Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
  • B26B1/00—Hand knives with adjustable blade; Pocket knives
  • B26B1/02—Hand knives with adjustable blade; Pocket knives with pivoted blade

Definitions

• the invention relates to hand folding knives, whether or not provided with catch notches.
• - longitudinal plane of the knife a plane parallel to the median plane of the blade.
• - longitudinal direction of the knife a direction parallel to the longitudinal plane going substantially from the free end of the handle to the free end of the blade, the knife being in the open position.
• a knife according to the invention therefore essentially consists of a handle and a blade articulated around an axis of rotation.
• This articulation is constituted by a hollow socket whose axial opening with an axis perpendicular to the longitudinal plane of the knife, and whose dimension is adapted to the size of the link or of the fixing used, crosses the handle from side to side, and is integral in rotation with the knife blade.
• This opening may be cylindrical in shape, but preferably it will have a flared shape towards the outside, for example, in the form of a half-torus. This form allows an easier introduction of the link or adapts better to the curvature of the binding (padlock handle, mountaineering carabiners).
• This sleeve is generally integral in rotation with at least one operating means, outside the handle, and allowing the opening and closing of the blade.
• This operating means consists, for example, of one or two circular knobs.
• the wheel is striated externally and / or has external reliefs, to be easily actuated with one hand with the thumb or another finger.
• the locking catch is constituted by at least one elastic tongue, one of the ends of which is integral with the handle of the knife, and the other "free end of which engages by spring effect, in an adequate housing for the assembly. knurled sleeve when the blade is fully opened This full opening is determined by the support of the blade heel on a stop placed in the knife handle.
• the tongue is either elastic or rigid and articulated at their base around an axis of rotation substantially parallel to the longitudinal plane of the knife, and subjected to the action of an elastic device (spring, elastomer, etc.) acting towards the 'outside.
• the tongue has, in their active part, a flat and elongated shape; the length of the tongue is arranged either in a substantially radial direction, or in a direction substantially tangential to the rotational movement of the blade on the handle.
• the housing located in the sleeve-wheel assembly has in section parallel to the axis of rotation, and in a tangential direction relative to the rotational movement, the shape of a right prism of trapezoidal section whose large base is directed towards the end of the tongue, and whose bearing plane thereon has an inclination of 8 ° to 12 ° relative to the axis of rotation.
• This arrangement makes it possible, in the open position of the knife, to block the blade and to compensate for mechanical play, due to the tolerances of machining and initial assembly and / or to the wear in service of the moving parts.
• the support surfaces of the end of the tongues preferably have the same inclination.
• one or two push buttons can be provided in the handle, to push the tongue outwards, and thus allow the rotation of the blade assembly - sleeve - wheel relative to the handle.
• the tongue can also be used, the blade of the knife being in the closed position, to create hard friction, preventing accidental opening of the blade.
• a housing in the shape of a trapezoidal prism, analogous to that of the stop notch, is also formed in the sleeve-wheel assembly, but whose inclination is from 45 ° to 80 ° in order to allow the separation towards the inside of the tongue under a slight force of opening of the blade exerted ⁇ suf the blade ⁇ uA ⁇ r blade.
• FIG. 3 sectional view along the line AA in FIG. 1,
• FIG. 4 sectional view along line BB of FIG. 3,
• FIG. 7 detail, sectional view along the line DD of FIG. 6,
• curvilinear arrow indicates the direction in which the knife is closed.
• a knife according to the invention consists of a blade (1) and a handle (2) movable in rotation and with gentle friction, one with respect to the other, around an axis perpendicular to the longitudinal plane (4) of the knife.
• the blade (1) is sharpened on one of the sides (5) and has a non-sharp edge (6) on the other.
• the handle consists of a spacer (7), two plates (8) made of sheet steel and a trim (9) made of wood, horn, plastic or rubberized material, etc. held in place by rivets (10).
• the articulation between the handle (2) and the blade (1) being constituted by a steel bush (11) having in its middle a hexagonal periphery (12) perpendicular to the axis (3) which is embedded in an opening hexagonal blade (1) of the knife.
• This sleeve (11) is pierced along the axis (3) with a circular hole (1a ;, and is fé ⁇ two knurls (14) in steel, this connection is made by any known means such as soldering, gluing, crimping, shrinking, etc.
• the welding (15) can be carried out using a laser beam.
• This tongue (16) as the plate (8) are made of a steel treated after shaping and machining, to give it the required elasticity.
• the internal surface (14 ') of the thumbwheel (14) comprises a prismatic trapezoidal housing, the generators of which are substantially parallel to the longitudinal direction of the knife (20), and the blanks of which form an angle of 10 ° with the axis ( 3).
• the device is completed by a push button (22) integral with the handle (2) which, by pressing inwards releases the free end of the tongue (16) from the housing (19) of the thumb wheel (14), this which unlocks the blade and allows the knife to close in the direction of the curved arrow.
• the knife can comprise two tongues, each located in one of the plates (8), the release of the catch then requiring a double action in opposite directions on the two pushbuttons.
• FIG 6 shows a variant of the stopper.
• the elastic tongue (16) is attached to the inside of the handle (2) and is fixed there, at its base, for example by two rivets (23).
• the tongue (16) is arranged tangentially with respect to the movement of the blade and its free end (24), machined at a bevel with an angle of 10 °, and engages in the housing (19) of the wheel (14).
• the free end (24) of the tongue (16) is approximately located on a radius passing through the axis (3).
• the handle can also be in one piece (Figure 8) and be made of metal or plastics, possibly reinforced with short fibers (glass, carbon) and obtained by molding, including the tab (s) (16).
• the tabs are accessible from the outside of the handle.
• reinforced plastics and for better elasticity of the tongue, it is preferable that it is reinforced by long fibers, arranged along its length.

Landscapes

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

Applications Claiming Priority (3)

Publications (2)

Family

ID=8849186

Family Applications (1)

Country Status (7)

Families Citing this family (10)

Family Cites Families (6)

• 2000
  • 2000-04-12 FR FR0004713A patent/FR2807689B1/fr not_active Expired - Fee Related
• 2001
  • 2001-04-12 AT AT01925637T patent/ATE243095T1/de not_active IP Right Cessation
  • 2001-04-12 EP EP01925637A patent/EP1194269B1/de not_active Expired - Lifetime
  • 2001-04-12 WO PCT/FR2001/001139 patent/WO2001076831A1/fr active IP Right Grant
  • 2001-04-12 US US10/009,517 patent/US6618946B2/en not_active Expired - Lifetime
  • 2001-04-12 DE DE60100384T patent/DE60100384T2/de not_active Expired - Lifetime
  • 2001-04-12 ES ES01925637T patent/ES2199929T3/es not_active Expired - Lifetime

Non-Patent Citations (1)

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