David A Monaghan

US Patent:

41803523, Dec 25, 1979

Filed:

Nov 7, 1978

Appl. No.:

5/958578

Inventors:

Edward F. Divers - Pittsburgh PA
D. Randolph Berry - Sudbury MA
David A. Monaghan - Newtonville MA

Assignee:

The United States of America as represented by the Secretary of the
Interior - Washington DC

International Classification:

E21F 100
E21F 300

US Classification:

405303

Abstract:

An extensible brattice and cantilevered support system therefor comprises a brattice panel having first and second top sleeves and a weighted bottom sleeve suspended from selected roof bolts by a support system comprising a support to which the brattice panel is mounted and which defines a track, and mounting apparatus for each roof bolt comprising a coupler connected to the panel support in sliding engagement with the support track, an elongate member connected to the coupler, an upstanding, roof abutting leg member connected to the elongate member at a location longitudinally spaced from the coupler, and a member connecting the elongate member in depending relation to the associated roof bolt at a position on the elongate member intermediate the coupler and leg member.