公开(公告)号：US3953940A

公开(公告)日：1976-05-04

申请号：US515495

申请日：1974-10-17

Applicant: Joseph Zaslow

Inventor： Joseph Zaslow

IPC: E05F1/00 ,  E06B5/12 ,  E06B11/04

CPC classification number: E05F1/002 ,  E06B5/12 ,  E05Y2900/10 ,  E05Y2900/132

Abstract: A counterforce assembly is described for use with doors that are exposed to high pressure differentials on the two sides thereof which result in large forces acting on the doors which tend to maintain the same closed against a door jamb and make the same difficult to open. The assembly includes a counterforce panel. The panel is typically hingedly mounted and has one major side thereof covered by a pressure shield. The covered side is vented to the low pressure side of the door and maintained at the low pressure while the other major side of the panel is exposed to the high pressure side, so that the panel is exposed to the same pressure differential as is the door and a resulting net force acts on the panel. Coupling means, which may be in the form of a pressure plate, a fulcrum arm, a linkage or a pulley arrangement, is connected to the panel and releasably connected to the door for applying the force acting on the panel to the door and counteracting the force acting on the door until the latter is opened and the pressures on the two sides of the door are equalized. The panel thereby counteracts the forces acting on the door and facilitates opening of the latter irrespective of the magnitudes of the pressure differentials to which the door and panel are exposed.

Abstract translation: 一种反力组件被描述为与在其两侧暴露于高压差的门一起使用，这导致作用在门上的大的力，倾向于将门保持相对于门边框的封闭并使其难以打开。 组件包括反力板。 面板通常铰接安装，并且其一个主要侧面被压力屏蔽覆盖。 被覆盖的一侧被排放到门的低压侧并保持在低压下，同时面板的另一个主面暴露在高压侧，使得面板暴露于与门相同的压力差 并且产生的净力作用在面板上。 可以是压板，支点臂，连杆或滑轮装置形式的联接装置连接到面板并且可释放地连接到门，用于将作用在面板上的力施加到门并抵消 作用在门上的力，直到打开门，并且门的两侧的压力相等。 因此，面板抵消作用在门上的力，并且有助于打开门，而不管门和面板暴露在哪里的压差的大小。