Patent US3580598A successfully refreshed from Google Patents.
US3580598A
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US
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Toboggan
Assignee: DEPAUW DOUGLAS R
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Filing: 1969-04-21
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Granted: 1971-05-25
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Expires: 1989-04-21
Abstract
Abstract A steerable toboggan having a transversely curved body with longitudinal corrugations and steering ribs along each side. The steering ribs are deeper and narrower than the corrugations, and are curved with wider spacing at the front than at the rear.
Inventors
- 👤 Robert C De Pauw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:11
CPC Classifications
A; A63; A63C; A63C5/00; A63C5/03; B; B62; B62B; B62B15/00; A63C5/04; A63C5/048; A63C5/0485; B63; B63B; B63B34/00; B63B34/50
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
92 words
A steerable toboggan comprising: an elongated body having an upwardly curved front portion and a transversely curved main body portion extending rearwardly therefrom; a pair of longitudinal steering surfaces depending from the main body portion and spaced outwardly from the longitudinal center line thereof; and a longitudinal guiding surface depending from said main body portion between said steering surfaces, the distance which the guiding surface extends from the plane of the main body portion being less than the distance which the steering surfaces extend from the plane of the main body portion.
Claim 2
Dependent Claim
92 words
A steerable toboggan comprising: an elongated body having an upwardly curved front portion and a transversely curved main body portion extending rearwardly therefrom; a pair of longitudinal steering surfaces depending from the main body portion and spaced outwardly from the longitudinal center line thereof; and a longitudinal guiding surface depending from said main body portion between said steering surfaces, the distance which the guiding surface extends from the plane of the main body portion being less than the distance which the steering surfaces extend from the plane of the main body portion.
Claim 3
Dependent Claim
27 words
The toboggan of claim 1 in which said steering surfaces depend from the lateral edges of the main body portion and extend forwardly from the rear thereof.
Claim 4
Dependent Claim
25 words
The toboggan of claim 1 in which said main body portion is curved upwardly toward the rear, in a plane along the longitudinal axis thereof.
Claim 5
Dependent Claim
25 words
The toboggan of claim 1 in which the transverse curvature at the rear of said main body portion is greater than at the front thereof.
Claim 6
Dependent Claim
25 words
The toboggan of claim 4 in which said steering surfaces are longitudinal ribs extending downwardly from the main body portion along the lateral edges thereof.
Claim 7
Dependent Claim
28 words
The toboggan of claim 1 in which said steering surfaces are longitudinal ribs extending along substantially the entire length of the lateral edges of said main body portion.
Claim 8
Dependent Claim
18 words
The toboggan of claim 6 in which said guiding surface is a rib located between the steering surfaces.
Claim 9
Dependent Claim
18 words
The toboggan of claim 6 in which said guiding surface is a channel located between the steering surfaces.
Claim 10
Dependent Claim
24 words
The toboggan of claim 6 in which the guiding surface is provided by longitudinal corrugations wherein said steering ribs are deeper than said corrugations.
Claim 11
Dependent Claim
18 words
The toboggan of claim 9 in which said steering ribs are narrower than the ribs of said corrugations.
Claim 12
Dependent Claim
36 words
The toboggan of claim 6 in which the outer surface of said longitudinal rib is inclined from the vertical, with the inclination being greater at the rear of said body portion than at the front thereof.
Claim 13
Dependent Claim
30 words
The toboggan of claim 11 in which the inclination of the outer surface of the rib is greater at the center of the body portion than at either end thereof.
Claim 14
Dependent Claim
27 words
The toboggan of claim 6 in which the steering ribs are spaced apart a greater distance at the front of the body portion than at the rear.
Claim 15
Dependent Claim
22 words
The toboggan of claim 13 in which the ribs are closest together at a point between the ends of the body portion.
Claim 16
Dependent Claim
11 words
The toboggan of claim 14 in which the ribs are curved.
Claim 17
Dependent Claim
77 words
An elongated body with an upwardly curved front portion and an elongated main body portion extending rearwardly therefrom, the front and main body portions being joined by a section which is substantially flat transversely of the toboggan, the main body portion being transversely curved with the curvature increasing gradually from said flat section to the rear thereof, the main body portion having an under surface with longitudinally extending corrugations therein and an upper surface which is smooth.
Claim 18
Dependent Claim
77 words
An elongated body with an upwardly curved front portion and an elongated main body portion extending rearwardly therefrom, the front and main body portions being joined by a section which is substantially flat transversely of the toboggan, the main body portion being transversely curved with the curvature increasing gradually from said flat section to the rear thereof, the main body portion having an under surface with longitudinally extending corrugations therein and an upper surface which is smooth.
Claim 19
Dependent Claim
28 words
The toboggan of claim 16 in which said corrugated under surface is transversely curved and concave upwardly, and said smooth upper surface has a corresponding upwardly concave curvature.
Claim 20
Dependent Claim
21 words
The toboggan of claim 16 in which the under and uppeR surfaces are spaced apart panels sealed to define a space.
Claim 21
Dependent Claim
15 words
The toboggan of claim 18 in which said spaced panels have peripheral surfaces bonded together.
Claim 22
Dependent Claim
25 words
The toboggan of claim 19 in which the longitudinal corrugations of the under surface panel have longitudinal groove portions bonded to the upper surface panel.
Claim 23
Dependent Claim
13 words
The toboggan of claim 18 with a foamed plastic filler in said space.
Claim 24
Dependent Claim
13 words
The toboggan of claim 18 in which said space is filled with air.
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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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |