GB833844A - Holding device for use between two relatively movable structures - Google Patents

Abstract

833,844. Door stays. SCHONITZER, R. I. March 7, 1958 [April 3, 1957], No. 7370/58. Class 65(1)] A holding device for use between relatively movable structures comprises an arm for connection to one structure of a body, through which the arm passes, which has limited movement relative to the other, structure and carries means responsive to that movement to clamp or release the arm. As applied to a door check in which a vehicle door is held, against the weight of the door, in an open position, but is released when further door closing effort is applied, the device comprises, Figs. 2 and 5, an arm 13 pivoted to the door frame and extending between the plates 29a, 29b, forming a body 29 which is movable within limits between two walls 22, 23 of the door. The plates are connected at one end by a pin 35 which carries spring washers 52 to form one clamping element, and at the other end by a pin 37 engaging elongated holes 38 in the plates, springs 48, one each side of the body 29, engaging grooves 36 in the pins. The pin 37 forms a pivot for an actuating member 33 provided with an arcuate cam edge 43, a clamping element 31 and a pin 55 which extends through an elongated hole 56 in each plate. The arm carries at its free end a disc 62 which abuts a flexible bumper 63 on the wall 23 when the door is fully open. As the door is opened, Fig. 6, the wall 22 abuts the spring 48 to tilt the body 29, the pin 55 of the actuating member 33 being then disposed in the end of the elongated hole nearer the wall 22, the arm passing freely through the body. When the door is released, Fig. 7, and moves by its own weight towards the closed position the door wall abuts the cam edge 43 of the actuating member to rotate it clockwise about the pin 37, when the clamping element 31 forces the arm between the spring washers 52 of the abutment element to hold the door in the open position. On the application of further door closing effort, the wall 23 further rotates the actuating element and the pin 55 moves across the line of action of the spring force on the pin 37 to the other end of the elongated hole 56, releasing the clamping force applied by the clamping element 31 to the arm, and the door moves towards. its closed position. When the door is fully closed the clamping element engages a notch 60 in the arm so that when the door is again opened the actuating member is tripped back into the position shown in Fig. 6, the pin 55 returning through the dead centre position to the first mentioned end of the elongated hole 56. In a modification the body carries a roller acting as both a stop and a guide for the arm 13.