US4325280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for deadening drumheads
Assignee: SILVER STREET INCORPORATED A CORP OF
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Filing: 1980-04-14
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Granted: 1982-04-20
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Expires: 2000-04-14
Abstract
Abstract A device for deadening drumheads, to reduce the ringing phenomenon associated principally with synthetic membranes, in which a plurality of bodies of porous, pliable material are disposed around the preferred attack area of the drum membrane. Each of the bodies has an adhesive layer on one surface, and the adhesive layer is used to attach the body to a drumhead membrane. When the device is secured to the membrane, the bodies do not interfere substantially with the initial vibrations induced when the drum membrane is struck by the drummer; however, the bodies absorb the reflected vibrations which return toward the center of the drum and cause the ringing phenomenon. The bodies may be circular, square, rectangular, or of other shapes, and may be in a variety of colors.
Inventors
- 👤 Bruce N. Hardy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:37
CPC Classifications
G; G10; G10D; G10D13/00; G10D13/10; G10D13/14; G10D13/01; G10D13/02
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
69 words
A device for deadening drumheads to minimize the ringing phenomenon associated principally with synthetic drum membranes: said devices comprising a plurality of bodies of porous, pliable material for reacting with one another and with the drumhead membrane, said bodies being positioned generally around the preferred attack area of the membrane, and an adhesive layer on each of said bodies for attaching each of said bodies to the drumhead membrane.
Claim 2
Independent Claim
69 words
A device for deadening drumheads to minimize the ringing phenomenon associated principally with synthetic drum membranes: said devices comprising a plurality of bodies of porous, pliable material for reacting with one another and with the drumhead membrane, said bodies being positioned generally around the preferred attack area of the membrane, and an adhesive layer on each of said bodies for attaching each of said bodies to the drumhead membrane.
Claim 3
Dependent Claim
16 words
A device as defined in claim 1 in which said porous, pliable material is foam rubber.
Claim 4
Dependent Claim
15 words
A device as defined in claim 1 in which said porous, pliable material is polyester.
Claim 5
Dependent Claim
16 words
A device as defined in claim 1 in which said bodies are of generally circular shape.
Claim 6
Dependent Claim
16 words
A device as defined in claim 1 in which said bodies are of generally rectangular shape.
Claim 7
Dependent Claim
41 words
A device as defined in claim 1 in which a layer of protective material is disposed on said adhesive, and said protective layer is adapted to be removed from said adhesive when said device is to be attached to said membrane.
Claim 8
Dependent Claim
22 words
A device as defined in claim 1 which said bodies are positioned equidistant from the preferred attack area and from each other.
Claim 9
Dependent Claim
56 words
In a conventional drum structure having a drumhead membrane: a device for deadening drumhead ring from said membrane comprising a plurality of bodies of porous pliable material for reacting with said membrane, said bodies being positioned around the preferred attack area of the membrane, and an adhesive for attaching each of said bodies to said membrane.
Claim 10
Dependent Claim
56 words
In a conventional drum structure having a drumhead membrane: a device for deadening drumhead ring from said membrane comprising a plurality of bodies of porous pliable material for reacting with said membrane, said bodies being positioned around the preferred attack area of the membrane, and an adhesive for attaching each of said bodies to said membrane.
Claim 11
Dependent Claim
24 words
In a drum structure: a device for deadening drumhead ring as defined in claim 8 in which said porous, pliable material is foam rubber.
Claim 12
Dependent Claim
24 words
In a drum structure: a device for deadening drumhead ring as defined in claim 9 in which said bodies are of generally circular shape.
Claim 13
Dependent Claim
23 words
In a drum structure: a device for deadening drumhead ring as defined in claim 8 in which said porous, pliable material is polyester.
Claim 14
Dependent Claim
24 words
In a drum structure: a device for deadening drumhead ring as defined in claim 11 in which said bodies are of generally rectangular shape.
Claim 15
Dependent Claim
48 words
In a drum structure: a device for deadening drumhead ring as defined in claim 8 in which a layer of protective material is disposed on said adhesive, and said protective layer is adapted for removal from said adhesive when said device is to be attached to said membrane.
Claim 16
Dependent Claim
31 words
In a drum structure: a device for deadening drumhead ring as defined in claim 8 in which said bodies are positioned equidistant from the preferred attack area and from each other.
Claim 17
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 plurality of spaced apart bodies of porous, pliable material disposed generally around the preferred attack area of said membrane for reacting with said membrane to reduce drumhead ring, and an adhesive for attaching said bodies to said membrane.
Claim 18
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 plurality of spaced apart bodies of porous, pliable material disposed generally around the preferred attack area of said membrane for reacting with said membrane to reduce drumhead ring, and an adhesive for attaching said bodies to said membrane.
Claim 19
Dependent Claim
21 words
A drum with a drumhead deadening device as defined in claim 15 in which said porous pliable material is foam rubber.
Claim 20
Dependent Claim
55 words
In a device for deadening drumhead ring: a body of porous, pliable material for reacting with a drumhead membrane, said body being adapted to be positioned radially outwardly from and on only one side of the preferred attack area of said membrane, and an adhesive on said body for attaching said body to said membrane.
Claim 21
Dependent Claim
55 words
In a device for deadening drumhead ring: a body of porous, pliable material for reacting with a drumhead membrane, said body being adapted to be positioned radially outwardly from and on only one side of the preferred attack area of said membrane, and an adhesive on said body for attaching said body to said membrane.
Claim 22
Dependent Claim
23 words
In a device for deadening drumhead ring: a body as defined in claim 17 in which said porous, pliable material is foam rubber.
Claim 23
Dependent Claim
22 words
In a device for deadening drumhead ring: a body as defined in claim 17 in which said porous, pliable material is polyester.
References Cited (Backward Citations)
US3951032A
Cited
US4244266A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-04-19 | 1985-10-19 | 1986-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-19 | 1989-10-19 | 1990-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-19 | 1993-10-19 | 1994-04-20 | $7700.00 | Window Closed / Lapsed |