| 摘要 |
1,210,639. Door closer. DORKEN & MANKEL K.G. 12 Aug., 1969 [17 Aug., 1968], No. 40349/69. Heading E2M. A door closer comprises an actuating shaft carrying a rotatable collar which engages a slot in a spring-loaded slide to guide the slide which is displaced longitudinally when the shaft is rotated by movement of the door. As shown, the slide 21 comprises two parallel plate members having longitudinal slots 23, the upper of which engages the rotatable collar 24 of an actuating shaft 16 and between which the rollers (22) operated on by a heartshaped cam 20 also carried by shaft 16. The slide 21 is connected to a rod 30 surrounded by a spring 33 and having at its free end a piston 32. The rotatable collar 24 may be carried on the shaft 16 by needle, ball, or roller bearings and has a shoulder 25 to locate the slide axially of the shaft. A stepped portion 28 of shaft 16 may engage with a certain amount of clearance the lower slot 23, or a second rotatable collar may be provided. A hydraulically supported stop means as described in co-pending Application No. 40350/69 is provided and the initial tension in the spring is adjustable as described in Specification 1,211,000. |
