Spectacle line blind with vent

Details Spectacle line blind with vent Spectacle line blind with vent

1982-09-30

1984-06-05

Bryant, III, James E.

Pipes and tubular conduits

With closures and plugs

Laterally insertable

138 44, F16L 5510

Patent

active

044522789

ABSTRACT:
A spectacle line blind includes a pivotable or rotatable spectacle plate having at one end a conventional full opening providing little obstruction to flow of liquid or gas. On the other end of the spectacle valve plate a blank disc seals one of said inlet and outlet ducts. The opposite side of this blank disc includes spacers having axial and radial openings therebetween which permit gases to vent to the atmosphere from the other duct.

REFERENCES:
patent: 2309304 (1943-01-01), Creighton
patent: 2419069 (1947-04-01), Griffin
patent: 2462731 (1949-02-01), Duggan
patent: 2709455 (1955-05-01), Greenwood
patent: 2726683 (1955-12-01), Seinbach
patent: 4343332 (1982-08-01), Williams et al.

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