Vibration damping structures

• US 3,160,549 A
• Filed: 12/29/1960
• Issued: 12/08/1964
• Est. Priority Date: 12/29/1960
• Status: Expired due to Term

• Current Assignee: Donald B. Caldwell, Edward G. Lavigne, James N. Brown
• Original Assignee: Donald B. Caldwell, Edward G. Lavigne, James N. Brown
• Inventors: Caldwell, Donald B., Brown, James N., Lavigne, Edward G.
• Application Number:
  US04/079,330
• Time in Patent Office: 1,440 Days
• US Class Current: 428/317.3
• CPC Class Codes: B32B 27/00 Layered products comprising a layer of synthetic resin fibrous or filamentary layer made of a synthetic resin B32B5/02; particulate layer made of a synthetic resin B32B5/16; foamed layer made of a synthetic resin B32B5/18
• CPC Class Codes: E04B 1/84 Sound-absorbing elements
• CPC Class Codes: E04B 1/8409 sheet-shaped
• CPC Class Codes: E04B 2001/8461 layered
• CPC Class Codes: F16F 1/37 of foam-like material , i.e. microcellular material, e.g. sponge rubber padded linings for vehicle interiors B60R21/04
• CPC Class Codes: F16F 9/306 of the constrained layer type, i.e. comprising one or more constrained viscoelastic layers
• CPC Class Codes: G10K 11/168 Plural layers of different materials, e.g. sandwiches
• CPC Class Codes: Y10T 428/1462 Polymer derived from material having at least one acrylic or alkacrylic group or the nitrile or amide derivative thereof [e.g., acrylamide, acrylate ester, etc.]
• CPC Class Codes: Y10T 428/249981 Plural void-containing components
• CPC Class Codes: Y10T 428/249983 As outermost component
• CPC Class Codes: Y10T 428/24999 Inorganic
• CPC Class Codes: Y10T 428/2839 with release or antistick coating
• CPC Class Codes: Y10T 428/2848 Three or more layers
• CPC Class Codes: Y10T 428/2891 including addition polymer from alpha-beta unsaturated carboxylic acid [e.g., acrylic acid, methacrylic acid, etc.] Or derivative thereof

Claims

1. IN COMBINATION WITH A VIBRANT RIGID SHEET BASE, A PREOFRMED READY-TO-LAY PRESSURE-SENSITIVE ADHESIVE VIBRATION DAMPING SHEET ADHERED THERETO AND COMPRISES OF A SOFT RUBBERY "LOSSY" VIBRATION-ABSORBING POLYURETHANE FOAM LAYER HAVING A BULK DENSITY FACTOR OF ABOUT 0.05 TO 0.5, THINLY COATED ON ITS FACE SIDE WITH AN AGGRESSIVELY TACKY PRESSURE-SENSITIVE POLYACRYLATE IN INTIMATE BONDING CONTACT WITH SAID BASE, AND A FLEXIBLE BUT PLANAR-RIGID ALUMINUM FOIL BACKING BONDED TO THE BACK SIDE OF THE FOAM LAYER AS A CONSTRAINING LAYER;

SAID DAMPING SHEET BEING ADAPTED TO SUBSTANTIALLY ATTENUATE VIBRATIONS INDUCED IN SAID BASE.