Patent US4042238A successfully refreshed from Google Patents.
US4042238A
Expired / Lapsed
US
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Racket
Assignee: EP INDUSTRIES Inc
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Filing: 1975-01-27
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Granted: 1977-08-16
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Expires: 1995-01-27
Abstract
Abstract A racket and method of making same structured with a wide throat spanned with a structural member and the racket having a multi-thickness honeycomb core joined together with and encased in reinforced plastic. A plastic strip with a plurality of integral grommets inserted in the head of the racket has a reduced area between grommets.
Inventors
- 👤 Maurice N. Theriault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:19
CPC Classifications
A; A63; A63B; A63B49/00; A63B49/02; A63B49/08; A63B49/022; A63B49/03; A63B49/10; A63B2049/103; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
213 words
A racket with a handle, a throat and an open oval frame having netting therein, the racket comprising: a handle; an oval frame section connecting the handle and the oval frame formed with a pair of arms extending from the handle to merge into opposite sides of the oval frame, said throat having a depth extending at least a third of the distance from the end of the handle to the closest part of the oval frame; a structural section extending across the throat between the two arms; a core integral to all structural members, said core of a metallic honeycomb material with cell openings in the honeycomb extending toward each face of the racket; a structurally reinforced resin encasing the honeycomb core; the encasing resin around the oval frame having a recess to form a U-shaped outer perimeter extending from arm to arm; at least one plastic strip located in the recess and having a plurality of integral grommets extending through the oval frame to an inside periphery of the frame; and an S-shaped area between each grommet having a thin transverse member joined at opposite ends to alternate grommet sections to form a reduced area in the strip between grommets to permit individualized direction of the grommets without setting up stresses.
Claim 2
Dependent Claim
213 words
A racket with a handle, a throat and an open oval frame having netting therein, the racket comprising: a handle; an oval frame section connecting the handle and the oval frame formed with a pair of arms extending from the handle to merge into opposite sides of the oval frame, said throat having a depth extending at least a third of the distance from the end of the handle to the closest part of the oval frame; a structural section extending across the throat between the two arms; a core integral to all structural members, said core of a metallic honeycomb material with cell openings in the honeycomb extending toward each face of the racket; a structurally reinforced resin encasing the honeycomb core; the encasing resin around the oval frame having a recess to form a U-shaped outer perimeter extending from arm to arm; at least one plastic strip located in the recess and having a plurality of integral grommets extending through the oval frame to an inside periphery of the frame; and an S-shaped area between each grommet having a thin transverse member joined at opposite ends to alternate grommet sections to form a reduced area in the strip between grommets to permit individualized direction of the grommets without setting up stresses.
Claim 3
Dependent Claim
30 words
A racket as in claim 1 wherein the structurally reinforced resin encasing the core extends outward around the outside perimeter of the oval frame to form the U-shaped outer perimeter.
Claim 4
Dependent Claim
145 words
A racket with a handle, a throat and an open oval frame having netting stretched therein, the racket comprising: a handle; an oval frame; a throat section connecting the handle and the oval frame formed with a pair of arms extending from the handle to merge into opposite sides of the oval frame, said throat having a depth extending at least a third of the distance from the end of the handle to the closest part of the oval frame; a structural section extending across the throat between the two arms; a core integral to all structural members, said core of a metallic honeycomb material with cell openings in the honeycomb extending toward each face of the racket; a structurally reinforced resin encasing the honeycomb core; and the honeycomb core comprises at least two layers of honeycomb with a layer of structurally reinforced resin therebetween.
Claim 5
Dependent Claim
145 words
A racket with a handle, a throat and an open oval frame having netting stretched therein, the racket comprising: a handle; an oval frame; a throat section connecting the handle and the oval frame formed with a pair of arms extending from the handle to merge into opposite sides of the oval frame, said throat having a depth extending at least a third of the distance from the end of the handle to the closest part of the oval frame; a structural section extending across the throat between the two arms; a core integral to all structural members, said core of a metallic honeycomb material with cell openings in the honeycomb extending toward each face of the racket; a structurally reinforced resin encasing the honeycomb core; and the honeycomb core comprises at least two layers of honeycomb with a layer of structurally reinforced resin therebetween.
Claim 6
Dependent Claim
34 words
A racket as in claim 3 wherein the honeycomb core comprises three layers of honeycomb with a layer of structurally reinforced resin therebetween and the two outermost layers are thicker than the middle layer.
Claim 7
Dependent Claim
107 words
A tennis racket comprising: an ellipsoidal frame having netting stretched therein; a handle; a pair of arms extending from the handle to join on opposite sides of the ellipsoidal frame to form a throat, a structural section extending across the throat between the two arms; an integral metallic three layer honeycomb core throughout the racket structure wherein the layers of honeycomb are bonded together with layers of reinforced plastic and the center layer of honeycomb is thinner than the two outside layers; and an integral cover around the core of reinforced plastic having a recess around the exposed part of the outer perimeter of the ellipsoidal frame.
Claim 8
Dependent Claim
107 words
A tennis racket comprising: an ellipsoidal frame having netting stretched therein; a handle; a pair of arms extending from the handle to join on opposite sides of the ellipsoidal frame to form a throat, a structural section extending across the throat between the two arms; an integral metallic three layer honeycomb core throughout the racket structure wherein the layers of honeycomb are bonded together with layers of reinforced plastic and the center layer of honeycomb is thinner than the two outside layers; and an integral cover around the core of reinforced plastic having a recess around the exposed part of the outer perimeter of the ellipsoidal frame.
Claim 9
Dependent Claim
25 words
A tennis racket as in claim 5 wherein throat depth extends at least one third of the distance from the ellipsoidal frame to handle end.
Claim 10
Dependent Claim
24 words
A tennis racket as in claim 5 wherein the arms extend on essentially straight lines to be tangent with outer periphery of the frame.
Claim 11
Dependent Claim
55 words
A tennis racket as in claim 5 further comprising: plastic strips located around the ellipsoidal frame, each strip having a plurality of integral grommets extending normal to the outer periphery through the frame, and the plastic strip having a thin transverse member joined at opposite ends to alternate grommet sections to provide flexibility between grommets.
Claim 12
Dependent Claim
92 words
In an improved racket having an oval head, a handle and a throat between the handle and the oval head wherein the improvement comprises: a recess forming a U-shape to extend around the exposed part of the outer periphery, a plurality of grommets to extend normal to the outer periphery and through the oval head, said grommets integral to at least one plastic strip seated in the recess, and the plastic strip has an S-shaped area between each grommet of a thin transverse member joined at opposite ends to alternate grommet sections.
Claim 13
Dependent Claim
92 words
In an improved racket having an oval head, a handle and a throat between the handle and the oval head wherein the improvement comprises: a recess forming a U-shape to extend around the exposed part of the outer periphery, a plurality of grommets to extend normal to the outer periphery and through the oval head, said grommets integral to at least one plastic strip seated in the recess, and the plastic strip has an S-shaped area between each grommet of a thin transverse member joined at opposite ends to alternate grommet sections.
Claim 14
Dependent Claim
58 words
An improved racket as in claim 9 wherein the improvement further comprises: a metallic three layer honeycomb core throughout the racket structure wherein the layers of honeycomb are bonded together with layers of reinforced plastic and the center layer of honeycomb is thinner than the two outside layers, and an integral cover of reinforced plastic around the core.
Claim 15
Dependent Claim
20 words
An improved racket as in claim 10 wherein the improvement further comprises an integral structure member extending across the throat.
Claim 16
Dependent Claim
193 words
A racket with a handle, a throat and an oval frame having netting stretched therein, the racket comprising: a handle; an oval frame; a throat section connecting the handle and the oval frame formed with a pair of arms extending from the handle to merge with opposite sides of the oval frame, said throat section extending at least a third of the distance from the end of the handle to the closest part of the oval frame; a structural section extending across the throat between the two arms; a metallic honeycomb core throughout the structure of the racket having at least two thicknesses joined together with a structural reinforced plastic and open cells of the honeycomb extending toward each face of the racket; a structurally reinforced plastic encasing the core and having a recess to form a U-shaped outer perimeter around the frame extending from arm to arm; plastic strips located around the frame having a plurality of grommets extending through the oval frame and normal to the outer periphery of frame, said plastic strips having a thin transverse member joined at opposite ends to alternate grommet sections to provide flexibility between grommets.
Claim 17
Dependent Claim
193 words
A racket with a handle, a throat and an oval frame having netting stretched therein, the racket comprising: a handle; an oval frame; a throat section connecting the handle and the oval frame formed with a pair of arms extending from the handle to merge with opposite sides of the oval frame, said throat section extending at least a third of the distance from the end of the handle to the closest part of the oval frame; a structural section extending across the throat between the two arms; a metallic honeycomb core throughout the structure of the racket having at least two thicknesses joined together with a structural reinforced plastic and open cells of the honeycomb extending toward each face of the racket; a structurally reinforced plastic encasing the core and having a recess to form a U-shaped outer perimeter around the frame extending from arm to arm; plastic strips located around the frame having a plurality of grommets extending through the oval frame and normal to the outer periphery of frame, said plastic strips having a thin transverse member joined at opposite ends to alternate grommet sections to provide flexibility between grommets.
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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) | 1980-08-15 | 1981-02-14 | 1981-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-15 | 1985-02-14 | 1985-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-15 | 1989-02-14 | 1989-08-16 | $7700.00 | Window Closed / Lapsed |