Patent US4162791A successfully refreshed from Google Patents.
US4162791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tennis racquet having radially arrayed strings
Assignee: Individual
•
Filing: 1977-10-20
•
Granted: 1979-07-31
•
Expires: 1997-10-20
Abstract
Abstract A novel tennis racquet wherein the frame of the racquet is strung with radially arrayed strings, with the inner end of each of such strings passing through and around a comparatively small ring forming the central terminus for the radially-arrayed strings. Although only a single central securing ring may be utilized if desired, in some instances I have found it advantageous to also utilize a second ring of somewhat larger diameter, concentric with the first ring. This larger diameter ring provides a turn-around point for every other radially-arrayed string, and advantageously makes it conveniently possible to maintain an effective spacing of the strings in the outer locations, near where they attach to the frame. This latter construction enables the avoidance of an excessively high number of strings needing to pass through and around the central securing ring.
Inventors
- 👤 Jack C. Seehase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:39
CPC Classifications
A; A63; A63B; A63B51/00; A63B49/00; A63B49/02; A63B49/022; A63B49/028
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
88 words
A racquet comprising a head of generally oval shape, said head being strung with a plurality of tensioned strings extending radially inwardly from a frame forming a closed loop, and a central ring of small size disposed approximately in the center of the string array, with at least some of the radially arrayed strings extending through and around said central ring, said central ring being smaller than the ball to be used with said racquet, and together with said string array forming an effective, substantially planar striking surface.
Claim 2
Dependent Claim
88 words
A racquet comprising a head of generally oval shape, said head being strung with a plurality of tensioned strings extending radially inwardly from a frame forming a closed loop, and a central ring of small size disposed approximately in the center of the string array, with at least some of the radially arrayed strings extending through and around said central ring, said central ring being smaller than the ball to be used with said racquet, and together with said string array forming an effective, substantially planar striking surface.
Claim 3
Dependent Claim
55 words
The racquet as defined in claim 1 wherein a second, larger diameter ring concentric with the first ring is also utilized for securing strings of the racquet, with strings of less length extending between the frame and the larger ring than the the length of the strings extending between the frame and the smaller ring.
Claim 4
Dependent Claim
25 words
The racquet as defined in claim 2 in which the strings attached at their outer locations to the frame, are alternately long and short strings.
Claim 5
Dependent Claim
42 words
The racquet as defined in claim 1 wherein said ring has an internal circumference such that said strings will each have direct contact with the inner periphery of said ring, and thus avoid double string thickness in the vicinity of said ring.
Claim 6
Dependent Claim
104 words
A tennis racquet having a frame of metal of U-shaped cross-section, said frame forming a head of generally oval shape, said head being strung with a plurality of tensioned, radially-disposed strings, with a central ring of small size disposed approximately in the center of the string array, with at least some of the radially arrayed strings extending through and around said central ring, thus to form a substantially planar striking surface, and pin means forming low friction string supporting means, said pin means being disposed in said frame of U-shaped cross section at spaced locations, and forming the outer supports for the radially-disposed strings.
Claim 7
Dependent Claim
104 words
A tennis racquet having a frame of metal of U-shaped cross-section, said frame forming a head of generally oval shape, said head being strung with a plurality of tensioned, radially-disposed strings, with a central ring of small size disposed approximately in the center of the string array, with at least some of the radially arrayed strings extending through and around said central ring, thus to form a substantially planar striking surface, and pin means forming low friction string supporting means, said pin means being disposed in said frame of U-shaped cross section at spaced locations, and forming the outer supports for the radially-disposed strings.
Claim 8
Dependent Claim
26 words
The tennis racquet as defined in claim 5 in which the base portion of said U-shaped member of which the frame is constructed is directed outwardly.
Claim 9
Dependent Claim
26 words
The tennis racquet as defined in claim 5 in which the base portion of said U-shaped member of which the frame is constructed is directed inwardly.
Claim 10
Dependent Claim
73 words
The tennis racquet as defined in claim 5 wherein a second, larger diameter ring concentric with the first ring is also utilized for securing strings of the racquet, with strings of less length extending between the frame and the larger ring, than the length of the strings extending between the frame and the smaller ring, and with the strings at their attachment points on the frame being alternately long strings and short strings.
Claim 11
Dependent Claim
33 words
The tennis racquet as defined in claim 8 in which small loops are disposed at spaced locations about the periphery of said larger diameter ring, to serve as anchor points for short strings.
Claim 12
Dependent Claim
42 words
The racquet as defined in claim 5 wherein said ring has an internal circumference such that said strings will each have direct contact with the inner periphery of said ring, and thus avoid double string thickness in the vicinity of said ring.
Claim 13
Dependent Claim
104 words
A racquet comprising a head of generally oval shape, said head being strung with a plurality of strings extending radially inwardly from a frame forming a closed loop, and a central ring of small size disposed approximately in the center of the head, with at least some of the radially arrayed strings extending under tension through and around said central ring, said ring having an internal circumference such that said strings will each have direct contact with the inner periphery of the ring, and thus avoid double string thickness in the vicinity of the ring, said string array forming a substantially planar striking surface.
Claim 14
Dependent Claim
104 words
A racquet comprising a head of generally oval shape, said head being strung with a plurality of strings extending radially inwardly from a frame forming a closed loop, and a central ring of small size disposed approximately in the center of the head, with at least some of the radially arrayed strings extending under tension through and around said central ring, said ring having an internal circumference such that said strings will each have direct contact with the inner periphery of the ring, and thus avoid double string thickness in the vicinity of the ring, said string array forming a substantially planar striking surface.
References Cited (Backward Citations)
GB191111965A
Cited
GB204113A
Cited
GB237395A
Cited
US1866158A
Cited
US2369145A
Cited
FR981444A
Cited
US3834699A
Cited
US4026553A
Cited
US3992008A
Cited
US4047717A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-07-30 | 1983-01-29 | 1983-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-30 | 1987-01-29 | 1987-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-30 | 1991-01-29 | 1991-07-31 | $7700.00 | Window Closed / Lapsed |