Method and apparatus for mounting a fire damper

• US 5,623,796 A
• Filed: 03/29/1996
• Issued: 04/29/1997
• Est. Priority Date: 03/29/1996
• Status: Expired due to Fees

• Current Assignee: Francis J. Mccabe
• Original Assignee: Francis J. Mccabe
• Inventors: McCabe, Francis J.
• Primary Examiner(s): Friedman, Carl D.
• Assistant Examiner(s): Kang, Timothy B.
• Application Number:
  US08/625,795
• Time in Patent Office: 396 Days
• Field of Search: 52/220.8, 52/745.15, 52/745.16, 52/208, 52/213, 52/507, 249/39, 285/205, 285/189, 454/369, 454/271
• US Class Current: 52/220.8
• CPC Class Codes: A62C 2/16 multi-vane roll or fold-up type

Abstract

A damper is provided with a plurality of lugs on one side opposite to its face which lugs can be rotated to interfere with removing the damper from the wall in which it is mounted. The lugs can be rotated from the outside and fastened in position without having to go around the wall.

Claims

1. A fire damper mounting means comprising:

a frame;

a transversely extending outer flange attached to said frame for engagement with a first exterior surface of a wall surrounding a hole into which said fire damper is to be mounted;

lug means comprising a plurality of rotatable lugs mounted on said frame at spaced intervals along a face of said frame remote from and in a plane parallel to the outer flange of said frame;

said rotatable lugs being so positioned as to be capable of being rotated about an axis from a position of non-interference with the exterior surfaces of the wall forming the hole into which said damper is to be mounted, into an interfering position with a second exterior surface of the wall forming said hole, so as to be juxtaposed to the second surface of said wall upon rotation thereof to prevent said fire damper from being withdrawn from said hole; and

fastening means for engaging said frame and said lugs to prevent said lugs from being rotated to a non-interfering position once they have been rotated to a position of interference with the egress of said damper from said hole.

2. The invention of claim 1 wherein, said lug means further comprises a hole spaced from said axis;

and said frame comprises a hole equally spaced from said axis, so that said fastening means can be inserted through said hole in said frame and into said hole in said lug means to retain said lug means in its rotated position.

3. The invention of claim 2 wherein the lugs further comprise an external configuration allowing the lugs to be pivoted as aforesaid without interference with other portions of said frame.

4. A method of mounting a fire damper in a hole in a wall, comprising:

selecting a damper having a frame having the same frame depth as the thickness of the wall in which the damper is to be mounted, said frame having a plurality of rotatable lugs mounted thereon and having an outwardly extending external flange;

inserting the damper into said hole in said wall with the lugs in a non-interfering position with the hole in the wall;

insertion continuing until the outwardly extending flange on the outside of the damper engages a surface of the wall forming the hole into which the damper is being inserted;

then rotating the lugs into an interfering position which prevents egress of the damper from the hole in which it has been inserted; and

then inserting a fastening means through the damper frame and through the lugs themselves in a fastening engagement so as to prevent rotation of the lugs back to their non-interfering position.