Abstract:
An ophthalmic surgical apparatus may include a tower extending upward from a support base, and a user-positionable arm extending from the tower to support an optical instrument attached to a distal end of the user-positionable arm. The user-positionable arm may include four members that are pivotably connected to each other. An electromagnetic brake strut (250) may be pivotably attached in a diagonal relationship to at least two of the four members (232,234,236,238). The electromagnetic brake strut may include a rotatable lead screw (360) having first and second lead screw end regions and a nut (370) attached to the first pivot joint. The first lead screw end region may be threadably received into the nut. An electromagnetic clutch (380) allows lead screw rotation when an electrical voltage is applied thereto. The electromagnetic clutch may be attached to the second pivot joint and may include a bearing that supports the second lead screw end region.
Abstract:
Eine Klemm- und/oder Bremsvorrichtung (1) umfassend wenigstens zwei Klemmelemente (3a, 3b) mit je einem die Klemm- und/oder Bremswirkung auslösenden Nehmerkolben (4a, 4b) und einem Aktorsystem zur Erzeugung einer Kraft, die auf die Nehmerkolben (4a, 4b) übertragen wird, soll bei besonders energieeffizienter und kompakter Bauweise trotzdem höchste Sicherheitsanforderungen und Normen erfüllen. Das Aktorsystem ist als Doppelaktorsystem (10) ausgebildet.
Abstract:
The invention relates to an electromagnetic brake and to a method for manufacturing an electromagnetic brake. The electromagnetic brake comprises a coil former (1), a coil (2), which is fitted on the coil former (1), and also an electrically connecting part (3), which is equipped to make an electrically conductive contact between the coil (2) and the power supply cable (6) supplying current to the electromagnetic brake.
Abstract:
The invention relates to a power tool braking device, in particular a hand-held power tool braking device, of a portable power tool (12a; 12b; 12c; 12d) having at least one magnetic field braking unit (14a; 14b; 14c; 14d). According to the invention, said power tool braking device comprises at least one mechanical activation unit (16a; 16b; 16c; 16d).
Abstract:
A brake (110, 110a, 110b) for applying torque upon a rotatable component (120) is provided. The brake (110, 110a, 110b) may comprise a first flange (112, 112a, 112b) and a second flange (114, 114a, 114b), each of the first and second flanges (112, 112a, 112b, 114, 114a, 114b) having respective first and second sets of poles (122, 122a, 122b, 124, 124a, 124b) extending therefrom. The second flange (114, 114a, 114b) may be coupled to the rotatable component (120) and disposed proximate to the first flange (112, 112a, 112b) such that the second set of poles (124, 124a, 124b) is disposed in close proximity to the first set of poles (122, 122a, 122b). The brake (110, HOa, 110b) may also comprise a ring assembly (125, 125a, 125b) that is disposed between the first and second flanges (112, 112a, 112b, 114, 114a, 114b). The ring assembly (125, 125a, 125b) may include a permanent magnet ring (126, 126a, 126b), one or more magnetic cores (128, 128a, 128b) and a brake coil (130, 130a, 130b).
Abstract:
An electromagnetic brake (34) includes a hub (48) disposed about a shaft and configured for rotation with the shaft about a rotational axis (38). An electromagnet assembly is fixed against rotation about the axis (38) and includes a housing (64) defining axially extending, radially spaced inner (74) and outer (78) poles and a brake plate (80) extending radially therebetween. A conductor (66) is disposed between the poles on one side of the brake plate (80). An armature (96) is disposed on the other side of the brake plate (80) and coupled to a body driven by the shaft. The electromagnet assembly, armature (96) and hub (48) form an electromagnetic circuit when the conductor (66) is energized urging the armature (96) towards the brake plate (80). A portion of the magnetic flux in the circuit travels radially inwardly across a first radial air gap from the inner pole (74) to the hub (48) and then radially outwardly across a second radial air gap from the hub (48) to the brake plate (80).
Abstract:
Es wird ein Herstellungsverfahren für eine Pendelanordnung einer Pendellaservorrichtung (10) vorgeschlagen, dass zumindest ein Verfahrensschritt, bei dem ein Kreuzgelenk (32) eines Pendels (28) der Pendelanordnung mittels Kunststoff-Spritzgießtechnik unter Formung zweier orthogonaler, mit Wälzlagern (36a,36b) bestückten Wellen (50a, 50b), gefertigt wird, und einen zweiten Verfahrensschritt, bei dem ein Optikträger (30) des Pendels (28) der Pendelanordnung mittels Kunststoff-Spritzgießtechnik einstückig, insbesondere form- und kraftschlüssig, mit dem Kreuzgelenk (32) gefertigt wird, aufweist.
Abstract:
Described herein are braking mechanisms and related methods of use using eddy current interactions to resist relative movement between members, the magnetic flux about an eddy current region being modified beyond an inherent drag effect resulting from a simple magnetic pole arrangement.