10-11-2016 дата публикации
Номер: US20160326735A1
Принадлежит:
Hitherto known gratings for covering shafts, channels or similar structures comprise peripheral rails () cross-bars () that are joined to the peripheral rails () and consist of sheet metal sections, and longitudinal bars () joined to the cross-bars (). In order to provide a better foothold and improved anti-skid properties, the longitudinal bars () are secured to the cross-bars () in such a way that top stepping surfaces () of the longitudinal bars () are lower than or flush with at least stepping portions () of upper edges () of the cross-bars (). 113-. (canceled)14. A grating for covering shafts , channels or similar structures , comprising{'b': 10', '10, 'peripheral rails (, ′)'}{'b': 20', '10', '10, 'cross-bars () made of sheet metal sections connected to the peripheral rails (, ′),'}{'b': 30', '20, 'longitudinal bars () connected to the cross-bars (),'}{'b': 30', '20', '31', '30', '22', '20, 'characterized in that the longitudinal bars () are fixed to the cross-bars () in such a way that upper stepping surfaces () of the longitudinal bars () extend lower than or flush with at least stepping sections of upper edges () of the cross-bars ().'}151303132322031. The grating according to claim , characterized in that the longitudinal bars () have essentially U-shaped cross-sections with the upper stepping surfaces () and with shanks ( , ′) fixed in the cross-bars () , with the cross-bars preferably projecting upwards over the stepping surfaces ().163101011232320. The grating according to claim , characterized in that the peripheral rails ( , ′) have slots () , into which ends ( , ′) of the cross-bars () are inserted.1731010. The grating according to claim , characterized in that the peripheral rails ( , ′) are formed as sheet metal hollow profiles.1842323201010201010. The grating according to claim , characterized in that the ends ( , ′) of the cross-bars () are bent inside the peripheral rails ( , ′) in such a way that the cross-bars () are fixed to the peripheral ...
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