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US4244266A Expired / Lapsed US ⏱️ 0.0 years remaining

Drumhead deadening device

Assignee: Silver Street Inc
•
Filing: 1979-07-09
•
Granted: 1981-01-13
•
Expires: 1999-07-09
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Abstract

Abstract A drumhead deadening device in which a body of porous, pliable material has an adhesive layer on one surface and the adhesive layer is used to attach the body to a drumhead membrane. An opening is disposed in the body to correspond with the preferred attack area of the drum membrane. When the device is secured to the membrane, the material with the opening therein does not substantially interfere with the initial vibrations induced when the drum membrane is struck by the drummer; however, the material does absorb the reflected vibrations which return toward the center of the drum after having been reflected by the rim of the drum, thus substantially minimizing the ringing phenomenon associated with synthetic drumheads. The body may be annular, or of other shapes, and in a variety of different colors.

Inventors

  • 👤 Bruce N. Hardy

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 01:07
CPC Classifications
G; G10; G10D; G10D13/00; G10D13/01; G10D13/02; G10D13/10; G10D13/14

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 56 words
A drumhead structure comprising a drumhead membrane, an outer rim disposed on the periphery of said membrane, a device of porous, pliable material for absorbing some of the vibrations of said membrane, an opening therein to correspond in position to the preferred attack area of said membrane, and an adhesive attaching said device to said membrane.
Claim 2
Dependent Claim 56 words
A drumhead structure comprising a drumhead membrane, an outer rim disposed on the periphery of said membrane, a device of porous, pliable material for absorbing some of the vibrations of said membrane, an opening therein to correspond in position to the preferred attack area of said membrane, and an adhesive attaching said device to said membrane.
Claim 3
Dependent Claim 25 words
A drumhead structure as defined in claim 1 in which said device is in one of the following shapes: rectangular, triangular, circular or star shaped.
Claim 4
Dependent Claim 17 words
A drumhead structure as defined in claim 1 in which said device is made of foam rubber.
Claim 5
Dependent Claim 16 words
A drumhead structure as defined in claim 1 in which said device is made of polyester.
Claim 6
Dependent Claim 17 words
A drumhead structure as defined in claim 1 in which said device is in an annular shape.
Claim 7
Dependent Claim 60 words
A drum with a drumhead deadening device, comprising a drumhead membrane, an outer rim disposed on the periphery of said membrane, a device of porous, pliable material for absorbing some of the vibrations of said membrane, an opening therein to correspond in position to the preferred attack area of said membrane and an adhesive attaching said device to said membrane.
Claim 8
Dependent Claim 60 words
A drum with a drumhead deadening device, comprising a drumhead membrane, an outer rim disposed on the periphery of said membrane, a device of porous, pliable material for absorbing some of the vibrations of said membrane, an opening therein to correspond in position to the preferred attack area of said membrane and an adhesive attaching said device to said membrane.
Claim 9
Dependent Claim 27 words
A drum with a drumhead deadening device as defined in claim 6 in which a layer of said adhesive is disposed on one surface of said device.
Claim 10
Dependent Claim 21 words
A drum with a drumhead deadening device as defined in claim 7 in which said device is made of foam rubber.

References Cited (Backward Citations)

US2495451A Cited
FR944588A Cited
US3026759A Cited
US3250169A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1984-01-13 1984-07-14 1985-01-13 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1988-01-13 1988-07-14 1989-01-13 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1992-01-13 1992-07-14 1993-01-13 $7700.00 Window Closed / Lapsed

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