发明名称 Selectively movable seat arrangement and method
摘要 Disclosed herein is a selectively movable seat arrangement. The seat arrangement includes, one or more seat members movable between a passable position where a member is passable therethrough and an impassable position where the member is prevented from passing therethrough, and a counter in operable communication with the one or more seat members, the counter capable of allowing movement of the one or more seat members to the passable position to allow passage of a member a selected number of times and then to the impassable position thereby preventing passage of another such member for a period of time.
申请公布号 US8261761(B2) 申请公布日期 2012.09.11
申请号 US20090437412 申请日期 2009.05.07
申请人 GERRARD DAVID P.;XU YANG;BAKER HUGHES INCORPORATED 发明人 GERRARD DAVID P.;XU YANG
分类号 F16K29/00 主分类号 F16K29/00
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