# US 4,392,313 A · Shoe for use with a cross-country ski > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,392,313 A - Document ID: US4392313A - Status: Granted - Kind: A - Application number: 06/122,698 - Filed: 1980-02-19 - Granted: 1983-07-12 - Earliest claimed: 1977-04-13 - Inventors: Josef Linecker - Web page: https://patentgrep.com/patent/US4392313A ## CPC - A63C 9/20: Non-self-releasing bindings with special sole edge holders instead of toe-straps - A43B 5/0411: {for cross-country} - A63C 11/16: Special devices on boots for fastening skis thereto (A63C9/00 takes precedence) - A63C: SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE (water skis B63B32/00, B63B34/00) - A43B: CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR ## Abstract A cross-country ski boot comprises a sole of synthetic resin and including a heel portion defining a recess of V-shaped cross section and upwardly projecting lateral edges forwardly of the heel portion. ## Claims ### Claim 1 A ski shoe for use with a cross-country ski having a web projecting from the ski surface and extending in the longitudinal direction of the ski, comprising a sole means of synthetic resin, the sole means including a heel portion defining a recess of V-shaped cross section extending in said direction for engaging the web and thereby holding the heel portion on the ski against lateral displacement, and upwardly projecting lateral edges arranged only forwardly of the heel portion. ### Claim 2 (depends on 1) The ski shoe of claim 1, wherein the sole means comprises an outer sole and an inner sole, the lateral edges projecting from the inner sole. ### Claim 3 (depends on 1) The ski shoe of claim 1, wherein the upwardly projecting lateral edges define a series of slots extending substantially verticaly to the sole means and sub-dividing the lateral edges into overlapping sections. ### Claim 4 (depends on 1) The ski shoe of claim 1, further comprising a flap integral with the sole and arranged to cover the tip of the shoe. ### Claim 5 (depends on 1) The ski shoe of claim 1 further comprising beveled transition zones between the underside of the sole and the V-shaped recess. ### Claim 6 (depends on 1) The ski shoe of claim 1, further comprising elastic inserts in the sole means. ### Claim 7 (depends on 1) The ski shoe of claim 1, further comprising a forwardly extending portion opposite the heel portion and laterally extending parts having a ribbed underside and leaving therebetween a longitudinally extending sole part for engagement with the ski. ### Claim 8 A ski shoe for use with a cross-country ski having a three-armed web projecting from the ski surface and one arm extending in the longitudinal direction of the ski and two arms diverging therefrom, comprising sole means of synthetic resin, the sole means including a heel portion defining a recess of V-shaped cross section, the recess comprising a rectilinear center recess portion extending in said direction for engaging the one web arm and thereby holding the heel portion on the ski against lateral displacement as well as two diverging rectilinear recess portions extending from an end of the center recess portion for engaging the two diverging web arms, the diverging recess portions enclosing an angle between 90.degree. and 270.degree., beveled transition zones extending between the underside of the sole and the V-shaped recess, and upwardly projecting lateral edges arranged only forward of the heel portion. ### Claim 9 (depends on 8) The ski shoe of claim 8, wherein the angle between the diverging recess portions does not exceed 120.degree.. ### Claim 10 A ski shoe for use with a cross-country ski having a web project from the ski surface and extending in the longitudinal direction of the ski, comprising sole means of synthetic resin extending in an upwardly curvilinear plane, the sole means including a heel portion defining a recess of V-shaped cross section extending in said direction for engaging the web and thereby holding the heel portion on the ski against lateral displacement, and upwardly projecting lateral edges arranged forwardly of the heel portion. ### Claim 11 (depends on 10) The ski shoe of claim 10, wherein the plane of the sole means is upwardly curvilinear in a transverse direction. ### Claim 12 A ski shoe for use with a cross-country ski having a web projecting from the ski surface and extending in the longitudinal direction of the ski, comprising a sole means of synthetic resin comprising an outer sole and an inner sole of a rigid but thin sheet material bonded to the outer sole in transverse strips, the sole means including a heel portion defining a recess of V-shaped cross section extending in said direction for engaging the web and thereby holding the heel portion on the ski against lateral displacement, and upwardly projecting lateral edges forwardly of the heel portion. ### Claim 13 (depends on 12) The ski shoe of claim 12, wherein the sheet material is aluminum, the aluminum sheet material having a gauge of about 0.2 to 0.5 mm. ### Claim 14 (depends on 12, 13) The ski shoe of claim 12 or 13, wherein the sole means has a portion adapted to be in registry with an underlying ski and extending between the two lateral edges of the ski, the transverse strips of the rigid but thin sheet material tapering inwardly in this portion from the lateral ski edges. ### Claim 15 (depends on 14) The ski shoe of claim 14, wherein the transverse strips are separated by transverse slits extending from one lateral edge of the sole means to rounded loops adjacent the opposite lateral edge of the sole means, a narrow rim of the sheet material between the rounded loops and the opposite lateral edge interconnecting the strips thereat. ### Claim 16 A ski shoe for use with a cross-country ski, comprisng an integral sole means of synthetic resin, the sole means including an inner sole insert constituted by thin strips of rigid material extending transversely to the sole means and imparting stiffness to the sole means in a transverse direction, the sole means having lateral edges and a portion extending therebetween and adapted to be in registry with an underlying ski having lateral edges extending in the direction of the lateral edges of the sole means, the sole means portion being defined between two lines overlying the lateral ski edges, the strips tapering inwardly from said lines towards the lateral edges of the sole means, on the one hand, and towards the center of the sole means portion, on the other hand, and the strips having a maximum width along said lines. ### Claim 17 (depends on 16) The ski shoe of claim 16, further comprising narrow webs interconnecting the strips. ### Claim 18 A ski shoe for use with a cross-country ski having a binding web with a plurality of arms extending at an angle to each other, comprising an integral sole means of synthetic resin, the sole means including a heel portion defining a recess with a like plurality of arms, the arms of the binding web and of the recess having complementary V-shaped cross sections for engagement with each other, and the sole means further including an inner sole insert imparting stiffness to the sole means in a transverse direction. ### Claim 19 (depends on 18) The ski shoe of claim 18, wherein the arms of the recess extend to respective ones of the heel portion edges. ### Claim 20 (depends on 18) The ski shoe of claim 18, wherein the height of the arms of the binding web exceeds the depth of the arms of the recess.