US3950807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water ski
Assignee: Individual
•
Filing: 1975-04-04
•
Granted: 1976-04-20
•
Expires: 1995-04-04
Abstract
Abstract A one-piece molded plastic water ski having an elongated body of V-shaped transverse cross-section through the fore and mid sections of the ski, with the angle between the sidewalls increasing progressively toward the aft section to provide a substantially flat bottom at the aft end. The mid section has a footrest with an upper surface approximately level with the upper edges of the body, and with stirrup pieces secured thereto.
Inventors
- 👤 Roderick P. Sharpe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:49
CPC Classifications
B; B63; B63B; B63B32/00; B63B32/30; B63B32/50
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
188 words
A water ski, comprising: an elongated, relatively narrow body having the length and width of a conventional water ski, the width being substantially uniform along the length of the ski, and only slightly wider than a skier's foot, and said body having a fore section, a mid section and an aft section, the fore and mid sections of said body being of V-shaped transverse cross-section; said body being formed by two longitudinal sidewalls that are substantially flat in transverse cross-section and have laterally separated upper edges, and are joined together to form a relatively sharp keel along the bottom of said ski, the forward end portions of said sidewalls being curved upwardly to form a relatively sharp, upturned bow on said ski; and a footrest in the mid section of said ski between said sidewalls and secured to the ski; the angle of said sidewalls being a relatively small angle on the order of 90° to 110° in said fore section, increasing progressively through said mid section, and becoming substantially 180° in said aft section, whereby said ski has a substantially flat bottom surface in said aft section.
Claim 2
Dependent Claim
188 words
A water ski, comprising: an elongated, relatively narrow body having the length and width of a conventional water ski, the width being substantially uniform along the length of the ski, and only slightly wider than a skier's foot, and said body having a fore section, a mid section and an aft section, the fore and mid sections of said body being of V-shaped transverse cross-section; said body being formed by two longitudinal sidewalls that are substantially flat in transverse cross-section and have laterally separated upper edges, and are joined together to form a relatively sharp keel along the bottom of said ski, the forward end portions of said sidewalls being curved upwardly to form a relatively sharp, upturned bow on said ski; and a footrest in the mid section of said ski between said sidewalls and secured to the ski; the angle of said sidewalls being a relatively small angle on the order of 90° to 110° in said fore section, increasing progressively through said mid section, and becoming substantially 180° in said aft section, whereby said ski has a substantially flat bottom surface in said aft section.
Claim 3
Dependent Claim
25 words
A water ski as defined in claim 1 in which said body is a one-piece plastic molding in which said sidewalls are integrally joined together.
Claim 4
Dependent Claim
21 words
A water ski as defined in claim 1 in which said body and said footrest are composed of structural urethane foam.
Claim 5
Dependent Claim
22 words
A water ski as defined in claim 1 in which the outer surfaces of said sidewalls are of slightly concave cross-sectional curvature.
Claim 6
Dependent Claim
38 words
A water ski as defined in claim 1 in which said ski has a longitudinal recess of V-shaped transverse crosssection in its upper side defined by the inner sides of said sidewalls from said footrest to said bow.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-20 | 1979-10-20 | 1980-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-20 | 1983-10-20 | 1984-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-20 | 1987-10-20 | 1988-04-20 | $7700.00 | Window Closed / Lapsed |