Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7395782 | System and method for providing selective access to animal food A system and method for providing access to animal food utilizes identification tags on domestic animals, generally attached to a collar. The identification tag generates a signal that is detected by a receiver mounted on an enclosed food container. When the receive... | 07/08/2008 |
| 7350332 | Wall-mounted sliding door system and method A sliding wall-mounted interior door system that includes a telescoping door actuating mechanism that is attached to the upper portion of the door, and a roller assembly that extends horizontally from the wall and engages a track in the lower portion of the door. Th... | 04/01/2008 |
| 7342368 | Automated garage door closer An automated garage door closing device for a remote controlled overhead garage door wherein the device is mounted on one of a pair of parallel tracks receiving rollers suitably mounted on the outer edges of the door panels, the device including a switch housing con... | 03/11/2008 |
| 7311130 | Controlled drive for a garage door panel for the like The invention relates to a system to control the motor drive of a garage door panel which is reciprocatingly movable and guided along a predetermined track between two end positions, and possibly, one or more intermediate stop positions, said garage door panel inclu... | 12/25/2007 |
| 7194841 | Dressing room and curtain suspension device A fitting room (11) as a dressing room is adapted to have its entrance (12) opened and closed by drawing a curtain (14). The curtain is suspended from the tip ends of beam members of a curtain suspension apparatus (15) mounted on a ceilin... | 03/27/2007 |
| 7173516 | Operating system for a motorized barrier operator An operating system which utilizes a multi-functional wall station for a motorized barrier includes an operator for controlling movement of a barrier between various positions. The operator may receive signals from a wireless or wired wall station transmitter, a wir... | 02/06/2007 |
| 7138783 | Actuator with control unit and method for operating said actuator The actuator and the method for operating the actuator comprise a drive unit and a drive mechanism with mechanical components that can be moved against each other as well as an electronic control unit. One of at least two components that can be moved against each ot... | 11/21/2006 |
| 7118472 | Control system for pneumatically-powered door installation A mine door installation has a frame installed in a mine passageway. At least one door leaf is mounted on the frame for swinging movement between open and closed positions. Movement of the door leaf is powered by a pneumatic actuator. A pneumatically-powered control... | 10/10/2006 |
| 7024819 | Automatic door closing device A system includes a transmitter, a receiver, and a processor. The processor detects a trigger event. In response to the trigger event, the transmitter transmits a detection signal. If the receiver receives a reflected detection signal, the processor determines that ... | 04/11/2006 |
| 6994247 | Waste storage device A waste storage device includes an inlet aperture and a length of flexible tubing passing through the inlet aperture from a cassette. The flexible tubing is pinched by a pair of rollers which can have continuous surfaces or multiple paddles. The waste product is pla... | 02/07/2006 |
| 6921076 | Crane game grabber apparatus and method A crane game, of the sort popular in amusement arcades, has prizes supported on a horizontal surface arranged to move upwards as prizes are delivered to players. Prize separating posts extend through the movable horizontal surface to keep deformable prizes near the ... | 07/26/2005 |
| 6904642 | Closing device for gates and doors A closer device for a gate such as a swimming pool gate has relatively rotatable arms (for connection respectively to a gate and gate post), the arms being connected to a closer body having an axis parallel to the hinging axis of the gate on the gate post. The close... | 06/14/2005 |
| 6906487 | Anti-pinch window drive circuit An antipinch circuit prevents the motor driven closure of an automotive window if a soft obstacle is compressed between the window and the top of the door frame, and the window is opened in response to the sensing of the obstacle. The circuit measures the motor torq... | 06/14/2005 |
| 6350407 | Process for producing sintered product A method of manufacturing a sintered compact is disclosed herein. The method comprises the steps of: (1A) producing a green body containing metal powder, for example, by means of metal injection molding (MIM); (2A) compacting the green body by pressing it... | 02/26/2002 |
| 6091217 | Safety gate operator which prevents entrapment, and method of its operation An automatic gate operator includes an electric drive motor coupled by a drive train to a movable gate, and includes provisions for sensing an actual or impending obstruction or blockage of the movement of the gate by a human, object, or animal, for examp... | 07/18/2000 |
| 6075333 | Kit for retrofitting manually operated electric garage door to operate automatically A method and apparatus for retrofitting a manually operated commercial garage door opener to function automatically.... | 06/13/2000 |
| 6044588 | Window arrangement having a vibration generator to facilitate movement of a window pane A window pane is slidably driven in two guides by an electric motor. A piezoelectric vibrator vibrates the window pane to facilitate sliding movement of the window pane relative to the guides and a delay relay enables the vibrator to start operation befor... | 04/04/2000 |
| 5893234 | Time delay release mechanism for a fire barrier A time delay release mechanism has a brake actuator including an actuation member movable between engaged and released positions. The actuation member, when in the engaged position, operatively engages a fire barrier for preventing closure thereof. The ac... | 04/13/1999 |
| 5878530 | Remotely controllable automatic door operator permitting active and passive door operation A remotely controllable door operator system permitting active and passive use of a door includes a transmitter, a receiver, a master timing sequencing mechanism, a clutch-regulated prime mover that can actively move the door, and a mechanism that senses ... | 03/09/1999 |
| 5673514 | Time delay release mechanism for a fire barrier A time delay release mechanism has a brake actuator including an actuation member movable between engaged and released positions. The actuation member, when in the engaged position, operatively engages a fire barrier for preventing closure thereof. The ac... | 10/07/1997 |
| 5525880 | Pressure-actuated exit door access bar for an electronic delayed egress locking system An improved pressure-actuated control bar is disclosed which may be located on a door to control access or egress through the door, whereby the control bar is used to trigger unlocking or opening, or both unlocking and opening, of the door following press... | 06/11/1996 |
| 5428278 | Operating delay means for a hydraulic door closer A door closure delay system produces a first signal when a person approaches a doorway housing the door. The first signal is applied to a timing system and a voltage comparator so that a second signal is produced to limit closure of an open door. The seco... | 06/27/1995 |
| 5357183 | Automatic control and safety device for garage door opener A control device for garage door opener to provide automatic reclose and safety reverse if obstruction occurs is disclosed. Photoelectric sensors are positioned across the door opening to detect the passage of a vehicle through the door and signal the dev... | 10/18/1994 |
| 5282336 | Vehicle actuated fence gate The gate of this invention comprises a gate panel 10, a gate hinge mounting means 12 for mounting the gate panel to a hinge post 14 or the like, a gate latching closure means 16 mounted by the gate panel 10 for latching the gate in a closed condition to a... | 02/01/1994 |
| 5212908 | Cell door operating system A symmetrical cell door and operating system comprises a vertically shiftable locking bar mounted in a center column of a cell opening. A cell door is movable in either direction relative to the central column and has upwardly facing locking notches in a ... | 05/25/1993 |
| 5076016 | Powered sliding door system The present invention is a powered sliding door system for a vehicle including a semi-rigid cable adapted to be affixed to the sliding door of a vehicle and a powered electromagnetic clutch for driving the cable longitudinally for opening and closing the ... | 12/31/1991 |
| 5067276 | Semi-automatic gate A semi-automatic gate may be opened from a vehicle by pulling on a line attached to a counterbalance control mechanism. The counterbalance control mechanism comprises a cylinder having a damper-controlled flow of water arrangement which allows an enclosed... | 11/26/1991 |
| 5050346 | Automatic operating system for swinging door An automatic operating system for swinging doors which is controlled by the user by means of a miniature, hand-held radio transmitter having a single operating pushbutton. Depression of the pushbutton results, sequentially, in the retraction of the deadbo... | 09/24/1991 |
| 5040331 | Remote controlled opening device The invention relates to an automatic remote controlled opening device which may be used to open and close doors, windows or similar closure systems. The opening device includes a receiver to detect control signals generated at a remote location from the ... | 08/20/1991 |
| 5027553 | Garage door closing apparatus An add-on device for a motorized garage door opener for automatically closing the door after a delay following the opening of the garage door by a driver and movement of a vehicle out of the garage. The device automatically prevents the door being inadver... | 07/02/1991 |
| 4972629 | Remote controlled opening device The invention relates to an automatic remote controlled opening device which may be used to open and close doors, windows or similar closure systems. The opening device includes a receiver to detect control signals generated at a remote location from the ... | 11/27/1990 |
| 4831314 | Drive apparatus for opening and closing mechanism A drive apparatus for an opening and closing mechanism includes an electric motor, a clutch, a reduction gear unit and a timer mechanism. The clutch includes a coupling having first and second halves engageable with each other, and an actuator mechanism f... | 05/16/1989 |
| 4821024 | Door operator pre-warning system An advance warning system for an automatic electric door operator in which a command signal originating from a remotely located hand held radio transmitter or a wall switch located within the garage is received and processed by a signal receiver and trans... | 04/11/1989 |
| 4803482 | Exit control and surveillance system In the system, exits are provided with opening bars and locks. The system has a central post and control boxes. Each control box is associated with an exit and is connected to the central post. Activation of an opening bar initiates the sending of informa... | 02/07/1989 |
| 4652862 | Surveillance and control system for emergency exists installed in a building A building has at least one security guard post to control the secured building exits, each of which has an unlocking instrumentality, without forbidding their emergency use. When activating the unlocking instrument to open a secured exit, there is a tran... | 03/24/1987 |
| 4604826 | Automatic sliding door operator A solid state integrated regulating circuitry for incorporation in the conventional control circuitry of automatic sliding door systems includes timing and processing circuits operative through plural inverters to deliver enabling and disenabling electric... | 08/12/1986 |
| 4583517 | Fireplace screen The fireplace screen comprises a frame defining a central opening and including first and second pairs of vertical guide tracks along opposite lateral sides of the opening. A housing is mounted above the frame and a first flexible covering element is moun... | 04/22/1986 |
| 4571884 | Arrangement for lowering and lifting of a window of a motor vehicle door An arrangement for the lowering and lifting of a window of a motor vehicle door which includes a window lifter mechanism with a driving motor and an operating switch; for improving the closing operation of the vehicle door, particularly with regard to noi... | 02/25/1986 |
| 4502726 | Control apparatus for pivotal-sliding roof panel assembly A control apparatus for a pivotal/sliding roof panel powered by a reversible electric drive motor operative to move a roof panel from a closed position in a roof opening in a vehicle to either of a venting or an open position. The control apparatus includ... | 03/05/1985 |
| 4481887 | Security doors A security door and system for installation as the entrance and exit to a building or office to automatically control the passage of persons therethrough and to trap certain persons therein comprising a vestibule having side walls and oppositely disposed ... | 11/13/1984 |
