Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7424855 | Slide arrangement A slide arrangement for blocking or closing off a channel disposed between a coal pulverizer and coal dust burners, and conveying a gas having a high proportion of coal dust. The slide arrangement includes a housing disposed in the channel wall and a shroud or steel... | 09/16/2008 |
| 7331298 | Coke oven rotary wedge door latch An oven door latch system for a coke oven door positionable within an oven door opening and method of sealing a coke oven. The door latch system includes a rotary member rotatively attachable to the oven door. The rotary member has a wedge-shaped, arcuate engagement... | 02/19/2008 |
| 6735906 | Warp resistant access door assembly for a high temperature combustion chamber A warp resistant fuel feed door assembly for use in injecting supplemental fuel into a high temperature combustion chamber such as a rotating cement kiln without substantial loss of heat or combustion gases. The apparatus, which is positioned on the exterior side of... | 05/18/2004 |
| 6302684 | Apparatus for opening/closing a process chamber door of ovens used for manufacturing semiconductor devices An apparatus for opening/closing a process chamber door of an oven for manufacturing a semiconductor device includes a boss formed at one side of an opening of the process chamber, a shaft which passes freely through the center of the boss, bearings attac... | 10/16/2001 |
| 6125773 | Cable system for operating furnace doors A cable system for raising and lowering a door of an industrial furnace utilizes a pair of vertically extending cables having lower ends connected to the door and upper ends connected to shaft-carried sheaves that are rotated concurrently to cause upper p... | 10/03/2000 |
| 5727479 | Furnace door closure system A guillotine-style door closure system for a furnace comprises a furnace opening with a door frame on a vertical side of the furnace; a furnace door adapted to mate with the frame; a left closing chain mounted, at one end, to the vertical side of the furn... | 03/17/1998 |
| 5263425 | Waste processing system door assembly A door assembly for an air lock of a waste processing system comprising a vertical sliding door member having a perimeter entirely supported when the sliding door member is in a closed position and is sealed by a selectively inflatable gasket assembly loc... | 11/23/1993 |
| 5221019 | Remotely operable vessel cover positioner A remotely operable vessel cover assembly used with a vessel. The cover assembly has a mounting rim secured to the vessel surrounding a circular opening and a circular cover to fit against the mounting rim. A force ring having a plurality of openings is a... | 06/22/1993 |
| 5029533 | Pressure relief mechanism A safety door for a furnace or like apparatus is operable to open under the force of a hydraulic cylinder when the pressure under the furnace exceeds a predetermined upper limit corresponding to an abnormally high pressure caused by an explosion within th... | 07/09/1991 |
| 4512330 | Fireplace screen A fireplace screen arrangement is disclosed which includes a frame upon which a pair of mesh screen doors are pivotally mounted for movement between closed and open positions with respect to the fireplace. A damper assembly is provided for regulating the ... | 04/23/1985 |
| 4503784 | Door closure assembly for incinerators, furnaces, and ovens A closure arrangement for an incinerator or cremator in which the door and the opening in the incinerator are complementary wedge-shapes is described. The door can be automatically lowered by a hydraulic actuator to close the opening by a wedging action i... | 03/12/1985 |
| 4463504 | Grain drier and method of drying grain A grain drier system is disclosed which includes means for collecting heated air which has passed through grain and conducting it to the inlet of the burners which supply the heated gas to dry the grain. The collected air is introduced into the inlet of t... | 08/07/1984 |
| 4320739 | Combustion type heater A jacketed wood burning stove of the type having an inner firebox door and an outer jacket door in front of the firebox door and wherein a flash inhibitor is provided consisting of a relatively small auxiliary firebox door which is manually biased open bu... | 03/23/1982 |
| 4229162 | Closure apparatus for a slab furnace and method of heating slabs therein Apparatus and method for closing bottom-entry slab furnaces in which a door is pivotably connected to the slab elevator by a horizontally arranged hinge. The door is provided with a cam follower that cooperates with a cam apparatus to controllably swing t... | 10/21/1980 |
| 4115051 | Radiation reflecting door for process furnace A slot furnace has a radiation resistant door which can easily be opened and closed as necessary during operation. The door is mounted on a pivot so that an end thereof covered with heat resistant insulation can be pivoted to open and close the slot when ... | 09/19/1978 |
