US4033582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of stringing rackets
Assignee: Individual
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Filing: 1975-06-16
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Granted: 1977-07-05
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Expires: 1995-06-16
Abstract
Abstract A method of stringing tennis rackets and the resultant racket therefrom in which the string is secured to the racket frame in the form of three isolated sections; a peripheral section, a working main string section and a working cross string section. Each of these sections is formed from a single length of string and is tied off onto itself so that any section can be replaced without disturbing the other two. The peripheral section is made up of three vertical strands at either side of the space within the racket frame, and three horizontal strands at the top and bottom, respectively, of this space. The working main string section is made up of vertical strands occupying the space between the two sides of the peripheral section and the working cross string section is made up of horizontal strands positioned between the horizontal borders of the peripheral section. The area enclosed by the peripheral section generally defines the "sweet spot" of the racket. Because each of the three string sections is tied off onto itself, the racket can be easily repaired by the mere replacement of any section found to be defective. None of the string holes in the racket frame occupied by any of the three string sections is occupied by either of the other two string sections, and this makes it easy to replace any single section without disturbance of the remaining sections.
Inventors
- 👤 Gaylord C. Linden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:25
CPC Classifications
A; A63; A63B; A63B51/00
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
300 words
A method of stringing a tennis racket or the like comprising the steps of: providing a racket frame having a plurality of string holes distributed in a predetermined pattern around its head, a first piece of string of suitable length to form a peripheral section of mesh within the area enclosed by said head, surrounding a central portion of the area, a second length of string of suitable length to form a working main string section consisting of a plurality of main strings passing through said central portion in the longitudinal direction and a third piece of string of suitable length to form a working cross string section consisting of a plurality of cross strings passing through said central portion in the transverse direction; stringing each piece of string separately through appropriate holes in the head of said racket to form the peripheral, working main string and working cross string sections in said head, said sections being adapted to cooperate to form a complete string mesh for the racket; the stringing of the three pieces of string including the step of securing each piece near each end in a way to firmly anchor each string section in position in the racket frame under suitable tension for efficient use of the racket; and said stringing being done in such a way that none of the three pieces of string forming the separate sections passes through any string hole occupied by any of the other pieces of string or is secured to any of said other pieces of string, and each section is completely isolated from the other two sections so that no section contacts any other section except within the interwoven mesh portion of the playing area of the racket and can be replaced without disturbance of said other two sections.
Claim 2
Independent Claim
300 words
A method of stringing a tennis racket or the like comprising the steps of: providing a racket frame having a plurality of string holes distributed in a predetermined pattern around its head, a first piece of string of suitable length to form a peripheral section of mesh within the area enclosed by said head, surrounding a central portion of the area, a second length of string of suitable length to form a working main string section consisting of a plurality of main strings passing through said central portion in the longitudinal direction and a third piece of string of suitable length to form a working cross string section consisting of a plurality of cross strings passing through said central portion in the transverse direction; stringing each piece of string separately through appropriate holes in the head of said racket to form the peripheral, working main string and working cross string sections in said head, said sections being adapted to cooperate to form a complete string mesh for the racket; the stringing of the three pieces of string including the step of securing each piece near each end in a way to firmly anchor each string section in position in the racket frame under suitable tension for efficient use of the racket; and said stringing being done in such a way that none of the three pieces of string forming the separate sections passes through any string hole occupied by any of the other pieces of string or is secured to any of said other pieces of string, and each section is completely isolated from the other two sections so that no section contacts any other section except within the interwoven mesh portion of the playing area of the racket and can be replaced without disturbance of said other two sections.
Claim 3
Dependent Claim
64 words
A method in accordance with claim 1 in which the securing of each of the three pieces of string near each end comprises the tying off of the string near each end to a tightened strand of the string section formed from that piece of string at a point adjacent the inner periphery of said head to form a suitable knot at that point.
Claim 4
Dependent Claim
223 words
A method in accordance with claim 2 in which each of the peripheral and working cross string sections is strung by initially threading a first end of the appropriate piece of string outwardly through a first string hole adjacent a second string hole through which will pass the strand around which that piece of string is to be tied near said first end and then inwardly through said second string hole, then interweaving said first end outwardly and inwardly through a plurality of string holes separate from said first and second string holes, then wedging the string in the farthest removed of said plurality of string holes; stringing the remainder of each of the appropriate pieces of string in their proper patterns in the racket frame head to form a separate one of the aforesaid string sections; tying the second end of said appropriate piece of string off onto an appropriate strand of the separate string sections; wedging said appropriate piece of string in said second string hole; freeing said appropriate piece of string from its wedged confinement in said farthest removed of said plurality of said holes and pulling the freed end back out of said plurality of holes; and tying off said piece of string near said freed end onto said strand adjacent the inner end of said second string hole.
Claim 5
Dependent Claim
50 words
A method in accordance with claim 3 in which each of the pieces of string forming said peripheral and working cross string sections is clamped at said first string hole prior to being wedged in said second string hole and tied off onto the strand passing through the latter hole.
Claim 6
Dependent Claim
53 words
A method in accordance with claim 4 in which said peripheral section is strung in a pattern comprising three spaced main strings at each side of said area enclosed by said head, three spaced cross strings at the top of said area and three spaced cross strings at the bottom of said area.
Claim 7
Dependent Claim
32 words
A method in accordance with claim 5 in which said peripheral section is strung first, said working main string section is strung second, and said working cross string section is strung last.
Claim 8
Dependent Claim
86 words
A method in accordance with claim 6 including the step of placing a section of plastic tubing on each strand of said string sections around which a knot is tied during the stringing of said racket, the section of tubing being placed at the knot position prior to the tying of said knot so that the knot subsequently bears on the tubing, whereby said each strand is cushioned against the constrictive cutting force as a result of the presence of said knot at the tie-off point.
Claim 9
Dependent Claim
224 words
A tennis racket or the like comprising a racket frame with a head, said frame having three separate pieces of string affixed to its head under tension so as to form a peripheral section surrounding a central portion of the area within the head, a working main string section consisting of a plurality of main strings passing through said central portion in the longitudinal direction and a working cross string section consisting of a plurality of cross strings passing through said central portion in the transverse direction, the piece of string comprising each section being secured at each end in such a way as to maintain that section properly tensioned and positioned for use in the racket frame; the aforesaid piece of string passing through a separate set of string holes in the racket frame head from any string holes through which the piece of string of either of the other two sections passes so that no string hole is shared by more than one of said pieces of string, the three above-identified sections having no interconnecting means and no section contacting any other section except within the interwoven mesh portion of the playing area of the racket, whereby each section is completely isolated from the other two sections in such fashion that it can be replaced without disturbance of said other two sections.
Claim 10
Dependent Claim
224 words
A tennis racket or the like comprising a racket frame with a head, said frame having three separate pieces of string affixed to its head under tension so as to form a peripheral section surrounding a central portion of the area within the head, a working main string section consisting of a plurality of main strings passing through said central portion in the longitudinal direction and a working cross string section consisting of a plurality of cross strings passing through said central portion in the transverse direction, the piece of string comprising each section being secured at each end in such a way as to maintain that section properly tensioned and positioned for use in the racket frame; the aforesaid piece of string passing through a separate set of string holes in the racket frame head from any string holes through which the piece of string of either of the other two sections passes so that no string hole is shared by more than one of said pieces of string, the three above-identified sections having no interconnecting means and no section contacting any other section except within the interwoven mesh portion of the playing area of the racket, whereby each section is completely isolated from the other two sections in such fashion that it can be replaced without disturbance of said other two sections.
Claim 11
Dependent Claim
46 words
A tennis racket or the like in accordance with claim 8, in which the piece of string comprising each of said sections has each end tied off onto a strand of the section formed thereby adjacent the inner periphery of the head of said racket frame.
Claim 12
Dependent Claim
61 words
A tennis racket or the like in accordance with claim 9 including a plurality of sections of suitable plastic tubing respectively positioned around the strands of said sections where the ends of said pieces of string are tied off therearound to cushion said strands against constrictive cutting force as a result of the presence of the knots at the tie-off points.
Claim 13
Independent Claim
257 words
A method of stringing a tennis racket or the like comprising the steps of: providing a racket frame having a plurality of string holes distributed in a predetermined pattern around its head, a first piece of string of suitable length to form a peripheral section of mesh within the area enclosed by said head, surrounding a central portion of that area, a second length of string of suitable length to form a working main string section consisting of a plurality of main strings passing through said central portion in the longitudinal direction and a third piece of string of suitable length to form a working cross string section consisting of a plurality of cross strings passing through said central portion in the transverse direction; and stringing each piece of string separately through appropriate holes in the head of said racket to form the peripheral, working main string and working cross string sections of said head, said sections being adapted to cooperate to form a complete string mesh for the racket; the stringing of the three pieces of string including the steps of securing each piece near each end in a way to firmly anchor each string section in position in the racket frame under suitable tension for efficient use of the racket, this being accomplished by tying off each piece of string near each end to a tightened strand of the string section formed from that piece of string at a point adjacent the inner periphery of said head to form a suitable knot at that point.
Claim 14
Independent Claim
257 words
A method of stringing a tennis racket or the like comprising the steps of: providing a racket frame having a plurality of string holes distributed in a predetermined pattern around its head, a first piece of string of suitable length to form a peripheral section of mesh within the area enclosed by said head, surrounding a central portion of that area, a second length of string of suitable length to form a working main string section consisting of a plurality of main strings passing through said central portion in the longitudinal direction and a third piece of string of suitable length to form a working cross string section consisting of a plurality of cross strings passing through said central portion in the transverse direction; and stringing each piece of string separately through appropriate holes in the head of said racket to form the peripheral, working main string and working cross string sections of said head, said sections being adapted to cooperate to form a complete string mesh for the racket; the stringing of the three pieces of string including the steps of securing each piece near each end in a way to firmly anchor each string section in position in the racket frame under suitable tension for efficient use of the racket, this being accomplished by tying off each piece of string near each end to a tightened strand of the string section formed from that piece of string at a point adjacent the inner periphery of said head to form a suitable knot at that point.
Claim 15
Dependent Claim
221 words
A method in accordance with claim 11 in which each of the peripheral and working cross string sections is strung by initially threading a first end of the appropriate piece of string outwardly through a first string hole adjacent a second string hole through which will pass the strand around which that piece of string is to be tied near said first end and then inwardly through said second string hole, then interweaving said first end outwardly and inwardly through a plurality of string holes separate from said first and second string holes, then wedging the string in the farthest removed of said plurality of string holes; stringing the remainder of the appropriate piece of string in the proper pattern in the racket frame head to form a separate one of the aforesaid string sections; tying the second end of said appropriate piece of string off onto an appropriate strand of the separate string section; wedging said appropriate piece of string in said second string hole; freeing said appropriate piece of string from its wedged confinement in said farthest removed of said plurality of string holes and pulling the freed end back out of the plurality of holes; and tying off said piece of string near said freed end onto said strand adjacent the inner end of said second string hole.
Claim 16
Dependent Claim
50 words
A method in accordance with claim 12 in which each of the pieces of string forming said peripheral and working cross string sections is clamped at said first string hole prior to being wedged in said second string hole and tied off onto the strand passing through the latter hole.
Claim 17
Dependent Claim
53 words
A method in accordance with claim 13 in which said peripheral section is strung in a pattern comprising three spaced main strings at each side of said area enclosed by said head, three spaced cross strings at the top of said area and three spaced cross strings at the bottom of said area.
Claim 18
Dependent Claim
32 words
A method in accordance with claim 14 in which said peripheral section is strung first, said working main string section is strung second, and said working cross string section is strung last.
Claim 19
Dependent Claim
86 words
A method in accordance with claim 15 including the step of placing a section of plastic tubing on each strand of said string sections around which a knot is tied during the stringing of said racket, the section of tubing being placed at the knot position prior to the tying of said knot so that the knot subsequently bears on the tubing, whereby said each strand is cushioned against the constrictive cutting force as a result of the presence of said knot at the tie-off point.
Claim 20
Dependent Claim
138 words
A tennis racket or the like comprising a racket frame with a head, said frame having three separate pieces of string affixed to its head under tension so as to form a peripheral section surrounding a central portion of the area within the head, a working main string section consisting of a plurality of main strings passing through said central portion in the longitudinal direction and a working cross string section consisting of a plurality of cross strings passing through said central portion in the transverse direction, the piece of string comprising each section being secured at each end by being tied off onto a strand of the section formed thereby adjacent the inner periphery of the head of said racket frame so as to maintain that section properly tensioned and positioned for use in the racket frame.
Claim 21
Dependent Claim
138 words
A tennis racket or the like comprising a racket frame with a head, said frame having three separate pieces of string affixed to its head under tension so as to form a peripheral section surrounding a central portion of the area within the head, a working main string section consisting of a plurality of main strings passing through said central portion in the longitudinal direction and a working cross string section consisting of a plurality of cross strings passing through said central portion in the transverse direction, the piece of string comprising each section being secured at each end by being tied off onto a strand of the section formed thereby adjacent the inner periphery of the head of said racket frame so as to maintain that section properly tensioned and positioned for use in the racket frame.
Claim 22
Dependent Claim
60 words
A tennis racket or the like in accordance with claim 17 including a plurality of sections of suitable plastic tubing respectively positioned around the strands of said section where the ends of said piece of string are tied off therearound to cushion said strands against constrictive cutting force as a result of the presence of the knots at tie-off points.
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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) | 1980-07-04 | 1981-01-03 | 1981-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-04 | 1985-01-03 | 1985-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-04 | 1989-01-03 | 1989-07-05 | $7700.00 | Window Closed / Lapsed |