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An aircraft having vertical takeoff and landing capability provided with at least first and second laterally extending paddle wheels rotatable on a central axis perpendicular to the longitudinal axis of the aircraft fuselage and between its nose and tail.
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| Number | Title | Issue Date |
| 8065779 | Automatic door closure for breakout sliding doors and patio doors A sliding door automatic closing device is provided whereby a cylindrical tube is attached to the sliding door and a pulley housing is rotateably mounted to the top of the cylindrical tube. A cable is attached at one end to a cable housing, the housing mounted onto ... | 11/29/2011 |
| 7150130 | Sliding door assembly A door assembly of the type having a frame mounted to a wall. The frame comprises a head portion, opposed vertical jamb portions and a sill portion. Doors are provided in the frame. A door in the frame is displaceable between an open position and a closed position. ... | 12/19/2006 |
| 7025106 | Automatically-closing screen door and closing speed adjuster for the same An automatically-closing screen door is provided that is typically for enclosure with a conventional sliding glass door used for patio entry in residential and/or commercial dwellings. The automatically-closing screen door preferably has a counterweight that is empl... | 04/11/2006 |
| 6968645 | Sliding service window In accordance with one embodiment of the present invention, a sliding, bi-parting, service window may be operated by pressing on a push operator. In response to such push operation, a pair of bi-parting windows may be caused to slide apart sufficiently to provide a ... | 11/29/2005 |
| 6148925 | Method of making a conductive downhole wire line system A method for inserting at least one conductor into an elongated length of metal coiled tubing, includes the steps of placing the coiled tubing in a substantially vertical passageway, inserting the conductor into the tubing, the leading end of the conducto... | 11/21/2000 |
| 6142260 | Apparatus for closing hatch doors of an elevator Disclosed is an apparatus for closing hatch doors of an elevator, which is capable of minimizing a generation of noise during an opening and closing the hatch doors of the elevator. The apparatus for closing the hatch doors of the elevator, according to t... | 11/07/2000 |
| 6065184 | Apparatus for automatic closing of sliding doors Apparatus (20) for automatically closing a sliding door (40), comprising a pneumatically controlled weighted piston (1) within a vertical tube 5' for operative connection to a sliding panel (13) forming part of a sliding door assembly such that sliding th... | 05/23/2000 |
| 5850672 | Apparatus or kit for closing sliding closure Apparatus or kit is provided for use in a sliding closure for the automatic return of the sliding closure to its closed position after being moved to an open position, and includes a corner insert member adapted to fit within an upper corner structure of ... | 12/22/1998 |
| 5579607 | Convenient automatic closing system for doors A housing having a first cross-sectional shape includes an elongate passageway disposed between a sealed bottom end of the housing and a top opening thereof. Liquid is disposed in the elongate passageway. A pulley is mounted substantially above the top op... | 12/03/1996 |
| 5285596 | Door closure apparatus A closure device automatically closes a sliding door and latches the door to prevent children from opening the door once it has been closed.... | 02/15/1994 |
| 4891911 | Sliding door closing device An automatic closing device adapted for attachment to a sliding door having upper and lower horizontal frame members and supported between upper and lower track members is disclosed. The closing device comprises an elongated tubular member containing a co... | 01/09/1990 |
| 4884369 | Sliding door closer An automatic door or window closing device which includes a tube attached to the edge of a moveable door or window. The tube has a weight displaced therein with a cable attached at the top which passes out of the top of the tube across a pulley and is con... | 12/05/1989 |
| 4828236 | Damper device for a door having dual-direction operating biasing spring means A damper device comprises damping structure and a spring device and is advantageously used for a door swingably supported by a shaft to be opened and shut between a totally shut position and a totally opened position and opened under the influence of its ... | 05/09/1989 |
| 4665584 | Buoyant valve member closing device for doors A door closing device has an upright tube closed at the bottom and containing a damping liquid, a sinker weight being arranged in the tube and connected to a flexible cord which extends out of the top of the tube for connection to a door so that a door is... | 05/19/1987 |
| 4649598 | Energy saver sliding door closer including a valved weight An energy saver door closer for use with a sliding door. A long cylindrical housing is attached to one vertical edge of the sliding door, a weight is in the cylinder and a cable connects the weight over a pulley in the top of the cylinder to an anchor in ... | 03/17/1987 |
| 4357732 | Automatic door closer kit An automatic door closer kit for a sliding door assembly comprising a doorway frame having first and second vertical jambs which are horizontally spaced and an upper horizontal lintel connecting across the two jambs and having two downwardly extending par... | 11/09/1982 |
| 4126912 | Closing attachment kit for sliding door and anti-friction support A unitary self-contained kit of components is readily attachable to a sliding door without modification of the door to effect gravity actuated closing. The kit includes a guide channel and pulley that are simply adhesively secured to an outwardly facing s... | 11/28/1978 |
| 4003102 | Door and window closer A spring or gravity motor having an override mechanism for a movable window or door including a pneumatic cylinder, a piston, a check valve admitting air to the cylinder, an override valve permitting pressure dumping of the air in the cylinder during move... | 01/18/1977 |
