Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1997-05-05
1999-05-04
Hughes, S. Thomas
Metal working
Method of mechanical manufacture
Assembling or joining
2952502, 527331, 5250606, 5274521, B23P 1100, E04B 918, E04G 2300
Patent
active
058989870
ABSTRACT:
A method of installing a grid for an acoustical ceiling to an existing ceiling, which eliminates the need for time-consuming manipulation of a fastener nut, makes use of a toggle fastener having a shaft with a stop collar at one end, with a spring loaded wing toggle at the other end, and a firestop element slidable along the shaft between the stop collar and the wing toggle, which is biased towards the wing toggle by a spring that is located on the shaft between the firestop element and the stop collar. The method comprises forming a hole in the existing ceiling; inserting the toggle fastener into the hole from the first side of the existing ceiling, until the wing toggle passes through the hole and reopens, with the firestop element remaining pressed against the existing ceiling by the spring to provide a positive closure of the hole in the existing ceiling; and affixing the grid for an acoustical ceiling to the toggle fastener. The firestop element may be a flat washer or a self-centering conically shaped washer.
REFERENCES:
patent: 3066775 (1962-12-01), Valsvik
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