Patent US4487426A successfully refreshed from Google Patents.
US4487426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ski
Assignee: NISHIZAWA KK
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Filing: 1982-05-17
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Granted: 1984-12-11
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Expires: 2002-05-17
Abstract
Abstract The ski includes a front ski half extending from the front ground line to the middle part, a rear ski half extending from the middle part to the rear ground line, a gliding surface and a boot mounting area. The right and left side contours of the front ski half are formed in plan into outwardly-bulging curves, more preferably into arcuate curves relative to the longitudinal center line of the ski.
Inventors
- 👤 Akitoshi Nishizawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:08
CPC Classifications
A; A63; A63C; A63C5/00; A63C5/04; A63C5/0405
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
187 words
A ski having an overall length of 1790 mm to 2130 mm, comprising: a front ski half extending from a front tip portion to a middle part, said front ski half including a shovel portion and a front ground line defined at the transition between said shovel portion and the remainder of the ski, said front ground line having a width of 66 mm to 67.2 mm, and said middle part having a width of 69 mm to 70.2 mm; a rear ski half extending from the middle part to a tail portion and including a rear ground line defined at the transition between said tail portion and the remainder of the ski; a gliding surface; and a boot-binding part, wherein said front ski half includes right and left side contours formed in plan into outwardly-bulging curves relative to a longitudinal center line of said ski, and wherein the width of said front ski half increases from said front ground line to said middle part; and wherein said ski comprises one of a pair of similar skis adapted to be attached to opposite feet of a skier.
Claim 2
Dependent Claim
187 words
A ski having an overall length of 1790 mm to 2130 mm, comprising: a front ski half extending from a front tip portion to a middle part, said front ski half including a shovel portion and a front ground line defined at the transition between said shovel portion and the remainder of the ski, said front ground line having a width of 66 mm to 67.2 mm, and said middle part having a width of 69 mm to 70.2 mm; a rear ski half extending from the middle part to a tail portion and including a rear ground line defined at the transition between said tail portion and the remainder of the ski; a gliding surface; and a boot-binding part, wherein said front ski half includes right and left side contours formed in plan into outwardly-bulging curves relative to a longitudinal center line of said ski, and wherein the width of said front ski half increases from said front ground line to said middle part; and wherein said ski comprises one of a pair of similar skis adapted to be attached to opposite feet of a skier.
Claim 3
Dependent Claim
14 words
The ski as claimed in claim 1, wherein said outwardly-bulging curves are arcuate curves.
Claim 4
Dependent Claim
45 words
The ski as claimed in claim 2, wherein said gliding surface has a configuration in a side view of said ski that said gliding surface lies at a point corresponding said boot-binding part on a chord joining said front ground line and rear ground line.
Claim 5
Dependent Claim
30 words
The ski as claimed in claim 3, wherein said gliding surface is plane, as seen in the side view of said ski, between said front groundline and rear ground line.
Claim 6
Dependent Claim
40 words
The ski as claimed in claim 3, wherein said gliding surface defines a convex surface, as seen in the side view of said ski, between said front ground line and rear ground line relative to said chord joining both lines.
Claim 7
Dependent Claim
37 words
The ski as claimed in claim 4 or 5, wherein the right and left side contours of said rear ski half are formed in plan into outwardly-bulging curves relative to the longitudinal center line of said ski.
Claim 8
Dependent Claim
37 words
The ski as claimed in claim 4 or 5, wherein the right and left side contours of said rear ski half are formed in plan into straight lines relative to the longitudinal center line of said ski.
Claim 9
Dependent Claim
37 words
The ski as claimed in claim 4 or 5, wherein the right and left side contours of said rear ski half are formed in plan into inwardly-indent curves relative to the longitudinal center line of said ski.
Claim 10
Dependent Claim
40 words
The ski as claimed in claim 2, wherein said gliding surface is upwardly spaced, as seen in a side view of said ski, from a chord joining said front ground line and rear ground line when said ski is unoccupied.
Claim 11
Dependent Claim
34 words
The ski as claimed in claim 9, wherein the right and left side contours of said rear ski half are formed in plan into outwardly-bulging curves relative to the longitudinal centerline of said ski.
Claim 12
Dependent Claim
34 words
The ski as claimed in claim 9, wherein the right and left side contours of said rear ski half are formed in plan into straight lines relative to the longitudinal centerline of said ski.
Claim 13
Dependent Claim
35 words
The ski as claimed in claim 9, wherein the right and left side contours of said rear ski half are formed in plan into inwardly-indent curves relative to the longitudinal center line of said ski.
References Cited (Backward Citations)
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Cited
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Cited
US2510794A
Cited
FR1193933A
Cited
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Cited
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Cited
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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) | 1987-12-11 | 1988-06-11 | 1988-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-11 | 1992-06-11 | 1992-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-11 | 1996-06-11 | 1996-12-11 | $7700.00 | Window Closed / Lapsed |