# US 7,464,788 B2 · Apparatus for transmitting sound in a motor vehicle

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- Number: US 7,464,788 B2
- Document ID: US7464788B2
- Status: Granted
- Kind: B2
- Application number: 11/211,727
- Filed: 2005-08-26
- Published: 2006-03-02
- Granted: 2008-12-16
- Earliest claimed: 2004-08-28
- Assignees: Mann+Hummel GmbH
- Inventors: Matthias Alex; Frank Pfeiffer
- Web page: https://patentgrep.com/patent/US7464788B2

## CPC

- F02M 35/1272: {using absorbing, damping, insulating or reflecting materials, e.g. porous foams, fibres, rubbers, fabrics, coatings or membranes}
- F02M 35/1294: {Amplifying, modulating, tuning or transmitting sound, e.g. directing sound to the passenger cabin; Sound modulation}
- G10K 11/22: for conducting sound through hollow pipes, e.g. speaking tubes
- F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- G10K: SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR

## Abstract

An apparatus for transmitting sound in a motor vehicle having a housing (1) with an inner partition (2), which together define two separate subspaces (3, 4). A transmission valve (6) which separates the two subspaces (3, 4) is provided in a pivot bearing opening (9) in the partition (2) and is mounted to pivot about a pivot axis (5) in the area of the pivot bearing opening (9). The first subspace (3) is connected in a manner capable of transmitting sound to an intake manifold (17) of an internal combustion engine, and the second subspace (4) is connected in a manner capable of transmitting sound to an interior space of the motor vehicle. The gap (11) between an edge (10) of the pivot bearing opening (9) and the transmission valve (6) is sealed in a pressure-tight manner by a membrane (12).

## Claims

### Claim 1

An apparatus for transmitting sound in a motor vehicle, said apparatus comprising a housing with an inner partition which together define two separate subspaces, and a transmission valve disposed in a pivot bearing opening in said partition separating the two subspaces and mounted to pivot about a pivot axis in the area of the pivot bearing opening; wherein one of said subspaces is connected to an intake manifold of an internal combustion engine, the other of said subspaces is connected to an interior space of the motor vehicle in a manner capable of transmitting sound, and a gap between an edge, corresponding to a free end of the respective section of the partition facing inward, of the pivot bearing opening and the transmission valve is sealed on both sides of the transmission valve in a pressure-tight manner by a membrane that is rigid in its plane and secures the transmission valve in at least one of the plane of the membrane and the plane of the partition.

### Claim 2 (depends on 1)

An apparatus according to claim 1, wherein the membrane is connected to the transmission valve in a pressure-tight manner along the pivot axis.

### Claim 3 (depends on 1)

An apparatus according to claim 1, wherein said gap and the membrane which seals the gap are arranged in an annular configuration around the cross section of the transmission valve.

### Claim 4 (depends on 1)

An apparatus according to claim 1, wherein the membrane is secured to an outer frame on the housing.

### Claim 5 (depends on 1)

An apparatus according to claim 1, wherein the membrane is secured to an inner frame on the valve.

### Claim 6 (depends on 1)

An apparatus according to claim 1, wherein the membrane is secured to an outer frame on the housing and to an inner frame on the valve, and a torsionally elastic web extending from the inner frame to the outer frame is provided in the area of the pivot axis.

### Claim 7 (depends on 6)

An apparatus according to claim 6, wherein the inner frame and the outer frame are joined by the web.

### Claim 8 (depends on 7)

An apparatus according to claim 7, wherein the inner frame and the outer frame are constructed in one piece together with the web.

### Claim 9 (depends on 4)

An apparatus according to claim 4, wherein the outer frame is held in a form-fitting manner in a groove at the edge of the pivot bearing opening.