Face shield filter plate retention

Details Face shield filter plate retention Face shield filter plate retention

1990-12-06

1991-11-05

Schroeder, Werner H.

Apparel

Guard or protector

For wearer's head

A61F 906

Patent

active

050621564

ABSTRACT:
In face-protecting devices such as welder's shields and helments, a filter plate is supported on a support ledge adjacent the view port and is retained on the exterior of the device by a filter plate retainer adapted for attachment to the device.

REFERENCES:
patent: 1508907 (1924-09-01), Work
patent: 1795866 (1931-03-01), King
patent: 3056140 (1962-10-01), Lindblom
patent: 3257667 (1966-06-01), Anderson
patent: 3444561 (1969-05-01), Boyer
patent: 3577563 (1971-05-01), Raschke
patent: 4774723 (1988-10-01), Ruck

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