Track-type door hold-open device
AssigneeYale Security Inc.
InventorRalph T. Teague, Jr.
Life of this patent
Estimating the term…
Abstract
A door hold-open device is adapted to work with a conventional single-arm door closer. The device comprises a shoe moving along a track and connected to the closer operating arm. A detent in the form of a wheel is provided in the track which can be lowered through linkages by a solenoid to engage the shoe. Spring pressure on the detent can be adjusted in the field. The detent holds the shoe at one end of the track so that the door is held open. But the door can be forcibly closed causing the shoe to raise the detent, or the solenoid can be deactivated to raise the detent.
Claims12
A selectively operable hold-open device for use with a conventional single-arm door closer, mounted on a swinging door comprising:
- a. track means;
- b. shoe means adapted to be connected to the distal end of the door closer arm and to move along the track means, the shoe means having an upward nib;
- c. a latching cam pivoted intermediate its ends on a pin transverse to the track means, the cam having an incline adjacent one end and an overhang on the other end presenting an outwardly and downwardly facing latching notch;
- d. a first roller at the one end adapted to move toward and away from the cam and being supported to move against the incline to pivot the cam;
- e. power means to move the first roller against the incline;
- f. a detent arm mounted adjacent the latching cam and in line therewith along the track and extending down away from the cam;
- g. a second roller pivotally mounting the upper end of said detent arm and adapted to move toward and away from the cam and to butt against said latching notch when the latching cam is pivoted upon activation of the power means;
- h. detent means on the opposite end of the detent arm from the second roller;
- i. retaining means keeping said opposite end of the detent arm from dropping toward the track beyond a certain distance;
- j. horizontally disposed compression spring means mounted adjacent the track in compression against the detent means;
- k. stop means limiting the movement of the end of the spring means toward the detent means,
- whereby the detent means is in the path of the nib on the shoe when the power means is activated and the roller is against the latching notch on the cam and the detent means yields upwardly against the lateral force of the spring means when the door is brought to the fully open position or forcibly moved toward a more closed position from the open position, and the door is permitted to move freely from the open position when the detent means moves up as a result of the deactivation of the power means.
Dependencies are inferred from the claim text.