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Publication numberUS2744320 A
Publication typeGrant
Publication dateMay 8, 1956
Filing dateMay 19, 1953
Priority dateMay 19, 1953
Publication numberUS 2744320 A, US 2744320A, US-A-2744320, US2744320 A, US2744320A
InventorsPalermo Vincent J
Original AssigneePalermo Vincent J
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Knife
US 2744320 A
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Description  (OCR text may contain errors)

V. J. PALERMO May 8, 1956 KNIFE 2 Sheets-Sheet l Filed May 19, 1953 BY WWW# 19m! May 8, 1956 Filed May 19, 1955 V- J. PALERMO KNIFE 2 Sheets-Sheet 2 Fig, 9

Fig. 6

Vincen/ J. Pa/erm 0 INVENTOR,

BY WWW z5 KNIFE v Vincent J. Palermo, Detroit, Mich.

Application May 19, 1953, Serial No. 355,987

3 Claims. (Cl. Sil-138) This invention relates in general to improvements inl knife constructions, and more specifically to a knife having an improved sheath.

The primary object of this invention is to provide a knife having a sheath firmly secured thereto, the sheath,

United States Patent lapsible knife sheath construction which is relatively compact and simple and formed of readily obtainable kmaterial so as to be economically feasible.

Another object of this invention is to provide an improved knife construction which includes a collapsible sheath normally enclosing a knife blade, the sheath having carried thereby a knife Sharpener engaged with a cutf ting edge of the knife blade whereby the knife `blade is automatically sharpened upon collapsing an extension of the sheath. y

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure l is a top plan view of the knife which is the subject of this invention and shows the same with the sheath in the knife blade enclosing position;

Figure 2 is a side elevational view of the knife of Figure 1;

Figure 3 is a fragmentary side elevational View of the knife of Figure l and shows the same with the sheath in its lcollapsed position forming a handle of the knife;

Figure 4 is a fragmentary top plan view of the knife with the sheath in its collapsed state;

Figure 5 is an enlarged fragmentary sectional view taken substantially upon the plane indicated by the section line 5 5 of Figure 2 and shows the manner in which the kniferblade is pvotally connected to a connecting member of the sheath;

Figure 6 is an enlarged fragmentary sectional viewv taken substantially upon the plane indicated by the section line 6 6 of Figure 4 and shows the relationship of the sheath with respect to the knife blade when the sheath is in its collapsed state;

Figure 7 is an enlarged fragmentary sectional view taken substantially on the plane indicated by the section line 7 7 of Figure l and shows the relationship of a forward portion of the sheath with respect to a forward portion of the knife blade when the sheath is in its extended position;

Figure 8 is a transverse sectional view taken substantially upon the plane indicated by the section vline 8 8 of Figure 7 and shows the relationship of broach sharp- 2,744,320 Patented May 8, 1956 Figure 1l is an enlarged perspective view of a spring`r clip carried by the knife guide for retaining the sheath in its extended position; and g Figure 12 is a rear perspective view of the knife guide.

Referring now to the drawings in detail, it will be seen that there is illustrated a knife which is the subject of this invention, the knife being referred to in general by the reference numeral 10. The knife it). includes an elongate knife blade which is referred to in general by the reference numeral l2 and an elongated, collapsible combination sheath and handle for the knife blade, the sheath being referred to in general by the reference numeral 14.

The sheath 14 includes a rearmost connecting member 16 which has an enlarged rear portion 18 forming a handle. The rear portion 18 is provided with an opening 20 therethrough which is adapted to receive a chain or the like. Disposed immediately forward of the enlarged nermost tubular sheath section 2.6. The sheath section 26 is provided at its rear end with inwardly turned flanges 2S which engage behind the shoulder 24 and prevent movement of the sheath section 26 from the connecting member 1.6.

Telescoped over the sheath section 26'is an intermediate sheath section 30 which is provided at its rear end with inturned lianges 32. The inturned flanges 32 of the intermediate sheath section 30 engage outwardly turned flanges 34 at the forward end of the innermost sheath section 26.' Telescoped over the intermediate sheath section 30 isv an outermost sheath section 36. The sheath section 36, like the sheath section 3l) is provided at its rear end with inwardly turned flanges 33. rl`he lianges 38 ride on the outer surface of the intermediate sheath section 30 and engage behind outwardly turned flanges 49 at the forward l end of the intermediate sheath section 3G.

rl`elescoped within the forward end of the outermost sheath section 35 is a knife blade guide which is referred to in general by the reference numeral 4Z, The knife blade guide 42. includes an enlarged guard 44 at the forward vend thereof, the guard having a vertically extending, rectangular opening 46 therethrough. CarriedV at the rear side of the guard 44 and extending rearwardly therefrom is a generally rectangular cross-sectional extension 48 which is telescoped within the forward end of the outermost sheath section 36.

As is best illustrated in Figures 8 and l2, the extension 48 is provided with a vertical recess Sil which is in alignment with the opening 46. The recess Sii has communicating therewith an enlarged longitudinally extending recess 52, the recess 52 being a portion of and constituting an upper extension of the recess 50. The recessSZ terminates at its bottom in a pair of spaced arcuate cam tracks 54 whose purpose will be set forth in more detail hereinafter.

Referring now to Figure l1 in particular, it will be seen that there is illustrated a spring clipwhich is referred to in general by the reference numeral 56, The spring clip 56 includes a longitudinally extending spring leg 58 which is secured to a bight portion 6i) of an inverted U- shaped support. The U-shaped support also includes a pair of depending flanges 62 which are integral with the bight portion 60. The flanges 62 are provided adjacent their lower ends with outwardly projecting bosses 64 which are preferably punched from the metal of the flanges 62.

Referring now to Figures 5, 8 and` l2 in particular, it will be seen that the portion of the extension 48V immediately adjacent the guard 44 is provided with a pair of vertically extending recesses 66. The recesses 66 are of a width to receive the flanges 62 and have the flanges disposed in. the upper portion thereof, the spring leg 58 overlying the recess 5l] in the extension 48.

As is best illustrated in Figure 8, when the spring clip 56 is mounted on the extension 48 of the knife guide 42, the bosses 64 thereof are seated in outwardly directed indentations 68 formed in the side walls of the outermost sheath section 36. In addition to a friction fit between the extension 48 and the outermost sheath section 36, the connection between the bosses 64 and the indentations 68 prevent accidental removal of the knife guide 42 from the outermost sheath section 36.

Referring now to Figure l in particular, it will be seen that there is illustrated a bed for breach Sharpener elements, the bed being referred to ingeneral by the reference numeral 70. The bed 70 includes a lower supporting member 72 which has formed therein a pair of longitudinally extending, generally semi-circular crosssectional seats 74. Secured to the supporting member 72 at the forward end thereof and extending upwardly from the outer edges thereof is a pair of supporting legs 76.

When the bed 70 is properly positioned, the legs 76 are in vertical alignment with the flanges 62 of the spring clip 56 and are disposed in the vertical recesses 66 inthe extension 48. The bed 70 is retained in position with respect to the extension 48 by the outermost sheath section 46 which is telescoped thereover in the manner best illustrated in Figure 8.

Referring now to Figures S and 6 in particular, it will be seen that the connecting member 16 is provided with a longitudinally extending vertical groove 78 therethrough. Seated in the groove 78 is a hilt portion 80 of the knife blade 12. The hilt portion 80 of the knife blade is pivotally connected to the connectingl member 16 by a transverse separable fastener 82 which passes' through aligned openings in both the hilt 80 and thel connecting member 66.

Referring now to Figures and 6 in particular, it will be seen that carried by the knife blade 12 at opposite sides thereof adjacent the hilt 80 thereof is a pair of transversely extending rollers 84. When the sheath 14 is in its collapsed state the roller 84 engages the -trackways 54 of the extension 48 and causes a downward camming of the knife guide 42 to result in a binding connection between the knife blade 12 and the sheath 14.

In order that the sheath 14 may be further retained in av collapsed state, the shoulder 22 of the connecting member 16 is provided with a pair of vertically extending, outwardly directed bosses 86. When the sheath 14 is in a collapsed state, the flanges 38 of the outermost sheath section 36 is telescoped over the shoulder 22. The flanges 38 and associated portions of the sheath section 36 are provided with vertically extending, outwardly directed indentations 88. The bosses S6 are received in the indentations 88 to resist movement of the outermost sheath section 36 with respect to the connecting member I6. Furthermore, the extension 48enga'ges" the forward end ofthe sheath sections 26 and 30 to prei/'ent' 4 forward movement of the same as is best illustrated in Figure 6.

Carried by the bed 70 is a pair of broach sharpening elements and 92. The broach sharpening elements are substantially identical but face in opposite directions. It will be understood that the broach sharpening elements 90 and 92 are disposed in alignment with a cutting edge 94 of the knife blade 12 on opposite sides thereof, the cam tracks 54 arching away from the broach sharpening elements 90, 92 in the direction of extension of the sheath 14, and the spring leg 58 tending to yieldingly swing the knife 10 on the fastener 82 toward the broach sharpening elements 90, 92.

The described knife operates as follows. Assuming that the sheath 14 is fully collapsed, as shown in Figure 6, the cam tracks 50 are engaged with the rollers 84 and the knife blade 12 has been pivoted thereby, or swung, on the fastener 82, in opposition to the spring leg 58, in a direction to move its cutting edge away from and out of engagement with the broach sharpening elerr'ierits 90, 92. Upon extension of the sheath 14, the outerfn'os't section 36 is first moved forwardly and carrie's with it the knife blade guide 42 and the broacli sharpening' elements 9x0', 92'. Initial forward movement of said section' 36 and guide 42 causes the cam tracks 54 to be moved forwardly of the' rollers 84 and to disengage ysaid rollers so that the spring leg 58 pivots the knife blade 12 on the fastener 82 in the opposite' direction toward the broacli Sharpening elements' 9o', 92 to' engage the cutting edge a4 of said blade 12 with said sharpening elements 90, 92, as shown in Figure' 7, arid rn'airitain` said edge so engaged during further' extension of th'e' sheath 14 and also duririg collapse of the she'a'tl1`114 until the section 36 has been' moved rearwardly' sufficiently to engage the cam tracks 54 with the rollers` 84. Furtherv mover'n'ent of the outermost section 36 rearwardly will cause the cam tracks 54 to move the' rollers' 84 and knife blade 12 away from and out of engagement with the broach sharpening elements 90, 92 as' the sheath 14 isfully collapsed.

From the foregoing, the construction an'd operation of the device will be readily understood and further explanation is believed to be unnecessary. However, sin'c'e numerous modifications and' changes will readily occur to those' skilled in the art, it is not desired to limit the invention to 'the exact construction shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the ap*- pended claims.

What' is claimed' as new is as follows:

l. A knife comprising a handle having a' front extension, a knife bla'de projecting forwardly from said extension and having a cutting edge and a back edge, a tubular telescopic sheath for said knife blade including an' inner section nx'ed'I on said extension and an' outer section tele'- scoping over the inner section for movement forwardly and rearwardly to sheath and expose said blade and having an open front end through which said blade extends when exposed, a` blade Sharpener fixed in the front end of said' outer section and movable thereby along saidl` cutting edge, said blade being pivoted at one end in said extension and swingable on its pivot toward and from said Sharpener to engage its cutting edge with said sharpen'er andv diseng'age said cutting edge from said Sharpener, spring means attached in said front end of said outer section' and bearing against the back edge of the knife blade' to swing said blade towards said Sharpener,` and cam and roller devices, respectively, coengaging in response to rearward movement of said outer sectiori to swing said knife blade away from said Sharpener, one of said devices being mounted on said blade and the other of said devices being fixed in the front end of said' outer section for movement' therewith relative to the prising a slotted blade guide at the' front end? of said outer' section with a pair offspaced cam tracks thereon" in said outer section arching toward the front end of saidy outer section and away from said Sharpener and between which said blade swings.

3. The combination of claim 2, said roller device comprising a pair of rollers mounted on opposite sides of the 5 knife blade for riding said cam tracks.

References Cited in the le of this patent UNITED STATES PATENTS FOREIGN PATENTS Great Britain Feb. 16, 1860

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1181681 *Feb 21, 1913May 2, 1916Edouard-Pierre NicaudDagger.
US1890506 *May 14, 1932Dec 13, 1932Frank Earl LSelf-sharpening knife
US2253422 *Aug 1, 1940Aug 19, 1941Douglass Edward RBlade holder
US2676400 *Feb 26, 1951Apr 27, 1954Darpinian Ernest VaunFlorist's knife
GB186000427A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3676961 *Apr 6, 1970Jul 18, 1972Wiltshire Cutlery Co PtyKnife scabbard or holder
US3846909 *Oct 29, 1973Nov 12, 1974Clarke RCombination of a knife and sharpener
US4494339 *Nov 16, 1982Jan 22, 1985Wilkinson Sword LimitedKnife sharpeners
US4862590 *Nov 10, 1987Sep 5, 1989Mcpherson's LimitedRetractable blade knife
US4866845 *Mar 22, 1988Sep 19, 1989Mcevily John BKnife holding and sharpening block
US4869027 *Jan 11, 1988Sep 26, 1989Mcevily John BKnife holding and sharpening cassette and knives therefor
DE4112482C1 *Apr 17, 1991Apr 16, 1992Martor-Argentax E. H. Beermann Kg, 5650 Solingen, DeTitle not available
EP0185483A2 *Dec 2, 1985Jun 25, 1986Fiskars LimitedImprovements in or relating to knife sharpeners
EP0271223A1 *Nov 11, 1987Jun 15, 1988McPherson's LimitedRetractable blade knife
Classifications
U.S. Classification30/138, 30/162
International ClassificationB24D15/08, B26B29/02
Cooperative ClassificationB26B29/02, B26B29/025, B24D15/084
European ClassificationB26B29/02A, B26B29/02, B24D15/08C