Abstract 1,050,496. Door closers. VEREINIGTE BAUBESCHLAGFABRIKEN GRETSCH & Co. G.m.b.H. Dec. 21, 1964 [Dec. 24, 1963], No. 51954/64. Heading E2M. In a closing device for doors in which a closer spring 8, Fig. 2 (not shown) and a hydraulic damping arrangement 9 both act on individual rocking arms operated by individual cams mounted on the door pivot spindle, the bore of the damping arrangement cam 7 Fig. 3 (not shown) is provided with stop surfaces 25, 26 which are aligned with abutment surfaces 28 on the spindle so that relative movement between the cam 7 and the spindle is possible. The hydraulic damping arrangement 9 consists of a cylinder 42 containing a piston 43 which is connected by a piston rod to the end of rocking arm 16 and houses a piston spring 40, said piston 43 acting at the end of its stroke to open a valve 47 in the end of the cylinder. Said valve 47 when operated by the piston 43 reduces the pressure in the cylinder as the cam 7 passes the "door closed" position and the cam 7 is rotated relative to the spindle by the piston spring 40. The valve 47 can also act as a pressure-relief valve for the cylinder. Before the valve 47 is operated a damping hydraulic pressure is achieved by restricting the flow of oil through a channel 44 in a pin 45, the amount of restriction being adjustable by a regulating screw 46.
IN A DOOR CHECK, A HOUSING CONTAINING A SUPPLY OF HYDRAULIC FLUID; A SPINDLE ROTATABLY MOUNTED IN AND HAVING AN END EXTENDING FROM SAID HOUSING; A CONTROL CAM MOUNTED ON THE SPINDLE IN SAID HOUSING; A SPRING-BIASED FOLLOWER FOR TRACKING AND FOR NORMALLY HOLDING SAID CONTROL CAM IN ANGULAR POSITION IN WHICH A SWINGING DOOR CONNECTED TO THE END OF SAID SPINDLE IS CLOSED; A CHECK CAM ANGULARLY MOVABLY MOUNTED ON THE SPINDLE IN SAID HOUSING, SAID SPINDLE AND SAID CHECK CAM HAVING COOPERATING PORTIONS FOR DETERMINING THE EXTENT OF RELATIVE ANGULAR MOVEMENT THEREBETWEEN; A SECOND FOLLOWER FOR TRACKING SAID CHECK CAM; AND A DAMPER MECHANISM PROVIDED IN SAID HOUSING AND OPERATIVE TO BIAS SAID SECOND FOLLOWER AGAINST SAID CHECK CAM, SAID DAMPER MECHANISM COMPRISING A CYLINDER MEMBER AND A PISTON MEMBER ONE OF WHICH OPERATIVELY CONNECTED WITH SAID SECOND FOLLOWER AND THE OTHER OF WHICH IS SECURED TO SAID HOUSING, SAID PISTON MEMBER BEING RECIPROCABLE IN SAID CYLINDER MEMBER TO RESPECTIVELY EXPEL AND DRAW FLUID FROM SAID HOUSING, AND RELIEF VALVE MEANS PROVIDED IN SAID CYLINDER MEMBER AND ARRANGED TO OPEN SHORTLY BEFORE SAID CHECH CAM REACHES A DEAD CENTER POSITION WITH REFERENCE TO SAID SECOND FOLLOWER WHILE SAID PISTON MEMBER MOVES IN A DIRECTION TO EXPEL FLUID FROM SAID CYLINDER MEMBER.
Claim 2
Dependent Claim
213 words
IN A DOOR CHECK, A HOUSING CONTAINING A SUPPLY OF HYDRAULIC FLUID; A SPINDLE ROTATABLY MOUNTED IN AND HAVING AN END EXTENDING FROM SAID HOUSING; A CONTROL CAM MOUNTED ON THE SPINDLE IN SAID HOUSING; A SPRING-BIASED FOLLOWER FOR TRACKING AND FOR NORMALLY HOLDING SAID CONTROL CAM IN ANGULAR POSITION IN WHICH A SWINGING DOOR CONNECTED TO THE END OF SAID SPINDLE IS CLOSED; A CHECK CAM ANGULARLY MOVABLY MOUNTED ON THE SPINDLE IN SAID HOUSING, SAID SPINDLE AND SAID CHECK CAM HAVING COOPERATING PORTIONS FOR DETERMINING THE EXTENT OF RELATIVE ANGULAR MOVEMENT THEREBETWEEN; A SECOND FOLLOWER FOR TRACKING SAID CHECK CAM; AND A DAMPER MECHANISM PROVIDED IN SAID HOUSING AND OPERATIVE TO BIAS SAID SECOND FOLLOWER AGAINST SAID CHECK CAM, SAID DAMPER MECHANISM COMPRISING A CYLINDER MEMBER AND A PISTON MEMBER ONE OF WHICH OPERATIVELY CONNECTED WITH SAID SECOND FOLLOWER AND THE OTHER OF WHICH IS SECURED TO SAID HOUSING, SAID PISTON MEMBER BEING RECIPROCABLE IN SAID CYLINDER MEMBER TO RESPECTIVELY EXPEL AND DRAW FLUID FROM SAID HOUSING, AND RELIEF VALVE MEANS PROVIDED IN SAID CYLINDER MEMBER AND ARRANGED TO OPEN SHORTLY BEFORE SAID CHECH CAM REACHES A DEAD CENTER POSITION WITH REFERENCE TO SAID SECOND FOLLOWER WHILE SAID PISTON MEMBER MOVES IN A DIRECTION TO EXPEL FLUID FROM SAID CYLINDER MEMBER.