Patent US4325281A successfully refreshed from Google Patents.
US4325281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drumhead ring reducer
Assignee: SILVER STREET INCORPORATED A CORP OF
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Filing: 1980-07-02
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Granted: 1982-04-20
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Expires: 2000-07-02
Abstract
Abstract A drumhead ring reducer for minimizing objectionable drumhead ring, in which a body of porous pliable material, such as polyester foam, is disposed within the drum shell and reacts with the drum membrane. An adhesive layer is disposed on the body for attaching the body to the drum shell, and a protective layer covers the adhesive during packaging and distribution. The body may be of a single segment or of a plurality of segments, each in contact with the membrane and disposed adjacent each other around the inner surface of the drum shell. The bodies will remain attached to the shell and operate effectively with a replacement membrane if the original membrane is removed.
Inventors
- 👤 Bruce N. Hardy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:08
CPC Classifications
G; G10; G10D; G10D13/00; G10D13/01; G10D13/02; G10D13/10; G10D13/14
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
71 words
In a musical drum having a drum shell and a drumhead membrane: a drumhead ring reducer comprising an annular body of porous pliable material disposed in contact with the inner side of the membrane for reacting with the membrane without substantially muffling the percussive drum sounds to reduce the ringing phenomenon, and a layer of adhesive on said body for attaching said body to the inner surface of the drum shell.
Claim 2
Dependent Claim
71 words
In a musical drum having a drum shell and a drumhead membrane: a drumhead ring reducer comprising an annular body of porous pliable material disposed in contact with the inner side of the membrane for reacting with the membrane without substantially muffling the percussive drum sounds to reduce the ringing phenomenon, and a layer of adhesive on said body for attaching said body to the inner surface of the drum shell.
Claim 3
Dependent Claim
25 words
In a musical drum: a drumhead ring reducer as defined in claim 1 in which said body is attached near the edge of the shell.
Claim 4
Dependent Claim
22 words
In a musical drum: a drumhead ring reducer as defined in claim 2 in which said porous pliable material is polyester foam.
Claim 5
Dependent Claim
46 words
In a musical drum: a drumhead ring reducer as defined in claim 3 in which a protective layer is disposed on said adhesive layer for packaging and marketing, and said protective layer is adapted to be removed when said body is attached to the drum shell.
Claim 6
Dependent Claim
30 words
In a musical drum: a drumhead ring reducer as defined in claim 1 in which said body includes a plurality of segments disposed adjacent each other around the drum shell.
Claim 7
Dependent Claim
23 words
In a musical drum: a drumhead ring reducer as defined in claim 5 in which each of said segments is of polyester foam.
Claim 8
Dependent Claim
27 words
In a musical drum: a drumhead ring reducer as defined in claim 5 in which each of said segments is attached near the edge of the shell.
Claim 9
Dependent Claim
23 words
In a musical drum: a drumhead ring reducer as defined in claim 7 in which each of said segments is of polyester foam.
Claim 10
Dependent Claim
50 words
In a musical drum: a drumhead ring reducer as defined in claim 8 in which a protective layer is disposed on said adhesive of each of said segments for packaging and marketing, and said protective layers are adapted to be removed when said segments are attached to the drum shell.
Claim 11
Dependent Claim
22 words
In a musical drum: a drumhead ring reducer as defined in claim 1 in which said porous pliable material is polyester foam.
Claim 12
Dependent Claim
79 words
In a musical drum: the combination comprising a drum shell, a drumhead membrane attached to said shell, and a drumhead ring reducer including a body of porous pliable material attached to the shell and having a surface disposed in contact with the inner side of the membrane for reacting with the membrane to reduce drumhead ring without substantially muffling the percussive drum sounds, and an adhesive for attaching said body to said shell in close proximity to said membrane.
Claim 13
Dependent Claim
79 words
In a musical drum: the combination comprising a drum shell, a drumhead membrane attached to said shell, and a drumhead ring reducer including a body of porous pliable material attached to the shell and having a surface disposed in contact with the inner side of the membrane for reacting with the membrane to reduce drumhead ring without substantially muffling the percussive drum sounds, and an adhesive for attaching said body to said shell in close proximity to said membrane.
Claim 14
Dependent Claim
28 words
In a musical drum: the combination as defined in claim 11 in which said body includes a plurality of segments disposed adjacent each other around the drum shell.
Claim 15
Dependent Claim
20 words
In a musical drum: the combination as defined in claim 12 in which said porous pliable material is polyester foam.
Claim 16
Dependent Claim
20 words
In a musical drum: the combination as defined in claim 11 in which said porous pliable material is polyester foam.
References Cited (Backward Citations)
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 |