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Publication numberUS1434388 A
Publication typeGrant
Publication dateNov 7, 1922
Filing dateNov 8, 1920
Priority dateNov 8, 1920
Publication numberUS 1434388 A, US 1434388A, US-A-1434388, US1434388 A, US1434388A
InventorsHughes Joseph O
Original AssigneeHughes Joseph O
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1434388 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)






Patented Nov. 7, 11922,

' Patented Nov. I 7, 31%)22.

entree STATES retiree PATENT @FFHCE.



Application filed November 8, 1920. Serial No. 422,613.

To all whom it may concern:

Be it known that l, Josnrrr O. HUGHES, a citizen of the United States, residing at Murphysboro, in the county of Jackson and State of Illinois, have invented new and useful Improvements in Knives, of which the following is a specification.

This invention relates to knives, wherein the blade is arranged to slide within the handle and to be wholly concealed when not in use, the invention residing in the con struction, whereby the blade may be held fixed relatively to the handle in any desired position.

The nature and advantages of the invention will be better understood when the following detail description is taken in connection with the accompanying drawings, the invention residing in the construction, combination and arrangement of parts as claimed.

blade 11. The handle is formed from a single piece of material, the opposite longitudinal edges of which are folded inwardly above the body portion of the handle, the;

edges 12 being spaced apart for the major portion of their length to provide a slot 13. The folding of the edges 12 provides channels in which the blade 11 is arranged to slide, the blade being provided with a headed I stud it by means of which the blade is manipulated} The handle is preferably of a len h slightly greater than the length of the b ade so that when the latter is retracted positioned within the handle it will not pro ect therefrom to out the pocket in which the knife is carried, or the fingers of the user. Projecting from one edge of the slot adjacent one end of the handle, is a lug 1-5 which bearsagainst the opposite edge of the slot, closing the slot adjacent one end of the handle. This lug constitutes a stop for the stud 15, and consequently limits the adjustment of the blade when projected from the handle.

With a view of holding the blade in any deslred position along the length of the handle, I provide the underside of the inturned edges with a plurality of vnotches 16. A leaf spring 18 is terminally secured to the blade l7,the opposite extremity of the spring being curved in the direction of the notches 16, the curved extremity 19 normally engage mg said notches to hold the blade against movement relative to the handle. When it IS desired to project the blade from the handle, the head of the stud is depressed thus moving the curved end of the spring out of engagement with the notches. With the parts so arranged, the blade can be readtill) Wit ily adjusted in either direction and subsequent adjustment the stem is removed from the headed stud whereby the spring moves its curved extremity into engagement with the proper notch to hold the blade in its adjusted position.

A pin 20 extends transversely through the handle adjacent one end thereof, and is disposed with respect to the adjacent terminal of the knife blade to be engaged by the latter and limit the movement of the blade in one direction.

While it have shown the described what i consider the preferred embodiment of the invention, ll desire to have it understood that T do not limit myself to this exact construction, inasmuch as such changes may be resorted to when desired as fall within the sec e of what is claimed.

aving thus described my invention what if claim as new is v l. A knife comprising a handle formed from a single sheet of material having its free. edges spaced to provide a longitudinal slot, a blade arranged for sliding movement within the handle, a stud projecting from the handle through a slot form'anipulating the blade, ahead carried by the stud, cooperating means carried by the blade and handle for holding the blade in different adjusted positions and a lug projecting from one of the said longitudinal edges of the handle to close one end of the slot to limit illtl its longitudinal ed s spaced to define a slot, a knife blade sli able Within the handle, a stud carried by the blade and projectin through the slot, a head carried by the stu notches formed along one of said longitudinal edges, a leaf spring supporting the stud on said blade and having an ofi'set portion adapted to engage said notches for holding the blade in difierent adjusted positions,

meaaea means for limiting the movement of the 10 blade in one direction, and a lug projecting from one of said edges of the handle to close one end of the slot and thereby limit the movement of the blade in the opposite direction.

In testimony whereof I aflix my signature.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2548797 *Nov 20, 1946Apr 10, 1951Cons Sewing Machine & Supply CSeam ripping knife
US2608890 *Jun 10, 1948Sep 2, 1952Albert AndrewsResilient casing with slidable tool
US3044081 *Oct 26, 1959Jul 17, 1962Robinson Jr JewellPliers
US3079686 *Dec 22, 1961Mar 5, 1963Christy Earl BHandle construction for sliding blade knives
US3167861 *Nov 18, 1963Feb 2, 1965Knebel Oliver PTool
US3185483 *Jun 6, 1963May 25, 1965Klynman Leonard HGolfer's turf-repairing implement and carrier therefor
US3651571 *Dec 23, 1969Mar 28, 1972Better Cutting Tools Newport LCarpet cutter blade holder
US4005525 *Aug 29, 1975Feb 1, 1977Allway Tools Inc.Retractable cutting implement
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US4063356 *Aug 23, 1976Dec 20, 1977Plas Plugs LimitedHand knife
US4628717 *Oct 3, 1985Dec 16, 1986Blum Alvin SProtective key holder
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US6626850Mar 30, 1998Sep 30, 2003Allegiance CorporationAutomated biopsy instruments
US7604647 *Oct 22, 2004Oct 20, 2009Medical Instrument Development Laboratories, Inc.Ophthalmic cannula insertion tool and method
US8402663 *Aug 11, 2010Mar 26, 2013William J. McHenryTwo-piece hand tool
US8875405Apr 19, 2012Nov 4, 2014Oasis Medical, Inc.Micro surgical knife with safety feature
US20060089607 *Oct 22, 2004Apr 27, 2006Medical Instrument Development Laboratories, Inc.Ophthalmic cannula insertion tool and method
US20110213317 *Mar 1, 2011Sep 1, 2011Chen David E-BinCannula for intraocular surgery
US20120036721 *Aug 11, 2010Feb 16, 2012Mentor Group, L.L.C.Two-Piece Hand Tool
USD746443Oct 2, 2013Dec 29, 2015Medical Instrument Development Laboratories, Inc.Cannula insertion tool
USD773651Nov 18, 2015Dec 6, 2016Medical Instrument Development Laboratories, Inc.Cannula insertion tool
U.S. Classification30/320, 30/162, 15/184
International ClassificationB26B1/00, B26B1/08
Cooperative ClassificationB26B1/08
European ClassificationB26B1/08