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.
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 |
| 6651780 | Traction sheave elevator, hoisting unit and machine space Traction sheave elevator consisting of an elevator car moving along elevator guide rails, a counterweight moving along counterweight guide rails, a set of hoisting ropes (3) on which the elevator car and counterweight are suspended, and a drive machine un... | 11/25/2003 |
| 6161674 | People mover and drive apparatus A people mover such as an escalator or moving sidewalk is driven by a motor having a relatively small axial dimension and is configured to fit in available space, avoiding the need for a machine room for these components, thereby simplifying the incorpora... | 12/19/2000 |
| 6148962 | Traction sheave elevator, hoisting unit and machine space Traction sheave elevator consisting of an elevator car moving along elevator guide rails, a counterweight moving along counterweight guide rails, a set of hoisting ropes (3) on which the elevator car and counterweight are suspended, and a drive machine un... | 11/21/2000 |
| 6131704 | Elevator rail brake Rail brake (1) for an elevator, comprising a brake body attached to the elevator car, a clamp part comprising jaws (3,4) that engage a guide rail (2) via braking surfaces during braking. A spring (10) generates a load on the clamp part to press the brakin... | 10/17/2000 |
| 6109398 | Safety gear A safety gear (1) comprising a frame provided with a braking surface, which, when the safety gear is braking, is pressed against a first guide surface of a guide rail. Mounted in the frame is a roller (3), which moves along a track in the safety gear. The... | 08/29/2000 |
| 6050368 | Procedure and apparatus for controlling the hoisting motor of an elevator In the control of the hoisting motor (5) of an elevator, the output (25,125) of the motor drive is generated using a signal (23,127) proportional to the rotation of the hoisting motor as feedback signal during passages between floors. At or near a landing... | 04/18/2000 |
| 6026936 | Sliding safety gear A sliding safety gear designed to brake by gripping an elevator or counterweight guide rail includes a flexible frame surrounding the guide rail in the directions of the guiding surfaces of the guide rail. The frame is provided with a braking surface that... | 02/22/2000 |
| 6021873 | Procedure and apparatus for the measurement of elevator load A procedure and apparatus for the measurement of elevator load uses a load measuring apparatus. The elevator comprises an elevator car (17) travelling along guide rails (2) in an elevator shaft, a counter-weight (20), a hoisting machinery (18, 19), a cont... | 02/08/2000 |
| 5996742 | Elevator machinery The stator disc (11) of a disc motor type elevator machinery has a cuplike or ring-shaped annular cavity (20). The stator (9) is attached to one of the walls of the cavity. The traction sheave (4) is attached to the rotor disc (14) on the opposite side re... | 12/07/1999 |
| 5982060 | Elevator machinery The stator disc (18) of the motor (2) of a disc motor type elevator machinery is s provided with an annular cavity (19a) in which the stator (9) is placed. The stator (9) is attached to one of the walls of the cavity. The rotor (13) is placed in a rotor d... | 11/09/1999 |
| 5971109 | Arrangement for releasing the brake of an elevator machinery A manually activated elevator braking release including an actuating element placed away from the brake and a mechanical power transmission system for transmitting releasing power from the actuator to a brake element. The actuator is placed on a landing a... | 10/26/1999 |
| 5962948 | Elevator motor with flat construction An elevator motor (2) employing permanent magnets (30) attached in a circle on the surface (36) of the rotor disc (12). The rotor disc (12) forms part of both the magnetic circuit and the supporting structure of the rotor (13). The permanent magnets (30) ... | 10/05/1999 |
| 5950766 | Procedure for closing an elevator landing door, and a door coupler In the procedure for closing an elevator landing door (3,4), the landing door is coupled with the car door (1,2) by a door coupler, and the car door is moved by an actuator provided in conjunction with the elevator car. During the initial phase of the clo... | 09/14/1999 |
| 5934891 | Constant leakage flow, pulsation free screw pump The screw pump (1) has a driving screw (6) and at least one side screw (7), which are placed in a screw channel (5) in the pump body (2), between a suction space (3) and a pressure space (4). At least one of the clearances between the surfaces of the driv... | 08/10/1999 |
| 5915501 | Threshold for a landing door for a lift The threshold includes a shaped support plate of steel or the like with a sinuous profile which forms at least one longitudinal, substantially U-shaped loop between two raised portions. A profiled cover element of aluminum or the like is located on the pl... | 06/29/1999 |
| 5906251 | Traction sheave elevator Traction sheave elevator in which the drive machinery together with the traction sheave is placed in the elevator shaft. The hoisting ropes go upward from the traction sheave. In the cross-section of the elevator shaft, the vertical projections of the ele... | 05/25/1999 |
| 5904014 | Fireproof trim for a landing door for a lift The trim includes a fireproof profiled element (11) of incombustible material, preferably steel, with an L-shaped cross section having a first limb (11a) fixed to a jamb (1, 2) or transom (3) of the door frame and a second limb (11b) located adjacent the ... | 05/18/1999 |
| 5896948 | Reserve power system A reserve power system includes a reserve power machine (2) for the generation of power. The reserve power machine (2) is connected via a distribution network (4) to consumers (10,12) and elevator drives (8). The elevator drives include an elevator hoisti... | 04/27/1999 |
| 5894910 | Procedure for controlling an elevator A velocity-controlled elevator drive including an a.c. motor (28) driving elevator machinery regulated by means of a frequency converter (26) supplying the motor (28) with a controlled frequency and voltage. The load condition of the elevator is measured ... | 04/20/1999 |
| 5889240 | Arrangement in an elevator push button Push button arrangement for an elevator including a push button (7) with a mounting element (1), a mounting base (10), a cover plate (17) and a circuit card (3). The push button (7) is attached to the mounting element (1) using double-sided tape. The push... | 03/30/1999 |
| 5886696 | Display apparatus and method dynamically indicating elevator movement between floors by scrolling information In a display (202) comprised in an elevator system, more than one floor symbol (205) but less than all the floor symbols corresponding to different floors in the elevator system are highlighted at a time. At least the floor symbol corresponding to the cur... | 03/23/1999 |
| 5878847 | Arrangement for fixing an elevator rope According to the invention, at least one end of the elevator ropes (8) is fixed to a guide rail (4,7) of the elevator. According to an embodiment of the invention, the whole elevator is so suspended by its ropes (8) that all vertical forces are transmitte... | 03/09/1999 |
| 5847533 | Procedure and apparatus for braking a synchronous motor The invention relates to a method and an apparatus for braking a synchronous motor (2) magnetized with permanent magnets. According to the invention, there is connected to the input connectors (38,40,42) of the synchronous motor a non-linear braking resis... | 12/08/1998 |
| 5837948 | Elevator machinery The elevator machinery (26) comprises a motor (6) and its traction sheave (18). The rotor (17) is disc-shaped and air gap (ag) between it and the stator (14) can turn a plane which is substantially perpendicular to the shaft (13). The stator (14) forms a ... | 11/17/1998 |
| 5823298 | Traction sheave elevator Traction sheave elevator in which the drive machinery together with the traction sheave is placed in an elevator shaft provided with guide rails for the elevator care and the counterweight. The hoisting ropes go upward from the traction sheave. The elevat... | 10/20/1998 |
| 5821476 | Device for emergency operation of an elevator motor Device (100) for rotating an elevator motor during an emergency situation, such as a power failure, comprising a d.c. supply (4) and a rotary switch (8) used as a switching device for supplying a d.c. voltage into the windings (R-S, R-T, S-T) of the eleva... | 10/13/1998 |
| 5811906 | Damper winding of an elevator motor Damper winding (13) for an elevator motor provided with permanent magnets (14). The damper winding consists of frames (16) surrounding each permanent magnet (14). Each one of the frames is electrically connected to the adjacent frame (16) or the frames ar... | 09/22/1998 |
| 5798490 | Procedure and apparatus for determining the position of an elevator car A procedure for determining the position of an elevator car in which the code data contained in code units mounted in the building is read by means of a code data detector unit (4) in such manner that a code unit containing floor data and door zone data i... | 08/25/1998 |
| 5794746 | Door sill arrangement in an elevator car A door sill arrangement for an elevator has a profiled sill element with upper and lower grooves. First and second door panels of the elevator are provided with first and second sliding guides, respectively. The first and second sliding guides move in the... | 08/18/1998 |
| 5787020 | Procedure and apparatus for analyzing elevator operation The invention relates to a procedure and an apparatus for analyzing elevator functions and detecting deviating functions. By monitoring signals associated with traffic events in the elevator system, an analyzer connected to the elevator learns the normal ... | 07/28/1998 |
| 5783895 | Elevator motor with flat construction An elevator motor (2) employing permanent magnets (30) attached in a circle on the surface (36) of the rotor disc (12). The rotor disc (12) forms part of both the magnetic circuit and the supporting structure of the rotor (13). The permanent magnets (30) ... | 07/21/1998 |
| 5736694 | Method for providing a phone alarm call in an elevator system A system for regional and local supervision and monitoring of elevator equipment, that includes a modular system containing a service center set of equipment and an on-site set of equipment connected to at least one building. Communication between these s... | 04/07/1998 |
| 5736692 | Remote controller linkage to an elevator system A remote controller linkage is established to an elevator system having one or more elevators and using a data transmission network (21) comprising at least one serial communication bus for the transmission of control signals between the operating and/or ... | 04/07/1998 |
| 5734135 | Procedure for starting an elevator In a system for starting elevator machinery driven by a synchronous motor, current is fed to the motor by a frequency converter and a traction sheave is connected to the motor to move the elevator car with hoisting ropes. The angle of the magnetic field o... | 03/31/1998 |
| 5715913 | Door sill for an elevator car Sill system for an elevator car, comprising a sill profile (5), a lower door guide (7) movable in a slot (12) in the sill profile (5) and a guide holding bracket (9) for connecting the lower door guide (7) to the door. The guide holding bracket (9) is pas... | 02/10/1998 |
| 5714726 | Method for performing an alarm call in an elevator system A system for regional and local supervision and monitoring of elevator equipment, that includes a modular system containing a service center set of equipment and an on-site set of equipment connected to at least one building. Communication between these s... | 02/03/1998 |
| 5712457 | Apparatus for regulating an elevator motor The invention relates to an apparatus for regulating the speed of an a.c. elevator motor (10) by means of a frequency converter (8) consisting of a rectifier bridge (12) and an inverter bridge (14) with an intermediate circuit between them. The frequency ... | 01/27/1998 |
| 5690189 | Apparatus and method for locking and unlocking the door of an elevator car An apparatus for locking the door of an elevator car includes a lock (12) that locks the car door, a guide surface (9) in the elevator shaft at each landing and a linkage (6) operating the lock (12). The linkage includes an operating lever (17) which, whe... | 11/25/1997 |
| 5679934 | Programmable operating panel for an elevator car An operating panel (5) for an elevator car, containing car call buttons (7), signalling devices and other signs representing information. The control panel of the elevator car is replaced with a touchscreen display (1) incorporating a passage control feat... | 10/21/1997 |
| 5678660 | Overhead supporting beam for an elevator door and a door mechanism arrangement In the overhead supporting beam of an elevator door, the roller races (4,5) for the rollers of the door panels are formed from one piece with the overhead supporting beam (1). The door operating mechanism (11) with the door operating motor (15) is fitted ... | 10/21/1997 |
