Attachment system for replacement helmet respirator lens
Assignee3M Innovative Properties Company
InventorsGary A. Baribeau, James A. Burns, William A. Mittelstadt, William J. Swanson
Life of this patent
Estimating the term…
Abstract
A replaceable lens attachment system for respiratory devices and methods of use. The replaceable lens attachment system includes a face shield having rotatable attachment members and a replaceable lens. The rotatable attachment members include cams and flanges. The attachment system may further comprise a helmet respirator with support elements disposed thereon. The method includes bowing the lens and inserting it into the frame. The rotatable attachment members are rotated to urge the lens into the frame and cover the frame. The flanges and support elements provide impact resistance to the lens.
Claims23
A respiratory lens attachment system, comprising:
- a. an arcuate face shield frame having an inside surface and a plurality of rotatable attachment members disposed on said inside surface, an attachment member comprising a cam and a flange;
- and
- b. a replaceable bowed lens, wherein said attachment cam urges said lens against the inside surface of said face shield frame and said flange covers a portion of said lens.
A respiratory lens attachment system, comprising:
- a. a helmet respirator with a support element;
- b. a face shield frame attached to said helmet respirator, said face shield frame having an inside surface including a plurality of attachment members, an attachment member comprising a cam and a flange, said attachment members disposed on the inside surface of said frame;
- and
- c. a replaceable bowed lens, wherein said cam urges said lens against said inside surface of said face shield frame and said flange covers a portion of said lens.
A method of inserting a replaceable face shield lens in a respiratory device, comprising:
- a. providing a helmet respirator having a support member and a face shield frame attached thereto, said face shield frame having an inside surface with rotatable attachment members disposed on said inside surface, said attachment members having a cam and a flange;
- b. bowing a flat lens and inserting said lens into said frame;
- and
- c. rotating said attachment members such that the cam urges said lens against said inside surface of said face shield frame and said flange covers a portion of the lens, said support members and said flanges providing impact resistance to the lens.
Dependencies are inferred from the claim text.