Hold open control for a door closer
AssigneeJackson Corporation
InventorGeorge F. Toledo
Life of this patent
Estimating the term…
Abstract
A blocking device for preventing a door closer from achieving a degree of rotation corresponding to a door hold-open position. A blocking device is provided which can be selectively protruded into a door closer housing to block the translation of a cam plate under influence of a rotating cam operatively connected to one of either the door or the door frame such that the 90.degree. or 105.degree. typical door hold open position cannot be achieved. The blocking device can be a rotatable limit bar which can be positioned to an interference or no-interference position, or it can be screw pins which can be threadingly inserted into the housing to block either the cam or other moving portions of the door closer such that the closer cannot achieve the door hold open position.
Claims17
A door closer, comprising:
- a housing mounted to one of a door or a door frame;
- a spindle protruding from said housing and engaged to a respective other one of said door or said door frame to rotate proportionately to the rotation of a door to the door frame during opening and closing of the door the spindle passing through and being connected to a cam having a cam surface, the cam being eccentrically mounted to the spindle;
- a moving member which moves longitudinally within said housing in response to rotation of the spindle and the cam, the moving member being operatively connected to the spindle within said housing;
- a hold open means arranged in said housing for automatically engaging said cam at a select rotational angle of said spindle and said cam to seize said cam against a rotation of said spindle and said cam in a door closing direction;
- and
- a selectively actuatable block means which can be selectively rotated within said housing from a non-interfering position to an interfering position for interfering with said moving member to prevent said moving member from moving longitudinally and to prevent said spindle and said cam from rotating into said select rotational angle.
A door closer for mounting to one of a door or a door frame adjacent the door, for causing a force to close the door to the door frame, comprising:
- a housing;
- a spindle penetrating said housing and extending therefrom at a first end of said housing, and mounted for axial rotation with respect to said housing;
- a cam mounted within said housing, to said spindle for rotation therewith, said cam having a cam surface and a recess;
- a cam plate held within said housing and having a roller pressed to and riding on said cam surface, said plate movable longitudinally under force by said cam surface onto said roller when said cam is rotated, said cam and said cam plate having means for interlocking at a rotational position of said cam corresponding to an open position of said door;
- a means for biasing said cam plate to resist said forced movement of said cam plate by rotation of said cam;
- and
- a selectable blocking element arranged to be rotated within said housing to prevent movement of said cam to said rotational position.
In a door closer having a housing in which is held a reciprocating moving member, and a spindle protruding into said housing and having a cam fixed thereto, the cam having a cam surface for imparting a force on said member to move said member, and a spring for biasing said member toward a first direction to impart a rotation to said cam and said spindle corresponding to a door closing rotation direction, the cam and moving member having means applied therebetween for holding the door at an open and fixed rotational position against the urging of the spring toward a door closing rotation, the improvement comprising:
- a blocking device arranged for rotation within said housing to block movement of said cam and said reciprocating moving member into a position of engagement by said means for holding the door.
Dependencies are inferred from the claim text.