# US 5,706,584 A · Single-blade cooking knife > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,706,584 A - Document ID: US5706584A - Status: Granted - Kind: A - Application number: 08/670,424 - Filed: 1996-06-26 - Granted: 1998-01-13 - Earliest claimed: 1996-06-26 - Assignees: Dbd Srl - Inventors: Leandro Bernardini - Web page: https://patentgrep.com/patent/US5706584A ## CPC - B26B 1/042: {by a spring biased locking lever pivoting around an axis parallel to the pivot axis of the blade} - B26B: HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR (for harvesting A01D; for horticulture, for forestry A01G; for butchering or meat treatment A22; for manufactering or repairing footwear A43D; nail clippers or cutters A45D29/02; kitchen equipment A47J; {vegetable slicers, julienne cutters and similar devices and holders therefor, B26D3/28}; for surgical purposes A61B; for metal B23D; cutting by abrasive fluid jets B24C5/02; plier-like tools with cutting edges B25B7/22; pincers B25C11/02; handles for hand implements, in general B25G; guillotine-type cutters B26D; {perforating by non-mechanical means, e.g. by fluid jet, B26F1/26}; for erasing B43L19/00; for textile materials D06H) ## Abstract A single bladed cooking knife having two aligned cutting edges. An enclosure for the knife is provided in which an upper half-shell are joined and a lower half-shell joined to each other to form an enclosure for the knife; one end of the knife is coupled to the enclosure for pivoting the knife from a first position within the enclosure with one of the cutting edges positioned within the enclosure and another of the cutting edges being external of the enclosure to a second position with both of the cutting edges external of the enclosure. The knife blade is lockable, in the first and said second positions, and the knife blade is associated with a mechanism for unlocking the knife blade to move the knife blade from the first position to the second position and vice-versa. ## Claims ### Claim 1 A single bladed cooking knife comprising: a single bladed cooking knife having two different cutting portions along a single cutting edge, one of said cutting portions being in the form of a saw-toothed edge part and another of said cutting portions being in the form of a half-moon shaped cutting part; an enclosure for said knife including an upper half-shell and a lower half-shell joined to each other; means coupling one end of said knife to said enclosure for pivoting said knife from a first position within said enclosure with said one of said cutting portions being positioned within said enclosure and the other of said cutting portions positioned external of said enclosure to a second position with both of said cutting portions external of said enclosure; means for locking said knife in said first and said second positions; and means for releasing said locking means to move said knife from said first position to said second position and vice-versa. ### Claim 2 (depends on 1) The cooking knife as claimed in claim 1, including a welding joining the said two half-shells. ### Claim 3 (depends on 1) The cooking knife as claimed in claim 1, wherein said locking means comprises a pair of projections at one end of said knife and a projection receiving opening associated with said enclosure for receiving one of said pair of projections for locking said knife in said first position and for receiving the other of said pair of projections for locking said knife in said second position. ### Claim 4 (depends on 1) The knife as claimed in claim 1, wherein said coupling means includes a pivot associated with said enclosure, and said knife has one end articulated to said pivot for pivotal movement about said pivot from said one position to said second position. ### Claim 5 (depends on 3) The knife as claimed in claim 3, wherein said coupling means includes a pivot associated with said enclosure, and said knife having one end articulated to said pivot for pivotal movement about said pivot from said one position to said second position. ### Claim 6 (depends on 5) The knife as claimed in claim 5, wherein said projections are displaced from each other by an angle of 180.degree. and an axis passing through said projections is orthogonal to a central axis of said pivot. ### Claim 7 (depends on 1) The cooking knife as claimed in claim 1, wherein said releasing means includes lever means associated with said locking means for disengaging said locking means to enable said knife blade to be moved from said first position to said second position and vice-versa. ### Claim 8 A single bladed cooking knife having two cutting edges comprising: an enclosure for said knife including an upper half-shell and a lower half-shell joined to each other; means coupling one end of said knife to said enclosure for pivoting said knife from a first position within said enclosure with one of said cutting edges being positioned within said enclosure and another of said cutting edges positioned external of said enclosure to a second position with both of said cutting edges external of said enclosure; means for locking said knife in said first and said second positions; and means for releasing said locking means to move said knife from said first position to said second position and vice-versa, said releasing means including a lever pivotable about a joint coupled with said upper half shell, one end of said lever being associated with said locking means and the other end of said lever including means to move said lever to pivot said lever about said joint to move said one end for disengagement of said locking means. ### Claim 9 A cooking knife including a cutting blade having two edged parts with only a single cutting edge comprising: a plastic oblong hollow shell haft formed by an upper half-shell and a lower half-shell joined with a weld line joining said upper half-shell and said lower half-shell; a blade provided in said shell haft and articulated on a pin joint passing through a hole provided at one end of said blade, said blade being manually movable by hand for engagement with one of two spaced ends; said two spaced ends including a front end and a rear end spaced from each other and formed at ends of a slot provided in said lower half-shell to provide for two positions for said blade; said manual moving of said blade to bring it into said positions, on said front end with said cutting edge totally exposing a straight saw-toothed edged part and, a half-moon shaped cutting part forming said two-edged parts and, on said back end with said cutting edge of the blade in a partial re-entry into said shell haft, only said half-moon cutting part shaped being exposed and having an inside edged part to complete the blade having said half-moon shaped part forming the saw-toothed edged part which is contained within said shell haft; means for locking the blade in a position on each of the spaced ends by fitting up of a constraint means including an iron leaf spring supported on one end between the half-shells and on the other end by a hook and lever arrangement, said lever being movable on a joint and associated with a push-button and said lever and hook being activated in response to said push button; engagement means on said leaf spring for engaging at least one rise, and removable therefrom in response to said push button for enabling said knife blade to be manually movable relative to said oblong shell; and said blade being manually movable from one end to the other end in response to activation of said push button for raising the leaf spring to permit one of said rises to be disengaged from the engagement means. ### Claim 10 (depends on 8) The cooking knife as claimed in claim 8, wherein said lever means includes a lever pivotable about a joint coupled with said upper half shell, one end of said lever being associated with said locking means and the other end of said lever including means to move said lever to pivot said lever about said joint to move said one end for disengagement of said locking means. ### Claim 11 (depends on 9) The cooking knife as claimed in claim 9, wherein said cutting blade having two edged parts includes a first cutting portion in the form of a saw-toothed edged part and a second cutting portion in the form of a half moon shaped cutting part. ### Claim 12 (depends on 8) The cooking knife as claimed in claim 8, wherein said locking means comprises a pair of projections at one end of said knife and a projection receiving opening associated with said enclosure for receiving one of said pair of projections for locking said knife in said first position and for receiving the other of said pair of projections for locking said knife in said second position. ### Claim 13 (depends on 8) The knife as claimed in claim 8, wherein said locking means includes a leaf spring having one end coupled to said enclosure at said rear running end and said other end including a hook, and said one end of said lever including a flat bed body for receiving said hook for movement of said other end of said spring. ### Claim 14 (depends on 13) The cooking knife as claimed in claim 13, wherein said locking means comprises a pair of projections at one end of said knife and a projection receiving opening associated with said enclosure for receiving one of said pair of projections for locking said knife in said first position and for receiving the other of said pair of projections for locking said knife in said second position. ### Claim 15 (depends on 14) The knife as claimed in claim 14, wherein said spring includes proximate to said other end a hole for receiving one of said pair of projections for locking said knife in one of said pair of positions, and locking means including a push button at said other end of said lever for pivoting said lever about said point to move said one of said projections received in said hole for releasing said one of said projections for unlocking said knife from said spring for movement of said knife from said one position to said other position and vice-versa. ### Claim 16 (depends on 15) The knife as claimed in claim 15, wherein said coupling means includes a pivot associated with said enclosure, and said knife having one end articulated to said pivot for pivotal movement about said pivot from said one position to said second position. ### Claim 17 (depends on 16) The knife as claimed in claim 16, wherein said projections are displaced from each other by an angle of 180.degree. and an axis passing through said projections is orthogonal to a central axis of said pivot. ### Claim 18 (depends on 9) The cooking knife as claimed in claim 9, wherein said two half-shells are joined by a weldment. ### Claim 19 (depends on 9) The cooking knife as claimed in claim 9, wherein said oblong shell provides for an anatomy haft for raising a gripping condition. ### Claim 20 (depends on 9) The knife as claimed in claim 9, including a key having a central small plate for activation of said lever.