Supports – Suspended supports – Fittings
Patent
1990-10-15
1991-06-18
Foss, J. Franklin
Supports
Suspended supports
Fittings
220 39, 248546, 248906, B42F 1300
Patent
active
050244124
ABSTRACT:
An expansible load-bearing junction box hanger assembly adapted for installation from beneath the ceiling and through a junction box opening in the ceiling, includes a pair of walls having a plurality of spike protrusions to engage two spaced adjoining ceiling joists and an elongated linearly expanding brace device which is aligned with and connected between the walls. The brace device expands from a short to a longer length to force each of the walls to contact and engage their respective ceiling joists. Each wall is provided with a receiving groove adjacent to the spike protrusions. The hanger assembly further includes an alarm device, a battery cell, and a contact switch disposed in each receiving groove and actuated when the walls engage their respective ceiling joists. The contact switches electrically connect the alarm device to the battery cell to operate the alarm device when actuated, thereby indicating that the hanger assembly has fully engaged the ceiling joists.
REFERENCES:
patent: 2302506 (1942-11-01), Richards
patent: 3797789 (1974-03-01), Wasson
patent: 4041657 (1977-08-01), Schuplin
patent: 4062512 (1977-12-01), Arnold
patent: 4391428 (1983-07-01), Grimes
patent: 4463923 (1984-08-01), Reiker
patent: 4513940 (1985-04-01), Alperin
patent: 4518141 (1985-05-01), Parkin
patent: 4538786 (1985-09-01), Manning
patent: 4645158 (1987-02-01), Manning
patent: 4659051 (1987-04-01), Propp
patent: 4667916 (1987-05-01), Richards
patent: 4682452 (1987-07-01), Propp
patent: 4684092 (1987-08-01), Reiker
patent: 4717099 (1988-01-01), Hubbard
patent: 4727352 (1988-02-01), Doller
patent: 4754947 (1988-07-01), Propp
patent: 4909405 (1990-03-01), Kerr
Hsu Tsui-Chen
Hung Shih-Ho
Foss J. Franklin
Llama Precision Inc.
LandOfFree
Hanger assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hanger assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hanger assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-141718