US4108453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Snowmobile flotation ski
Assignee: Individual
•
Filing: 1976-08-24
•
Granted: 1978-08-22
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Expires: 1996-08-24
Abstract
Abstract A snowmobile ski including an elongate plywood body member and a flexible, air-impervious material covering the bottom surface of the body member. The body has a generally upwardly curved forward end and a width substantially greater than conventional snowmobile skis to provide support in soft snow, slush, ice, and the like. The flexible material covering the bottom surface of the body member is attached, and hermetically sealed, to the bottom surface along the outer margins and a longitudinal center line of the body member by a thin metal strap and a series of spaced bolts.
Inventors
- 👤 Clair H. Lavalier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:58
CPC Classifications
B; B62; B62B; B62B17/00; B62B17/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
143 words
A snowmobile ski for use in soft, deep snow, ice, or slush conditions, comprising: an elongate body member having an upper surface, a lower surface, a generally upwardly curved forward end, and a width at least about 8 inches; a sheet-like overlay covering the lower surface of the body member and attached to an outer periphery of the lower surface of the body member, forming at least one air pocket in the interstice between the overlay and the lower surface, the overlay being fabricated from a smooth, thin, flexible, air-impervious material; means for attaching and substantially hermetically sealing the overlay to the outer periphery of the lower surface of the body member, the attachment means holding the overlay snug against said lower surface; and means attached to the upper surface of the body member for releasable attachment of the ski to a snowmobile.
Claim 2
Dependent Claim
143 words
A snowmobile ski for use in soft, deep snow, ice, or slush conditions, comprising: an elongate body member having an upper surface, a lower surface, a generally upwardly curved forward end, and a width at least about 8 inches; a sheet-like overlay covering the lower surface of the body member and attached to an outer periphery of the lower surface of the body member, forming at least one air pocket in the interstice between the overlay and the lower surface, the overlay being fabricated from a smooth, thin, flexible, air-impervious material; means for attaching and substantially hermetically sealing the overlay to the outer periphery of the lower surface of the body member, the attachment means holding the overlay snug against said lower surface; and means attached to the upper surface of the body member for releasable attachment of the ski to a snowmobile.
Claim 3
Dependent Claim
11 words
The ski of claim 1, wherein the body member is plywood.
Claim 4
Dependent Claim
73 words
The snowmobile ski of claim 2 including a tailpiece element attached to the rear end of the body member and having a bottom surface that lies substantially in the plane of the lower surface of the body member to thereby continue and extend the lower surface of the body member rearwardly, the tailpiece member including a generally upwardly curved rearward end and a width that conforms to the width of the body member.
Claim 5
Dependent Claim
45 words
The snowmobile ski of claim 1, wherein the overlay attachment means includes a first, thin metal band attached to the lower surface of the body member adjacent the outer periphery thereof with the overlay captured and held between said lower suface and said first band.
Claim 6
Dependent Claim
53 words
The snowmobile ski of claim 4, wherein the overlay attachment means includes a second thin, metal band attached to the lower surface of the body member, capturing portions of the overlay therebetween, the metal band being positioned generally central and extending in a longitudinal direction of the lower surface of the body member.
Claim 7
Dependent Claim
14 words
The snowmobile ski of claim 1, wherein the overlay is a resin-impregnated fiberglass material.
References Cited (Backward Citations)
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US2470227A
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US3416810A
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US3482849A
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US3720421A
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US3719369A
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US3765498A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-08-21 | 1982-02-20 | 1982-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-21 | 1986-02-20 | 1986-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-21 | 1990-02-20 | 1990-08-22 | $7700.00 | Window Closed / Lapsed |