US4247104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tennis racquet
Assignee: Harvard Sports Inc
•
Filing: 1979-01-31
•
Granted: 1981-01-27
•
Expires: 1999-01-31
Abstract
Abstract A racket, for use in playing tennis and similar games, includes a frame which defines a head and a handle, with the head having a generally polygonal configuration defined by a first pair of sides that extend from the handle away from each other to the widest portion of the head and a second pair of sides, connected to the first pair at the widest portion of the handle, extending back towards each other. The second pair of sides are longer in length than the first pair of sides and are connected by a fifth side which extends parallel to the widest portion of the head. Strings are strung between the sides of the head to define an impact surface which provides an enlarged "sweet" spot on the racket near the widest portion of the head as compared to conventionally shaped oval tennis rackets.
Inventors
- 👤 Eli D. Goldsmith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:02
CPC Classifications
A; A63; A63B; A63B49/00; A63B49/02; A63B60/00; A63B60/06; A63B60/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
188 words
A racket comprising a frame defining a head and a handle, said head having a generally polygonal configuration including a first pair of sides extending from first ends at said handle away from each other to second ends, a second pair of sides respectively associated with said first sides and connected at first ends to the second ends of their associated first sides and extending towards each other to second ends, said second pair of sides being larger in length than said first sides; and a fifth side connecting the second ends of said second pair of sides to close said head; and string means between said sides for defining an impact surface; the point of juncture of said first and second sides being spaced from each other a predetermined distance to define the widest point of said head and being located closer to said handle than one half the length of the head thereby to define an enlarged "sweet spot" on the racket; said first shorter sides of the head being generally parallel to the second longer sides of the head to which they are not connected.
Claim 2
Dependent Claim
188 words
A racket comprising a frame defining a head and a handle, said head having a generally polygonal configuration including a first pair of sides extending from first ends at said handle away from each other to second ends, a second pair of sides respectively associated with said first sides and connected at first ends to the second ends of their associated first sides and extending towards each other to second ends, said second pair of sides being larger in length than said first sides; and a fifth side connecting the second ends of said second pair of sides to close said head; and string means between said sides for defining an impact surface; the point of juncture of said first and second sides being spaced from each other a predetermined distance to define the widest point of said head and being located closer to said handle than one half the length of the head thereby to define an enlarged "sweet spot" on the racket; said first shorter sides of the head being generally parallel to the second longer sides of the head to which they are not connected.
Claim 3
Dependent Claim
22 words
A racket as defined in claim 1 wherein each connected first and second side define an angle therebetween of more than 90°.
Claim 4
Dependent Claim
13 words
A racket as defined in claim 2 wherein said angle is approximately 120°.
Claim 5
Dependent Claim
22 words
A racket as defined in claim 3 wherein said fifth side and said second sides define angles therebetween of more than 90°.
Claim 6
Dependent Claim
19 words
A racket as defined in claim 4 wherein said angles between said fifth and second sides are approximately 110°.
Claim 7
Dependent Claim
40 words
A racket as defined in claim 5 wherein said head defines a string area of approximately 70 square inches, has a long dimension of approximately 11 inches and a short dimension between said points of juncture of approximately 9 inches.
Claim 8
Dependent Claim
180 words
A racket comprising a frame defining a head and handle, said head having a generally polygonal configuration including a plurality of sides defining the widest portion of the head at a position which is closer to the handle than one half of the length of the head; said sides including a pair of first straight sides extending from said handle and diverging from each other to the widest portion of the head and a pair of second sides extending from said first sides at the widest portion of the head towards each other and a fifth straight side parallel to the widest portion of the head connecting said second sides; said second sides being longer than said first sides; a yoke member secured to said first sides adjacent said handle; and string means strung between said head sides and said yoke for defining an impact area including a sweet spot located adjacent said wider portion of the head; said first sides of the head being generally parallel to the second sides of the head to which they are not connected.
Claim 9
Dependent Claim
180 words
A racket comprising a frame defining a head and handle, said head having a generally polygonal configuration including a plurality of sides defining the widest portion of the head at a position which is closer to the handle than one half of the length of the head; said sides including a pair of first straight sides extending from said handle and diverging from each other to the widest portion of the head and a pair of second sides extending from said first sides at the widest portion of the head towards each other and a fifth straight side parallel to the widest portion of the head connecting said second sides; said second sides being longer than said first sides; a yoke member secured to said first sides adjacent said handle; and string means strung between said head sides and said yoke for defining an impact area including a sweet spot located adjacent said wider portion of the head; said first sides of the head being generally parallel to the second sides of the head to which they are not connected.
Claim 10
Dependent Claim
27 words
A racket as defined in claim 7 wherein said first and second sides define therebetween, at said widest portion of the head an angle of approximately 120°.
Claim 11
Dependent Claim
40 words
A racket as defined in claim 8 wherein said head defines a string area of approximately 70 square inches, has a long dimension of approximately 11 inches and a short dimension between said points of juncture of approximately 9 inches.
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) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |