Patent US5425534A successfully refreshed from Google Patents.
US5425534A
Expired / Lapsed
US
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Badminton racket handle structure
Assignee: Individual
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Filing: 1993-09-17
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Granted: 1995-06-20
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Expires: 2013-09-17
Abstract
Abstract The invention herein relates to a badminton racket handle structure, referring specifically to a structure that eliminates the glued wooden handle structure of conventional badminton rackets by utilizing direct injection molding onto the end of the center shaft of the badminton racket that results in a shell structured handle with a greater degree of precision and stability.
Inventors
- 👤 Hon-Chy Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:43
CPC Classifications
A; A63; A63B; A63B49/00; A63B49/02; A63B49/08; A63B60/00; A63B60/06; A63B60/16; A63B2102/00; A63B2102/04; A63B60/08; A63B60/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
173 words
A game racket structure comprising: a) a tubular center shaft having a substantially circular cross-sectional configuration with a first end portion and a second end portion; b) at least one groove defined by the second end portion extending in a chordal direction substantially across the tubular center shaft; c) a handle attached to the second end portion of the tubular center shaft; and comprising: i) a generally conical, hollow end section formed on one end of the handle opposite a butt section; ii) a tubular member extending into the hollow, generally conical end section, the tubular member defining a cylindrical recess so as to tightly grip the second end portion of the tubular center shaft and having at least one protrusion engaging the at least one groove so as to prevent relative axial and rotational movement between the handle and the tubular center shaft; and, iii) at least one elongated rib support extending along and radially from the tubular member so as to connect the tubular member to the conical, hollow end section.
Claim 2
Dependent Claim
173 words
A game racket structure comprising: a) a tubular center shaft having a substantially circular cross-sectional configuration with a first end portion and a second end portion; b) at least one groove defined by the second end portion extending in a chordal direction substantially across the tubular center shaft; c) a handle attached to the second end portion of the tubular center shaft; and comprising: i) a generally conical, hollow end section formed on one end of the handle opposite a butt section; ii) a tubular member extending into the hollow, generally conical end section, the tubular member defining a cylindrical recess so as to tightly grip the second end portion of the tubular center shaft and having at least one protrusion engaging the at least one groove so as to prevent relative axial and rotational movement between the handle and the tubular center shaft; and, iii) at least one elongated rib support extending along and radially from the tubular member so as to connect the tubular member to the conical, hollow end section.
Claim 3
Dependent Claim
35 words
The game racket structure of claim 1 further comprising a pair of grooves defined by the second end portion and a pair of protrusions on the handle located such that one protrusion engages each groove.
Claim 4
Dependent Claim
23 words
The game racket structure of claim 2 wherein the pair of grooves are located at diametrically opposite positions on the tubular center shaft.
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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) | 1998-06-19 | 1998-12-19 | 1999-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-06-19 | 2002-12-19 | 2003-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-06-19 | 2006-12-19 | 2007-06-20 | $7700.00 | Window Closed / Lapsed |