Camber (ship)

Abstract: Eight nonimpaired subjects participated in a wheelchair exercise test using a motor-driven treadmill in order to study the effect of rear wheel camber on wheelchair ambulation The test consisted of four runs with rear wheels in 0, 3, 6, and 9 degrees camber at four speed steps of 2, 3, 4, and 5 km/hr There were no significant effects upon oxygen cost, heart rate, and mechanical efficiency The kinematic parameters of push time, push angle, and abduction showed differences between 3 and 6 degrees camber The relationship between the findings, using surface EMG results for six shoulder muscles, is discussed For one subject, data were extended to study the angular velocities of shoulder and elbow

Abstract: Camber (curvature) development during cofiring a two-layered structure of Ag film/low-dielectric-constant, low-temperature cofired ceramic (LTCC) green tape has been investigated. At a given thickness of Ag film, both the camber and camber rate decrease linearly with increasing the square thickness of LTCC. Densification mismatch between Ag and LTCC is attributed to be the root cause for the camber generation during cofiring. Mathematical analysis is made to theoretically describe the camber development, and the results show a fairly good agreement with experimental observations.

Abstract: The vehicle includes a suspended running chassis ( 1 ) making it possible to define a longitudinal and vertical plane forming a reference on the chassis ( 1 ), the preferred running direction being parallel to the longitudinal plane, and at least two wheel connecting systems, the wheels ( 2 ) of which are not aligned relative to the longitudinal plane, the wheel connecting systems being mounted on the chassis ( 1 ) on either side of the latter in the transverse direction, each of the wheel connecting systems including a wheel ( 2 ) mounted on a support ( 5 ) by means of a suspension device allowing vertical deflection of the wheel ( 2 ) relative to the support ( 5 ), the suspensions being independent of one another. Each support ( 5 ) is mounted on the chassis ( 1 ) by means of a camber mechanism which includes a camber lever ( 4 ) and an actuating lever ( 40 ) making it possible to vary the camber angle of the corresponding wheel ( 2 ). The camber mechanism includes an arm ( 70 ) mounted on the support ( 5 ) an axis of support oriented substantially parallel to the longitudinal plane, and mounted on the chassis ( 1 ) without any possibility of tilting about a longitudinal axis relative to the chassis ( 1 ), so as to transmit the weight carried by the chassis to the support ( 5 ).

Abstract: A machine for assisting a partially ambulatory user to rise and move about. The wheeled frame comprises a rigid, U-shaped base which supports a pair of upwardly extending sides. The frame sides border an open front in which the user is received. Rigid hand rails associated with the frame sides and a push-handle associated with the frame rear may be grasped by the user for support. A cushioned yoke engages the user's torso to support body weight. The yoke may be interchanged with a custom yoke which conforms to the user's body. The yoke is pivotally coupled to a winch-driven linkage assembly comprising a pair of cooperating levers mounted for movement within the frame interior. The top and bottom levers pivot about pivot points defined by bearings coupled to the frame sides. The levers are of different lengths, and their pivot points are offset, so that the camber of the yoke varies during operation. The linkage assembly is driven by a battery-powered winch. Electrical switches associated with the yoke or the hand rails are conveniently accessed by the user to activate the winch. As the user rises from a seated position, the yoke undergoes camber loss until it reaches an intermediate position of maximum negative camber. Camber gain occurs as the yoke rises to its uppermost position of maximum positive camber. The user is thus comfortably and positively supported.