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.

Patents

  1. Advanced Patent Search
Publication numberUS3107426 A
Publication typeGrant
Publication dateOct 22, 1963
Filing dateMar 22, 1961
Priority dateMar 22, 1961
Publication numberUS 3107426 A, US 3107426A, US-A-3107426, US3107426 A, US3107426A
InventorsRobinson Jr Walter H
Original AssigneeStanley Works
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Utility knife
US 3107426 A
Abstract  available in
Images(2)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Oct. 22, 1963 w. H. ROBINSON, JR 3,107,426

UTILITY KNIFE Filed March 22, 1961 2 Sheets-Sheet l a lflZ/i 50 70 71:1 80 7; 66 82 5 36 'INVENTOR. I 96 WALTER H. ROBINSON,JR

A 7' TORNE Y8 Oct. 22, 1963 w. H. ROBINSON, JR 3,107,426

. UTILITY KNIFE Filed March 22. 1961 2 Sheets-Sheet 2 IN V EN TOR.

WALTER H. ROBINSON ,JR.

United States Patent to The Stanley Works, New Britain, Conn., a corporation of Connecticut Filed Mar. 22, 1961, Ser. No. 97,622 6 Claims. ({Il. 30-162) This invention relates to knives and more particularly to a utility knife in which the knife blade can be slideably moved between a safety position within the knife handle and an extended cutting position.

It is an object of this invention to provide an improved utility knife of the type described in which the knife blade can be readily installed and is thereafter rigidly supported in any adjusted position, and which incorporates an improved blade adjustment means that is easily operated for extending, retracting and locking the knife blade in a selected position.

It is another object of this invention to provide a utility knife of the type described which can be simply and economically constructed, which has a minimum number of parts and which can be easily assembled and operated with safety and reliability.

It is a further object of this invention to provide a utility knife of the type described having a blade that can be economically manufactured and easily sharpened and which can be conveniently mounted within the knife handle for slideably extending either end of the blade from the handle.

Other objects will be in part obvious and in part pointed out more in detail hereinafter.

The invention accordingly consists in the feature of construction, combination of elements and arrangement of parts which wil be exemplified in the construction hereafter set forth and the scope of the application which will be indicated in the appended claims.

In the drawings:

FIG. 1 is a perspective view of an embodiment of the utility knife of this invention;

FIG. 2 is a side elevation view of the utility knife of FIG. 1 with half of the knife handle removed and the knife blade shown in phantom in the fully extended position;

FIG. 3 is a portion of the view of FIG. 2 with the blade shown in bold lines in a partially extended position;

FIG. 4 is a portion of the view of FIG. 2 with the blade shown in bold lines in a retracted or safety position;

FIG. 5 is a transverse cross section view taken substantialy along the line 55 of FIG. 2;

FIG. 6 is a side elevation view of the half of the knife handle removed in FIG. 2;

FIG. 7 is an enlarged transverse cross section view taken substantially along the line 77 of FIG. 2; and

FIG. 8 is an enlarged fragmentary section view taken substantially along the line 88 of FIG. 3 with the knife I blade removed.

Referring to the drawings more in detail, the utility knife of this invention, generally denoted by the numeral 10, has an elongated handle 12 composed of two handle members or halves 14, 16 that have contiguous peripheral faces 18 and 20 lying in a plane extending rearwardly from a blade-receiving slot opening 21. The handle half 14, as shown in FIG. 2, additionally has an outwardly extending flange or ridge 22 that surrounds a recess 24 adapted for storing extra blades 26, and which extends within a similar storage recess 27 in the other handle half 16 (FIG. 6) to prevent relative movement of the handle member when they are assembled and secured by a retaining screw 30. To provide a means for holding the utility knife when it is not in use, the hous- "ice ing halves 14, 16 are provided with aligned apertures 32, 34 that can be used to retain the knife upon a hook or the like or for receiving a ring or similar type fastening means.

Referring to FIGS. 2 and 7, the knife blade 36 is supported for reciprocable movement within the handle 12 by a blade carrier 40 having a base portion 41 slideably mounted upon elongated ridges or lands 42, 44 and 46 that are preferably integrally cast with the handle half 14. Additionally, the carrier 40 has integral flanges 47, 48 and 50 extending substantially perpendicular from the base and which are adapted to slidingly engage parallel shoulders 53 and 54 formed between the peripheral face .18 and the lands 42 and 46, respectively. These flanges 47, 48 and 54 as seen in FIGS. 7 and 8, also extend Within the handle member 16 for sliding engagement with similar parallel shoulders 49, 51 formed thereon adjacent the peripheral face 20. To retain the carrier 40 within the handle member 14, and to additionally assist in controlling the sliding movement of the carrier 46 within the handle, the carrier is provided with an elongated upset outwardly extending portion 52 that is adapted to slidingly engage the shoulder 55 formed by the elongated land 44. The upset portion 52 additionally has an elongated slot 60 receiving a pin 62 that is fixed to the handle member 14 and which has an enlarged head to retain the carrier upon the handle member 14.

Extending rearwardly from and forming an integral extension of the carrier flange 56 is an elongated locking ,tongue 64 that is adapted for flexible movement relative to the flange 5i and which is formed to cause it to resiliently bias or engage the locking cam surfaces or edges 66, 68 on the housing members 14 and 16, respectively. To move the locking tongue 64 away from the cam surfaces 66, 68 and against the resilient bias of the tongue 64, there is provided a button or operating member 70 with a shank 72 both of which are slideably movable within the recesses 74 and 76, respectively, in each handle member 14, 16 and which are fixed to the resilient looking tongue 64 by upsetting the end of the shank 72.

To adjustably lock the knife blade 36 against rearward movement from the fully extended position shown in phantom in FIG. 2, from the partially extended posi tion shown in FIG. 3, and from a safety or retracted position shown in FIG. 4, the locking tongue 64 is provided With an upwardly and outwardly extending end 78 that is engageable with rearwardly tapered surfaces 86, 82 and 84 on the handle member 14 and similar tapered surfaces 86, $8 and 9% on the handle member 16 which form portions of the cam edges 66, 63, respectively. By depressing the button 70, the end 78 of the locking tongue 64 is moved out of engagement with the cam edges 66, 63 and the carrier 4% and its blade 36 can be adjusted by sliding the button 70 within the recess 74 to a desired position. Releasing the button 70 allows re-engagement of the locking tongue end 78 with the cam edges 66, 68.

When the blade is in the intermediate or partially extended position shown in FIG. 3, the carrier 40 and its blade are prevented from being inadvertently moved forwardly or outwardly by an abutment edge 92 on the handle member 16, as the abutment edge :92 is adapted to engage an enlarged portion 94 on the locking tongue '64 when the carrier and blade are in the partially retracted position; however, when the button isdepressed, the engagement between the enlarged portion 94 and theedge 92 is released, and the carrier may be slideably positioned as previously described. When in the fully extended position, the carrier is prevented from'moving outwardly by an engagement between the forward edge 95 (FIG. 2) of the carrier and a shoulder 97 on the handle member 14.

The blade 36 is shown to be substantially flat with a lower cutting edge 96 and inwardly tapered ends 98 and 160. The blade 36 is retained upon the carrier 40 by an upset portion or tang 102 on the carrier cooperating with a cutout portion 194 on the blade 36, and by the snug engagement of the upper and lower parallel edges of the blade 36 with the carrier flanges 47, 48 and 50. As the handle members 14, 16 are easily separated, the blade 36 is readily accessible and can be easily removed and replaced by merely lifting it from the carrier. Additionally, the blade 36 is constructed so that it can be conveniently reversed for using the other end of the cutting edge 96, whereupon a second cutout portion 106 is adapted to be engaged by the carrier upset portion or tang 102. Of course, a greater number of blade cutout portions could be provided for increasing the number of positions the blade could be installed upon the carrier, or only a single cutout portion could be used for cooperating with the tang 102 when the blade is in either of its reversed positions.

In order to securely retain the blade 36 and the carrier 40 within the handle, two elongated lands 110 and 112 terminating in a connecting web 114 are provided on the handle member 16, and a similar web 116 is provided on the handle member 14, all of which are adapted to engage the blade surface and thereby laterally support the blade and carrier within the handle 12. Additionally, parallel shoulders 118 and 120 formed on the handle member 14 between the peripheral face 18 and the web 116 are adapted to slidingly engage the parallel edges of the blade when it is extended for providing supporting bearing surfaces therefor.

It can be seen, therefore, that the utility knife of this invention has a simple construction which can be economically manufactured using well-known mass production manufacturing processes including casting and stamping and which can be easily assembled and readily adjusted for safely and reliably positioning the blade to a selected position.

As will be apparent to persons skilled in the art, various modifications and adaptations of the structure above described will become readily apparent without departure from the spirit and scope of the invention, the scope of which is defined in the appended claims.

I claim:

1. A knife comprising; an elongated handle having a blade-receiving slot opening at one end thereof, said handle having two elongated members detachably secured and separable along a longitudinal plane extending rearwardly from the slot opening, a carrier reciprocably mounted on one of said elongated members for movement toward and away from said slot opening, said carrier having a base portion extending substantially in a plane parallel to said longitudinal plane and opposed side flanges extending in parallel directions from the base on one side thereof, the one elongated member having opposed elongated parallel extending shoulder slidingly engaging said carrier flanges for supporting the carrier for reciprocable movement on the said one elongated member, a blade supported on said carrier base and having parallel edges engaging the said flanges, said opposed parallel flanges being configured to allow assembly of the blade on the carrier laterally of the direction of movement thereof when the two elongated members are separated, means detachably retaining the blade upon the carrier, said carrier having integrally therewith a rearwardly extending elongated tongue adapted for flexible resilient movement in said longitudinal plane, a locking cam surface on the handle defining a plurality of locking abutments that are selectively engageable by the flexible tongue for adjustably retaining the carrier and blade in a selected position, a button fixed to said tongue and adapted for manual engagement for flexibly moving the tongue out of engagement with the cam surface and for slidably reciprocating the carrier within the handle.

2. A knife comprising; an elongated handle having a blade-receiving slot opening at one end thereof, said handle having two elongated members detachably secured and separable along a longitudinal plane extending rearwardly of the slot opening, a carrier reciprocably mounted on one of said elongated members for movement toward and away from said slot opening, said carrier having a base portion and opposed side flanges extending in parallel directions from the base on one side thereof, the one elongated member having opposed elongated parallel extending shoulders slidingly engaging said carrier flanges for supoprting the carrier for reciprocable movement on the said one elongated member, said carrier further having an upset portion extending outwardly from the base on the opposite side from the flanges, a carrier retaining element fixed to said one elongated member, an elongated slot in said upset portion slidably receiving said retaining element, said retaining element having an enlarged head engaging the upset portion for retaining the carrier upon the one elongated member, a blade supported on said carrier base and having parallel edges engaging the said flanges, means detachably retaining the blade upon the carrier, said carrier having rearwardly extending therefrom an integral elongated tongue adapted for flexible movement in the said longitudinal plane, a locking cam surface on the handle defining a plurality of locking abutments that are selectively engageable by the flexible tongue for adjustably retaining the carrier and blade in a selected position, an operating member fixed to said tongue and adapted for manual engagement for flexibly moving the tongue out of engagement with the cam surface and for reciprocating the carrier within the handle.

3. A knife comprising; an elongated handle having a blade receiving slot opening at one end thereof, said handle comprising two elongated members detachably secured and separable along a longitudinal plane extending rearwardly from the said slot opening, a carrier reciprocably mounted on one of said elongated members for movement toward and away from said slot opening, said carrier having a base portion and two opposed parallel flanges extending substantially perpendicular from the base on one side therof, the one elongated member having opposed elongated parallel shoulders slidingly engaging said carrier flanges for supporting the carrier for reciprocable movement on the said one elongated member, said carrier further having an upset portion extending from the base on the opposite side from the flanges, a carrier retaining element fixed to said one elongated member and an elongated slot in said upset portion slidably receiving the retaining element, said retaining element having an enlarged head engaging the upset portion for retaining the carrier upon the one elongated member, a substantially flat blade supported on said carrier base and having parallel edges engaging the said flanges, said blade having a cutout portion, said carrier having a tang engaging said cutout portion for retaining the blade upon the carrier, and manually adjustable means for selectively moving and locking the carrier.

4. A knife comprising; an elongated handle having a slot opening at one end thereof, said handle comprising two elongated handle members separable along an elongated plane extending rearwardly of the slot opening, a screw detachably securing said handle members, one of said handle members having a plurality of elongated lands and a pair of parallel opposed elongated shoulders extending rearwardly of said opening, a carrier having a base portion slideably mounted upon said lands and having two opposed parallel flanges extending from one side thereof and slideably engaging the said opposed shoulders, said base portion having an elongated slot, a carrier retaining element fixed to the one handle member and slidably received within the elongated slot, said retaining element having an enlarged end engaging said base portion for retaining the carrier upon said one handle member, said carrier having an upset tang, a substantially fiat blade supported on said base portion and having parallel edges engaging the carrier flanges for support thereby, said blade having a cutout portion receiving the upset tang for retaining the blade upon the carrier, said carrier having a rearwardly extending integral tongue having resiliency in the said elongated plane, a locking cam surface on the handle defining a plurality of locking abutments, said tongue having an upwardly turned end resiliently biased into engagement with the cam surface for locking the oarrier against movement within the handle, a button fixed to said tongue and adapted for manual actuation for releasing the engagement of the tongue with the cam surface and for moving the carrier within the handle, the other handle member having an abutment adapted for engagement by an enlarged portion on the tongue when the tongue is in engagement with one of said locking abu-trnents for preventing inadvertent movement of the carrier toward the said opening, and an elongated land on said other handle member engaging the surface of the blade opposite the said carrier base portion for laterally retaining the blade on the carrier.

5. A blade holder comprising an elongated handle having a blade-receiving slot opening at one end thereof, said handle having two elongated members detachably secured and separable along a longitudinal plane extending rearwardly of the slot opening, a blade carrier reciprocably mounted on one of said elongated members for movement toward and away from said slot opening, said carrier having a base extending substantially in a plane parallel to said longitudinal plane, said carrier further having an integral longitudinal flange extending substantially perpendicular to the base for engaging the edge of a blade to be mounted on the carrier, said integral flange further providing a resilient elongated portion extending rearwardly to provide a free end forming a resilient catch movable in said longitudinal plane, a locking cam surface on the handle for engaging the catch provided by the elongated portion of the flange, said catch being inherently biased into engagement with the cam surface by the resiliency thereof, and an operating member fixed to said elongated portion and adapted for moving the catch out of engagement with the locking cam surface and for moving the carrier within the handle.

6. A knife comprising an elongated handle having a blade-receiving slot opening at one end thereof, said handle having two elongated members detachably secured and separable along a longitudinal plane extending rearwardly of the slot opening, a carrier reciprocably mounted on one of said elongated members for movement toward and away from said slot opening, said carrier having a base extending substantially in a plane parallel to said longitudinal plane, said carrier further having opposed longitudinal side flanges extending in parallel directions from the base on one side thereof, the elongated handle having opposed elongated parallel extending shoulders slidingly engaging said carrier flanges for supporting the carrier for reciprocable movement within said handle, a blade supported on said carrier base having parallel edges engaging the carrier flanges, said carrier flanges being configured to allow removal of the blade from the carrier laterally of the direction of movement thereof when the two elongated members are separated, and a manually adjustable operating member adapted for moving the carrier within the handle.

References Cited in the file of this patent UNITED STATES PATENTS 2,291,514 Warner et a1. July 28, 1942 2,336,284 Nelson Dec. 7, 1943 2,632,244 Belsky Mar. 24, 1953 2,948,961 Ortner Aug. 16, 1960 3,063,147 Paperelli Nov. 13, 1962

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2291514 *May 5, 1939Jul 28, 1942Warner Mfg CoHand scraper
US2336284 *Mar 24, 1941Dec 7, 1943Jennings NelsonRazor blade holder
US2632244 *Feb 16, 1949Mar 24, 1953Charles BelskyToolholder
US2948961 *Jul 21, 1959Aug 16, 1960Samuel OrtnerPush button knife
US3063147 *Jul 1, 1959Nov 13, 1962Kastar IncAdjustable tool
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3171201 *Sep 3, 1963Mar 2, 1965Ralph CarifiRazor blade holders
US3192624 *Oct 30, 1963Jul 6, 1965Allway Mfg Co IncKnife handle with adjustable blade
US3316635 *May 6, 1964May 2, 1967Stanley WorksScoring knife
US3439419 *Dec 1, 1967Apr 22, 1969Sterling Plastics CoKnife with slidable blade sheathed and selectively clampable in handle
US3660896 *Apr 10, 1970May 9, 1972Umholtz Franklyn GUtility knife
US3872591 *Nov 19, 1973Mar 25, 1975Quenot MichelKnife handle
US3888002 *May 9, 1974Jun 10, 1975Stanley WorksUtility knife
US3927473 *Apr 18, 1974Dec 23, 1975Philip Morris IncReplaceable blade knife
US4028758 *Sep 22, 1975Jun 14, 1977Connor John J OCombination utility knife and staple remover
US4170062 *Jul 6, 1978Oct 9, 1979Kai Cutlery Center Co., Ltd.Extensible knife with blade position adjustment
US4347766 *Mar 11, 1981Sep 7, 1982Hans HeinleinSharpener for steel edges of skis
US4586256 *Jan 7, 1985May 6, 1986The Stanley WorksKnife handle
US4621425 *Oct 5, 1984Nov 11, 1986Stanley WorksRetractable knife handle
US4635309 *May 17, 1985Jan 13, 1987Larsen Peter LMultiple use hand tool
US4920646 *Apr 5, 1988May 1, 1990Grant Jerry LReplaceable adjustment mechanism
US4974320 *Jun 27, 1989Dec 4, 1990Pelletier Peter DRotatable utility knife
US5509205 *Jan 30, 1995Apr 23, 1996Millers Falls Tool CompanyUtility knife having blade retention feature
US5689889 *Aug 28, 1996Nov 25, 1997Overholt; Steven D.Knife with replaceable cutting element
US6233830May 7, 1999May 22, 2001General Housewares CorporationUtility knife handle
US6574868Mar 1, 2000Jun 10, 2003Steven D OverholtKnife with replaceable cutting element
US6832438Jun 5, 2001Dec 21, 2004Allway Tools, Inc.Utility knife with quick release housing
US7131204Nov 9, 2004Nov 7, 2006Irwin Industrial Tool CompanyUtility knife with actuator for moving blade carrier and for releasing blade therefrom, and related method
US7178244 *Sep 12, 2005Feb 20, 2007Avello LlcPowered utility knife
US7316070Nov 15, 2005Jan 8, 2008Irwin Industrial Tool CompanySelf-retracting utility knife
US7346988Sep 11, 2002Mar 25, 2008Allway Tools, Inc.Soft handle non-retractable utility knife with quick release latch and method for making same
US7565747Feb 13, 2006Jul 28, 2009Cobb Noel CDouble-edged utility knife
US7658129Mar 3, 2004Feb 9, 2010Irwin Industrial Tool CompanyMethod of making a composite utility blade
US7774942Oct 9, 2006Aug 17, 2010Pacific Handy Cutter, Inc.Utility knife
US7930830May 8, 2006Apr 26, 2011Allway Tools, Inc.Scraper with sliding safety guard
US8099871May 29, 2009Jan 24, 2012Edward BilenskiTransverse angulated utility knife
US8234790Aug 16, 2010Aug 7, 2012Pacific Handy Cutter, Inc.Utility knife
US8291602Jul 24, 2002Oct 23, 2012Irwin Industrial Tool CompanyComposite utility knife blade, and method of making such a blade
US8353109Apr 14, 2009Jan 15, 2013Martor KgKnife
US8375588Apr 27, 2009Feb 19, 2013Allway Tools, Inc.Automatically retracting safety carton cutter
US8857064Nov 3, 2006Oct 14, 2014Pacific Handy Cutter, Inc.Safety cutter apparatus
US8938883Jan 11, 2011Jan 27, 2015Allway Tools, Inc.Cutting implements
US9126259Feb 8, 2010Sep 8, 2015American Saw & Mfg. CompanyMethods of making utility knife blades
US20030019332 *Jul 24, 2002Jan 30, 2003Korb William B.Composite utility knife blade, and method of making such a blade
US20040045167 *Sep 11, 2002Mar 11, 2004Donald GringerSoft handle non-retractable utility knife with quick release latch and method for making same
US20040168326 *Mar 3, 2004Sep 2, 2004Korb William B.Method of making a composite utility blade
US20050097756 *Dec 16, 2004May 12, 2005Donald GringerUtility knife with quick release housing
US20050188541 *Nov 9, 2004Sep 1, 2005Brown Donald A.Utility knife with actuator for moving blade carrier and for releasing blade therefrom, and related method
US20050223567 *Apr 9, 2004Oct 13, 2005Cobb Noel CUtility knife for glaziers
US20060123637 *Feb 13, 2006Jun 15, 2006Cobb Noel CDouble-edged utility knife
US20070068003 *Nov 3, 2006Mar 29, 2007Schmidt G GSafety Cutter Apparatus and System
US20070107232 *Nov 15, 2005May 17, 2007Irwin Industrial Tool CompanySelf-retracting utility knife
US20070204471 *Jan 9, 2007Sep 6, 2007Castagna Matthew IKnife with disposable and interchangeable blade
US20070256306 *May 8, 2006Nov 8, 2007Donald GringerScraper with sliding safety guard
US20080083119 *Oct 9, 2006Apr 10, 2008Schmidt G GerryUtility Knife
US20090255129 *Apr 15, 2008Oct 15, 2009Donald GringerMultifunction carton tray cutter
US20090260235 *Apr 14, 2009Oct 22, 2009Martor KgKnife
US20100117262 *Nov 13, 2008May 13, 2010Donald GringerMethod of dual molding products with logos and other indicia
US20100263491 *Feb 8, 2010Oct 21, 2010Korb William BMethod of Making a Composite Utility Blade
US20100269348 *Apr 27, 2009Oct 28, 2010Donald GringerAutomatically retracting safety carton cutter
US20100311230 *Aug 19, 2010Dec 9, 2010Mitsubishi Electric CorporationSemiconductor device and method of fabricating the same
US20110167646 *Aug 16, 2010Jul 14, 2011Schmidt G GerryUtility Knife
US20110167647 *Jan 11, 2011Jul 14, 2011Donald GringerCutting implements
USD618981Oct 12, 2009Jul 6, 2010Allway Tools, Inc.Tool handle
USD660675Jun 9, 2011May 29, 2012Allway Tools, Inc.Twin blade head for a knife
USD779143Apr 25, 2014Feb 14, 2017Unger Marketing International, LlcWindow scraper
DE1269009B *May 6, 1965May 22, 1968Stanley WorksSchneidmesser und Klinge fuer dieses
DE1274467B *May 6, 1965Aug 1, 1968Stanley WorksSchneidmesser mit einem Aufbewahrungsgriff
EP0178040A1 *Jun 17, 1985Apr 16, 1986The Stanley WorksRetractable knife handle
WO2008058038A2 *Nov 2, 2007May 15, 2008Pacific Handy Cutter, Inc.Safety cutter apparatus and system
WO2008058038A3 *Nov 2, 2007Apr 9, 2009Pacific Handy Cutter IncSafety cutter apparatus and system
Classifications
U.S. Classification30/162, 30/125
International ClassificationB26B5/00
Cooperative ClassificationB26B5/001
European ClassificationB26B5/00A