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2. 发明专利

GB767545A Improvements in or relating to lid stays 未知
公开(公告)号：GB767545A
公开(公告)日：1957-02-06
申请号：GB2739654
申请日：1954-09-22
申请人： JAMES MORRISON GEORGE ADAMS
IPC分类号： E05C17/30
摘要： 767,545. Pneumatic dash pots. ADAMS, J. M. G. Sept. 14, 1955 [Sept. 22, 1954], No. 27396/54. Class 108(3). A lid stay comprises a cylinder A and piston B provided with means whereby air can flow freely past the piston in one direction only, the cylinder A having an air escape hole J controlled by an adjustable pressure release valve M comprising a resilient pad disposed in a chamber L2 into which the hole J opens, and adjusting means L for controlling the force of a spring N bearing on the pad M. In the construction shown, the piston B comprises a cupleather. It may however comprise a piston having a non-return valve. The chamber L2 is formed by a screw-threaded cap L enaging a threaded stem in which is formed the hole J. Alternatively the stem J2 may be hollowed out to form the chamber L2 which may be internally screwthreaded to receive a plug for adjusting the spring N. As applied to the lid of a cabinet, the piston rod C and cylinder A are connected to the relatively moving parts by means of a pivot pin on the end of the piston rod, Fig. 1 (not shown), and trunnion pins on the end of the cylinder. In operation, the cap L is adjusted so that valve M prevents escape of air from the cylinder when the piston B is bearing only the weight of the lid. Only a small additional force is thus necessary to close the lid.

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