Acoustical barrier with acoustical seal

• US 5,243,153 A
• Filed: 10/23/1991
• Issued: 09/07/1993
• Est. Priority Date: 10/23/1991
• Status: Expired due to Term

• Current Assignee: Cascade Engineering Incorporated
• Original Assignee: Cascade Engineering Incorporated
• Inventors: Holwerda, Matthew J.
• Primary Examiner(s): Gellner, Michael L.
• Assistant Examiner(s): LEE, EDDIE C H
• Application Number:
  US07/780,884
• Time in Patent Office: 685 Days
• Field of Search: 181/208, 248/56, 248/111, 277/212 C, 277/212 F, 285/192, 285/200
• US Class Current: 181/208
• CPC Class Codes: F16F 1/3732 having an annular or the like shape, e.g. grommet-type resilient mountings
• CPC Class Codes: F16L 5/00 Devices for use where pipes, cables or protective tubing pass through walls or partitions passing insulated pipes through walls F16L59/121; arrangements for leading electric cables or lines through walls, floors or ceilings H02G3/22

Abstract

An acoustical barrier, an aperture and a pipe or cable passing therethrough wherein the aperture has a number of radially extending slits which define a plurality of radial sectors which also extend from the aperture. One or more grooves are arranged in the sectors concentrically about the aperture to increase the radial flexibility of the sectors so that the sectors more closely conform with the shape of the pipe or cable passing through the aperture and thereby reduce the spacing between the slits and reduce the noise passing through the seal.

Claims

1. An acoustical barrier formed of a resilient material and having a pipe or cable passing therethrough and a seal in the article for the pipe or cable;

the seal having an aperture and a plurality of radially disposed slits extending from the aperture to define a plurality of sectors which also extend from the aperture;

the improvement in the seal comprising;

at least one groove in the sectors arranged concentrically about the aperture to increase the radial flexibility of the sectors so that the sectors more closely conform with the shape of the pipe or cable passing through the aperture and to reduce the spacing between the slits, thereby reducing the noise passing through the seal;

the at least one groove having a rounded V-shaped when said sectors are undeformed.

2. An acoustical barrier according to claim 1 wherein the groove is formed on a side of the article, panel or barrier and the sectors are bent outwardly of the side so that the width of the groove decreases as the sectors are bent outwardly of the side.

3. An acoustical barrier according to claim 1 wherein the groove is formed on a side of the housing, panel or barrier and the sectors are being inwardly of the side so that the width of the groove increases as the sectors are bent inwardly of the side.

4. An acoustical barrier according to claim 1 wherein there are two grooves concentrically arranged around the aperture on the same side of the barrier.

5. An acoustical barrier according to claim 1 wherein each slit has circular ends.

6. An acoustical barrier according to claim 1 wherein the barrier is an HVAC housing for an automobile and at least one pipe extends through the housing.

7. An acoustical barrier according to claim 1 wherein the barrier is a transmission solenoid cover and a cable extends through the cover.

8. An acoustical barrier according to claim 1 wherein the barrier is a dashboard cover and a cable extends through the cover.

9. An acoustical barrier according to claim 1 wherein the barrier is an engine side acoustical panel and a cable extends through the panel.