# US 5,333,890 A · Process of manufacturing a ski and a ski produced by the process > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,333,890 A - Document ID: US5333890A - Status: Granted - Kind: A - Application number: 07/497,353 - Filed: 1990-03-22 - Granted: 1994-08-02 - Earliest claimed: 1989-03-23 - Assignees: Salomon S.A. - Inventors: Alain Bejean - Web page: https://patentgrep.com/patent/US5333890A ## CPC - A63C 5/12: Making thereof; Selection of particular materials (materials for the running sole A63C5/056) - A63C: SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE (water skis B63B32/00, B63B34/00) ## Abstract A ski and a method of forming a ski. The ski includes a lower element and an upper element, each having the shape of a beam casing. The lower element has an upper surface that has either a longitudinally extending groove or a longitudinally extending projection and the upper element has a lower surface that has a groove or a projection that has a transverse cross-section that is respectively complementary to a transverse cross-section of the groove or to a transverse cross-section of the projection of the lower element, and in which the groove or projection of the lower element is nested in the projection or groove, respectively, of the upper element. Depending upon the nature of the desired response characteristics of the ski, the interior of the upper and lower elements can be selectively filled with specific materials or left empty. ## Claims ### Claim 1 A ski comprising: (a) a lower element having the shape of a beam casing; (b) an upper element having the shape of a beam casing; wherein the ski has a body comprised of said lower element and said upper element, wherein said lower element has an upper surface that has a longitudinally extending groove and the upper element has a lower surface that has a longitudinally extending projection that has a transverse cross-section that is complementary to a transverse cross-section of said groove of said lower element, wherein said groove of said lower element is engaged and affixed to said projection of the lower surface of said upper element, wherein said upper element extends upwardly beyond said upper surface of said lower element to form a single rib, and wherein said rib has a width less than a width of said lower element. ### Claim 2 (depends on 1) A ski according to claim 1, wherein said groove of said upper surface of said lower shaped element and said projection of said lower surface of said upper shaped element each have a transverse cross-section in the form of a V. ### Claim 3 (depends on 1) A ski according to claim 1, wherein said groove of said upper surface of said lower shaped element and said projection of said lower surface of said upper shaped element each have a rectangular transverse cross-section. ### Claim 4 (depends on 1) The ski of claim 1, wherein each of said upper element and said lower element has a hollow interior portion. ### Claim 5 (depends on 4) The ski of claim 4, wherein said hollow interior portion of said upper element is filled with a quantity of material. ### Claim 6 (depends on 5) The ski of claim 5, wherein said hollow interior portion of said lower element is filled with a quantity of material. ### Claim 7 (depends on 4) The ski of claim 4, wherein said hollow interior portion of said lower element is filled with a quantity of material. ### Claim 8 (depends on 5) The ski of claim 5, wherein said material is selected from a group consisting of elastic material and rigid material. ### Claim 9 (depends on 6) The ski of claim 6, wherein said material is selected from a group consisting of elastic material and rigid material. ### Claim 10 (depends on 7) The ski of claim 7, wherein said material is selected from a group consisting of elastic material and rigid material. ### Claim 11 (depends on 5) The ski of claim 5, wherein said material is synthetic foam. ### Claim 12 (depends on 6) The ski of claim 6, wherein said material is synthetic foam. ### Claim 13 (depends on 7) The ski of claim 7, wherein said material is synthetic foam. ### Claim 14 (depends on 1) The ski of claim 1, wherein said rib has side walls and said lower element has side walls, and wherein said side walls of said rib are distinct from said side walls of said lower element. ### Claim 15 (depends on 1) The ski of claim 1, wherein said longitudinally extending groove in said upper surface of said lower element comprises a single groove in said upper surface of said lower element and wherein said projection of said lower surface of said upper element comprises a single projection of said lower surface of said upper element. ### Claim 16 (depends on 1) The ski of claim 1, wherein said lower element has a predeterminate width and said upper element has a width that is less than said predeterminate width. ### Claim 17 (depends on 1) The ski of claim 1, wherein said upper element has a transverse cross-section comprising a closed convex periphery. ### Claim 18 (depends on 1) The ski of claim 1, wherein said upper element has a transverse cross-section in the form of a convex polygon. ### Claim 19 (depends on 18) The ski of claim 18, wherein said convex polygon is a pentagon. ### Claim 20 (depends on 18) The ski of claim 18, wherein said convex polygon is a quadrilateral. ### Claim 21 (depends on 20) The ski of claim 20, wherein said quadrilateral is a rectangle. ### Claim 22 A ski comprising a longitudinally extending rib, said ski formed by at least two unitarily formed longitudinally extending elements, said two unitarily formed longitudinally extending elements comprising an upper element and a lower element, wherein said upper element comprises said rib, wherein said lower element has a lower surface, wherein said upper element has a lower configuration which is shaped for complementary engagement with an upper configuration of said lower element, wherein said upper element has a longitudinally and downwardly extending projection, wherein said lower element has a longitudinally and upwardly facing groove, wherein said projection of said upper element is engaged within said groove of said lower element and extends upwardly beyond said lower element, and wherein said rib of said upper element constitutes a single rib of said ski. ### Claim 23 (depends on 22) The ski of claim 22, wherein said lower surface of said lower element is exposed for sliding upon a surface. ### Claim 24 (depends on 22) The ski of claim 22, further comprising a sole attached to said lower surface of said lower element. ### Claim 25 A ski comprising a longitudinally extending rib, said ski formed by at least two unitarily formed longitudinally extending elements, said two unitarily formed longitudinally extending elements comprising an upper element and a lower element, wherein said upper element comprises said rib, wherein said lower element has a lower surface, wherein said upper element has a lower configuration and said lower element has an upper configuration, wherein lower configuration of said upper element is engaged with said upper configuration of said lower element, wherein each of said upper element and said lower element has a hollow interior portion, wherein said hollow interior portion of said upper element is filled with a quantity of material, and wherein said hollow interior of said lower element is empty. ### Claim 26 (depends on 25) The ski of claim 25, wherein said material is selected from a group consisting of elastic material and rigid material. ### Claim 27 (depends on 25) The ski of claim 25, wherein each of said upper element and said lower element has an enclosed periphery and wherein said lower configuration of said upper element comprises a lower configuration of an enclosed periphery of said upper element and said upper configuration of said lower element comprises an upper configuration of an enclosed periphery of said lower element. ### Claim 28 A ski comprising a longitudinally extending rib, said ski formed by at least two unitarily formed longitudinally extending elements, said two unitarily formed longitudinally extending elements comprising an upper element and a lower element, wherein said upper element comprises said rib, wherein said lower element has a lower surface, wherein said upper element has a lower configuration which is shaped for complementary engagement with an upper configuration of said lower element, wherein each of said upper element and said lower element has a hollow interior portion, wherein said hollow interior portion of said lower element is filled with a quantity of material, and wherein said hollow interior of said upper element is empty. ### Claim 29 (depends on 28) The ski of claim 28, wherein said material is selected from a group consisting of elastic material and rigid material. ### Claim 30 (depends on 25) The ski of claim 25, wherein said material is synthetic foam. ### Claim 31 (depends on 28) The ski of claim 28, wherein said material is synthetic foam. ### Claim 32 (depends on 25) The ski of claim 25, wherein said lower surface of said lower element is exposed for sliding upon a surface. ### Claim 33 (depends on 25) The ski of claim 25, further comprising a sole attached to said lower surface of said lower element. ### Claim 34 (depends on 28) The ski of claim 28, wherein said lower surface of said lower element is exposed for sliding upon a surface. ### Claim 35 (depends on 28) The ski of claim 28, further comprising a sole attached to said lower surface of said lower element. ### Claim 36 A ski comprising a longitudinally extending rib, said ski formed by at least two unitarily formed longitudinally extending elements, said two unitarily formed longitudinally extending elements comprising an upper element and a lower element, wherein said upper element comprises said rib, wherein said lower element has a lower surface, wherein said upper element has a lower configuration which is shaped for complementary engagement with an upper configuration of said lower element, and wherein each of said upper element and said lower element has a hollow enclosed interior portion. ### Claim 37 (depends on 36) The ski of claim 36, wherein at least one of said upper element and said lower element has a filling within said hollow enclosed interior portion thereof.