MXPA94008058A - Double cross lock knife - Google Patents

Abstract

The blade of a folding knife is pivoted on a D-shaped pivot axle which also serves to lock the side pieces and belt clip of the knife in place. A thumb pin used to open the blade is also D-shaped and press fit into place in the blade. The blade has transverse grooves at its base to aid in extracting the knife from a sheath. The blade is locked into place by a side-lock plate, which is held in place by ridges in the side pieces. The side pieces are preferably made of rigid plastic, but with soft inserts in the sides for improved gripping.

Description

08/307183 SEAL MAILING ROOM Jl Patent and Trademark Office SEPTEMBER 16, 1994 MOBILE KNIFE WITH KNIFE Background of the Invention This invention relates to knives, and more particularly, to an improved movable blade knife. This request is a continuation in part of the serial application No. 08 / 138,709, filed on October 18, 1993, for which priority is claimed; and it is also a continuation in part of the application No. 08 / 138,670, filed on October 18, 1998, regarding whose priority is claimed. The descriptions of these requests / "- s are incorporated by reference.

Knives are commonly available with either fixed blades or extendable blades. The fixed blade knife, whose blade is permanently fixed in the extended position, is popular with athletes in the open air because it is strong and can be provided with hunting, fishing and razor blade Extendable, on the other hand, can be provided with multiple blades and many more features than the fixed blade knife. The extendable blade knife is also more compact than the fixed blade knife for carrying and storing. The most popular type of extendable blade knife is the folding blade knife, and the present invention is preferably used in conjunction with such folding blade knives.

The folding blade knife has a blade body and at least one pivot shaft. The blade or blades are mounted in the form of a pivot on the pivot shaft or pivot shafts. The knife has a catch mechanism to hold the blades in the closed position within the blade body, until the razor user selected one of the blades for use. The selected blade is controllably extended by rotating it around its pivot bolt to the open position. An auxiliary for opening the blade, such as a thumb slot on the blade is frequently present.

A detent mechanism may be provided to retain the blade in the closed position so that it does not partially open in an uncontrollable manner. The one light closed position structure when the blade is going to be opened. A securing mechanism can be provided to secure the selected blade in the open position in a manner that allows for a subsequent selective release of the blade and pivot it back to the closed position. Alternatively, the securing mechanism for the extended blade may not be provided, so that the user holds the blade in position during use.

A number of locking and securing mechanisms are available for use with folding knives. In one approach, the mechanism includes a spring bearing on the blade to create an arrangement on the center that retains the blade in the closed position until it is forcefully opened against the spring force by the user. The spring mechanism creates a force that tends to return the blade to the closed position once the position on the center is reached. There may be a positive securing of the blade in the extended position, such as in the known rear securing configuration. In another approach, a ball retainer structure holds the blade in the closed position, and an assurance is provided to secure the blade in the open position "^" a In this case, there is no spring force to blade.

In yet another approach, a side securing plate is placed laterally on one side of the blade to be secured. The side securing plate includes a finger that is normally pressed towards the blade to be secured. The blade is normally kept closed by a detent mechanism. When the blade opens, the finger secures the blade in the open position. The user then selectively releases the blade so that it can be closed by bending by removing the finger pressure and disengaging it from the blade.

Even though all these mechanisms and approaches can be made operable, there is a continued need for structures for folding knives that are convenient to use, strong and reliable, relatively simple in mechanical arrangement and relatively inexpensive to produce. Such structures can help retain the blade in the closed position, grasping and opening the blade, and stretching the blade structure. The present invention provides such improved structure, and also provides related advantages.

Summary of the Invention of closure and opening, and convenience features that make it particularly suitable for general use. The knife is strong to the arrangement and to the way of interconnecting the structural components. The knife is held in the closed position by a detent mechanism that is quite smooth in operation and suitable for an opening with a knife hand. The features on the blade make it easy to retrieve the razor from its stored position, and firmly grasp the razor handle and operate the blade with one hand.

According to one aspect of the invention, a detent mechanism presses a blade toward its closed position upon completion of the blade with its closing movement. Such a razor comprises a razor body, a first member stationary fixed with respect to the razor body, and a second member that can move with respect to the razor body between a closed position in which the first member and the second member are in a fixed position. Front relationship and an open position where the first member and the second member is not in a front-end relationship. There is a detent mechanism comprising a retaining protrusion held on one of the first and second members and extending at a height above the member on which it is supported, having a surface profile thereon. A recess of is present on the other of the first and second members, the recess being positioned to receive the retainer protrusion there when the second • member is in the closed position. the recess has a recess surface profile that equals the protrusion surface profile on at least a respective portion of the profiles.

The knife can also be provided with a pivoting shaft for the blade that is cylindrical, but with a key structure that helps to hook the side pieces of the razor handle and a belt clip together. This knife comprises a knife body having a first side piece and a second side piece, with the second side piece being parallel to and separated from the first side piece. The first side piece and the second side piece have pivot shaft holes aligned therethrough. A cylindrical pivot shaft extends through the pivot shaft orifices, and a blade is pivotally supported on the pivot shaft. A clip having a latching region is attached to one of the side pieces. There are key means for hooking the clip to the first side piece and to prevent the clip from rotating with respect to the first side piece. The key means include a key on the pivot shaft, and a hole A thumb pin is present in some modes to help open the blade from its position • closed. This blade comprises a handle and a blade movably secured to the handle and having a thumb bolt receiving opening not circular therethrough. A thumb bolt has a cross-sectional shape along a first portion of its length equaling the cross-sectional shape of the thumb bolt receiver, which first portion is roughened, preferably by rifling, and is adjusted to pressure inside the thumb bolt receiving opening.

An assistant to grab and extract the razor from its stored position, on a belt clip or in a bag can be used. A razor of this type comprises a handle and a blade fastened in a pivot to the handle and having a long axis. The blade has a blade root portion with an upper side and a bottom side. A first plurality of grooves are formed on the upper side of the blade root portion, with the grooves extending perpendicular to the long axis of the blade. A second plurality of blades is formed on the bottom side of the blade root portion, with the slots extending perpendicular to the long axis of the blade. rigid with flexible inserts on the side pieces. This # Razor knife comprises a blade and a handle to which the blade is attached. The handle includes a first side piece and a second side piece lying parallel to, and spaced apart from the first side piece to receive the blade therebetween. Each of the first and second side pieces comprises a rigid plastic frame having an opening therethrough, and a flexible insert fixed within the opening. The insert is preferably made of an elastomer that is fixed in place by sonic jalous welding.

In a particularly preferred embodiment, the knife has a lateral securing mechanism to releasably secure the knife in the open position. Said securing mechanisms are known, but in some cases the knives using such an assurance lack structural strength in the handle, particularly where the side pieces of the handle are made of a non-metallic material.

# Metallic, such as a plastic. A razor having an improved lateral securing mechanism includes a blade having an upper side and a bottom side, a first side piece, and a second side piece which are parallel to, and spaced apart from, the first piece side pieces each have a part of the bottom part that lie respectively on a top and the bottom side of the blade when the blade is in an open position. an axis of • ÍÍL pivote extends between the first lateral piece and the second * ^ lateral piece in a first end of the knife. The blade is supported on the pivot shaft so that the blade can pivot from the open position to a closed position. A securing plate lies parallel to and between the first side piece and the second side piece. The securing plate is positioned between the first side piece and the blade when the blade is in the closed position. The securing plate has a first end S | adjacent to the pivot shaft and a second remote end of the pivot shaft. The first side piece has a first eyebrow raised along the bottom side of the side piece adjacent to the second end of the belay plate. The second side piece has a second eyebrow highlighted along the upper side of said piece adjacent the second end of the securing plate. The first eyebrow and the second eyebrow capture the second end of the securing plate between them and hold it firmly in place. The metal securing plate thus becomes a structural component that reinforces and adds rigidity to the knife handle, as well as to serve its usual role as an assurance mechanism for the blade. here, therefore using extendable blade that It is well established and familiar to users of knives. The improvements help retain the blade in the closed position, retrieve the blade, open the blade, and hold the blade. The components of the blade are held together in a rigid and reliable structure. Other features and advantages of the present invention will become apparent from the following more detailed description of the preferred embodiment taken in conjunction with the accompanying drawings, which illustrate, by way of example, the principles of the invention.

Brief Description of the Drawings Figure 1 is an exploded perspective view of a knife according to the invention.

Figure 2 is a sectional view through the region of the knife shaft of the knife of Figure 1, along line 2-2 of Figure 1, but after the assembly of the knife components.

Figure 3a is an elevated view of the interior side of the first side piece; a high of the plate with respect to the first figure 3a.

Figure 4a is an elevated view of the inside side of a second side piece; * Figure 4b is an elevated view of the securing plate to be oriented with respect to the first side piece as shown in Figure 4a.

Figure 5 is a sectional view of a conventional detent mechanism.

Figure 6 is a sectional view of a detent mechanism according to the invention.1.

Figure 7 is an elevated view of the thumb pin; Y Figure 8 is a sectional view through one of the side pieces of the knife of Figure 1, taken along line 8-8.

Detailed description of the invention Figure 1 shows a razor 20 according to the invention in an exploded perspective view to illustrate ictura and assembly of the components of the razor. The The knife 20 includes a razor body 22, which serves as a handle when the knife is opened. The body of »Razor 22 includes a first side piece 24 and a second side piece 26. The side pieces 24 and 26 are elongated along a knife shaft 27 to fit comfortably in the hand of a user, a root part 28 of a blade 30 and a securing plate 32 are positioned between the two side pieces 24 and 26, with the securing plate 32 positioned between the blade 30 and the first side piece 24 in the illustrated embodiment.

The knife 20, its component side pieces 24 and 26, the blade 30 and the securing plate 32 can be described as having an upper side 34 and a bottom side 36. The upper and bottom sides of the moving blade 30 are defined with reference to its orientation in the illustrated open blade position. The blade 20, its component side parts 24 and 26, and the securing plate 32 ? they can further be described as having a front end 37 from which the blade 30 projects when it is opened, and a rear end 38 on the opposite side of the blade. The upper side, the bottom side, the front end and the rear end of the knife are defined by reference when describing the interrelation of the components and characteristics of the The knife 20 is of the preferred lateral securing type, in which the blade 30 is fixed in its position * opened by securing plate 32 in a manner to be described. However, the features of the present knife that are not directly related to the securing plate can be used in conjunction with other types of extendable blade knives such as those folding insurable back folding knives.

A first plurality of slots 40 is present on the upper side 34 in the root portion of the blade 28. A second plurality of slots 42 are present on the bottom side 36 of the blade root portion 28. Slots 40 and 42 they extend perpendicular to the long axis of the knife, the knife axis 27. These slots 40 and 42 are used to grip the blade 20 to recover it from a stored location. The knife 20 can be provided with a clip 40 for fastening to a belt, or it may not have the clip and be used in conjunction with a storage bag or stored in the user's bag. In any of these storage approaches, when the knife is to be used, the user grabs the knife to retrieve it. Particularly, or when the knife is wet or tightly held in the storage position, it may be difficult to retrieve a razor. recovery, the blade 30 is normally closed, but the presence of the two sets of slots 40 and 42 ensure that the slots will be accessible to the fingers on the bottom of the top side and the bottom side of the blade when the blade is closed) .

It has been known to provide a unique set of slots along the upper side (also sometimes called the rear side) of the blade 30, but these slots serve primarily to give a thumb action to the user's thumb in cutting operations when the knife is # open The grooves on the upper side 40 of the present knife 20 can be used in this manner. However, these may also cooperate with the second set of slots 42 for the recovery function described above. This cooperation is absent when only a single slot game is used.

The blade 30 can be pivoted between a position # open, illustrated in figure 1, and a closed position, in which the blade is bent in the body of the knife 22. To achieve the pivoting action, the root part 28 of the blade pivots about an axis of pivot 50 placed near the front end 37 of the razor body 22. The pivot axis * ^^ 5 ^ * is generally cylindrical but with a cylindrical surface of the pivot shaft 50, but also provides a key structure that helps hold the razor components in a defined position.

The pivot shaft 50 is oriented transverse to the axis of the knife 27. Referring to Figures 1 and 2, the pivot shaft 50 extends through a pivot hole 52 which is formed by the alignment during the assembly of a pivot hole opening 52a in the clip 42, a pivot hole opening 52b in the first side piece 24, a pivot hole opening 52c in the lock plate 32, a pivot hole opening 52d in a first washer 54, a pivot hole opening 52e in the root portion 28 of the blade 30, a pivot hole opening 52f in a second flange 56, and a pivot hole opening 52g in the second side piece 26. The opening The pivoting hole 52 in the blade 30 is circular, so that the blade 30 can pivot on the cylindrical part of the pivot shaft 50.

The pivot hole openings 52d and 52f are also preferably circular, but there is no reason to prevent tumbling of the 54 and 56 washers and because conventional washers are available with central openings pivot 50 has a key 58 on the two of the orifice openings of pivot 52a, 52b, 52c and 52g have a keyway 60 in the opening that matches the key 58. The terms "equal # a ";" matches with "or similar, are used here to mean that two components have surfaces that conform to each other when the components are placed in a front relation, eg, in the preferred approach, the key 58 is a flat surface on one side of the pivot shaft, produced by machining a plane inside the cylinder The key path 60 is a flat surface that matches the interior of the aperture The pivot shaft 50 can be inserted through the opening only by aligning the flat surface of the key with the flat surface of the key with the flat surface of the keyway, once the pivot shaft 50 has been inserted into the opening, the Pivot shaft can not be rotated with respect to the opening due to contact of the key with the key way.

The coupling of the key on the pivot shaft 50 # with the keyways over the pivot hole openings 52a, 52b, 52c, and / or 52g prevents the key elements from rotating with respect to one another, thereby serving to hold them in place in the assembled knife. In the preferred embodiment, all the openings 52a, 52b, 52c and 52g 44, the first 32 and the second the key 58 in against the rotational movement and also act together when the cutting forces are applied to the body of the knife 22 with the hand of the user during the use of the knife 20. This contact therefore reinforces the body of the knife 22 so that it acts as a single unit, without the need for multiple additional fasteners at the front end 37 of the blade body 22.

By this approach, the clip 44 is engaged with the razor body 22 to resist rotational movement when the clip is placed on a belt or the like. The rotation of the clip 44 is also avoided by providing a non-circular shaped contact region 62 at the end of the clip closest to the front end 37 of the blade body 22, as shown in Fig. 2. A recess 64 in the The outer side of the first side part 24 has a shape that matches that of the contact region 62, so that the contact region 62 is received within the recess 64. # The pivot shaft 50 is preferably provided with a head 66 at one end. The opposite end is internally threaded. A pivot shaft retainer screw 68 has a head 70 at one end and is threaded placed through the pivot hole openings 52, and the pivot shaft retainer screw 68 is engaged and # tight to retain the front end 37 of the knife together.

The securing plate 32 is hooked to the side pieces 24 and 26 by a geometric adjustment rather than by a separate fastener, thereby minimizing the use of fasteners in the razor 20. Figures 3a and 3b show the surface ratio of face inward of the first side part 24 and the securing plate 32 and figures 4a and 4b show the relation of the face surface inward of the second side part 26 and of the securing plate 32. The view of the figures 4a and 4b is rotated about the knife axis 27 of Figure 1, compared to the view of Figures 3a and 3b for clarity.

Referring to Figure 3a, the first side piece 24 is generally flat on its inner surface 78 but has a first eyebrow 80 which is highlighted about 0.040 inches above an inner surface 78 of the first side piece 24. (All dimensions are set here as presented by way of example for a preferred version of the razor 20). The first eyebrow 80 is Referring to Figure 3b, the securing plate 32 has a matching first cutting region 82. When the securing plate 32 is assembled with the first side part 24, the securing plate rests against the inner surface 78 without the cut 82 equaled to and hooked to the first eyebrow 80.

Referring to Figure 4a, the second side piece 26 has a generally planar interior surface 84 with two distinct highlighted regions. A shelf 86 that is highlighted with respect to the flat surface 84 by about 0.040 inches extends over a portion of the interior of the second side piece 26 from just behind the root portion 28 of the blade to the rear end 38 of the body of razor 22. A second eyebrow 88 is highlighted with respect to shelf 86 by about 0.040 inches. The second eyebrow 88 extends from a point about halfway down the top side 34 to the back end 38 of the second side piece 26 (a distance of about 1155). # inches in a preferred version of the knife), on the periphery of the second side piece 26. The shelf 86 is adjacent to, but located more centrally than the second tab 88. Referring to Figure 4b, the securing plate 32 has a second cutting region that matches the second eyebrow 88.

In the assembly, as shown in Figure 1, the second washer 56 (not shown in Figures 4a or 4b) is # positioned to one side of the inner surface 84, and the root part 28 of the blade 30 is placed on the second washer 56. The securing plate 32 is placed on the root portion 28 of the blade 30, with the regions back and top of the securing plate resting against the shelf 86. The inner surface 84 and the adjacent periphery of the shelf 86 thus form a pocket into which the blade 30 is folded when the blade is closed. The second cutting region 90 equalizes and engages the second eyebrow 88. A fastener 92 is positioned through a fastening hole 94 formed by the aligned holes in the first side part 24, the securing plate 32 and the second side plate 26 as it is shown in figure 1.

The cooperation of the key structure of the pivot shaft 50, the fastener 92, and the equalizing contact of the # cuts 82 and 90 of the securing plate 32 to the respective eyebrows 80 and 88 imparts a high structure stiffness to the razor 20 while using only two fastening components 50 and 92 that extend through the thickness of the knife . In a preferred version of the knife 20, the side pieces 24 and 26 are formed of a plastic relatively themselves do not have the knife uses of the plate. securing 32 to the side pieces 24 and 26 increases the overall stiffness of the body of the knife 22 so that it # is sble for a moderately heavy work cut.

When the blade 30 is rotated about the pivot shaft 50 to the closed position within the razor body 22, it is desirable that there be a retainer structure to hold the blade 30 in place. The retainer structure pulls the blade into its proper closed position on the last part of the closing pivoting movement. The retainer structure must easily be overcome by the user to rotate the blade 30 to the open position.

The ball-and-recess detent mechanisms are well known in the art; and Figure 5 illustrates such detent mechanism. One of the front elements 100 has a semicircular protruding ball 102. The ball 102 is normally installed inside the element 100 by drilling a hole 103 through the element 100. The hole 103 has # a diameter slightly smaller than that of the ball 102, so that the ball 102 fits snugly into the hole 103 during installation. The other of the face elements 104 has a recess 106 within which the ball 102 is received. In Figure 5, the elements 100 and 104 are lightly spaced-fcß ^ separated for illustrative purposes. In the 0. 020 inches above the surface of the element 100, and the recess 106 is slightly more than 0.020 inches deep so that the ball 102 does not touch fully in the recess 106. When the elements of the open position in which the ball is moved are moved. 102 and the recess 106 are not in a facing relationship to the closed position in which the ball 102 and the recess 106 are placed in a front relationship as shown in Figure 5, the ball 102 slides down to the side of the recess 106, pulling the elements 100 and 104 into the final closed position. When the elements are to be moved back to the open position, the slightly elastic elements 100 and 104 are separated by a manual force. The required separating force is the force that holds the elements in the closed position until the opening is desired. Although it may be operable, such a conventional detent mechanism is relatively expensive to produce. The hole 103 and the ball 102 must be precisely designed. The ball 102 must precisely fit tightly into the hole 103, and this installation is often accomplished only with great difficulty. It is therefore difficult to achieve a good repetition of the installation and / or of the catch mechanism.

An improved detent mechanism according to the present invention is illustrated in FIG. 6. A first in the present case is the plate of a retainer protrusion 110 on the same. The detent protrusion 110 has a protrusion surface profile of detent 112. The protrusion of detent 110 is preferably machined onto the first member 108 during manufacture. This is not typically prepared as a separate element which is then attached to the first element 108, as in the case of the conventional ball-retainer mechanism.

A second element 114, which in the present case is the root part 28 of the blade 30, has a recess 116 there. The recess 116 has a protruding surface profile of recess 118. In the preferred case, the recess surface profile 118 includes a flat bottom 120 parallel to the upper surface 124 of the second element 114 and an inclined side surface 122, which is normally inclined at an angle of about 45 ° to the flat bottom 120.

The retaining boss surface profile 112 has a shape that is matched to the surface profile 118 of the recess 116, over at least a portion of its areas. In this case, the retaining protrusion 110 has a flat elevated surface 126 parallel to an upper surface l ß- of the first element 108. The raised surface inches deep, so that the raised surface 126 of the detent protrusion 110 does not reach the bottom on the bottom of the recess 106 when the retainer elements are hooked together. The detent protrusion 110 has an inclined lateral surface 130, which is more preferably inclined at an angle of about 45 ° to the raised surface 126.

The profiles 112 and 118 are illustrated in Figure 6 as being equal over their entire areas, but this is not necessarily the case and is done in this manner for easy machining of the parts. Profiles require only being matched for the portions that are moved past one another during closing and opening operations. For example, if the element 108 is held stationary, the element 114 is moved to the closed position by a movement in the direction of the arrow 132, only the inclined sides 122a and 130a meeting first one another during the closing movement. * To help move the blade 30 from the closed to the open position, a thumb bolt 140 protrudes from a side 142 of the blade 30. When the blade is closed, the thumb bolt 140 is received within a cut 144 on the ^ js-ßCDCmá lateral piece 26. The use of the bolts of by means of an additional component, such as a threaded fastener. The fastener protrudes the opposite side of the blade from the thumb bolt, requiring the provision of a space within the blade body for the fastener to protrude when the blade is in the closed position and also adversely affects the appearance of the blade. Additionally, the thumb pin can be released over time and use in the service.

Figure 7 illustrates the thumb pin 140 of the present invention in greater detail. The thumb pin 140 is generally cylindrical with two parts. A first portion 146 has a first size and a cross-sectional shape, and has a length equal to the thickness of the part of the knife 30 which is assembled. The first part includes a key 148. The key 148 has a shape that is equal to but before the assembly is sized slightly with respect to, the shape of a thumb-bolt receiving opening 150 in the blade 30. That is, the thumb bolt receiving aperture 150 acts as a key way to receive the key 148. In the present case, the key 148 is of a "D" shape, matched to a "D" shape of the bolt receiving aperture of the bolt. thumb 150. The first part 146 is made rough, preferably by grooves. For on the blade 30, the key is aligned with the opening. The first portion 146 is forcibly adjusted within the thumb bolt receiving aperture 150, slightly compressing the structure made * rough of the first portion 146 to fit within the receiver opening. This compressive fit retains the thumb pin 140 tightly in the thumb bolt receiving aperture 150, and the wrench action prevents the thumb bolt from rotating during service. A separate fastener is not required.

The thumb bolt 140 includes a second portion 152 that is radially enlarged over at least a portion of its length, to provide a thumb contact surface for the razor user. The radially enlarged portion of the second portion 152 may be smooth, as shown, or be slightly tousled to provide a frictional surface for the user. The previously described thumb pin structure and detent mechanism cooperate to assist reliable retention of the blade in the closed position within the blade and its smooth opening.

The side pieces 24 and 26 are preferably made of a durable plastic such as a plastic Zytel ® made by Dupont. Such materi.al, however, is li.so and can spap »" r < -tgbaloso when it gets wet.To help grab Flexible 160 facing outwards. The inserts 160 are preferably made of an Alcryn elastomer made by Dupont. He The use of such inserts 160 requires great care in their design and assembly to ensure that they do not come loose and separate from the body of the knife 122 during service. The inserts are designed to be held in place by a combination of union and structural constriction.

Figure 1 shows an interior surface 162 of the insert 160a in the first side part 24, and an exterior side surface l of the insert 160b in the second side part 26. The inserts 160a and 160b are identical in structure and manner of attachment to their respective side pieces. In the illustrated embodiment, the inserts 160 are oval, extending for most of the length of the central portion of their respective side pieces.

Figure 8 is a sectional view through a < Ht of such the side pieces, generally indicated at number 166. The side piece 166 has an opening 168 therethrough. The opening 168 includes a stepped inward face shoulder 170 by which the size of the opening is changed through the thickness of the side piece elastomeric 160 is matched in size to opening 168 and has a stepped outward facing shoulder that matches # 176. The insert 160 is assembled in the side piece 166 so that the shoulders 170 and 176 are in a front contact. The insert 160 is thus constrained in place against movement outwardly of the knife by contact of the shoulders 170 and 176. The insert 160 is fixed in place against inward movement by attaching it to the lateral piece along the shoulders and through any other points of contact. The joining can be achieved by any operable technique, more preferably by sonic welding. An adhesive can also be used, but this is less preferred.

The inserts 160 are therefore held firmly in place on the sides of the knife, and assist the user in grasping the knife during service.

Wk Although the particular embodiments of the invention have been described in detail for purposes of illustration, various modifications and additions may be made without departing from the spirit and scope of the invention. Therefore, the invention is not limited except by the attached clauses.

Claims (19)

Clauses # What is claimed is:

1. A knife that includes: a body of a knife; a first fixed member stationary with respect to the body of the razor; a second member that can move with respect to the body of the knife between a closed position in which the first member and the second member are in a front relationship and an open position where the first member and the second member are not in a front relation; Y • a catch mechanism that includes: a retaining protrusion that rests on one of the first member and the second member and extends at a height above the member on which it is supported, the protuberant "B" -? l «-! ß < ^ retainer has a surface profile of it, and a recess of retaining protrusion on the other of the first member and the second member, the recess being positioned to receive the retaining protrusion there, when the second member is in the closed position, the recess has a profile of recess surface that equals the protrusion surface profile on at least a respective part of the profiles.

2. The knife as claimed in clause 1, characterized in that the profile of the recess protrusion surface comprises: a flat protrusion base having a protrusion base length, a pair of inclined protruding sides, each protruding side being inclined at an angle of about 45 ° with respect to the flat base, and wherein the recess surface profile comprises: a flat recess base having a base length of recess, a pair of inclined recess sides, each recess side being inclined at an angle of about 45 ° # respect to the flat base, the base length of recess being sufficiently greater than the protrusion base length that the protrusion received within the recess with the protruding sides resting against the recessed sides when the second member is in the closed position. 1

3. The razor of clause 1, where the protrusion height is around 0.020 inches.

4. The knife of clause 1, wherein the second member comprises a blade that is pivotable with respect to the first member.

5. A knife that includes: • a blade body having a first side piece and a second side piece, the second side piece being parallel to and being spaced apart from the first side piece, the first side piece and the second side piece pivot shaft aligned through the a cylindrical pivot shaft extending through the pivot shaft orifices; a blade supported pivotably on the pivot shaft; a clip that has a contact region; Y key means for hooking the clip to the first side piece and to prevent the clip from turning with respect < ? s to the first side piece, the key means include a key on the pivot shaft, and a key way over the clip contact region.

6. A razor of clause 5, where: 1 the key comprises a flat surface formed on the pivot axis; Y the keyway comprises a contact opening through the contact region of the clip and the flat region on an inner hole of the contact opening, the

7. The knife of clause 5 wherein the contact region of the clip has a non-circular periphery, and wherein the means for contacting further include: a recess in the first side piece, the recess has a periphery shaped to receive the non-circular periphery of the latching region of the side piece thereon.

8. The razor of clause 5, where the means to engage also include: contact threads on one end of the pivot shaft; a cover having a threaded region for contact with the contact threads, the cover or cover has a head greater than the size of the cylindrical diameter of the pivot shaft.

9. A knife that includes: a handle; ujjgsaQ screams movably attached to the handle and thumb bolt circulating a thumb bolt having a cross-sectional shape along a first length that matches # With the cross-sectional shape of the thumb-bolt receiver, said first portion is roughened and adjusted with pressure center of the thumb-bolt receiving aperture.

10. The knife of clause 9, wherein the thumb bolt receiving aperture is d-shaped.

* 11. The knife of clause 9, wherein the first portion of the thumb bolt receiver is grooved.

12. A knife that includes: a handle; a blade fastened in a pivot to the handle and having a long axis, the blade has a blade root part with an upper side and a bottom side; a first plurality of grooves in the upper side of the blade root portion, the grooves extend perpendicular to the long axis of the blade; Y a second plurality of grooves in the bottom side of the blade root part, the grooves extend $ perpendicular to the long axis of the blade;

13. A knife that includes: a blade having an upper side and a bottom side; a first side piece; a second side piece lying parallel to and spaced apart from, the first side piece, the side pieces each having an upper side and a bottom side lying respectively on one side of the upper side and the bottom side of the blade when the blade is in an open position; a pivot shaft extending between the first side piece and the second side piece, at a first end of the blade, the blade being held on the pivot shaft so that the blade can pivot from the open position to a closed position; --------- U-U and the blade when the blade is in the closed position, the securing plate has a first end adjacent to the pivot shaft and a second end separated from the pivot shaft; the first side piece has a first eyebrow highlighted along the bottom side of the side piece on one side of the second end of the belay plate; Y the second side piece has a second raised eyebrow along the upper side of the side piece on one side of the second end of the belay plate, the first eyebrow and the second eyebrow capture the second end of the belay plate therebetween .

14. The knife of clause 13, where the insurance plate includes: and and a first hole through it placed and dimensioned so that the pivot shaft passes through it.

15. The knife of clause 13, where the knife also includes: a rear hole through the first side piece, the second side piece, and the second end of the securing piece; Y a rear fastener set extending through the rear hole for securing the first side piece, the second side piece, and the second end of the securing piece together.

16. The razor as claimed in clause 13, further including, a front fastener head hooked to the pivot shaft to secure together the first side piece, the second side piece, the first end of the longitudinal plate and the blade.

17. A knife that includes: a knife; a handle to which the knife is attached, the handle includes: a first side piece, lateral piece that lies parallel to and lateral piece to receive the blade each of the first and second side pieces comprises: * a rigid plastic frame having an opening therethrough, and a fixed flexible insert inside the opening.

18. The razor of clause 17, wherein the flexible insert is fixed within the opening by a weld # sonic.

19. The knife of clause 17, wherein the construction material of the flexible insert is an elastomer. MOBILE KNIFE WITH KNIFE Extract of the Description The blade of a folding knife is pivoted on a D-shaped pivot shaft that also serves to secure the side pieces and the belt clip of the knife in place. A thumb bolt is used to open the blade and is also D-shaped and snaps into place in the blade. The blade has cross slots in its base to help extract the blade from a scabbard. The blade is placed in place by a side securing plate which is held in place by ribs on the side pieces. Said side pieces are preferably made of a rigid plastic, but with soft inserts on the sides for improved grip.