| 摘要 |
<p>The arm for the device for opening and extending windows, of the tilting and turning type, has one end mounted via a right-angle-protruding piece on a frame-fixed rotary bearing. Its angle is variable for arm effective length adjustment. The bearing piece turns for right or left stop fitting without involving arm detachment, as in the main patent. The bearing piece is of a symmetrically angular shape, with an internal side (152, 153) always engaging behind the setting unit (113) on one shank (144, 145), while with its other shank (143, 142) it is mounted about the axis (126) in the rotary bearing. Conversion from the right to the left stop position, or vice-versa, is simplified.</p> |
