# US 4,398,359 A · Plastic ski boot > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,398,359 A - Document ID: US4398359A - Status: Granted - Kind: A - Application number: 06/237,436 - Filed: 1981-02-23 - Granted: 1983-08-16 - Earliest claimed: 1981-02-23 - Assignees: Lange International S.A. - Inventors: Edward L. Chalmers, II - Web page: https://patentgrep.com/patent/US4398359A ## CPC - A43B 5/0417: {for soles or associated with soles of ski boots; for ski bindings (A43B5/0411 takes precedence)} - A43B 5/0421: {located underneath the sole} - A63C 9/086: using parts which are fixed on the shoe of the user and are releasable from the ski binding - A43B: CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR - A63C: SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE (water skis B63B32/00, B63B34/00) ## Abstract A plastic ski boot having an attachment member mounted on its lower between the toe and heel, is adapted to be releasably attached to a ski. The toe and heel portions of the boot are shaped to facilitate safe and comfortable walking and standing, and at least part of the sole walking surfaces are covered with a high friction plastic for walking purposes. The forward lean angle of the boot when out of the binding can be lesser than normal to provide comfortable standing and walking, and the ski binding with which the boot is adapted to cooperate adds sufficient forward lean angle for skiing purposes when the boot is in the binding. ## Claims ### Claim 1 A plastic ski boot adapted to be releasably attached to a ski comprising a boot upper, a boot lower including a sole having a walking surface at least at the toe and heel, a laterally engageable attachment member mounted on the boot lower between the sole toe and sole heel, plastic forming at least part of the sole, wherein the sole plastic defines at least a portion of the walking surface and acts to vertically space said attachment member from the walking surface, said attachment member adapted to be releasably secured to a binding on the ski. ### Claim 2 (depends on 1) A plastic ski boot as defined in claim 1, wherein said sole plastic extends below said attachment member to be interposed between said member and the walking surface, and wherein said sole plastic is at least partially formed of a high friction walking material. ### Claim 3 (depends on 2) A ski boot as defined in claim 2, wherein said attachment member has a pair of laterally spaced portions arranged to cooperate with a ski binding for releasably attaching the boot to a ski. ### Claim 4 (depends on 1) A ski boot as defined in claim 1, wherein the boot upper and lower are formed to provide a comfortable standing angle when the boot is out of the ski binding. ### Claim 5 (depends on 4) A ski boot as defined in claim 4, wherein the attachment member is adapted to cooperate with a ski binding to provide a normal forward lean angle for the boot when it is releasably attached to the ski. ### Claim 6 (depends on 1) A ski boot as defined in claim 1, wherein said attachment member has a pair of laterally spaced portions arranged to cooperate with a ski binding for releasably attaching the boot to a ski. ### Claim 7 (depends on 1, 2) A plastic ski boot as defined in claim 1 or 2, in which portions of the sole toe and the sole heel are shaped to facilitate walking. ### Claim 8 (depends on 7) A plastic ski boot as defined in claim 7, wherein said toe portion is curved upwardly and said heel portion is beveled. ### Claim 9 (depends on 8) A plastic ski boot as defined in claim 8, wherein at least one transverse ridge is provided at one or both of the curved and beveled portions. ### Claim 10 A plastic ski boot adapted to be releasably attached to a ski, comprising a boot upper, a boot lower including a sole having a walking surface at least at the toe and heel, a plate embedded in the sole, a laterally engageable attachment member mounted on the plate between the sole toe and sole heel, plastic forming at least part of the sole, wherein the sole plastic defines at least a portion of the walking surface and acts to vertically space said attachment member from the walking surface, said attachment member adapted to be releasably attached to a binding on the ski. ### Claim 11 (depends on 10) A plastic ski boot as defined in claim 10, wherein said sole plastic extends below said attachment member to be interposed between said member and the walking surface, and wherein said sole plastic is at least partially formed of a high friction walking material. ### Claim 12 (depends on 10) A ski boot as defined in claim 10, wherein said attachment member has a pair of laterally spaced portions arranged to cooperate with a ski binding for releasably attaching the boot to a ski. ### Claim 13 (depends on 11) A ski boot as defined in claim 11, wherein said attachment member has a pair of laterally spaced portions arranged to cooperate with a ski binding for releasably attaching the boot to a ski. ### Claim 14 (depends on 10, 13) A plastic ski boot as defined in claim 10 or 13, in which portions of the sole toe and the sole heel are shaped to facilitate walking. ### Claim 15 (depends on 14) A plastic ski boot as defined in claim 14, wherein said toe portion is curved upwardly and said heel portion is beveled. ### Claim 16 (depends on 15) A plastic ski boot as defined in claim 15, wherein at least one transverse ridge is provided at one or both of the curved and beveled portions. ### Claim 17 (depends on 10) A ski boot as defined in claim 10, wherein the boot upper and lower are formed to provide a comfortable standing angle when the boot is out of the ski binding. ### Claim 18 (depends on 17) A ski boot as defined in claim 17, wherein the attachment member is adapted to coperate with a ski binding to provide a normal forward lean angle for the boot when it is releasably attached to the ski.