US4194738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frame of a game racket
Assignee: Resonac Corp
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Filing: 1978-06-26
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Granted: 1980-03-25
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Expires: 1998-06-26
Abstract
Abstract The present invention is directed to a hollow frame for a game racket substantially constructed from a first fiber reinforced thermoplastic frame member which continuously provides outside peripheral portions of the tadpole shape of the frame including a head portion, a straight handle portion and a triangular throat portion which connects the head and handle portions, and a second fiber reinforced thermoplastic frame member which integrally provides the inside remaining portions, as viewed in the tadpole plan view, of the head, throat and handle portion, wherein the first and second frame members are joined together so as to form a hollow frame.
Inventors
- 👤 Mitsuhiro Inoue
- 👤 Yo Maeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:37
CPC Classifications
A; A63; A63B; A63B49/00; A63B49/02; A63B49/10; A63B60/00; A63B2049/0212; A63B2209/00; A63B2209/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
261 words
A frame of a game racket including a looped head portion for supporting strings, a handle portion, and a bridge piece which forms one side of a triangular throat portion which connects said head portion and said handle portion comprising: a continuous first frame member extending along a first side of said handle portion around the looped head portion and returning along a second side of said handle portion; a second frame member extending around the inside portion of said looped head portion and being closed by said bridge piece, said bridge piece being solid and formed integrally with said second frame member; two leg members being formed integrally with said second frame member and coextending with said first frame member to form said handle; said second frame member being channel shaped and including a bottom wall and an open end, said open end thereof facing outwardly around said looped head portion; said leg members being channel shaped, and including a bottom wall and an open end with said open end facing outwardly and extending from said looped head portion from adjacent each side of said bridge piece thereby forming said triangular throat portion therebetween, said bottom wall of each of said leg members being joined together into a I-shaped adjacent said triangular throat portion and extending downwardly to form an interior support of said handle portion; said continuous first frame member extending around the outside peripheral portions to close said open end of the channel of said second frame member and said leg members and forming an internal space therebetween.
Claim 2
Dependent Claim
261 words
A frame of a game racket including a looped head portion for supporting strings, a handle portion, and a bridge piece which forms one side of a triangular throat portion which connects said head portion and said handle portion comprising: a continuous first frame member extending along a first side of said handle portion around the looped head portion and returning along a second side of said handle portion; a second frame member extending around the inside portion of said looped head portion and being closed by said bridge piece, said bridge piece being solid and formed integrally with said second frame member; two leg members being formed integrally with said second frame member and coextending with said first frame member to form said handle; said second frame member being channel shaped and including a bottom wall and an open end, said open end thereof facing outwardly around said looped head portion; said leg members being channel shaped, and including a bottom wall and an open end with said open end facing outwardly and extending from said looped head portion from adjacent each side of said bridge piece thereby forming said triangular throat portion therebetween, said bottom wall of each of said leg members being joined together into a I-shaped adjacent said triangular throat portion and extending downwardly to form an interior support of said handle portion; said continuous first frame member extending around the outside peripheral portions to close said open end of the channel of said second frame member and said leg members and forming an internal space therebetween.
Claim 3
Dependent Claim
37 words
The frame of claim 1, wherein said second frame member includes outside peripheral edges being individually formed with narrow shoulder edges which form narrow external grooves along the joining boundaries of said first and second frame members.
Claim 4
Dependent Claim
44 words
The frame of claim 1 or 2, wherein said first frame member is formed with a number of projections which traverse said internal space, said frame being formed with a number of holes which penetrate said frame through said projections for passing strings therethrough.
Claim 5
Dependent Claim
42 words
The frame of claim 1 or 2, wherein said first frame member is formed with a rib which traverses said internal space, said frame being formed with a number of holes which penetrate said frame through said rib for passing strings therethrough.
Claim 6
Dependent Claim
16 words
The frame of claim 1 or 2, wherein said internal space is filled with foamed plastic.
Claim 7
Dependent Claim
13 words
The frame of claim 5 wherein said foamed plastic is hard polyurethane foam.
Claim 8
Dependent Claim
22 words
The frame of claim 1 or 2, wherein said first and second frame members are formed from glass fiber reinforced polycarbonate resin.
Claim 9
Dependent Claim
21 words
The frame of claim 1 or 2, wherein said first and second frame members are formed from glass fiber reinforced Nylon.
Claim 10
Dependent Claim
51 words
The frame of claim 1, wherein said first frame member is a relatively shallow channel in cross section and said second frame member is a relatively deep channel in cross section, said relatively shallow channel and said relatively deep channel facing outwardly around said looped head portion and said leg members.
Claim 11
Dependent Claim
40 words
The frame of claim 9, wherein said first frame member includes shoulder portions disposed on an outer peripheral edge of said relatively shallow channel and said shoulder portions being seated on an outer peripheral edge of said relatively deep channel.
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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) | 1983-03-25 | 1983-09-24 | 1984-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-25 | 1987-09-24 | 1988-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-25 | 1991-09-24 | 1992-03-25 | $7700.00 | Window Closed / Lapsed |