Window shield for respiratory mask and protective helmuts

Claim 2

A face mask construction, particularly an oxygen mask or similar respiratory mask or protective helmet, comprising a mask body having a large window area thereon with a curved viewing window of a transparent material having a curvature extending over substantially its whole viewing area, a pivot bushing extending through said mask adjacent each side of said window, a pivot member rotatably supported in each of said bushings and having an exterior handle end and an interior inwardly extending end, a wiper body extending between said pivot members and connected to the interior ends thereof, said wiper body being of resilient material and being held by said interior end in a position to bear resiliently against the interior surface of said window, said pivot members being rotatable to move said wiper body through a path between the opposite edges thereof.

Claim 3

A face mask construction, according to claim 1, wherein said wiper body comprises a continuous coil spring having a covering of wiper material thereover.

Claim 4

A face mask construction, according to claim 1, wherein said wiper body includes a resilient interior member of a cross-section other than a round cross-section.

Claim 5

A face mask construction, according to claim 1, wherein said wiper body includes an interior resilient member, a covering of absorbent material and an outer sheath covering said absorbent material.

Claim 6

A face mask construction, according to claim 1, wherein said bushings extend through said window shield.

Claim 7

A face mask construction, according to claim 1, wherein said bushings extend through said mask body.

Claim 8

A face mask construction, according to claim 1, wherein each of said pivot members includes an annular groove intermediate its length at the location in which it extends through said bushing and an annular resilient seal member in said groove.

Claim 9

A face mask construction, according to claim 1, wherein each of said pivot member handle portions comprise enlarged outwardly extending handles extending at right angles to the axis of said pivot member.

Claim 10

A face mask construction, according to claim 1, wherein at least one end of said wiper body is detachably connected to its associated pivot member.

Claim 11

A windshield wiper for a respiratory mask window, comprising a partially cylindrical viewing window curved over its entire area, an elongated resilient wiper body engaged on the curved surface of said window, a rotatable pivot member connected to each end of said wiper body and projecting inwardly away from the interior surface of said window, said pivot members being spaced apart by a distance less than the unstressed length of said body so as to resiliently press said body against said window between said pivot members, bearing means for rotatably supporting each said pivot member so as to extend through the mask, at least one of said pivot members having a handle portion on the exterior of said mask for access to permit rotation of said pivot member from the exterior of the mask, said wiper body being supported at each of its ends resiliently by respective ones of said pivot members at the ends of said pivots which are spaced inwardly from said window and holding said wiper body in a position biasing it into engagement with the window during rotation thereof.

Claim 12

A windshield wiper for a respiratory mask window, comprising a partially cylindrical viewing window curved over its entire area, an elongated resilient wiper body engaged on the curved surface of said window, a rotatable pivot member connected to each end of said wiper body and projecting inwardly away from the interior surface of said window, said pivot members being spaced apart by a distance less than the unstressed length of said body so as to resiliently press said body against said window between said pivot members, bearing means for rotatably supporting each said pivot member so as to extend through the mask, at least one of said pivot members having a handle portion on the exterior of said mask for access to permit rotation of said pivot member from the exterior of the mask, said wiper body being supported at each of its ends resiliently by respective ones of said pivot members at the ends of said pivots which are spaced inwardly from said window and holding said wiper body in a position biasing it into engagement with the window during rotation thereof.

Claim 13

A windshield wiper, according to claim 10, wherein said wiper body comprises an elastic support in the form of a coil spring covered by a wiping material.