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US3628802A Expired / Lapsed US ⏱️ 0.0 years remaining

Fiber reinforced plastic ski and method of making the same

Assignee: Nippon Gakki Co Ltd
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Filing: 1969-11-17
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Granted: 1971-12-21
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Expires: 1989-11-17
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Abstract

Abstract A fiber-reinforced plastic ski comprising a body and an upper plate joined to form inside cavities, said body being constructed by integrally molding a baseplate of laminated FRP materials, right and left side members of the same material, at least one reinforcing rib of the same materials rising from the baseplate and having the same height as said side members, running edges located on the lower surface of the baseplate at both sides thereof and a running surface member interposed between running edges on the lower surface of the baseplate, and said upper plate consisting of laminated FRP materials and having top edges embedded in its upper surface at both sides thereof.

Inventors

  • 👤 Osamu Hashimoto
  • 👤 Nobuyuki Kawai

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-03 02:04
CPC Classifications
A; A63; A63C; A63C5/00; A63C5/12

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 366 words
A fiber reinforced plastic ski comprised of: an integral, laminated base of fiber-reinforced plastic material, which extends the length of said ski; said base having integral side members extending upward to contact an upper plate; said base also having a lower running surface member, which extends the length of said ski and is laminated beneath said base; said running surface member having a lower surface beneath said ski; a laminated substantially flattened upper plate of fiber reinforced plastic material, which extends the length of said ski and meets said side members; with said base and its said side members, said upper plate defines an interior cavity within said ski; said upper plate having an upper surface above said ski, and having edges along said upper surface; at least one reinforcing rib, integrally formed as part of said base, extending upward from said base and into contact with said upper plate, which is substantially the same height as said side members and is disposed within said interior cavity; along the length of said base running next to both sides of said running surface member, each side of said base is cut out for receiving a respective lower edge member; two lower edge members, each extending the length of said ski, and extending down to be even with said ski running surface, being received within the said respective base cut out therefor; each said lower edge member including a surface which faces said lower surface of said ski; each said lower edge member also defining a lower edge for said ski; each said lower edge member including a portion, displaced away from said ski lower surface, which extends toward the other said lower edge member; retaining means for said lower edge members; said retaining means being laminated into said laminated base for being securely held in position; said lower edge member retaining means including vertically offset pawl elements, which respectively either engage one of said edge members from above or engage it from below by engaging the said displaced portion thereof; said upper plate having a respective upper edge member embedded in its said upper surface along both said upper edges and extending the length of said ski.
Claim 2
Dependent Claim 366 words
A fiber reinforced plastic ski comprised of: an integral, laminated base of fiber-reinforced plastic material, which extends the length of said ski; said base having integral side members extending upward to contact an upper plate; said base also having a lower running surface member, which extends the length of said ski and is laminated beneath said base; said running surface member having a lower surface beneath said ski; a laminated substantially flattened upper plate of fiber reinforced plastic material, which extends the length of said ski and meets said side members; with said base and its said side members, said upper plate defines an interior cavity within said ski; said upper plate having an upper surface above said ski, and having edges along said upper surface; at least one reinforcing rib, integrally formed as part of said base, extending upward from said base and into contact with said upper plate, which is substantially the same height as said side members and is disposed within said interior cavity; along the length of said base running next to both sides of said running surface member, each side of said base is cut out for receiving a respective lower edge member; two lower edge members, each extending the length of said ski, and extending down to be even with said ski running surface, being received within the said respective base cut out therefor; each said lower edge member including a surface which faces said lower surface of said ski; each said lower edge member also defining a lower edge for said ski; each said lower edge member including a portion, displaced away from said ski lower surface, which extends toward the other said lower edge member; retaining means for said lower edge members; said retaining means being laminated into said laminated base for being securely held in position; said lower edge member retaining means including vertically offset pawl elements, which respectively either engage one of said edge members from above or engage it from below by engaging the said displaced portion thereof; said upper plate having a respective upper edge member embedded in its said upper surface along both said upper edges and extending the length of said ski.
Claim 3
Dependent Claim 69 words
A fiber reinforced plastic ski of claim 1, wherein said retaining means comprises at least one plate extending across said ski and being disposed within said base, whereby said retaining means retains both said lower edge members; said retaining means being cut inward from its edges to define the individual said pawl elements, which are upraised or lowered to be positioned, respectively, above or below said lower edge members.
Claim 4
Dependent Claim 164 words
A fiber reinforced plastic ski of claim 1, wherein along the length of said upper plate near its said upper surface, said plate is cut out for receiving said upper edge members; said upper edge members being received within the respective said cut outs therefor; said upper edge members each including a surface which faces said upper surface of said upper plate; each said upper edge member also defining a respective upper edge of said ski; each said upper edge member including a portion displaceD from said upper surface of said upper plate, which displaced portion extends toward the other said upper edge member; retaining means for said upper edge members; said retaining means being laminated into said upper plate for being securely held in position; said upper edge member retaining means also including vertically offset pawl elements, which respectively either engage at least one of said upper edge members from below or engage it from above by engaging the said displaced portion thereof.
Claim 5
Dependent Claim 100 words
A fiber reinforced plastic ski of claim 3, wherein each said retaining means for each of said upper and said lower edge members comprises a respective at least one plate extending across said ski and being respectively disposed within said upper plate and said base, whereby each said retaining means plate retains, respectively, both of said upper edge members and both of said lower edge members; each said retaining means being cut inward from its edges to define the individual said pawl elements, which are upraised or lowered to be positioned, respectively, above or below the respective said edge members.
Claim 6
Dependent Claim 18 words
A fiber-reinforced plastic ski as claimed in claim 1, in which a plurality of reinforcing ribs are provided.
Claim 7
Dependent Claim 27 words
A fiber-reinforced plastic ski as claimed in claim 1, in which said reinforcing rib is in the shape of a zigzag which extends lengthwise along said ski.

References Cited (Backward Citations)

SU188873A1 Cited
CA572337A Cited
CA734828A Cited
AT145213B Cited
US3074732A Cited
US3322435A Cited
FR1453516A Cited
US3503621A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-12-20 1975-06-21 1975-12-21 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-12-20 1979-06-21 1979-12-21 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-12-20 1983-06-21 1983-12-21 $7700.00 Window Closed / Lapsed

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