US 6,386,597 B1 · Dual latch retraction system for exit bar

Abstract

An exit bar for securing a door has a housing assembly adapted for mounting to a door. A push pad for receiving a push force is mounted to the housing assembly. A latch is pivotable relative to the housing assembly to releasably latch the door to which the exit bar is mounted. A mechanical retraction system links the push bar to the latch so that a push force exerted on the push pad releases the latch. A selectively operable electromagnet is disposed within the housing assembly. An electromagnetic retraction system links the electromagnet to the latch independently of the mechanical retraction system so that selective operation of the electromagnet retracts the latch. The electromagnet further dogs the electromagnetic retraction system, and thereby the latch, in the retracted condition as long as the electromagnet receives power. The push bar and mechanical retraction system may be dogged by the electromagnet upon the first exertion of a push force thereon.

Claims20

Dependent claims

An exit bar comprising:

a housing assembly including a latch face defining an opening and defining a longitudinal axis;
a push bar mounted for displacement relative to said housing assembly, said displacement being substantially orthogonal to said longitudinal axis;
a latch assembly including a latch bolt pivotally mounted to said housing assembly and projectable through said opening;
a spring for biasing said latch bolt toward an extended position;
first retraction means displaceable between an outward position and an inward position in response to a force applied to said push bar for actuating said latch assembly to retract said latch bolt to a retracted position upon displacement of said first retraction means to said inward position;
and
second retraction means responsive to an electrical current for actuating said latch assembly to retract said latch bolt to a retracted position, said second retraction means comprising an electromagnet mounted within said housing assembly with an attractive face parallel to said longitudinal axis;
wherein said first retraction means and said second retraction means actuate said latch assembly independently of one another.

5 more elements

An exit bar for selectively securing a door to a door frame having a strike, comprising:

a housing assembly with a longitudinal axis mounted to a secure side of said door;
a latch assembly comprising:
a latch bolt pivotally mounted to said housing assembly and projectable to an extended position within said strike,
a lift link with a first end cammingly engaging said latch bolt and a second end substantially parallel to said door side, said lift link pivotally mounted to said housing assembly intermediate said first and second ends;
a manual retraction assembly engageable with said lift link to push said second end toward said door and thereby pivot said latch bolt to a retracted position withdrawn from said strike;
an electromagnetic retraction assembly engageable with said lift link to pull said second end toward said door and thereby pivot said latch bolt to said retracted position, wherein said manual retraction assembly and said electromagnetic retraction assembly engage said lift link second end independently of each other.

3 more elements

A door security system comprising;

a door frame having a door pivotally mounted to one side and a strike fixedly mounted to an opposing side;
an exit bar mounted to a secure face of said door, said exit bar comprising;
a housing with a longitudinal axis;
a latch assembly, said latch assembly including a latch bolt pivotally mounted relative to said housing and projectable to an extended position within said strike,
a manual retraction assembly displaceable between an outward position away from said door face and an inward position closer to said door face, said manual retraction assembly actuateable to pivot said latch bolt to a retracted position withdrawn from said strike, and
an electrical retraction assembly actuateable to pivot said latch bolt to said retracted position said electrical retraction assembly comprising a retraction_armature with an attracted face and an electromagnet fixedly mounted relative to said housing with an attractive face parallel to said door face,
wherein said manual retraction assembly and said electrical retraction assembly engage said latch assembly independently of each other;
a power source operably connected to said exit bar;
and a remote control system operably connected to said exit bar.

6 more elements

Dependencies are inferred from the claim text.

Dual latch retraction system for exit bar

Life of this patent

Dual latch retraction system for exit bar

Life of this patent

Abstract

Claims20