Famous Patents
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 |
| 5609475 | Compressor with a hypotrochoidal design having a fluid delivery which is not solely dependent on a drive RPM A compressor with a hypotrochoidal design is constructed in such fashion that its delivery can be varied in ways other than by the drive rpm alone. A controlling edge of an inlet opening that determines the beginning of compression has a variable angular ... | 03/11/1997 |
| 4797074 | Governor device Disclosed is a speed controller of the ball cone type having a unique conical head which serves as a face seal valve and further encloses seals and protects the governor against entry of particulate matter.... | 01/10/1989 |
| 4444272 | Overspeed safety device In a pneumatically powered rotating grinding machine there is provided a safety unit (13) comprising a speed governor and an overspeed release mechanism the purpose of which is to ensure a predetermined maximum speed. For safety reasons, the motor speed m... | 04/24/1984 |
| 4443164 | Secondary speed sensor for governed air grinders The present invention comprises a combined speed sensor and control valve for a rotary fluid motor such as a rotary vane air motor. Weights are pivotally attached to the opposite sides of the rotating output shaft of the air motor and are spring biased in... | 04/17/1984 |
| 4307784 | Shut-off apparatus for pneumatic driven tools The improved shut-off apparatus for pneumatically driven tools includes an auxiliary shut-off valve located in the flow passageway. The valve is controlled by a control rod which extends through the air motor into engagement with a latching device. The la... | 12/29/1981 |
| 4278103 | Overspeed control means for pneumatic tools An overspeed control means for pneumatic tools which includes a split ring valve slidably arranged in a circumferential groove formed in a cage member affixed to the rotor shaft of the tool. When the cage member exceeds a predetermined rotational speed, t... | 07/14/1981 |
| 4265265 | Pneumatic tool governor A pneumatic tool governor having a body rotatable with the rotor of the tool, the body being provided with holes for passage of motive fluid to the motor of the tool, and a centrifugally responsive valve element pivotally mounted upon the governor body so... | 05/05/1981 |
