Did You Know...
...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7261633 | Unitary pivoting spreader apparatus Spreader apparatus for a crop residue chopper of an agricultural harvesting machine or combine, mountable in a simple manner and quickly and precisely pivotable sidewardly, and optionally upwardly and downwardly, in a unitary manner, for adjusting or varying a direc... | 08/28/2007 |
| 7198062 | Fluid control valve A valve is provided for controlling a flow of a fluid between a first environment and a second environment. The valve includes a frame adapted to fit within a perimeter of an aperture in a divider separating the first environment from the second environment. The val... | 04/03/2007 |
| 6273136 | Differential valve, specifically a cabin air discharge valve in an aircraft, and method for regulating cabin pressure Disclosed is a differential valve specifically a cabin air discharge valve for use in the cabin pressure regulating system of an airplane. The valve has two valve stages for closing a valve port including a smaller first stage and a larger second stage. T... | 08/14/2001 |
| 5454757 | Interchangeable gears for damper assemblies A damper assembly gear system for interchangeably carrying either airfoil damper blades or single-ply damper blades. A first embodiment, in which the damper blades rotate in opposition to one another, includes a group of gear bodies, each of which include... | 10/03/1995 |
| 5411438 | Heating, ventilating and air-conditioning systems At an outlet of a heating, ventilating or air conditioning system air passes from the ducting through a plenum chamber, a damper provided with a set of blades which are movable between open and closed positions and a diffuser which directs the air in a de... | 05/02/1995 |
| 5345966 | Powered damper having automatic static duct pressure relief According to the present invention a damper for controlling the flow of conditioned air supplied through a supply duct to a conditioned space is provided. The damper includes a support housing which defines a flow passage which communicates the supply duc... | 09/13/1994 |
| 4570533 | Fluid deflecting assembly A fluid deflecting assembly comprising a passage defining structure having a fluid passage defined therein for the passage of a fluid stream in one direction therethrough and having a fluid inlet and a fluid exit spaced apart from the fluid inlet, and at ... | 02/18/1986 |
| 4412556 | Device for shutting off large pipes The invention relates to a device for shutting off large pipes in which a two-armed first lever (14) is connected through one arm (14a) to the actuating rod (9) while its other arm (14b) acts on a spring (15), while the two-armed second lever (16) is conn... | 11/01/1983 |
| 4192098 | Air damper apparatus particularly for heating, ventilating and air conditioning systems A multiple bladed air damper unit for heating, ventilating and air conditioning systems includes separate and individual end edge seal elements sealing off the end edges to the frame in the closed position. The seal elements are mounted in end-to-end rela... | 03/11/1980 |
| 4164976 | Damper assembly A damper assembly adapted to be affixed to an air-handling unit at an installation site including a plurality of adjacent damper assembly units adapted to be mounted with and for regulating air flow from the air-handling unit, the damper assembly unit hav... | 08/21/1979 |
| 4113230 | Rotating blade fire damper A fire, smoke and air control damper is disclosed wherein one or more hook-shaped hinge portions formed intermediate between the longitudinal edges of each damper blade engage complementally configured hook-shaped hinge elements formed on opposite sides o... | 09/12/1978 |
| 4098289 | Changeover device for controlling the movement of dosing frames A valve chamber which communicates through flue openings with bottom flues has therein a pair of dosing frames, each mounted on a pivot and movable thereby between a closed position against the openings and an open position withdrawn from the openings. Ea... | 07/04/1978 |
| 4043258 | Louver linkage seal A plurality of linkage seals are provided in an air distribution vent having a plurality of movable louvers for directing an air stream. A common linkage connects the louvers together for simultaneous adjustment. The linkage seals prevent foreign matter i... | 08/23/1977 |
