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The ice cream cone was invented at the St. Louis Worlds Fair by Ernest Hamwi in 1904. His waffle booth was next to an ice cream vendor who ran short of dishes. Hamwi rolled a waffle to hold ice cream and the cone was born.
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| Number | Title | Issue Date |
| 4916897 | Exhaust gas purifying apparatus built-in to a muffler for a diesel engine An exhaust gas purifying apparatus comprising a first and a second casings having expansion chambers, respectively, a third casing arranged between the first and second casings to form a passage therebetween, an inlet pipe introducing the exhaust gas into... | 04/17/1990 |
| 4913260 | Gas silencing system with controlling sound attenuation A gas silencing system for controlled sound attenuation of the exhaust gas in a motor vehicle comprises a sound attenuation muffler for exhaust gases. The system also includes means providing a bypass passage for gas to flow around at least part of the mu... | 04/03/1990 |
| 4903486 | Performance responsive muffler for internal combustion engines A muffler responsive to exhaust flow rate is provided for an internal combustion engine. The muffler includes a body having a variable restrictor located downstream from an inlet port and upstream from an outlet port of the muffler. The variable restricto... | 02/27/1990 |
| 4901528 | System for suppressing noise due to exhaust gas from motor vehicle In an automotive vehicle installed with a V-6 engine, engine revolution speed and engine load are detected and a selector valve provided in a silencer is normally closed but it is opened when the engine revolution speed exceeds a predetermined engine revo... | 02/20/1990 |
| 4866933 | Exhaust silencer An exhaust silencer for a car includes a housing, a partitioning diaphragm plate, a conduction pipe for conducting therethrough an exhaust gas from the car engine, an exhaust pipe exhausting thereout the exhaust gas to the atmosphere, an exhaust conduit c... | 09/19/1989 |
| 4842096 | Automobile muffler Disclosed is an automobile muffler having a drain pipe communicating with the upperstream, upper half inside sound-deadening area of its outer pipe, thereby allowing the moisture of the air drawn into the sound-deadening space to leave for the surrounding... | 06/27/1989 |
| 4840030 | Tail pipe structure of control type muffler A tail pipe structure of a control type muffler having a first outlet pipe and a second outlet pipe provided with a control valve inserted therein, wherein the first outlet pipe is in communication with the downstream side of the control valve of the seco... | 06/20/1989 |
| 4739837 | Pneumatic impact tool A pneumatic impact tool comprising a casing having an interior space in which is mounted a piston for reciprocations under the action of compressed air for delivering useful blows, and ports of at least two exhaust passages opening into the interior space... | 04/26/1988 |
| 4731992 | Fuel supply device for engines, more particularly of model aircraft The invention relates to a fuel supply device for model aircraft. To produce an excess pressure in the fuel tank in order to force the fuel into the engine, the fuel tank is connected to an excess pressure chamber (4) of an exhaust constructed in the form... | 03/22/1988 |
| 4699244 | Exhaust silencer device for an internal combustion engine The invention relates to an exhaust silencer device for an internal combustion engine, for placement in the exhaust pipe of the engine. The device according to the invention comprises a damper plate disposed in the exhaust pipe and pivotably about a shaft... | 10/13/1987 |
| 4665692 | Engine exhaust control system An exhaust control system for use in an internal combustion engine for controlling the flow of exhaust gases discharged from the engine to the atmosphere. The apparatus determines a first condition representing the engine speed being higher than a predete... | 05/19/1987 |
| 4643272 | Marine muffler for water-cooled internal combustion engines An exhaust gas silencing assembly or unit of the wet-type receives the exhaust gases from a water cooled internal combustion engine used to power a water-going vehicle, such as a speed boat, and the coolant water from the water jacket of the engine. The e... | 02/17/1987 |
| 4576084 | Small arm having a barrel with a transverse bore and a detachable silencer A small arm having a barrel (11) with at least one transverse bore (14) and a detachable silencer (62) including an expansion chamber (58) communicating with the transverse bore, comprising selectively operable closure means (34) arranged in the path of t... | 03/18/1986 |
| 4541506 | Exhaust diffusion apparatus An exhaust diffusion apparatus positionable between noise level control and performance modes defining a restricted diffusion passage and an unrestricted exit port for performance operation which may be closed to effect noise level control operation.... | 09/17/1985 |
| 4402485 | Eccentrically nested tube gas line silencer A device for attenuating noise of fluid in non-axisymmetric turbulent flow which comprises a conduit and a plurality of parallel aligned nested tubes in said conduit. The nested tubes are of varying cross-sectional size and have approximately the same cro... | 09/06/1983 |
| 4079808 | Temperature sensitive device for causing abnormal muffler operation When exhaust gases reach an abnormally high temperature, a bimetal valve opens and the muffler operates abnormally to produce a loud noise.... | 03/21/1978 |
