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 numberUS3845554 A
Publication typeGrant
Publication dateNov 5, 1974
Filing dateApr 19, 1973
Priority dateApr 19, 1973
Publication numberUS 3845554 A, US 3845554A, US-A-3845554, US3845554 A, US3845554A
InventorsJoanis N, Lavoie R
Original AssigneeJoanis N, Lavoie R
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Knife blade and handle
US 3845554 A
Abstract
A flat sheet steel knife blade is provided with three equidistantly spaced openings. Two of these openings permit the blade to be used in one, or a reversed position, in a holder made up of two separable mating parts. These handle parts need not be separated in order to remove the blade for reversing or replacement. A leaf spring mounted in the holder has projecting pins which are adapted to enter the two blade openings in the blade, said leaf spring being manually movable between a blade clamping and a blade release position.
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

llite States Patent 1191 ,Hoanis et a1.

[54] KNIFE BLADE AND HANDLE [76] Inventors: Norman R. Joanis, 22 Westwood Dr.; Raymond R. Lavoie, 28 Westwood Dr,, both of Wethersfield, Conn. 06604 [22] Filed: Apr. 19, 1973 [21] Appl. No.: 352,407

[52] US. Cl 30/125, 30/330, 30/339 [51] Int. Cl. B26b 5/00, B25g 1/08 [58] Field of Search 30/125, 293, 320, 321, 30/339, 338, 330, 337, 335, 336

[56] References Cited UNITED STATES PATENTS 2,437,928 3/1948 Bennett..; 30/338 2,605,545 8/1952 Weems r 30/337 2,707,551 5/1955 Shnitzler 206/16 B 2,870,537 1/1959 Ortner 30/320 X Primary Examiner-Al Lawrence Smith Assistant Examiner-J. C. Peters 'Attorney, Agent, or FirmMcCormick, Paulding &

Huber [57] ABSTRACT 'ing pins which are adapted to enter the two blade openings in the blade, said leaf spring being manually movable between a blade clamping and a blade release position.

8 Claims, 4 Drawing Figures KNIFE BLADE AND HANDLE SUMMARY OF THE INVENTION This invention relates generally to utility knife blades and holders therefore, and deals more particularly with a utility knife of the type used by craftsman or tradesman to sever and install various types of floor coverings, wall materials such as sheet rock and other sheet materials.

A primary object of the present invention is to provide an improved knife blade and holder which will permit the blade to be removed and reversed or replaced without separating the mating handle parts or halves.

Another object of the present invention is to provide a holder which will permit a plurality of knife blades to be stored for easy access, again without separating the handle halves.

Still another object of the present invention is to provide an improved knife'blade suitable for use in a holder of the foregoing type, .which blade can be readily reversed to permit the use of opposite cutting edges defined thereon. a

A still further object of the present invention is to provide an improved knife blade and holder which holder has an attractive low profile appearance, is of a simplified yet durable construction, and which is economical to manufacture and assemble.

The essential elements of the present invention comprise two mating handle parts, or halves, one of which has an internal blade clamping compartment, and the other of which parts has an internal receptacle for receiving a blade engaging portion of a leaf type spring. The leaf spring is adapted to have its blade engaging portion overlie the compartment in which the blade is adapted to be retained, and manual button means is provided external to the mating handle parts for moving the spring from its clamping to its release position. Biasing means is provided for urging the blade engaging spring portion toward its blade clamping position. Preferably, the spring includes projecting pins which are adapted to be received in two of three openings provided for this-purpose in the blade, and as such, the blade can be conveniently removed and reversed or replaced without the necessity for separating the mating handle parts or halves.

BRIEF DESCRIPTION OF THE DRAWINGS 3-3 of FIG. I.

FIG. dis a detailed view of a portion of the handle of FIG. 3 with the leaf spring being shown in its deformed position suitable for release of the blade.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Turning now to the drawing in greater detail, FIGS. I and 2 show the mating handle parts or halves I and 12 respectively, which parts cooperate to define a grip portion adapted to be held in the hand of the user, and a somewhat smaller nose portion adapted to receive a blade B. These mating handle parts 10 and 12 are separably joined one to the other, preferably by means of a pair of mounting screws, l4, 14. While one such screw might be used for this purpose, two such screws are preferably employed, and at the end of the grip portion of these handle parts a projecting pin 16 on the upper part 10 is adapted to be received at a suitable mating recess defined for it in the lower part 12 as best shown in FIG. 3.

These mating handle parts 10 and 12 can be seen from FIG. 3 to cooperate with one another to define a blade storage compartment 18 in which a plurality of blades B, B are adapted to be stored for future use. Biasing means is provided in this storage compartment 18 for urging all of these blades toward a finger opening 20, and preferably said biasing means comprises a generally U-shaped spring element 22 which carries a blade backing plate 24 somewhat larger than the size of the finger opening 20 in order to avoid loss of the U- shaped spring element 22 when all of the blades B, B are exhausted. Each of the blades B, B is fabricated from sheet steel stock, and has a regular shape so that the uppermost blade B in FIG. 3 can be moved or withdrawn rearwardly through a slot 27 provided for this purpose in the upper handle part 10. As so constructed and arranged, the user of the improved blade holder described and claimed herein can conveniently remove one blade from the storage compartment without the necessity for separating the handle parts I0 and 12. This advantage to the present holder construction will be even more apparent in connection with the descriptionof the blade retaining nose portion (to be described) which portion is so designed as to permit removal and replacement of the active blade, again without the necessity for separating the handle parts.

As best shown in FIG. 3, the lower handle part 12 includes a blade clamping compartment 30 in which a blade B is adapted to be securely held by a leaf spring 32, and its associated pins 34 and 36. The blade clamping compartment 30 is preferably of rectangular contour, as best shown in FIG. 2, so as to accommodate blades of various regular shape. Preferably, however, the blade B is generally trapezoidal in shape and includes three openings 34a, 36a and 34b. The cutting edge or tip of the blade B carries reference numeral 38 but it will be apparent that the oppositely arranged cutting edge 40 is symmetrically configured so as to permit removal and reversing of the blade B. Still with reference to the construction of the blade B, it is noted that although the longer edge of the trapezoidally shaped blade is shown as relieved to define a cutting edge 39, it will be apparent that the shorter symmetrically arranged edges 37 and 41 might instead be relieved in the fabrication of the blade to define symmetrically arranged cutting edges at 37 and 41. Other blade shaped might be fabricated for use in a holder of the present invention, and the essential features of a blade constructed according to the present invention will be defined herein below.

Still with reference to FIG. 3, the upper handle part 10 defines an internal spring receptacle 50 for receiving the blade engaging portion of the leaf spring 32 when said leaf spring is deformed from the FIG. 3, or normal position, to the FIG. 4, or blade release position. In the release position of FIG. 4, it will be apparent that the blade B can be manually withdrawn from the blade clamping compartment 30 without the necessity for separating the handle parts and 12.

Turning now to a more detailed description of the operation for the leaf spring 32, the inner portion of said spring 32 defines a manually operated means in the form of a button 60, which button projects through an opening provided for this purpose in the upper handle part 10. The button 60 is conveniently accessible for operation by the thumb of the user. The leaf spring 32 preferably has a shape such that manually depressing the button 60 as shown in FIG. 4 causes the leaf spring 32 to assume a shape whereby the pins 34 and 36 are withdrawn from the openings 34a and 36a in the blade B. The dimension of the internal spring receptacle 50 in the handle part 10 is such that these pins 34 and 36 will not interfere with the blade B during blade removal (HO. 4) for reversing or replacement. Although not essential to the present invention, the lower handle part 12 may include receptacles 46 and 48 for the pins 34 and 36 respectively in order to securely anchor the blade B in place when the spring 32 is in its spring retaining position as shown in FIG. 3.

Still with reference to the spring 32, it will be apparent from a comparison of FIGS. 3 and 4 that the outer or blade engaging portion of this leaf spring 32 cooperates with the inner button portion thereof to define an intermediate portion which serves as a fulcrum acting against the lower handle part 12 to achieve the necessary motion described above. Furthermore, a land 52 defined for this purpose in the upper handle part 10 assures that the leaf spring 32 is properly restrained for achieving the motion defined for in FIGS. 3 and 4 of the drawing. As mentioned above, biasing means is provided for urging the spring 32 toward its blade clamping position, and preferably said means comprises a small coil spring 54 which exerts a light spring force between the lower handle part 12 and the inner portion of the leaf spring 32. However, it should perhaps be noted that the function of this spring 54 might be conveniently provided for as a result of redesigning the inner portion of the leaf spring 32, or by utilizing equivalent biasing means such as, for example, a torsion spring provided in the space adjacent the upper surface ofthe inner portion of the leaf spring 32, i.e., opposite the coil spring 54, or by providing a tension spring in this area. It should perhaps be noted that very little biasing force is required to urge the spring 32 toward its FIG. 3 position for clamping the blade B in its associated receptacle 30. The important function of the leaf spring 32 resides in said springs capability of assuming the configuration shown in FIG. 4 whereby the blade B can be conveniently removed from its receptacle, and whereby the pins 34, 36 associated with the leaf spring 32 are raised out of the openings in the blade to allow said blade to be so removed.

Finally, and still with reference to the leaf spring 32, said spring has a non-deformed configuration of generally flat slightly Z-shape, the inner portion thereof defining said Z-shape as indicated generally at 62 in FIG. 3. This Z-shaped inner portion 62 of the leaf spring 32 is arranged in a relatively narrow recess 64 defined in the upper handle portion 10, and the lateral dimension of this recess is so chosen that the spring 32 is maintained in the orientation shown for it in FIG. 2. Thus, the lateral dimension of the recess 54 is somewhat exaggerated in FIG. 2 for clarity. but it will be apparent that this recess, together with the opening for the button 60, assures that the leaf spring 32 remains in position during removal of a blade B. The corresponding recess 66 in the lower handle part 12 may be of a corresponding dimension, but the chief function of this recess 66 is to provide space for the inner portion 62 of the leaf spring 32 when the spring is moved from and to its normal blade clamping position to and from its blade release position.

We claim:

1. A holder for a knife blade or the like and comprising in combination;

a. a pair of mating handle parts,

b. one of said parts having an internal blade clamping compartment for receiving a substantial portion of the blade,

c. a leaf spring with a blade engaging portion adapted to overlie a substantial portion of a blade located in said compartment when said spring is in a blade clamping position,

(1. said other handle part having an internal spring receptacle for receiving said blade engaging spring portion when the latter is in a blade release position,

e. said spring having an inner portion opposite said blade engaging portion, and an intermediate portion of said spring abutting said one handle part to define a fulcrum for said leaf spring, and

f. a button projecting through an opening in said other handle part for moving said inner spring portion toward said one handle part and thereby moving said blade engaging portion into said spring receptacle of said other handle part and away from the blade to permit removal of the blade.

2. A blade for the holder of claim 1 and comprising a thin flat steel element having symmetrically configured cutting ends, and said leaf spring having at least two projecting pins which enter corresponding openings in the blade to clamp said blade in its compartment, said blade having, at least, three such openings to permit said blade to be clamped in said holder in either one of two possible positions.

3. A holder as defined in claim 1 wherein said leaf spring blade engaging portion has at least two projecting pins which are adapted to enter openings in the blade when said spring is in its blade clamping position.

4. A holder as defined in claim 1 wherein said mating handle parts define a blade storage compartment, one of said handle parts having a finger opening communicating with said compartment, said one handle part further including a slot through which a blade can pass, and biasing means in said storage compartment for urging a plurality of such blades toward said finger opening.

5. A holder as defined in claim 1 wherein said spring blade engaging portion has at least two projecting pins on the side of said spring opposite said button, and a blade for said holder, said blade being flat and having symmetrically configured cutting ends, said blade having at least three openings two of which receive said spring pins when said spring is in its blade clamping position.

6. A holder as defined in claim 5 wherein said spring being normally biased toward said blade clamping position by a light spring acting between said one handle part and the inner portion of said leaf spring.

of said handle parts having a finger opening communicating with said compartment, said one handle part further including a slot through which a blade can pass, and biasing means in said storage compartment for urging a plurality of such blades toward said finger opening.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,845,554 Dated November 5, 1974 Inventor(s) Norman R. Joanis and Raymond E. Lavoie It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

In the inven tor's name, "Raymond R. Lavoie" should be --Raymond E. Lavoie--.

Signed and sealed this 14th day of January 1975.

(SEAL) Attest:

McCOY- M; mason JR. Attesting Officer C. MARSHALL DANN Commissioner of Patents USCOMMD; 15,pg

t ILS. GOVIIIIIIIIIT FIINHNG OFFICE "$9 0-366-33,

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2437928 *Jul 21, 1944Mar 16, 1948Bennett Clark FHolder for double-edged wafer type blades
US2605545 *Apr 30, 1948Aug 5, 1952Weems Joe BBlade and toolholder
US2707551 *Jul 19, 1950May 3, 1955Gillette CoPackaging of ferrous metal objects
US2870537 *Mar 14, 1958Jan 27, 1959Samuel OrtnerPocket safety knife
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3927473 *Apr 18, 1974Dec 23, 1975Philip Morris IncReplaceable blade knife
US3964162 *Jun 25, 1975Jun 22, 1976Louis M. Gerson Co., Inc.Blade scraper
US4241496 *Mar 23, 1979Dec 30, 1980Dracon IndustriesBlade storage and selectable force impact termination tool
US4408396 *Mar 15, 1982Oct 11, 1983Scholl Albert STrim knife
US4534348 *Jan 10, 1983Aug 13, 1985Moskovsky Nauchno-Issledovatelsky Institut Mirrokhirurgii GlazaInstrument for making corneal incisions
US4594781 *Jul 6, 1984Jun 17, 1986Hoffman Simon JHolder for saber saw blade
US4612707 *Mar 29, 1984Sep 23, 1986Shea Thomas MCutting and scraping device
US4662070 *Mar 24, 1986May 5, 1987Bernd ReddigFloor covering cutter
US4706385 *Feb 28, 1986Nov 17, 1987American Safety Razor CompanyOne piece razor blade holder
US4884342 *Jun 8, 1988Dec 5, 1989William J. McnamaraUtility knife
US4930220 *Mar 29, 1989Jun 5, 1990Loo George D HScalpel blade holder
US5168630 *Dec 27, 1991Dec 8, 1992Societe Anonyme Dite: Rougier-Mur-Sol Ayant Son Siege SocialBlade-carrier tool
US5323765 *Nov 23, 1992Jun 28, 1994Brown Michael GApparatus and method for endoscopic surgery
US5492156 *Mar 10, 1994Feb 20, 1996Tyton CorporationHand held tie tensioning and cut-off tool
US5697279 *Jun 13, 1996Dec 16, 1997Metabowerke Gmbh & Co.Apparatus for clamping the end of a saw blade
US5724742 *Jul 26, 1996Mar 10, 1998Black & Decker Inc.Reciprocating saw blade clamp
US5784788 *Mar 6, 1997Jul 28, 1998Reid ManufacturingCutting tool for removing a sealant surrounding a vehicle windshield
US6192589Jun 25, 1999Feb 27, 2001The Stanley WorksUtility knife
US6256889Dec 23, 1998Jul 10, 2001Michigan Tool DesignAuto glass replacement tool
US6357120Aug 14, 1999Mar 19, 2002Olympia Group, Inc.Front-loading adjustable safety utility knife with safety quick-release lock
US6446340Nov 14, 2000Sep 10, 2002Great Neck Saw Manufacturers, Inc.Utility knife
US6513246Jun 28, 2001Feb 4, 2003Great Neck Saw Manufacturers, Inc.Utility knife
US6574872May 4, 2001Jun 10, 2003The Stanley WorksUtility knife
US6688003 *Jan 22, 2002Feb 10, 2004Robert E. ScarlaUtility knife
US6915577Feb 7, 2003Jul 12, 2005Robert ScalaUtility knife blade securing device
US6971178Sep 5, 2002Dec 6, 2005The Stanley WorksReplaceable blade knife
US7107688Apr 18, 2005Sep 19, 2006Cooper Brands, Inc.Releasable blade locking mechanism for utility knife
US7124787Aug 18, 2004Oct 24, 2006Hellermanntyton CorporationPneumatic cable tie installation tool
US7174590Mar 18, 2004Feb 13, 2007Philip J QuenziHandheld multi-tool
US7305770Aug 31, 2006Dec 11, 2007Cooper Brands, Inc.Releasable blade locking mechanism for utility knife
US7360267Dec 22, 2006Apr 22, 2008Philip J QuenziHandheld multi-tool
US7389587Sep 8, 2005Jun 24, 2008Helen Of Troy LimitedUtility knife
US7500314 *Feb 15, 2006Mar 10, 2009Josef LuberHoof knife with moveably mounted blade
US7520059Aug 2, 2005Apr 21, 2009The Stanley WorksCompact utility knife
US7591451Nov 13, 2007Sep 22, 2009Hellermanntyton CorporationBundle tie tensioning clutch
US7797836Aug 2, 2005Sep 21, 2010The Stanley WorksCompact utility knife
US7874074 *Apr 6, 2007Jan 25, 2011Rodriguez-Vega Jesus MAutomobile windshield removal tool
US7930829Apr 14, 2009Apr 26, 2011Stanley Black & Decker, Inc.Compact utility knife
US8099871May 29, 2009Jan 24, 2012Edward BilenskiTransverse angulated utility knife
US8201336May 2, 2008Jun 19, 2012Olympia Tools International, Inc.Retractable utility knife
US8549755Mar 17, 2011Oct 8, 2013Stanley Black & Decker, Inc.Compact utility knife
US8621753 *Feb 4, 2009Jan 7, 2014Stanley Black & Decker, Inc.Utility knife with blade storage system
US8695221Aug 21, 2008Apr 15, 2014Wen HaoUtility knife with extended travel carriage
US8726776 *Nov 19, 2009May 20, 2014Black & Decker Inc.Table saw guard
US8793881 *Feb 4, 2009Aug 5, 2014Stanley Black & Decker, Inc.Utility knife with blade lock
US8914982 *Jan 22, 2013Dec 23, 2014Dell SkluzakQuick release utility knife blade holder
US8984755Jun 18, 2012Mar 24, 2015Olympia Tools International, Inc.Retractable utility knife
US20100058908 *Nov 19, 2009Mar 11, 2010Black & Decker Inc.Table Saw Guard
US20100180449 *Jan 15, 2010Jul 22, 2010Van Deursen Gary EAuto feed utility knife
US20110023308 *Oct 12, 2010Feb 3, 2011Qiu Jian PingFolding utility knife
EP0178040A1 *Jun 17, 1985Apr 16, 1986The Stanley WorksRetractable knife handle
WO1980002816A1 *May 29, 1980Dec 24, 1980Metka AbDevice for knife handle
WO1993002840A1 *Aug 5, 1992Feb 18, 1993Lea Lewis Tool CorpCutting blade
WO1993010704A1 *Dec 3, 1992Jun 10, 1993Michael G BrownApparatus and method for endoscopic surgery
WO2002040294A1 *Sep 18, 2001May 23, 2002Scintilla AgTool holder
WO2005099975A2 *Apr 8, 2005Oct 27, 2005Bilenski EdwardUtility knife for glaziers
Classifications
U.S. Classification30/125, 30/339, 30/330
International ClassificationB26B5/00
Cooperative ClassificationB26B5/00
European ClassificationB26B5/00