公开(公告)号：US3771195A

公开(公告)日：1973-11-13

申请号：US3771195D

申请日：1972-06-02

申请人： TANSLEY H

发明人： TANSLEY H

IPC分类号： E05F3/10 ,  E05F3/22 ,  E05F15/20

CPC分类号： E05F3/102 ,  E05F3/223 ,  E05Y2900/132 ,  Y10T16/22 ,  Y10T16/2804

摘要： A door closer having an oil reservoir communicating with a tail end of a cylinder which is closed at its head end by a normally energized electromagnet. A piston which is operably linked to a door to be closed is normally at the head end of the cylinder when the door is closed is moved against the action of a return spring towards the tail end of the cylinder when the door is opened so that the door under the action of the return spring is normally urged to a closed position. The piston has a fluid passage having a check valve which permits free flow of fluid from the reservoir into the cylinder head end. A restricted fluid return passage ported at one end through the wall of the cylinder at the cylinder head end and communicating with the reservoir permits unrestricted flow of fluid from the cylinder to the reservoir when the door is swung to its closed position under the action of the return spring. A fero-magnetic valve element slidable in th cylinder is moved by the piston, when the door is opened, to a locking position against the electromagnet and closing the fluid return passage. The electromagnet, which is normally energized, maintains the valve element in said locking position to hydraulically lock the piston against return movement under the action of the return spring so as to maintain the door open. A compression spring between the valve element and electromagnet moves the valve element to a release position to open the fluid return passage when the magnet is de-energized and thus enable the return spring to close the door.

摘要翻译： 一个门关闭器，其具有与缸体的尾端连通的储油器，该缸体的头端由正常通电的电磁体封闭。 当门被打开时，可操作地连接到要关闭的门的活塞通常位于气缸的头端，当门打开时，门被关闭时克服着复位弹簧朝着气缸的尾端的动作而移动， 在复位弹簧的作用下的门通常被推动到关闭位置。 活塞具有具有止回阀的流体通道，其允许流体从储存器自由流动到气缸盖端部。 限制的流体返回通道在气缸头部端部通过气缸壁延伸并与油箱连通，允许液体从气缸到储存器的流动不受限制地流动，当阀门在阀门的作用下摆动到其关闭位置时 回春天 可在气缸中滑动的非磁性阀元件在门被打开时被活塞移动到抵靠电磁体的锁定位置并关闭流体返回通道。 通常通电的电磁体将阀元件保持在所述锁定位置，以在复位弹簧的作用下液压地锁定活塞以防止返回运动，以保持门的打开。 在阀元件和电磁体之间的压缩弹簧将阀元件移动到释放位置，以在磁体断电时打开流体返回通道，从而使复位弹簧能够关闭门。