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公开(公告)号：US20190116948A1
公开(公告)日：2019-04-25
申请号：US16093614
申请日：2016-04-12
摘要： A strutless umbrella frame for supporting a canopy, the strutless umbrella f comprising a central post, a plurality of ribs each pivotally mounted to the central post about a pivot axis, an actuator arranged for operating the umbrella frame between the closed and open position; and a connection arranged for hingendly connecting each of the plurality of ribs to the actuator. The actuator comprises at least one air spring and first regulator and a second fluid regulator. The actuator is configured for opening the umbrella, in response to a predetermined opening force applied initially by the pivoting movement of at least one of ribs, and for closing the umbrella in response to a predetermined closing force applied initially by the pivoting movement of the at least one of the ribs.
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公开(公告)号：US10813427B2
公开(公告)日：2020-10-27
申请号：US16093614
申请日：2016-04-12
摘要： A strutless umbrella frame for supporting a canopy, the strutless umbrella frame comprising a central post, a plurality of ribs each pivotally mounted to the central post about a pivot axis, an actuator arranged for operating the umbrella frame between the closed and open position; and a connection arranged for hingendly connecting each of the plurality of ribs to the actuator. The actuator comprises at least one air spring and first regulator and a second fluid regulator. The actuator is configured for opening the umbrella, in response to a predetermined opening force applied initially by the pivoting movement of at least one of ribs, and for closing the umbrella in response to a predetermined closing force applied initially by the pivoting movement of the at least one of the ribs.
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