US 5,067,757 A · Panic exit device having noise suppression

Abstract

The Device is of the push pad type having a translating action rod which is biased in the latch bolt-extended position. An abutment is fixed to the action rod to receive thereagainst the extending plunger of a shock absorber which is removably coupled to an open guide base. The base is mounted on a base plate to support action rod operating bellcranks, and to support the action rod therein also. A shock absorber holder is clasped to the guide base, and the cylinder of the shock absorber, in which a viscous fluid is confined, is engaged by the holder to direct the plunger toward the abutment. In the depicted embodiment, the plunger resists retraction, to decelerate and damp the return of the push pad and action rod to their at-rest positions and, consequently, to suppress the operating noise of the panic exit device.

Claims6

Dependent claims

A panic exit device means for operating a latch having noise suppression, comprising:

a base including means defining a bearing surface;
a push pad operating means journalled to said base including a linear translating action rod means whereby translation of said rod in opposite axial directions operates a latch bolt in an opening direction and a locking direction;
and
shock absorber means having a viscous fluid damped spring extended plunger coupled to one and bearing without attachment on the other of said rod and said bearing surface for damping and shock absorbing axial translation of said rod in said locking direction without impeding its operation in said opening direction and for limiting linkage slack in both said opposite axial directions of said rod.

1 more element

Dependencies are inferred from the claim text.

Panic exit device having noise suppression

Life of this patent

Panic exit device having noise suppression

Life of this patent

Abstract

Claims6