| 摘要 |
A valve has a valve housing and a stem projecting from the housing and rotatable relative thereto about an axis. A handle assembly for the valve has an abutment directed angularly in one direction of the axis and fixed relative to the housing, a knob, and formations on the knob and stem for rotationally fixing the knob on the stem and for axial displacement of the knob on the stem between a normal use position and an override position. A knob abutment projecting axially from the knob is directed angularly opposite the housing abutment. The knob abutment is angularly engageable with the housing abutment in the normal use position but is able to pass angularly past the housing abutment in the override position. Thus the knob is in the normal use position most of the time. In order, however, to gain increased flow, a higher temperature, or divert water from the tub to the shower, it is displaced into the override position. The same knob used for flow control or temperature adjustment is simply pulled or pushed as it is turned, normally pulled, in order to go beyond the normal end position defined by engagement of the abutments with each other.
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