US3896546A - Folding knife and replaceable blade therefor - Google Patents

Folding knife and replaceable blade therefor Download PDF

Info

Publication number
US3896546A
US3896546A US391604A US39160473A US3896546A US 3896546 A US3896546 A US 3896546A US 391604 A US391604 A US 391604A US 39160473 A US39160473 A US 39160473A US 3896546 A US3896546 A US 3896546A
Authority
US
United States
Prior art keywords
blade
carrier
pivot
mounting
handle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US391604A
Inventor
William John Hildebrandt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stanley Works
Original Assignee
Stanley Works
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stanley Works filed Critical Stanley Works
Priority to US391604A priority Critical patent/US3896546A/en
Priority to JP49096952A priority patent/JPS5921634B2/en
Application granted granted Critical
Publication of US3896546A publication Critical patent/US3896546A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B5/00—Hand knives with one or more detachable blades

Definitions

  • a folding knife having a replaceable blade is provided with an asymmetrically keyed connection for preventing reverse mounting of the blade.
  • the knife includes a blade carrier mounted on the blade pivot and having a blade locking boss thereon preventing relative rotation between the blade and the carrier whereby the blade and the carrier rotatably move as a unit between folded and extended positions.
  • the blade includes an aperture mounted on the pivot and a tangential slot extending from the aperture for cooperating with the blade locking boss to prevent reversable mounting of the blade on the carrier.
  • the present invention relates generally to folding knives, such as pocket knives and the like and is more particularly concerned with a new and improved folding knife of the replaceable blade type and a replaceable blade for use therein.
  • Folding blade knives such as pocket knives, jack knives and the like have been used for many years. Usually the blades in such knives are of a permanent nonreplaceable type. However, in some instances folding knives have been designed so as to permit replacement of the blade portion of the knife as it wears.
  • a typical example of such a structure is the knife described in U.S. patent application Ser. No. 310,365 filed Nov. 29, 1972 by Richard Gilbert and entitled Folding Blade Pocket Knives now U.S. Pat. No. 3,829,967 issued Aug. 20, 1974.
  • the replaceable blades for folding knives generally are constructed with slotted apertures of key hole configuration, that is, they have a circular aperture for mounting the blade on a suitably configured bladereceiving hub and a radially extending slot connected to the aperture.
  • the slot is adapted to cooperate with a boss extending radially from the hub along the axis of the blade to cooperatively provide keyed retention of the blade on the knife handle.
  • the cutting edge is at least partially exposed along the edge of the handle and can cause injury to the user even in its folded condition.
  • Another potentially dangerous result obtained from reversed or backward mounting of the blade is that the blade will accidentally close against the hand of the user while in use since the normal stops or abutments within the handle are arranged for preventing movement of the blade in the opposite direction. Further, because of the reversal of the blade within the handle the user experiences substantial difficulty in opening the knife to its extended condition.
  • Another object of the present invention is to provide a foldable knife and replaceable blade of the type described that utilize a blade carrier having an asymmetrically keyed interconnection that prevents reverse mounting of the blade thereon. Included in this object is the provision for a blade carrier rotatable with the blade and provided with a latching mechanism for holding the blade in both its open and folded positions.
  • Still another object of the present invention is to provide a new and improved replaceable blade for use in knives of the type described, which blades can be easily replaced in a rapid and facile manner and are constructed so as to render impossible their installation in an improper or backward fashion. Included in this object is the provision for a pocket knife blade having a simple yet extremely effective interlock with a disc-like blade carrier.
  • a folding knife having a handle, a pivot on the handle, a replaceable blade including a cutting edge, a blade carrier mounted on the pivot and having blade locking means thereon preventing relative rotation between the blade and the carrier whereby the blade'and the carrier rotatably move as a unit between a folded position with the cutting edge housed within the handle and an extended position with the cutting edge exposed, said blade having mounting means cooperating with said pivot for pivotably mounting the blade and connecting means asymmetric to said pivot and adapted to cooperate with said blade locking means to prevent reversable mounting of the blade on the carrier.
  • FIG. 1 is a side elevation view, partially broken away and partially in section, illustrating a pocket knife with the blade in its extended position, the knife incorporating the features of the present invention
  • FIG. 2 is a fragmentary view of the pocket knife of FIG. 1 with the blade in its folded position
  • FIG. 3 is a side view of the blade carrier disc utilized in the pocket knife of FIGS. 1 and 2,
  • FIG. 4 is an end view of the disc of FIG. 3, and
  • FIG. 5 is a side view of the replaceable blade used in the knife of FIG. 1.
  • the knife 10 is comprised of a narrow elongated handle 12 having complementary side wall members 14,16 held in firm mating relationship by a pair of threaded connectors 18,20 located at opposite ends of the handle and secured within transversely extending bosses, 22,24, respectively.
  • the boss 22 serves as a pivot for a blade 26 mounted thereon so that the blade can be moved from the sheathed position shown in FIG. 2 with the cutting edge 28 of the blade well inside the handle toward the operative position shown in FIG. 1 with the blade in an extended position.
  • the handle side members 14,16 when secured in abutting engagement by the threaded connectors 18,20, define a longitudinal edge slot 30 extending rearwardly from the front end thereof secured by threaded member 18.
  • the slot 30 provides communication with the interior of the blade handle 12 and permits the cutting blade 26 to be moved from its extended position to its sheathed position within the interior of the handle.
  • the threaded connector 18 at the forward or front end of the handle can be easily removed to release the sides 14,16 for pivotal separation in the manner described in the aforementioned application when replacement of the blade 26 is required or when access to a spare blade stored within the handle is desired.
  • a blade carrier 32 having a central circular aperture 34, is rotatably mounted on the boss 22 and fully housed within the handle 12.
  • the carrier 32 is of disc-like configuration and has a laterally extending projection 36 of elongated generally elliptical configuration on one side thereof.
  • the projection 36 abuts the central aperture 34 and extends tangentially therefrom to the periphery of the carrier.
  • the blade carrier disc 32 is additionally provided with a pair of peripheral recesses 38,40 at diametrically opposed locations.
  • the recess 38 is slightly larger than recess 40 and includes a latching shoulder 42 having a latching surface 44 inclined slightly from the radius of the disc.
  • the recess 40 is located adjacent side projection 36 and includes a nonradial latch driving surface 46.
  • the knife blade 26 secured to the handle 12 is an elongated member having a cutting edge 28 extending longitudinally along the bottom edge thereof and a generally circular mounting aperture 48 located adjacent one end thereof.
  • the blade 26 is provided with a terminal point 50 at the opposite end thereof and with the usual detent 52 for assisting the user in grasping the blade for movement from the sheathed position to the extended position.
  • the blade is further provided with an elongated slot 54 interconnecting with the mounting aperture 48 and extending tangentially therefrom. As shown, the slot 54 is offset from the center line of the blade extending through the aperture 48 and is approximately equal in length to the diameter of the aperture.
  • the length of the slot 54 is shown as approximately twice that of its width and it extends nonradially from the aperture 48 longitudinally along the blade.
  • the configuration and the size of the slot may be altered so long as it provides the desired nonreversibility of the blade when mounted on the carrier 32.
  • the pocket knife further includes a latch member 58 similar in construction and operation to the latch more fully described in the aforementioned patent application.
  • the latch 58 is spring biased into the position illustrated in FIG. 1 and is provided with finger grip portions 60 exposed at the rearward end of the handle for pulling the latch member rearwardly against the bias of return spring 62.
  • the latch 58 is also provided at its forward end with a cam follower surface 64 terminating in a latching shoulder 66 that is biased by spring 62 into a peripheral recess in disc 32.
  • the shoulder 66 will engage surface 44 of recess 38 when the blade is in its extended position to lock the disc 32 in the position shown in FIG. 1 and prevent rotation of the blade 26 out of its extended position toward its sheathed position.
  • shoulder 42 is released permitting counter clockwise rotation as viewed in FIG. 1 of disc 32 and movement of blade 26 toward the sheathed position shown in FIG.
  • latch 58 may be released so that spring 62 will urge cam follower surface 64 against the periphery of disc 32 until recess 40 is brought into registry therewith. Thereafter movement of blade 26 clockwise as viewed in FIG. 2 toward its extended position will cause driving surface 46 of disc 32 to engage the cam follower surface 64 and drive the latch 58 rearwardly against the bias of spring 62 until latch shoulder 66 falls off shoulder 42 into recess 38 and the blade 26 bears against the internal stop 68.
  • the pocket knife 10 illustrated in FIG. 1 also includes a storage compartment within the handle 12 for spare blades and the like.
  • the storage compartment is formed partly by the latch 58 which includes a triangular recess 70 for the pointed end of the spare blade and a laterally projecting boss 72 having a configuration corresponding to the mounting aperture 48 and slot 54 of the blade 26, the boss 72 being arranged so that the spare blade is mounted with its cutting edge facing away from the open slot 30 extending longitudinally along the blade handle 12.
  • the boss 72 also serves as a stop when blade 26 is folded into its sheathed position.
  • a folding knife having a handle, a pivot on the handle and a replaceable blade including a cutting edge, said blade being mounted on the pivot for pivotal movement through an arc of about between a folded position with the cutting edge housed within the handle and an extended position with the cutting edge exposed
  • the combination comprising a blade carrier mounted on the pivot and having blade locking means thereon preventing relative rotation between the blade and the carrier whereby the blade and the carrier rotatably move as a unit between said folded and extended positions, said carrier being enclosed within the handle and movable between said positions in response to movement of said blade, said blade having mounting means cooperating with said pivot for pivotably mounting the blade, said mounting means including means asymmetric to said pivot and adapted to cooperate with said blade locking means to mount said blade for pivotal movement of said locking means and said blade as a unit and to prevent reversible mounting of the blade on the carrier.
  • one of said cooperative blade locking means and asymmetric means is a protruding boss and the other is a recess for receiving said boss, said recess and boss cooperatively interlocking the blade on the carrier.
  • a replaceable knife blade for use in a folding knife having a pivot and a blade carrier including a boss extending asymmetrically to said pivot comprising an elongated blade body, a cutting edge extending along said body, mounting means adjacent one end of said body for mounting the blade on the carrier for pivotal movement about the pivot to permit folding of the blade and blade connecting means asymmetrically associated with said mounting means for cooperative engagement with said boss to require a specific nonreversible, mounted orientation of the blade on the carrier of the knife, wherein the mounting means and the blade connecting means are interconnected in the form of an asymmetrical keyhole, said mounting means comprising an enlarged circular aperture portion of the keyhole for mounting on the pivot and said blade connecting means comprising a relatively narrow elongated stem portion extending asymmetrically from said enlarged aperture, said stem keyhole portion cooperating with said boss to prevent reversible mounting of said blade on said carrier.
  • a folding knife having a handle, a pivot on the handle and a replaceable blade including a cutting edge, said blade being mounted on the pivot for pivotal movement through an arc of about 180 between a folded position with the cutting edge housed within the handle and an extended position with the cutting edge exposed
  • the combination comprising a disc-like blade carrier mounted on the pivot and having blade locking protruding boss thereon preventing relative rotation between the blade and the carrier whereby the blade and the carrier rotatably move as a unit between said folded and extended positions, said carrier being enclosed within the handle and movable between said positions in response to movement of said blade, said blade having mounting means cooperating with said pivot for pivotably mounting the blade, said mounting means including a recess asymmetric to said pivot and adapted to cooperatively interlock with said blade locking boss to prevent reversible mounting of the blade on the carrier.
  • a folding knife having a handle, a pivot on the handle and a replaceable blade including a cutting edge, said blade being mounted on the pivot for pivotal movement through an arc of about between a folded position with the cutting edge housed within the handle and an extended position with the cutting edge exposed
  • the combination comprising a blade carrier disc mounted on the pivot and having blade locking elongated boss extending tangentially of the pivot preventing relative rotation between the blade and the carrier whereby the blade and the carrier rotatably move as a unit between said folded and extended positions, said carrier being enclosed within the handle and movable between said positions in response to movement of said blade, said blade having mounting means cooperating with said pivot for pivotably mounting the blade, said mounting means including means asymmetric to said pivot and adapted to cooperate with said blade locking boss to prevent reversible mounting of the blade on the carrier.
  • a replaceable knife blade for use in a folding knife having a pivot and a blade carrier including a boss extending asymmetrically to said pivot comprising an elongated blade body, a cutting edge extending along said body, an aperture adjacent one end of said body for mounting the blade on the carrier for pivotal movement about the pivot to permit folding of the blade and a slot extending tangentially to said aperture and interconnected therewith for cooperative engagement with said boss to require specific nonreversible mounted orientation of the blade on the carrier of the knife.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Knives (AREA)

Abstract

A folding knife having a replaceable blade is provided with an asymmetrically keyed connection for preventing reverse mounting of the blade. The knife includes a blade carrier mounted on the blade pivot and having a blade locking boss thereon preventing relative rotation between the blade and the carrier whereby the blade and the carrier rotatably move as a unit between folded and extended positions. The blade includes an aperture mounted on the pivot and a tangential slot extending from the aperture for cooperating with the blade locking boss to prevent reversable mounting of the blade on the carrier.

Description

United States Patent Hildebrandt [75] Inventor: William John Hildebrandt, West Simsbury, Conn.
[73] Assignee: The Stanley Works, New Britain,
Conn.
[22] Filed: Aug. 27, 1973 [21] Appl. No.: 391,604
[52] US. Cl. 30/157 [51] Int. Cl B26b 1/02; B26b 5/00 [58] Field of Search 30/125, 155, 156, 157, 30/330, 331, 339, 158, 159, 154, 169
[56] References Cited UNITED STATES PATENTS 304,481 9/1884 Wilson 30/154 1,087,342 2/1914 Yerzley.... 30/157 3,063,147 11/1962 Paparelli 30/154 [4 1 July 29,1975
3,641,667 2/1972 Leopoldi 30/156 X Primary ExaminerAl Lawrence Smith Assistant Examiner-J. C. Peters Attorney, Agent, or Firm-Prutzman, Hayes, Kalb &
Chilton [57] ABSTRACT A folding knife having a replaceable blade is provided with an asymmetrically keyed connection for preventing reverse mounting of the blade. The knife includes a blade carrier mounted on the blade pivot and having a blade locking boss thereon preventing relative rotation between the blade and the carrier whereby the blade and the carrier rotatably move as a unit between folded and extended positions. The blade includes an aperture mounted on the pivot and a tangential slot extending from the aperture for cooperating with the blade locking boss to prevent reversable mounting of the blade on the carrier.
8 Claims, 5 Drawing Figures FOLDING KNIFE AND REPLACEABLE BLADE THEREFOR BACKGROUND AND SUMMARY OF THE INVENTION The present invention relates generally to folding knives, such as pocket knives and the like and is more particularly concerned with a new and improved folding knife of the replaceable blade type and a replaceable blade for use therein.
Folding blade knives, such as pocket knives, jack knives and the like have been used for many years. Usually the blades in such knives are of a permanent nonreplaceable type. However, in some instances folding knives have been designed so as to permit replacement of the blade portion of the knife as it wears. A typical example of such a structure is the knife described in U.S. patent application Ser. No. 310,365 filed Nov. 29, 1972 by Richard Gilbert and entitled Folding Blade Pocket Knives now U.S. Pat. No. 3,829,967 issued Aug. 20, 1974.
The replaceable blades for folding knives generally are constructed with slotted apertures of key hole configuration, that is, they have a circular aperture for mounting the blade on a suitably configured bladereceiving hub and a radially extending slot connected to the aperture. As described in the aforementioned application the slot is adapted to cooperate with a boss extending radially from the hub along the axis of the blade to cooperatively provide keyed retention of the blade on the knife handle. Unfortunately, such a construction permits the user to install the blade with the cutting edge facing in the wrong direction, thus creating a substantial and serious safety hazard. As will be appreciated, mounting of the blade in such a backward manner will expose the sharp cutting edge of the blade to the hand or fingers of the user as the blade is being folded into the handle. Additionally, once folded, the cutting edge is at least partially exposed along the edge of the handle and can cause injury to the user even in its folded condition. Another potentially dangerous result obtained from reversed or backward mounting of the blade is that the blade will accidentally close against the hand of the user while in use since the normal stops or abutments within the handle are arranged for preventing movement of the blade in the opposite direction. Further, because of the reversal of the blade within the handle the user experiences substantial difficulty in opening the knife to its extended condition.
Accordingly, it is an object of the present invention to provide a new and improved foldable knife and a replaceable blade therefore wherein the blade is mounted on the knife handle in such a manner as to prevent the possibility of backward installation thereby eliminating the numerous safety hazards associated therewith.
Another object of the present invention is to provide a foldable knife and replaceable blade of the type described that utilize a blade carrier having an asymmetrically keyed interconnection that prevents reverse mounting of the blade thereon. Included in this object is the provision for a blade carrier rotatable with the blade and provided with a latching mechanism for holding the blade in both its open and folded positions.
Still another object of the present invention is to provide a new and improved replaceable blade for use in knives of the type described, which blades can be easily replaced in a rapid and facile manner and are constructed so as to render impossible their installation in an improper or backward fashion. Included in this object is the provision for a pocket knife blade having a simple yet extremely effective interlock with a disc-like blade carrier.
Other objects will be in part obvious and in part pointed out in more detail hereinafter.
These and related objects are achieved in accordance with the present invention by providing a folding knife having a handle, a pivot on the handle, a replaceable blade including a cutting edge, a blade carrier mounted on the pivot and having blade locking means thereon preventing relative rotation between the blade and the carrier whereby the blade'and the carrier rotatably move as a unit between a folded position with the cutting edge housed within the handle and an extended position with the cutting edge exposed, said blade having mounting means cooperating with said pivot for pivotably mounting the blade and connecting means asymmetric to said pivot and adapted to cooperate with said blade locking means to prevent reversable mounting of the blade on the carrier.
A better understanding of the objects, advantages, features, properties and relations of the invention will be obtained from the following detailed description and accompanying drawing which set forth an illustrative embodiment and are indicative of the way in which the principles of the invention are employed.
BRIEF DESCRIPTION OF THE DRAWING In the drawing:
FIG. 1 is a side elevation view, partially broken away and partially in section, illustrating a pocket knife with the blade in its extended position, the knife incorporating the features of the present invention,
FIG. 2 is a fragmentary view of the pocket knife of FIG. 1 with the blade in its folded position,
FIG. 3 is a side view of the blade carrier disc utilized in the pocket knife of FIGS. 1 and 2,
FIG. 4 is an end view of the disc of FIG. 3, and
FIG. 5 is a side view of the replaceable blade used in the knife of FIG. 1.
DESCRIPTION OF A PREFERRED EMBODIMENT Referring now to the drawing in greater detail wherein like reference numerals indicate like parts throughout the several figures, the invention is shown as embodied within a folding blade pocket knife of the type described in greater detail in the aforementioned U.S. application Ser. No. 310,365. The disclosure contained therein is incorporated herein by reference.
As shown, the knife 10 is comprised of a narrow elongated handle 12 having complementary side wall members 14,16 held in firm mating relationship by a pair of threaded connectors 18,20 located at opposite ends of the handle and secured within transversely extending bosses, 22,24, respectively. The boss 22 serves as a pivot for a blade 26 mounted thereon so that the blade can be moved from the sheathed position shown in FIG. 2 with the cutting edge 28 of the blade well inside the handle toward the operative position shown in FIG. 1 with the blade in an extended position. The handle side members 14,16, when secured in abutting engagement by the threaded connectors 18,20, define a longitudinal edge slot 30 extending rearwardly from the front end thereof secured by threaded member 18. The slot 30 provides communication with the interior of the blade handle 12 and permits the cutting blade 26 to be moved from its extended position to its sheathed position within the interior of the handle. The threaded connector 18 at the forward or front end of the handle can be easily removed to release the sides 14,16 for pivotal separation in the manner described in the aforementioned application when replacement of the blade 26 is required or when access to a spare blade stored within the handle is desired.
A blade carrier 32, having a central circular aperture 34, is rotatably mounted on the boss 22 and fully housed within the handle 12. As shown in FIGS. 3 and 4, the carrier 32 is of disc-like configuration and has a laterally extending projection 36 of elongated generally elliptical configuration on one side thereof. The projection 36 abuts the central aperture 34 and extends tangentially therefrom to the periphery of the carrier. The blade carrier disc 32 is additionally provided with a pair of peripheral recesses 38,40 at diametrically opposed locations. The recess 38 is slightly larger than recess 40 and includes a latching shoulder 42 having a latching surface 44 inclined slightly from the radius of the disc. The recess 40 is located adjacent side projection 36 and includes a nonradial latch driving surface 46.
The knife blade 26 secured to the handle 12 is an elongated member having a cutting edge 28 extending longitudinally along the bottom edge thereof and a generally circular mounting aperture 48 located adjacent one end thereof. In a conventional manner the blade 26 is provided with a terminal point 50 at the opposite end thereof and with the usual detent 52 for assisting the user in grasping the blade for movement from the sheathed position to the extended position. In accordance with the present invention the blade is further provided with an elongated slot 54 interconnecting with the mounting aperture 48 and extending tangentially therefrom. As shown, the slot 54 is offset from the center line of the blade extending through the aperture 48 and is approximately equal in length to the diameter of the aperture. In the specific embodiment illustrated, the length of the slot 54 is shown as approximately twice that of its width and it extends nonradially from the aperture 48 longitudinally along the blade. However, as will be appreciated, the configuration and the size of the slot may be altered so long as it provides the desired nonreversibility of the blade when mounted on the carrier 32.
The pocket knife further includes a latch member 58 similar in construction and operation to the latch more fully described in the aforementioned patent application. The latch 58 is spring biased into the position illustrated in FIG. 1 and is provided with finger grip portions 60 exposed at the rearward end of the handle for pulling the latch member rearwardly against the bias of return spring 62. The latch 58 is also provided at its forward end with a cam follower surface 64 terminating in a latching shoulder 66 that is biased by spring 62 into a peripheral recess in disc 32. As shown in FIG. 1, the shoulder 66 will engage surface 44 of recess 38 when the blade is in its extended position to lock the disc 32 in the position shown in FIG. 1 and prevent rotation of the blade 26 out of its extended position toward its sheathed position. However, upon rearward movement of latch 58 against the bias of spring 62, shoulder 42 is released permitting counter clockwise rotation as viewed in FIG. 1 of disc 32 and movement of blade 26 toward the sheathed position shown in FIG.
2. As the blade is pivoted, latch 58 may be released so that spring 62 will urge cam follower surface 64 against the periphery of disc 32 until recess 40 is brought into registry therewith. Thereafter movement of blade 26 clockwise as viewed in FIG. 2 toward its extended position will cause driving surface 46 of disc 32 to engage the cam follower surface 64 and drive the latch 58 rearwardly against the bias of spring 62 until latch shoulder 66 falls off shoulder 42 into recess 38 and the blade 26 bears against the internal stop 68.
The pocket knife 10 illustrated in FIG. 1 also includes a storage compartment within the handle 12 for spare blades and the like. The storage compartment is formed partly by the latch 58 which includes a triangular recess 70 for the pointed end of the spare blade and a laterally projecting boss 72 having a configuration corresponding to the mounting aperture 48 and slot 54 of the blade 26, the boss 72 being arranged so that the spare blade is mounted with its cutting edge facing away from the open slot 30 extending longitudinally along the blade handle 12. The boss 72 also serves as a stop when blade 26 is folded into its sheathed position.
As will be apparent to persons skilled in the art, various modifications, adaptations and variations of the foregoing specific disclosure can be made without departing from the teaching of the present invention.
I claim:
1. In a folding knife having a handle, a pivot on the handle and a replaceable blade including a cutting edge, said blade being mounted on the pivot for pivotal movement through an arc of about between a folded position with the cutting edge housed within the handle and an extended position with the cutting edge exposed, the combination comprising a blade carrier mounted on the pivot and having blade locking means thereon preventing relative rotation between the blade and the carrier whereby the blade and the carrier rotatably move as a unit between said folded and extended positions, said carrier being enclosed within the handle and movable between said positions in response to movement of said blade, said blade having mounting means cooperating with said pivot for pivotably mounting the blade, said mounting means including means asymmetric to said pivot and adapted to cooperate with said blade locking means to mount said blade for pivotal movement of said locking means and said blade as a unit and to prevent reversible mounting of the blade on the carrier.
2. The folding knife of claim 1 wherein one of said cooperative blade locking means and asymmetric means is a protruding boss and the other is a recess for receiving said boss, said recess and boss cooperatively interlocking the blade on the carrier.
3. The folding knife of claim 1 wherein both the carrier and the blade are apertured for coaxial mounting on the pivot.
4. The folding knife of claim 1 wherein the carrier and the blade are coaxially mounted within the handle, the blade has a longitudinal center line extending through the pivot and the cooperating blade locking means and asymmetric means are offset from said longitudinal center line.
5. A replaceable knife blade for use in a folding knife having a pivot and a blade carrier including a boss extending asymmetrically to said pivot comprising an elongated blade body, a cutting edge extending along said body, mounting means adjacent one end of said body for mounting the blade on the carrier for pivotal movement about the pivot to permit folding of the blade and blade connecting means asymmetrically associated with said mounting means for cooperative engagement with said boss to require a specific nonreversible, mounted orientation of the blade on the carrier of the knife, wherein the mounting means and the blade connecting means are interconnected in the form of an asymmetrical keyhole, said mounting means comprising an enlarged circular aperture portion of the keyhole for mounting on the pivot and said blade connecting means comprising a relatively narrow elongated stem portion extending asymmetrically from said enlarged aperture, said stem keyhole portion cooperating with said boss to prevent reversible mounting of said blade on said carrier.
6. In a folding knife having a handle, a pivot on the handle and a replaceable blade including a cutting edge, said blade being mounted on the pivot for pivotal movement through an arc of about 180 between a folded position with the cutting edge housed within the handle and an extended position with the cutting edge exposed, the combination comprising a disc-like blade carrier mounted on the pivot and having blade locking protruding boss thereon preventing relative rotation between the blade and the carrier whereby the blade and the carrier rotatably move as a unit between said folded and extended positions, said carrier being enclosed within the handle and movable between said positions in response to movement of said blade, said blade having mounting means cooperating with said pivot for pivotably mounting the blade, said mounting means including a recess asymmetric to said pivot and adapted to cooperatively interlock with said blade locking boss to prevent reversible mounting of the blade on the carrier.
7. In a folding knife having a handle, a pivot on the handle and a replaceable blade including a cutting edge, said blade being mounted on the pivot for pivotal movement through an arc of about between a folded position with the cutting edge housed within the handle and an extended position with the cutting edge exposed, the combination comprising a blade carrier disc mounted on the pivot and having blade locking elongated boss extending tangentially of the pivot preventing relative rotation between the blade and the carrier whereby the blade and the carrier rotatably move as a unit between said folded and extended positions, said carrier being enclosed within the handle and movable between said positions in response to movement of said blade, said blade having mounting means cooperating with said pivot for pivotably mounting the blade, said mounting means including means asymmetric to said pivot and adapted to cooperate with said blade locking boss to prevent reversible mounting of the blade on the carrier.
8. A replaceable knife blade for use in a folding knife having a pivot and a blade carrier including a boss extending asymmetrically to said pivot comprising an elongated blade body, a cutting edge extending along said body, an aperture adjacent one end of said body for mounting the blade on the carrier for pivotal movement about the pivot to permit folding of the blade and a slot extending tangentially to said aperture and interconnected therewith for cooperative engagement with said boss to require specific nonreversible mounted orientation of the blade on the carrier of the knife.

Claims (8)

1. In a folding knife having a handle, a pivot on the handle and a replaceable blade including a cutting edge, said blade being mounted on the pivot for pivotal movement through an arc of about 180* between a folded position with the cutting edge housed within the handle and an extended position with the cutting edge exposed, the combination comprising a blade carrier mounted on the pivot and having blade locking means thereon preventing relative rotation between the blade and the carrier whereby the blade and the carrier rotatably move as a unit between said folded and extended positions, said carrier being enclosed within the handle and movable between said positions in response to movement of said blade, said blade having mounting means cooperating with said pivot for pivotably mounting the blade, said mounting means including means asymmetric to said pivot and adapted to cooperate with said blade locking means to mount said blade for pivotal movement of said locking means and said blade as a unit and to prevent reversible mounting of the blade on the carrier.
2. The folding knife of claim 1 wherein one of said cooperative blade locking means and asymmetric means is a protruding boss and the other is a recess for receiving said boss, said recess and boss cooperatively interlocking the blade on the carrier.
3. The folding knife of claim 1 wherein both the carrier and the blade are apertured for coaxial mounting on the pivot.
4. The folding knife of claim 1 wherein the carrier and the blade are coaxially mounted within the handle, the blade has a longitudinal center line extending through the pivot and the cooperating blade locking means and asymmetric means are offset from said longitudinal center line.
5. A replaceable knife blade for use in a folding knife having a pivot and a blade carrier including a boss extending asymmetrically to said pivot comprising an elongated blade body, a cutting edge extending along said body, mounting means adjacent one end of said body for mounting the blade on the carrier for pivotal movement about the pivot to permit folding of the blade and blade connecting means asymmetrically associated with said mounting means for cooperative engagement with said boss to require a specific nonreversible, mounted orientation of the blade on the carrier of the knife, wherein the mounting means and the blade connecting means are interconnected in the form of an asymmetrical keyhole, said mounting means comprising an enlarged circular aperture portion of the keyhole for mounting on the pivot and said blade connecting means comprising a relatively narrow elongated stem portion extending asymmetrically from said enlarged aperture, said stem keyhole portion cooperating with said boss to prevent reversible mounting of said blade on said carrier.
6. In a folding knife having a handle, a pivot on the handle and a replaceable blade including a cutting edge, said blade being mounted on the pivot for pivotal movement through an arc of about 180* between a folded position with the cutting edge housed within the handle and an extended position with the cutting edge exposed, the combination comprising a disc-like blade carrier mounted on the pivot and having blade locking protruding boss thereon preventing relative rotation between the blade and the carrier whereby the blade and the carrier rotatably move as a unit between said folded and extended positions, said carrier being enclosed within the handle and movable between said positions in response to movement of said blade, said blade having mounting means cooperating with said pivot for pivotably mounting the blade, said mounting means including a recess asymmetric to said pivot and adapted to cooperatively interlock with said blade locking boss to prevent reversible mounting of the blade on the carrier.
7. In a folding knife having a handle, a pivot on the handle and a replaceable blade including a cutting edge, said blade being mounted on the pivot for pivotal movement through an arc of about 180* between a folded position with the cutting edge housed within the handle and an extended position with the cutting edge exposed, the combination comprising a blade carrier disc mounted on the pivot and having blade locking elongated boss extending tangentially of the pivot preventing relative rotation between the blade and the carrier whereby the blade and the carrier rotatably move as a unit between said folded and extended positions, said carrier being enclosed within the handle and movable between said positions in response to movement of said blade, said blade having mounting means cooperating with said pivot for pivotably mounting the blade, said mounting means including means asymmetric to said pivot and adapted to cooperate with said blade locking boss to prevent reversible mounting of the blade on the carrier.
8. A replaceable knife blade for use in a folding knife having a pivot and a blade carrier including a boss extending asymmetrically to said pivot comprising an elongated blade body, a cutting edge extending along said body, an aperture adjacent one end of said body for mounting the blade on the carrier for pivotal movement about the pivot to permit folding of the blade and a slot extending tangentially to said aperture and interconnected therewith for cooperative engagement with said boss to require specific nonreversible mounted orientation of the blade on the carrier of the knife.
US391604A 1973-08-27 1973-08-27 Folding knife and replaceable blade therefor Expired - Lifetime US3896546A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US391604A US3896546A (en) 1973-08-27 1973-08-27 Folding knife and replaceable blade therefor
JP49096952A JPS5921634B2 (en) 1973-08-27 1974-08-23 folding knife

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US391604A US3896546A (en) 1973-08-27 1973-08-27 Folding knife and replaceable blade therefor

Publications (1)

Publication Number Publication Date
US3896546A true US3896546A (en) 1975-07-29

Family

ID=23547258

Family Applications (1)

Application Number Title Priority Date Filing Date
US391604A Expired - Lifetime US3896546A (en) 1973-08-27 1973-08-27 Folding knife and replaceable blade therefor

Country Status (2)

Country Link
US (1) US3896546A (en)
JP (1) JPS5921634B2 (en)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5060379A (en) * 1989-12-04 1991-10-29 Neely Vaughn O Folding knife apparatus
US6134788A (en) * 1999-06-30 2000-10-24 Chen; Tsai-Ching Tool holder
US20040139613A1 (en) * 2002-07-30 2004-07-22 Onion Kenneth J. Folding knife with removable blade
US20050097755A1 (en) * 2003-10-31 2005-05-12 Galyean Timothy J. Folding knife having a locking mechanism
US20050241154A1 (en) * 2003-06-04 2005-11-03 Lake Ronald W Folding knife having a locking mechanism
US20060070243A1 (en) * 2002-07-30 2006-04-06 Kai U.S.A., Ltd., Dba Kershaw Knives Folding knife with removable blade
US7174590B1 (en) 2004-03-18 2007-02-13 Philip J Quenzi Handheld multi-tool
US20100192382A1 (en) * 2009-02-05 2010-08-05 Wade Burch Hand saw
US20110056342A1 (en) * 2009-09-04 2011-03-10 Satisloh Gmbh Device for the Rotary Machining of Optical Workpieces of Materials of Non-Brittle Hardness
USD747637S1 (en) 2014-10-31 2016-01-19 Outdoor Edge Cutlery Corporation Double blade knife
USD751882S1 (en) 2012-12-26 2016-03-22 Outdoor Edge Cutlery Corporation Replaceable blade
US9586329B2 (en) 2013-06-13 2017-03-07 Fiskars Brands, Inc. Skinning knife with removable blade
US9687987B2 (en) 2012-10-26 2017-06-27 Outdoor Edge Cutlery Corporation Folding knife with replaceable blade
USD806499S1 (en) 2015-01-20 2018-01-02 Outdoor Edge Cutlery Corporation Knife
USD806498S1 (en) 2016-05-27 2018-01-02 Outdoor Edge Cutlery Corporation Knife
USD848812S1 (en) 2016-01-15 2019-05-21 Outdoor Edge Cutlery Corporation Folding knife
US10493641B2 (en) 2012-10-26 2019-12-03 Outdoor Edge Cutlery Corporation Folding knife with replaceable blade
USD869254S1 (en) 2013-10-25 2019-12-10 Outdoor Edge Cutlery Corporation Blade
USD909170S1 (en) 2019-01-08 2021-02-02 Outdoor Edge Cutlery Corporation Knife
CN112654464A (en) * 2018-09-07 2021-04-13 迈克尔·奥唐纳 Modular tool device
USD918683S1 (en) 2019-10-31 2021-05-11 Outdoor Edge Cutlery Corporation Replaceable blade
USD926551S1 (en) 2020-01-21 2021-08-03 Outdoor Edge Cutlery Corporation Knife
USD989580S1 (en) 2021-04-16 2023-06-20 Outdoor Edge Cutlery, Llc Replaceable blade
USD993738S1 (en) * 2021-02-03 2023-08-01 Yunyan Zeng Multifunctional tool
USD1009587S1 (en) 2022-03-11 2024-01-02 Outdoor Edge Cutlery, Llc Caping blade

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4660284A (en) * 1985-07-17 1987-04-28 The Stanley Works Folding pocket saw

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US304481A (en) * 1884-09-02 John a
US1087342A (en) * 1912-10-21 1914-02-17 Nagle Re Blade Knife Company Knife.
US3063147A (en) * 1959-07-01 1962-11-13 Kastar Inc Adjustable tool
US3641667A (en) * 1970-01-29 1972-02-15 Norbert Leopoldi Carton cutter or the like

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US304481A (en) * 1884-09-02 John a
US1087342A (en) * 1912-10-21 1914-02-17 Nagle Re Blade Knife Company Knife.
US3063147A (en) * 1959-07-01 1962-11-13 Kastar Inc Adjustable tool
US3641667A (en) * 1970-01-29 1972-02-15 Norbert Leopoldi Carton cutter or the like

Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5060379A (en) * 1989-12-04 1991-10-29 Neely Vaughn O Folding knife apparatus
US6134788A (en) * 1999-06-30 2000-10-24 Chen; Tsai-Ching Tool holder
US20040139613A1 (en) * 2002-07-30 2004-07-22 Onion Kenneth J. Folding knife with removable blade
US20060070243A1 (en) * 2002-07-30 2006-04-06 Kai U.S.A., Ltd., Dba Kershaw Knives Folding knife with removable blade
US7370421B2 (en) 2002-07-30 2008-05-13 Kai U.S.A., Ltd. Folding knife with removable blade
US7716839B2 (en) 2002-07-30 2010-05-18 Kai U.S.A., Ltd. Folding knife with removable blade
US20050241154A1 (en) * 2003-06-04 2005-11-03 Lake Ronald W Folding knife having a locking mechanism
US7140110B2 (en) 2003-06-04 2006-11-28 Lake Ronald W Folding knife having a locking mechanism
US20050097755A1 (en) * 2003-10-31 2005-05-12 Galyean Timothy J. Folding knife having a locking mechanism
US7174590B1 (en) 2004-03-18 2007-02-13 Philip J Quenzi Handheld multi-tool
US20070101508A1 (en) * 2004-03-18 2007-05-10 Quenzi Philip J Handheld multi-tool
US7360267B2 (en) 2004-03-18 2008-04-22 Philip J Quenzi Handheld multi-tool
US8707564B2 (en) 2009-02-05 2014-04-29 Milwaukee Electric Tool Corporation Hand saw
US20100192382A1 (en) * 2009-02-05 2010-08-05 Wade Burch Hand saw
US20110056342A1 (en) * 2009-09-04 2011-03-10 Satisloh Gmbh Device for the Rotary Machining of Optical Workpieces of Materials of Non-Brittle Hardness
US8806997B2 (en) * 2009-09-04 2014-08-19 Satisloh Gmbh Device for lathe machining of optical workpieces of materials of non-brittle hardness
US11084177B2 (en) 2012-10-26 2021-08-10 Outdoor Edge Cutlery Corporation Folding knife with replaceable blade
US9687987B2 (en) 2012-10-26 2017-06-27 Outdoor Edge Cutlery Corporation Folding knife with replaceable blade
US11707857B2 (en) 2012-10-26 2023-07-25 Outdoor Edge Cutlery, Llc Knife with replaceable blade
US11780102B2 (en) 2012-10-26 2023-10-10 Outdoor Edge Cutlery, Llc Folding knife with replaceable blade
US10518425B2 (en) 2012-10-26 2019-12-31 Outdoor Edge Cutlery Corporation Folding knife with replaceable blade
USD1023715S1 (en) 2012-10-26 2024-04-23 Outdoor Edge Cutlery, Llc Knife
US10493641B2 (en) 2012-10-26 2019-12-03 Outdoor Edge Cutlery Corporation Folding knife with replaceable blade
USD751882S1 (en) 2012-12-26 2016-03-22 Outdoor Edge Cutlery Corporation Replaceable blade
US9586329B2 (en) 2013-06-13 2017-03-07 Fiskars Brands, Inc. Skinning knife with removable blade
US10349664B2 (en) 2013-06-13 2019-07-16 Fiskars Brands, Inc. Skinning knife with removable blade
USD1020426S1 (en) 2013-10-25 2024-04-02 Outdoor Edge Cutlery, Llc Knife
USD869254S1 (en) 2013-10-25 2019-12-10 Outdoor Edge Cutlery Corporation Blade
USD747637S1 (en) 2014-10-31 2016-01-19 Outdoor Edge Cutlery Corporation Double blade knife
USD891216S1 (en) 2014-10-31 2020-07-28 Outdoor Edge Cutlery Corporation Knife
USD843808S1 (en) 2014-10-31 2019-03-26 Outdoor Edge Cutlery Corporation Knife
USD795040S1 (en) 2014-10-31 2017-08-22 Outdoor Edge Cutlery Corporation Double blade knife
USD806499S1 (en) 2015-01-20 2018-01-02 Outdoor Edge Cutlery Corporation Knife
USD848812S1 (en) 2016-01-15 2019-05-21 Outdoor Edge Cutlery Corporation Folding knife
USD806498S1 (en) 2016-05-27 2018-01-02 Outdoor Edge Cutlery Corporation Knife
CN112654464A (en) * 2018-09-07 2021-04-13 迈克尔·奥唐纳 Modular tool device
USD919390S1 (en) 2019-01-08 2021-05-18 Outdoor Edge Cutlery Corporation Replaceable blade
USD909170S1 (en) 2019-01-08 2021-02-02 Outdoor Edge Cutlery Corporation Knife
USD983630S1 (en) 2019-10-31 2023-04-18 Outdoor Edge Cutlery, Llc Replaceable blade
USD918683S1 (en) 2019-10-31 2021-05-11 Outdoor Edge Cutlery Corporation Replaceable blade
USD926551S1 (en) 2020-01-21 2021-08-03 Outdoor Edge Cutlery Corporation Knife
USD993738S1 (en) * 2021-02-03 2023-08-01 Yunyan Zeng Multifunctional tool
USD989580S1 (en) 2021-04-16 2023-06-20 Outdoor Edge Cutlery, Llc Replaceable blade
USD1009587S1 (en) 2022-03-11 2024-01-02 Outdoor Edge Cutlery, Llc Caping blade

Also Published As

Publication number Publication date
JPS5050800A (en) 1975-05-07
JPS5921634B2 (en) 1984-05-21

Similar Documents

Publication Publication Date Title
US3896546A (en) Folding knife and replaceable blade therefor
US5940970A (en) Utility knife
US4261104A (en) Holder for detachable blades
US4040181A (en) Locking blade knife
EP0128711B1 (en) Utility knife
US4541175A (en) Knife
US2461941A (en) Folding gaff
US7059053B2 (en) Folding knife with blade lock
US4068375A (en) Heavy duty retractable blade utility knife
US4612706A (en) Folding knife
FI97427B (en) Operating mechanism for an encapsulated electrical contact
US5727320A (en) Utility knife with blade magazine
US5025557A (en) Locking folding knife
US6591505B2 (en) Folding knife with a locking catch
US20040134075A1 (en) Folding knife
US3843224A (en) Detachable cord set for electric device
US5010645A (en) Foldable T-shaped shaver
US4031621A (en) Hand tools
WO2018188201A1 (en) Mechanism capable of preventing drawer from slipping out
FR2632886A1 (en) Mechanical razor with small barrel
US4073057A (en) Folding blade knife
US6000135A (en) Dry shaving apparatus with guard member
US4524921A (en) Fishing reel
US1735751A (en) Safety razor
US1370995A (en) Jack-knife