US3625512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extruded racket having two seamless hollow tubes formed with an interconnecting web
Assignee: Individual
•
Filing: 1968-01-26
•
Granted: 1971-12-07
•
Expires: 1988-01-26
Abstract
Abstract A racket is made of an aluminum extrusion having two seamless hollow tubes formed with a web of thickness that is more than twice the wall thickness of each tube and is drilled at intervals for receiving the racket strings. The cross-sectional dimension of the extruded racket in a direction perpendicular to the stringing plane is greater than the dimension parallel to the stringing plane. The outside portion of the extrusion is formed with upper and lower grooves for receiving a strip of flexible material that functions for improved balance and weight control and protecting the strings from abrasion, dirt and moisture. The flexible strip may function to help balance and control the weight of the racket through its own weight, supplemented, if necessary, by weights that it may carry.
Inventors
- 👤 Peter A Latham
- 👤 Paul E Brefka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:05
CPC Classifications
A; A63; A63B; A63B49/00; A63B49/02; A63B49/14; A63B49/12; A63B60/00; A63B60/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
184 words
A game racket frame for stringing comprising, an aluminum extrusion that is a unitary structure having two seamless hollow tubes formed with an interconnecting web of material thickness that is more than twice the wall thickness of each tube, the cross-sectional dimension of said extrusion perpendicular to the stringing plane being greater than the dimension of the extrusion parallel to the stringing plane, the exterior cross-sectional dimension of each of said tubes being significantly greater in the direction perpendicular to the stringing plane measured from the center of said extrusion to each end in the direction parallel to the stringing plane measured across said interconnecting web from one side of the extrusion to the other, each of said tubes having an internal hollow with a shape substantially corresponding to the exterior shape of the tube with the said wall thickness thus being formed therebetween being substantially constant, the dimensions of said internal hollows perpendicular and parallel to said stringing plane being greater than said tube wall thickness, said extrusion being formed into a racket shape having a curved head frame, throat and handle extension.
Claim 2
Dependent Claim
184 words
A game racket frame for stringing comprising, an aluminum extrusion that is a unitary structure having two seamless hollow tubes formed with an interconnecting web of material thickness that is more than twice the wall thickness of each tube, the cross-sectional dimension of said extrusion perpendicular to the stringing plane being greater than the dimension of the extrusion parallel to the stringing plane, the exterior cross-sectional dimension of each of said tubes being significantly greater in the direction perpendicular to the stringing plane measured from the center of said extrusion to each end in the direction parallel to the stringing plane measured across said interconnecting web from one side of the extrusion to the other, each of said tubes having an internal hollow with a shape substantially corresponding to the exterior shape of the tube with the said wall thickness thus being formed therebetween being substantially constant, the dimensions of said internal hollows perpendicular and parallel to said stringing plane being greater than said tube wall thickness, said extrusion being formed into a racket shape having a curved head frame, throat and handle extension.
Claim 3
Dependent Claim
95 words
A game racket frame for stringing in accordance with claim 1 wherein the separation between the internal hollows of said tubes is greater than the wall thickness of the first of said tubes added to the wall thickness of the second of said tubes, and said interconnecting web is formed with rounded openings along at least a predetermined intermediate portion of its length corresponding to said curved head frame for receiving game racket strings with the separation between adjacent ones of said openings corresponding to the separation between adjacent strings when said frame is strung.
Claim 4
Dependent Claim
53 words
A game racket for stringing in accordance with claim 1 wherein said shape of said hollows is generally rectangular with length and width respectively perpendicular and parallel to said stringing plane and one corner away from the stringing plane having a radius of curvature much greater than that at the other corners thereof.
Claim 5
Dependent Claim
48 words
A game racket extrusion for stringing in accordance with claim 1 wherein said extrusion is formed with lips extending outwardly of the racket shape from portions of each of said tubes nearer to the ends of said extrusion away from said stringing plane than to said stringing plane.
Claim 6
Dependent Claim
23 words
A game racket frame in accordance with claim 1 where the thickness of said web corresponds substantially to the width of said tubes.
Claim 7
Dependent Claim
82 words
A game racket frame in accordance with claim 1 wherein said extrusion is formed with means for receiving a flexible strip, saiD frame being formed for supporting handle means and defining head means for supporting strings, a flexible strip carried by said means for receiving about the perimeter of said head means and coacting with same frame to comprise means for balancing and controlling the weight of said racket and for protecting the racket strings from damage by abrasion, moisture or dirt.
Claim 8
Dependent Claim
38 words
A game racket frame in accordance with claim 6 wherein said extrusion is also formed with grooves along its outer perimeter separated by said interconnecting web comprising said means for receiving, said flexible strip residing in said grooves.
Claim 9
Dependent Claim
22 words
A game racket frame in accordance with claim 6 wherein said flexible strip is formed with means for removably supporting elemental weights.
Claim 10
Dependent Claim
26 words
A game racket frame in accordance with claim 8 and further comprising at least one of said elemental weights carried by said means for removably supporting.
Claim 11
Dependent Claim
66 words
A method of making the game racket frame of claim 1 which method includes the steps of, forming said extrusion, drilling said rounded openings in said web along said predetermined intermediate portion of its length, and forming said extrusion into the shape of a racket having a head portion embracing said predetermined intermediate portion of the web length and a handle portion for supporting handle means.
Claim 12
Dependent Claim
40 words
A method of making a game racket frame in accordance with claim 10 and further including the step of, fastening opposed portions of said extrusion to a yoke along substantially the boundary between said handle portion and said head portion.
Claim 13
Dependent Claim
41 words
A method of making a game racket is accordance with claim 11 and further including the step of forming said extrusion with grooves along its outer perimeter separated by said interconnecting web, and inserting a flexible strip in the latter grooves.
Claim 14
Dependent Claim
52 words
A method of making a game racket in accordance with claim 11 and further including the steps of, forming said extrusion with grooves along its outer perimeter separated by said interconnecting web, inserting supplemental weights in a flexible strip, and inserting said flexible strip carrying said supplemental weights in the latter grooves.
References Cited (Backward Citations)
US1452803A
Cited
GB210485A
Cited
US1937787A
Cited
GB522222A
Cited
US2593714A
Cited
US2552020A
Cited
US3083968A
Cited
US3086777A
Cited
US3330560A
Cited
FR1504630A
Cited
US3540728A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |