Abstract: Systems and methods for detecting and arresting free fall of a mover in a linear motor for an ESP. In one embodiment, the motor of the ESP is initially automatically commutated, but is limited by the back pressure of the fluid being pumped. The drive system of the ESP monitors the speed of the mover in the linear motor and determines whether the speed of the mover exceeds a threshold speed (e.g., by determining whether time differentials between transitions in position sensor signals fall below a threshold value). If the speed of the mover does not exceed the threshold speed, the motor is deemed not to be in free fall. If the speed of the mover exceeds the threshold speed, the motor is considered to be in free fall, so automatic commutation of the motor is disabled and the mover is advanced through its stroke at a predetermined speed.
Abstract: A washing machine comprises a tub in which a drum is rotatably mounted, and a storage tank having a flow connection to the tub via a feeding line provided with a pump and a three-port valve adapted to drive the flow to the drain or to the storage tank, rinsing fluid being stored in the storage tank for subsequent reuse. The washing machine further comprises a return pipe connecting the storage tank to the tub by means of a two-port valve, on such return line an auxiliary pump being placed and being used either for emptying the storage tank or for carrying out a spray washing.
Abstract: A mechanical protection device including: a transmission shaft having a main axis of rotation and an element that is frangible under a torsional overload; a movable member secured to the transmission shaft to rotate about the main axis and configured to move radially outwards relative to the main axis from a first position to a second position; a spring urging the movable member towards the first position; and a tangential abutment configured to stop rotation of the movable member about the main axis when the movable member is in the second position. The movable member and the spring are calibrated so that from a predetermined trigger angular speed the movable member moves from the first position to the second position under effect of centrifugal force greater than prestress of the spring.
April 12, 2012
Date of Patent:
December 8, 2015
Olivier Pierre Descubes, Olivier Bedrine, Isabelle Germaine Claude Ladeveze, Jean-Michel Pierre Claude Py
Abstract: An emergency stop system for a group of machine units (1), driven by energy from a source (2) is disclosed. The machine units are provided with a cut off means (3) for the energy feed, that can be acted upon via a receiver (5) by a transmitted signal, with a radio frequency, from a transmitter in a group of mobile units (7), provided with such, carried by one or several operators. Primarily the emergency stop systems is characterised in that every machine unit (1) is provided with a communication unit (4) in the form of a transmitter/receiver (5) for radio- resp. IR-frequency in contact with a computer unit (6). Each mobile unit (7) is provided with a transmitter/receiver for radio- resp. IR-frequency for identifying and authorizing communication. The cut off means (3) is provided not to be activated or inactivated without foregoing identifying and authorizing IR-communication.
March 19, 2005
December 17, 2009
Jan-Erik Ronny Olsson, Nils Peter Wilhelm Berg
Abstract: A method of operating a safety system for an industrial press having a moveable section and a stationary section, the safety system providing a plurality of continuous planar laser beams having a generally constant lateral width, each laser beam being spaced at varying distances from the moveable section, the method including moving the moveable section towards the stationary section at a relatively high speed; starting deceleration of the moveable section when one said laser beam reaches a speed control point located immediately adjacent the stationary section, moving the moveable section at a final crawl speed when a second said laser beam reaches the speed control point, the moveable section continuing to move at said final crawl speed towards said stationary section.
Abstract: The present invention comprises a clutch assembly having a housing, rotational arm and torque spring, in combination with a position sensor, such that excessive movement or obstruction within the path of the display assembly during deployment, as predefined by the system designer, results in stowage of a deployed on-board entertainment system display assembly.
September 25, 2000
Date of Patent:
February 14, 2006
Steven S. Seeley, James R. Dan, Steven C. Olauson
Abstract: A stop device with a shape memory actuator includes two stop elements sliding within a fixed support structure and usually hold in their mutual distant position by cam means pushed through spring means. A shape memory actuator is started through an electric current passage for causing the displacement of the cam means in a position wherein they permit the backward movement of the two stop elements towards a mutual close position.
Abstract: An actuation device is described, having:
an actuator with a movable actuation element;
at least a transmission element being capable of moving from a respective first operating condition to a respective second operating condition under the action of the actuation element. According to the invention, a hooking-release arrangement is provided, which is made operative by the actuation element during a displacement of the latter, for inducing in the transmission element a movement which occurs at least in part with a speed being higher than the speed of the displacement of the actuation element. The device has an advantageous use in the realization of systems for blocking, in a predetermined position, the drum of a machine for washing and/or drying laundry.
Abstract: A safety lock device including a clover mechanism mounted on a rotating shaft to be used with an unbalanced free-fall dog that precludes rotation of the rotating shaft upon rapid acceleration or excessive speed of the rotation of the shaft. The free-fall dog is pivotally mounted on a fulcrum upon which the free-fall dog may teeter in an unbalanced seesaw motion. At opposite ends of the fulcrum are a locking finger and an arm. The free-fall dog is unbalanced such that the arm contacts the clover mechanism as it rotates while the locking finger does not contact the clover mechanism at slow rotating speed. At a slow rotative speed, the arm is only slightly deflected. With great acceleration, the arm is deflected farther from the clover mechanism thereby causing the locking finger on the opposite side of the fulcrum to be pivoted into the clover mechanism.