view through a paring and pitting knife structure embodying the details of my invention, some of the parts being shown in full lines.

Fig. II is a detail transverse sectional view on the line 2-2 of Fig. I.

Fig. III is a detail transverse sectional view on line 33 of Fig'. I. r

Fig. IV is a detail view of a straightedged knife with a guard.

Fig. V is a transverse detail sectional view of the knife, taken on line 5-5 of Fig. IV.

Fig. VI is an enlarged detail view of a portion of the blade 11 showing its serrations. 1 In the drawing similar numbers of reference refer to similarparts throughout the several views, and the sectional views are taken looking in the direction of the little arrows at the ends of the section lines.

Considering the numbered parts of the drawing, 1 is the handle for the tool. Axially disposed in the end of this handle is a slide 2 having a stem 3 which extends through the bracket 4 into a bearing 5 at the opposite end. This slide is provided with collars 6, 6 on its stem and is caused to reciprocate by rotation of the shaft 7 which is provided with a disk 8 at its end provided with a wrist pin 9 which extends into and engages between the collars 6, 6. When the the shaft 7 is revolved, the action of thepin 9 between the collars 6, 6 causes the reciprocation. The shaft 7 is provided with suitable connection 10 to ,a flexible shaft or other suitable driving means.

(In the reciprocating slide 2 is supported the curved knife 11 which is provided with a straight shank 12 and is retained in a socketfinthe end of the slide 2 by set screw 13. The edge of this knife is serrated. The shaft? is caused to revolve, preferably, at the rate of about 1800 revolutions per minute, so that the knife 11 vibrates very rapidly. It is found that this is a very effective device for removing pits and'cores from fruit and for any purpose of that kind. By substituting the straight knife 14 with a guard 15, the knife is very effective for the peeling of pears or of any hard fruit, as green peaches and the like, or for any use where a straight knife is needed. The reciprocation greatly enhances the cutting quality. The knife has the effect of seeming to be very sharp. I

I have thus described the preferred means for inducing the reciprocation, but it is very clear that various means might be provided for the purpose and I wish to claim my invention broadly as well as specifically, as indicated in the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is: I

In a parin and pitting knife, the combination of a andle, a slide axially disposed within the handle and a means to reciprocate the slide, and a curved knife axially disposed to said handle and carried by said slide and adapted to be reciprocated thereby,

as specified.

In witness whereof, I have hereunto set my hand and seal in the presence of two I witnesses. 7 SAMUEL J. DUNKLEY.


[ L. s.] I

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2958355 *Oct 24, 1957Nov 1, 1960Young Everett CPotato peeler
US4885182 *Jun 3, 1988Dec 5, 1989The Proctor & Gamble CompanyMethod of and apparatus for extracting juice and meat from a fruit
US4937088 *Dec 29, 1988Jun 26, 1990The Procter & Gamble CompanyMethod of and apparatus for extracting juice and meat from a fruit
US5937524 *Oct 14, 1997Aug 17, 1999Hornsby; ColbyTool for cutting melon from rind
US6629980 *Nov 28, 2000Oct 7, 2003The Regents Of The University Of MichiganInstrument and method for creating an intraocular incision
US7020968 *Sep 18, 2003Apr 4, 2006Abdel-Dayem Bassam AFruit and vegetable coring machine
US8567309 *Jul 7, 2010Oct 29, 2013Christopher L. HawkerHand tool for stuffing pitted or cored produce
US20110011280 *Jul 7, 2010Jan 20, 2011Hawker Christopher LHand tool for stuffing pitted or cored produce
DE1214899B *Jun 16, 1962Apr 21, 1966Crown Cork & Seal CoVorrichtung zum Fuehren und Spannen eines Bandes, das als durchsichtiges Fenster eine optische Messeinrichtung gegen Verunreinigungen schuetzt
U.S. Classification30/113.1, 30/272.1, 144/33, 99/562, 99/593
International ClassificationA47J23/00
Cooperative ClassificationA47J23/00
European ClassificationA47J23/00