EP0104930A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Frame for sports racket
Assignee: Individual
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Filing: 1983-09-27
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Granted: —
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Expires: 2003-09-27
Abstract
Abstract A sports racket frame shaped to extend around a ball-hitting region covered by string network has an outer perimeter region (16,17) forming an anchorage for strings (3), which otherwise clear the frame inward of their anchorage. Support regions (14,15) of the frame extending inward from the outer perimeter region on oppposite sides of the plane of the string network provide structural support for the anchorage region. The support regions are formed to provide clearance from the string network, and the clearance of the support regions has a depth (18) measured from an inner perimeter region of the frame outward toward the anchorage region that, at least in lateral side regions of the frame extending along lateral sides of the string network, is at least 0.64 cm.
Inventors
- 👤 Tsai Chen Soong
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 23:22
CPC Classifications
A; A63; A63B; A63B49/00; A63B49/02; A63B49/022; A63B49/028; A63B2049/0217; A63B49/03; A63B51/00; A63B51/02; A63B51/023; A63B60/00; A63B60/54
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
167 words
A sports racket frame shaped to extend around a ball-hitting region covered by a string network supported by said frame, said frame comprising: a. An outer perimeter region (2,4,16,17) of said frame (1) forming an anchorage for strings (3) of said string network; b. a support region (14,15) of said frame extending inward from said outer perimeter region toward said ball-hitting region; c. said support region having side regions (14, 15) extending on opposite sides of the plane of said string network and providing structural support for said anchorage region; d. said support region being formed to provide clearance from said strings (3) of said string network; e. said clearance of said support region from said strings having a depth measured from an inner perimeter region of said support region outward to said anchorage region; and f. said string clearance depth (18) at least in lateral side regions of said frame (around node 13) extending along lateral sides of said string network, being at least 0.64 cms.
Claim 2
Dependent Claim
167 words
A sports racket frame shaped to extend around a ball-hitting region covered by a string network supported by said frame, said frame comprising: a. An outer perimeter region (2,4,16,17) of said frame (1) forming an anchorage for strings (3) of said string network; b. a support region (14,15) of said frame extending inward from said outer perimeter region toward said ball-hitting region; c. said support region having side regions (14, 15) extending on opposite sides of the plane of said string network and providing structural support for said anchorage region; d. said support region being formed to provide clearance from said strings (3) of said string network; e. said clearance of said support region from said strings having a depth measured from an inner perimeter region of said support region outward to said anchorage region; and f. said string clearance depth (18) at least in lateral side regions of said frame (around node 13) extending along lateral sides of said string network, being at least 0.64 cms.
Claim 3
Dependent Claim
20 words
The frame of claim 1 wherein said inner perimeter region is formed as an open channel having spaced apart edges.
Claim 4
Dependent Claim
28 words
The frame of claim 1 wherein said inner perimeter region has a wall (5) extending between said side regions and formed to provide clearance openings around said strings.
Claim 5
Dependent Claim
21 words
The frame of any one of claims 1 to 3 wherein said side regions have a plurality of openings (12, 13).
Claim 6
Dependent Claim
21 words
The frame of any one of claims 1 to 4 wherein said string clearance depth (18) is at least 1.14 cms.
Claim 7
Dependent Claim
51 words
The frame of any one of claims 1 to 4 wherein the overall width (7) of said frame in the plane of said string network is from 1.52 to 2.16 cms, and the overall height (6) of said frame perpendicular to said string network is from 1.65 to 2.29 cms .
Claim 8
Dependent Claim
45 words
The frame of any one of claims of 1 to 6 wherein said string clearance depth (18) in said lateral side regions of said frame exceeds said string clearance depth in the nose region of the frame (around node 1) by at least 0.32 cms.
Claim 9
Dependent Claim
43 words
The frame of claim ? wherein the overall width (7) of said frame in the plane of said string network is larger in said lateral side regions of said frame than in a nose region of said frame by at least 0.32 cms.
Claim 10
Dependent Claim
43 words
The frame of claim 1 wherein a cross section of said frame in said lateral side region has an inertia-to-area ratio about a z-axis of between 0.71 to 1.23 cm 2 and about a y-axis of between 0.39 to 0.65 cm 2 .
Claim 11
Dependent Claim
42 words
The frame of any one of claims 1 to 9 wherein said clearance of said support region from said strings allows strings to vibrate freely within an angle of at least 5° on either side of said plane of said string network.
References Cited (Backward Citations)
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