US5071125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Racket
Assignee: Individual
•
Filing: 1991-05-08
•
Granted: 1991-12-10
•
Expires: 2011-05-08
Abstract
Abstract A racket includes a substantially oval-shaped frame, a shaft, and a neck portion interconnecting the frame and the shaft. The shaft has a first portion adjacent to the neck portion and a second portion serving as a handle for the racket. The frame, the neck portion, and the first portion of the shaft are integrally made of a first material. The second portion of the shaft is made of a second material different from the first material. A layer of elastic and adhesive material is provided between respective joint end faces of the first and second portions to interconnect the first and second portions.
Inventors
- 👤 Walter Shen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:14
CPC Classifications
A; A63; A63B; A63B49/00; A63B49/02; A63B49/08; A63B60/00; A63B60/54; A63B49/03; A63B49/035; A63B60/06; A63B60/08; A63B60/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
104 words
A racket comprising a substantially oval-shaped frame, a shaft, and a neck portion interconnecting said frame and said shaft, said shaft having a first portion adjacent to said neck portion and a second portion serving as a handle for said racket; said frame, said neck portion, and said first portion of said shaft being integrally made of a first material; said second portion of said shaft being made of a second material different from said first material; said first and second portions having respective joint end faces; said racket further comprising a layer of elastic and adhesive material provided between said joint end faces.
Claim 2
Dependent Claim
104 words
A racket comprising a substantially oval-shaped frame, a shaft, and a neck portion interconnecting said frame and said shaft, said shaft having a first portion adjacent to said neck portion and a second portion serving as a handle for said racket; said frame, said neck portion, and said first portion of said shaft being integrally made of a first material; said second portion of said shaft being made of a second material different from said first material; said first and second portions having respective joint end faces; said racket further comprising a layer of elastic and adhesive material provided between said joint end faces.
Claim 3
Dependent Claim
21 words
The racket as claimed in claim 1, wherein said first material is selected from the group comprising composite material and aluminum.
Claim 4
Dependent Claim
24 words
The racket as claimed in claim 2, wherein said composite material contains reinforcing fiber selected from the group comprising graphite fiber and glass fiber.
Claim 5
Dependent Claim
20 words
The racket as claimed in claim 2, wherein said second material is selected from the group comprising rattan and plastic.
Claim 6
Dependent Claim
14 words
The racket as claimed in claim 4, wherein said plastic is a polyurethane elastomer.
Claim 7
Dependent Claim
17 words
The racket as claimed in claim 2, wherein said elastic and adhesive material is a polyurethane adhesive.
Claim 8
Dependent Claim
35 words
The racket as claimed in claim 1, wherein one of said joint end faces has a tongue projection, and the other one of said joint end faces has a socket to receive said tongue projection.
References Cited (Backward Citations)
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Cited
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Cited
US4007929A
Cited
US4052060A
Cited
US4367871A
Cited
US4746119A
Cited
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Cited
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Cited
US4915382A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-09 | 1995-06-10 | 1995-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-09 | 1999-06-10 | 1999-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-09 | 2003-06-10 | 2003-12-10 | $7700.00 | Window Closed / Lapsed |