| 摘要 |
A walker device (20) includes a frame assembly (30), which supports the user during operation and carries the other assemblies discussed below. Left and right front wheel assemblies (50) include a pivoting fork supporting a wheel, thereby allowing directional control over the walker during use. Left and right rear wheel assemblies (70) are fixed-direction. A brake assembly (90) allows the user to apply a frictional brake element to the both rear wheels, and prevents unwanted movement by the walker. A support sling assembly (190) carries some or all of the user's weight. Left and right lift cylinder assemblies (150), (170) lift and lower the support sling assembly to the desired elevation during use. A compressed air assembly (110) provides power to the lift cylinder assemblies. A valve assembly (130) provides independent control over both lift cylinder assemblies, to provide extra help to one side, if needed. |
