Patent US4679522A successfully refreshed from Google Patents.
US4679522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Float device for small size boat
Assignee: Kawasaki Motors Ltd
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Filing: 1986-06-23
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Granted: 1987-07-14
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Expires: 2006-06-23
Abstract
Abstract A float inserted in a small size boat is formed of a central portion made of hard foamed plastic and an outer layer portion made of soft foamed plastic.
Inventors
- 👤 Hiroshi Nishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:17
CPC Classifications
B; B63; B63B; B63B34/00; B63B34/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
158 words
A small size boat comprising a boat body made of hard material having an inside surface defining a cavity and a float which has been inserted in said cavity, said float having a central portion of buoyant hard foamed plastic of high density which comprises a larger portion of said float and has a shape substantially geometrically similar to, but smaller than, the cavity, and an outer portion of buoyant soft foamed plastic of low density which forms an outer layer around said central portion and comprises a smaller portion of said float, said outer layer being formed such that said central portion and said outer layer, together, have a shape substantially geometrically similar to, but larger than, the cavity when said outer layer is not compressed so that, when said float is confined within the cavity, said soft outer layer is compressed within the cavity and conforms with the inside surface of the body of the boat.
Claim 2
Dependent Claim
158 words
A small size boat comprising a boat body made of hard material having an inside surface defining a cavity and a float which has been inserted in said cavity, said float having a central portion of buoyant hard foamed plastic of high density which comprises a larger portion of said float and has a shape substantially geometrically similar to, but smaller than, the cavity, and an outer portion of buoyant soft foamed plastic of low density which forms an outer layer around said central portion and comprises a smaller portion of said float, said outer layer being formed such that said central portion and said outer layer, together, have a shape substantially geometrically similar to, but larger than, the cavity when said outer layer is not compressed so that, when said float is confined within the cavity, said soft outer layer is compressed within the cavity and conforms with the inside surface of the body of the boat.
Claim 3
Dependent Claim
86 words
A small size boat according to claim 1 wherein said boat body includes hull and deck portions defining said cavity, said hull portions having sections projecting upwardly and said deck portion being flat and extending between said upwardly projecting hull portions, and said soft outer layer and said hard central portion having sections below and supporting said deck portion, the hard central portion deck-supporting section having greater thickness than the soft outer layer deck-supporting section, and the soft outer layer deck-supporting section providing a cushion effect.
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) | 1990-07-13 | 1991-01-12 | 1991-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-13 | 1995-01-12 | 1995-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-13 | 1999-01-12 | 1999-07-14 | $7700.00 | Window Closed / Lapsed |