FIELD: mechanics.
SUBSTANCE: proposed crossarm features two completely symmetric parts (1', 1") with their front sections (5', 6', 7' 5", 6", 7") make mainly S-like structure and rear sections (8', 9', 8", 9") form mainly L-like structure. Front straight sections (5', 5") are inserted into frame front surface pocket. Rear sections (9', 10', 9", 10") are turned inward to fit in frame rear surface prism structure slots. Rear short straight sections (10', 10") are integrated by separate semi-circular structure (11) with its lower apex located accurately on lengthwise axis of proposed bearing crossarm.
EFFECT: ruling out seat frame separation from locking elements.
6 cl, 10 dwg
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