4,392,681

43.40.Tm ROTATING BODY SYMPATHETIC VIBRATION ABSORBER

Erwin Raquet, assignor to Fried, Krupp Huttenwerke AG 12 July 1983 {Class 295/7); filed in Germany 2 June 1979

A tuned vibration absorber for a railroad wheel is made up of plates with damping material sandwiched between them. When the wheel vibrates at resonance, the absorber also undergoes resonant vibration, and the ener- gy loss due to shear distortion of the damping material attenuates the reso- nant motion.--GEW

4,399,974

43.40.Tm ENGINE MOUNT

Hirofumi Takei, assignor to Nissan Motor Company 23 August 1983 (Class 248/605); filed in Japan 7 January 1981

An engine mount consists of elastomeric blocks 42, 44 and elastomeric tubes 58 that may be filled with gas by means of connection 60. For small vibration, isolation is provided by the gas-filled tubes. For larger vibrations,

•.-70(7Oa )

,58 64 -• 70c . .•

elastomeric block 70 is compressed by plates 54, 56 resulting in the deforma- tion of the other two elastomeric blocks, thus isolating the larger vibra- tions.--GEW

4,535,976

43.40.Tm RUBBER VIBRATION ISOLATORS

Takuya Dan and Akio Fujita, assignors to Bridgestone Tire Company 20 August 1985 {Class 267/8 R); filed in Japan 17 June 1981

A rubber vibration isolator contains an upper and a lower liquid-filled chamber R1, R2. The volumes of the chambers change due to deformation of the isolator, thus pumping the liquid through an orifice 17. Other liquid-

4,400,941

43.40.Tm VIBRATION ABSORBER FOR A FREE PISTON STIRLING ENGINE

Jeffrey S. Rauch, assignor to Mechanical Technology, Incorporated 30 August 1983 (Class 60/520}; filed 5 June 1981

"A free piston Stirling engine has a ... vessel containing a displacer piston and a power piston coupled to each other and to the vessel by gas springs. An additional mass is coupled to the vessel by a gas spring which is tuned to the operating frequency of the engine .... The vibration absorber is effective at all engine frequencies because the absorber gas spring follows the engine working gas mean pressure and changes the absorber natural frequency as the engine frequency changes."--GEW

4,406,177

43.40.Tm REMOTE CONTROL ASSEMBLY

(VIBRATION DAMPENING) William G. Bennett and Arthur L. Spease, assignors to Teleflex, In-

corporated 27 September 1983 {Class 74/501P}; originally filed 23 June 1980

A soft elastomeric vibration damping body is part of a flexible remote control assembly. The elastomeric body is arranged to come between the remote control assembly and a bulkhead through which it penetrates.-- GEW

4,416,445

43.40.Tm VISCOUS SPRING DAMPER

L. Dale Coad, assignor to Imperial Clevite, Incorporated 22 November 1983 (Class 267/35); originally filed 13 October 1978

This is a fluid-filled shock absorber in which the fluid is pumped from one chamber to another by means of an orifice to achieve energy dissipation. The body of the damper is an elastomer loaded in shear.--GœW

4,428,569

43.40.Tm ENGINE MOUNTING FOR AUTOMOBILE

Hirofumi Takei, assignor to Nissan Motor Company 31 January 1984 {class 267/140.1}; filed in Japan 22 July 1980

A gas-damped engine mounting consists of an elastomeric bellows in which air is pumped from one chamber to another through an orifice. The orifice is located in an elastically supported inertia member which also con- tains a valve to regulate the flow for large and small vibrations. This ar- rangement allows for more effective control of high-frequency vibrations.-- GEW

filled cavities Rs, Rn in the elastomer body 12 are connected by another orifice (not shown). Pumping of the liquid between cavities Rs, R4 results from lateral deførmatiøns'--GEW

4,531,761

43.40.Tm APPARATUS FOR VIBRATION ISOLATION ATTACHMENT OF SUBFRAME OR AGGREGATE HOLDER

Rolf yon Sivers, assignor to Dr. Ing. h.c.F. Porsche Aktiengesellschaft 30 July 1985 (Class 280/785); filed in'Germany 13 May 1982 A typical elastic bearing reduces the transmission of vibrations

between a frame and a subframe in a motor vehicle. The frame is stiffened in

the area of the bearing to improve its effeetiveness'--GEW

1279 J. Acaust. Sac. Am. 80(4), Oct. 1986; 0001-4966/86/101279-01500.80; ¸ 1986 Acaust. Sac. Am.; Patent Reviews 1279

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