摘要:
A center-of-gravity tilt-in-space wheelchair includes a base, a seat for supporting an occupant, and tracks supporting the seat for selective seat movement relative to the base. Wheels are adapted to support the base relative to a supporting surface. The tracks serve as rolling or sliding surfaces that allow the seat to rotate with respect to the base. Each track has a constant-radius arc with a focal point that is adapted to be coincident with the center of gravity of the wheelchair occupant. A low-friction supports the base relative to the seat. The low-friction support may include low friction elements that mate with the tracks to support for the tracks. The support can be adjustable to permit the overall tilt angle range of the tracks to be adjusted. The wheelchair seat can be adjusted to maintain the focal point of the constant-radius arc of the tracks coincident with the center of gravity of the wheelchair occupant. The front and rear wheels can be adjusted fore and aft relative to the focal point. A coupling includes plates having upper ends operatively attached to one another with seat canes therebetween and lower ends releasably attached relative to the side tubes. The lower ends can be movable in a longitudinal direction relative to the side tubes while remaining operatively connected to the side tubes. A base frame can include side frames having an offset at a front end and a caster housing supported by the offset. The offset is directed up to minimize the height of the side frames and down to maximize the height.
摘要:
The vehicle comprises a base and a seat moveable along a curve having a focal point. The vehicle is adjustable to position an occupant in the seat to achieve a desired position for the center of gravity of the occupant relative to the focal point of the curve. A method for minimizing effort required to tilt the seat of a personal mobility vehicle comprises the steps of providing a personal mobility vehicle having a seat that is adapted to move along an arc having a center of curvature, positioning the seat substantially horizontally, providing an occupant in the seat, and adjusting the position of the vehicle occupant's center of gravity so that the center of gravity is substantially equal to or below the center of curvature of the arc.
摘要:
The vehicle comprises a base and a seat moveable along a curve having a focal point. The vehicle is adjustable to position an occupant in the seat to achieve a desired position for the center of gravity of the occupant relative to the focal point of the curve. A method for minimizing effort required to tilt the seat of a personal mobility vehicle comprises the steps of providing a personal mobility vehicle having a seat that is adapted to move along an arc having a center of curvature, positioning the seat substantially horizontally, providing an occupant in the seat, and adjusting the position of the vehicle occupant's center of gravity so that the center of gravity is substantially equal to or below the center of curvature of the arc.
摘要:
Disclosed is a vehicle, in particular rail vehicle, with a wagon body and an running gear on which the wagon body is supported, wherein the wagon body and the running gear define a vehicle longitudinal direction, a vehicle transverse direction and a vehicle height direction. A tilting mechanism is arranged between the wagon body and the running gear, which is designed to impose, during a transverse displacement in the vehicle transverse direction, upon the wagon body a rolling motion about a rolling axis parallel to the vehicle longitudinal direction. The tilting mechanism comprises a transverse decoupling device, which is designed to reduce the stiffness of the tilting mechanism against a pure transverse displacement of the wagon body with respect to the running gear. The invention furthermore relates to a corresponding tilting mechanism.
摘要:
A rail vehicle having a car body, which is supported on a running gear by a spring device, and a rolling compensation device, which is coupled to the running gear and the car body. The rolling compensation device may be arranged kinematically in parallel to the spring device. The rolling compensation device counteracts rolling motions of the car body toward the outside of the curve about a rolling axis during travel in curves. The rolling compensation device, in order to increase the tilting comfort, is designed to impose, in a first frequency range and under a first transverse deflection of the car body, upon the car body, a first rolling angle about the rolling axis, which corresponds to a current curvature of a current section of track being traveled.
摘要:
The present invention relates to a method for oligomerization or polymerization of ethylene and/or alpha-olefins utilizing reactor equipment and other equipment wherein starting material comprising monomer(s), catalyst, cocatalyst and solvent is transferred to the reactor equipment via first piping, and product material comprising oligomer and/or polymer, non-reacted monomer(s), catalyst, cocatalyst and solvent is discharged from the reactor equipment via second piping, characterized in that the first piping, second piping, reactor equipment and/or other equipment are flushed with a product fraction obtained by said or a respective previous method prior to and/or after that oligomerization or polymerization method.
摘要:
The invention relates to a measurement bearing, in particular for a wheel set of a rail vehicle, having a rotational axle and at least one first bearing ring (103), wherein the first bearing ring (103) defines a main supporting direction and a circumferential direction extending transversely with respect to the main supporting direction, and the first bearing ring (103; 203) is designed to take up bearing forces which have at least one force component in the main supporting direction, and during operation said bearing forces are applied to the first bearing ring (103) via a plurality of rolling bodies (104). The first bearing ring (103) has at least one first recess (105) in which a sensor device (110) is arranged, wherein the sensor device (110) is designed to sense a sensing variable which represents the bearing forces which are applied to the first bearing ring (103).
摘要:
The invention relates to a module for reproducing a transmitter signal (xactE). A control device (1) is coupled to a driving device (4a) for controlling a machine while being coupled to the module (5, 5′) via a data bus (7) for exchanging data. A reproduced transmitter signal (xactEn) is determined from a reference value (xdes) that is predefined by the control device with the aid of the module (5, 5′). The module (5, 5′) is logically coupled to the control device (1) via the data bus (7) in such a way that the module (5, 5′) is projected in the same way as the driving device (4a) from the perspective of the control device (1). The inventive module (5, 5′) for reproducing a transmitter signal (xactE) thus makes it possible to project, start, and adjust the dynamics of the machine in a simple manner.
摘要:
A tin-silver coating for use with circuit boards, which can include a conductive circuit with an exposed surface disposed on a substrate. The tin-silver coating covers the exposed surface of the conductive circuit. The conductive circuit can include electrical traces, contact pads and vias, each of which may include or be formed of copper. In one embodiment, the tin-silver coating can include a tin weight percentage between 85 and 99.5%, while the silver weight percentage can be between 0.5 and 15%. In one embodiment the tin-silver coating can be between 35 and 60 millionths of an inch. A barrier plate may also be included between the conductive circuit and the tin-silver coating.
摘要:
A tin-silver press-fit interconnect which includes a press-fit terminal having a coating or finish of a tin-silver compound for use with a terminal receiving device. The tin-silver compound serves to prevent the formation of tin whiskers which appear most frequently in pure tin coated electrical components under mechanical stress and which make the electronic device susceptible to short circuits. The tin-silver compound may include between 85 and 99.5% weight of tin and between 0.5 and 15% weight of silver and is applied at a thickness range between 0.4 and 5 microns using a technique such as electroplating, hot dip or immersion.