Patent EP0171033A2 successfully refreshed from Google Patents.
EP0171033A2
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EP
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Vibration-damping device particularly for tennis rackets
Assignee: CABER ITALIA SpA
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Filing: 1985-08-01
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Granted: —
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Expires: 2005-08-01
Abstract
Abstract 57 The device comprises a holder (7, 43) for application to the shaft of a tennis racket, particularly either (7) in a front region (1) or (43) in the handle region (3) extending between the handgrip (2) and oval frame (1). The holder carries damping cells (9, 44) formed preferably by cylindrical chambers with their axes perpendicular to the plane of the racket and being part-filled with a heavy liquid or completely filled with two liquids having different densities or with a granulate medium. Vibration generated in the racket result in the heavy liquid or granulate medium being shaken and dissipate energy, thus damping such vibration.
Inventors
- 👤 Giorgio Buzzavo
- 👤 Leo Sartor
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 21:12
CPC Classifications
A; A63; A63B; A63B60/00; A63B60/54; A63B60/02; A63B60/06; A63B60/22; A63B60/28; A63B60/52
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
62 words
A vibration-damping device particularly for tennis rackets, characterized in that it comprises a holder (7,7a;11,36) associable on a tennis racket and matingly shaped to it at a connection location, said holder being formed with at least one damping cell (9,9a,12,31,32,44) filled at least partially with an incoherent heavy medium (19,26,35,51), means (74,22,28,39) being also provided for securing the holder to the racket.
Claim 2
Dependent Claim
62 words
A vibration-damping device particularly for tennis rackets, characterized in that it comprises a holder (7,7a;11,36) associable on a tennis racket and matingly shaped to it at a connection location, said holder being formed with at least one damping cell (9,9a,12,31,32,44) filled at least partially with an incoherent heavy medium (19,26,35,51), means (74,22,28,39) being also provided for securing the holder to the racket.
Claim 3
Dependent Claim
36 words
A device as in claim 1, characterized in that said holder (7,7a,11,36) comprises two complementary parts (13,14;20,21;26,27;37,38) forming together a recess (15,41) shaped to mate with the area of the racket frame at the connection location.
Claim 4
Dependent Claim
38 words
A device as in claim 1, characterized in that said damping cell (9,9a,12,31,32) comprises a chamber (17,23,33,49) formed in the thickness of said holder (7,7a,11,36), closed by a stopper (18,25,34,50) and partly filled with said incoherent heavy medium.
Claim 5
Dependent Claim
58 words
A device as in claim 1, characterized in that said holder (17,23,33), for connection at the elliptical frame region (1) of the racket, presents a substantially arcuated portion (7) to be connected to said frame region and a dampening portion (8,8a) with said at least one damping cell (9,9a) on the convex side of said substantially arcuated portion.
Claim 6
Dependent Claim
89 words
A device as in claim 1, characterized in that said holder (11), for connection at the elliptical frame region (1) of the racket, presents a substantially arcuated portion to be connected to said frame region (1) and a dampening portion with said at least one dampening cell (12) on the concave side of said substantially arcuated portion, said dampening portion having recesses (24) for the passage of the strings (4) and said at least one dampening cell (12) being arranged at the interspaces between said string passage recesses (24).
Claim 7
Dependent Claim
55 words
A device as in claim 1, characterized in that said holder (36), for connection to the racket handle, at the region between the handgrip (2) and elliptical frame (1), has a recess (43) for positioning said at least one damping cell (44), said damping cell being provided with means of attachment to said holder (36).
Claim 8
Independent Claim
98 words
A device as in claims 1 and 6, characterized in that said at least one damping cell (44) comprises a hollow cylindrical body (45) containing the incoherent heavy medium (51) and having an outside diameter equal to the width of the recess (43), said cylindrical body having at one base an outside flange formation (46) with diameter greater than the width of said recess and at the other base an external thread (47) cooperating with a ring nut (48) greater than said recess width, the length of said cylindrical body being greater than the depth of said recess.
Claim 9
Independent Claim
45 words
A device according to any of claims 1-7, characterized in that each damping cell (9,9a,12,31,32,44) has a preferably cylindrical chamber, said chamber having a symmetry axis perpendicular to the plane of the holder (7,7a,11,36) and being preferably closed by a screw cap or snap-on cap.
Claim 10
Dependent Claim
38 words
A device as in claim 1, characterized in that each damping cell is part-filled with either a heavy liquid or metal balls, while the remainder of the chamber is left empty or filled with a low density liquid.
Claim 11
Dependent Claim
16 words
A damping device as in claim 9, characterized in that said heavy liquid is preferably mercury.
References Cited (Backward Citations)
No citation records indexed.
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