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| Number | Title | Issue Date |
| 4120382 | Wide-band vibration damper A vibration damper for damping sound propagating in solids includes vibran damping horn members connected through a damping material to a support point on the surface of the solid in such a manner that a tapering portion of the horn member contacts the s... | 10/17/1978 |
| 4067184 | Noise reducing spindle washers A noise reducing washer for the spindle of a textile machine has a pair of outer hard resilient washers, for example, of nylon, and a soft washer, for example of rubber, sandwiched therebetween. The composite washers are adapted to be fit on the spindles ... | 01/10/1978 |
| 4066058 | Vibration isolation system A vibration isolation system for a cover mountable on a vibratable engine includes a plurality of resilient grommets positioned about a plurality of stripper bolts which are inserted into the cover and through a resilient sealing gasket to threadedly secu... | 01/03/1978 |
| 4060143 | Muffler mounting apparatus in construction machinery A muffler mounting apparatus in a construction vehicle comprising a vehicle body, an engine mounted on the vehicle body, a muffler connected to an exhaust port of the engine to reduce the noise level of exhaust gas, a pair of supporting levers to support ... | 11/29/1977 |
| 4023651 | Damping vibrations in sheet material A method of and flexible vibration damping pad for damping vibrations in sheet material during working or handling of the sheet material, the pad including vibration damping material portions on one face thereof which are fixedly located against permanent... | 05/17/1977 |
| 3990535 | Vibration damping device for levers This vibration damping device is of a character to minimize the shaking or vibrating of levers, particularly gear shift levers on heavy trucks and other heavy machinery, which when operated over rough terrain at high speed, creates a noise that becomes al... | 11/09/1976 |
| 3982600 | Vehicle engine hood A hood for a tractor loader vehicle which is provided with baffles and ducts, for changing the direction of air flow through a heat exchanger in order to reduce the level of sound generated by the fan of the vehicle's cooling system.... | 09/28/1976 |
| 3971447 | Drill rod for percussion drilling Drill rod for percussion drilling comprising a central rod member and a sleeve member disposed therearound for a major portion of its length. An annular space is provided between said rod and sleeve members, said space being partially filled with one or s... | 07/27/1976 |
| 3957132 | Snowmobile muffler An improved muffler for snowmobiles having multiple stages including at least one radial tubular attenuator comprising one or more flat, two-part casings, the parts being peripherally identical and configured to jointly form a plurality of passages, havin... | 05/18/1976 |
| 3937590 | Acoustic duct with peripherally segmented acoustic treatment An acoustic duct such as a jet engine fan duct is lined with numerous peripherally spaced, longitudinally extending strips of sound-absorbing material which are effective to scatter spinning mode acoustic pressure fields to higher order, attenuating modes... | 02/10/1976 |
