US4989870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tennis racket
Assignee: Spalding and Evenflo Companies Inc
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Filing: 1990-01-12
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Granted: 1991-02-05
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Expires: 2010-01-12
Abstract
Abstract A tennis racket having a graphite fiber containing frame with an opening at the head end constituting a bow and with a handle pallet at the handle end. The handle pallet is formed of a soft, dense, indexable urethane. The bow is formed with a common cross-sectional configuration enlarged in the direction of the axis of the opening and located around the majority of the opening. The racket also includes a grommet strip formed of a soft, durable, wear resistant polyurethane-polycarbonate blend secured to the radially exterior edge of the bow around the majority of the opening.
Inventors
- 👤 Richard Janes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:10
CPC Classifications
A; A63; A63B; A63B49/00; A63B49/02; A63B49/022; Y; Y10; Y10S; Y10S273/00; Y10S273/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
235 words
A tennis racket comprising a frame with an opening at the head end consisting of a bow and with a handle at the opposite end, the frame being fabricated of a rigid material, the handle including a separate intermediate member on the rigid frame with an exterior cross-sectional configuration having a plurality of flat sections and edges extending along the length thereof and an interior configuration conforming to the frame, the intermediate member being molded of a dense, soft urethane having a durometer at its exterior surface of about between 50 and 80 on the Shore A scale, the intermediate member having a common cross-sectional configuration along the majority of its length but varying in thickness around its circumference, the handle further including a separate soft grip material wrapped around the exterior of the intermediate member, the bow being formed with a common cross-sectional configuration enlarged in the direction of the axis of the opening and located around the majority of the opening and having a radial dimension of about 12 milimeters plus or minus about 10% and an axial dimension of about 20 millimeters plus or minus about 10%; and a grommet strip being molded of a soft, durable, wear resistant polyurethane-polycarbonate blend having a durometer of about 57 on a Shore D scale plus or minus 5 and secured to the radially exterior edge of the bow around the majority of the opening.
Claim 2
Dependent Claim
235 words
A tennis racket comprising a frame with an opening at the head end consisting of a bow and with a handle at the opposite end, the frame being fabricated of a rigid material, the handle including a separate intermediate member on the rigid frame with an exterior cross-sectional configuration having a plurality of flat sections and edges extending along the length thereof and an interior configuration conforming to the frame, the intermediate member being molded of a dense, soft urethane having a durometer at its exterior surface of about between 50 and 80 on the Shore A scale, the intermediate member having a common cross-sectional configuration along the majority of its length but varying in thickness around its circumference, the handle further including a separate soft grip material wrapped around the exterior of the intermediate member, the bow being formed with a common cross-sectional configuration enlarged in the direction of the axis of the opening and located around the majority of the opening and having a radial dimension of about 12 milimeters plus or minus about 10% and an axial dimension of about 20 millimeters plus or minus about 10%; and a grommet strip being molded of a soft, durable, wear resistant polyurethane-polycarbonate blend having a durometer of about 57 on a Shore D scale plus or minus 5 and secured to the radially exterior edge of the bow around the majority of the opening.
Claim 3
Dependent Claim
35 words
The tennis racket as set forth in claim 1 wherein the cross-section of the bow over the majority of its extent has an axial to radial ratio of about between 1.50 and 1.83 to 1.
Claim 4
Dependent Claim
32 words
The tennis racket as set forth in claim 1 wherein the cross-section of the bow over the majority of its extent has an axial to radial ratio of about 1.67 to 1.
Claim 5
Dependent Claim
33 words
The tennis racket as set forth in claim 1 wherein the grommet strip is molded of a polyurethane-polycarbonate blend having a durometer of about between 52 and 62 on a Shore D scale.
Claim 6
Dependent Claim
30 words
The tennis racket as set forth in claim 1 wherein the grommet strip is molded of a polyurethane-polycarbonate blend having a durometer of about 57 on a Shore D scale.
Claim 7
Dependent Claim
57 words
The tennis racket as set forth in claim 1 wherein the radial exterior edge of the bow, over the majority of its extent, is formed with a recess for the receipt of a bumper strip and with radial holes extending through the bow for the receipt of hollow, string-receiving barrels formed as part of the bumper strip.
Claim 8
Dependent Claim
28 words
The tennis racket as set forth in claim 1 wherein the grommet strip is enlarged axially across the head end of the bow for constituting a bumper strip.
Claim 9
Dependent Claim
33 words
The tennis racket as set forth in claim 1 wherein the grommet strip includes string-receiving barrels formed as part of the grommet strip for being received in radial holes extending through the bow.
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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) | 1994-02-04 | 1994-08-06 | 1995-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-04 | 1998-08-06 | 1999-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-04 | 2002-08-06 | 2003-02-05 | $7700.00 | Window Closed / Lapsed |