Hilton Joseph Raymond, Odell Raymond: Improvements in and relating to respirators.. Racal Safety, December 18, 1985: EP0164946-A2 (46 worldwide citation)

The present invention relates to a pump module (14) for a powered air purifying respirator assembly including a facepiece (1) and a filter canister (32). The pump module (14) comprises a housing (15) having an air inlet (16) and an air outlet (17) and containing a fan (22) and motor (24). The pump m ...

Improvements in and relating to respirators. Racal Safety, November 12, 1980: GB2046102-A (12 worldwide citation)

A respirator, and particularly to the type of respirator called a filtering face piece is made from a flat pocket of filtering material of generally frustoconical shape having an open edge 4 at the larger end of the frusto-cone and a closed end at the smaller end of the frusto-cone, and the closed e ...

Improvements in and relating to respirators. Edmund Koch, December 10, 1931: GB362573-A (1 worldwide citation)

362,573. Respirators. KOCH, E., 2, Lambertstrasse, Essen, Germany. Sept. 30, 1930, No. 29334. [Class 81 (ii).] In a closed cycle respiration apparatus having either an oxygen cylinder, o r a chemical c a r t - ridge developing oxygen, a cut-off device is p r o - vided for the respiration c i r - cui ...

Improvements in and relating to respirators.. Whitworth & Co, Harry Stafford Rayner, May 29, 1919: GB127124-A (1 worldwide citation)

127,124. Armstrong, Whitworth, & Co., Sir W. G., and Rayner, H. S. June 13, 1918. Respiratory appliances. - A flexible breast-piece 1 worn under the coat &c. is provided with a fairly rigid upstanding collar 2 carrying a slotted pipe 6 to which air or oxygen is supplied. A flexible sleeve 3 is secur ...

DIGHT CHARLES FREMONT: [en] Improvements in and relating to Respirators.. DIGHT CHARLES FREMONT, July 23, 1898: GB189809584-A

[en] 9584. Dight, C. F. April 26. Drawings to Specification. Hats fitted with respirators.-The nose-cap of a respirator is connected by a tube with a heatretaining chamber supported in hat by an arched strip attached to a flexible band held by the sweatband,

BROOKES ALFRED GEORGE: [en] Improvements in and relating to Respirators and the like. BROOKES ALFRED GEORGE, July 27, 1905: GB190500838-A

[en] 838. Brookes, A. G., [Craig, D.]. Jan. 16. Washers.-Air washers of the liquid - seal or bubble type, for use with respirators, consist of an outer casing 1, Figs. 4 and 5, provided with an air inlet 2 and an outlet 3. Within the casing is arranged a receptacle 4 provided with trunnions 5 and 6, ...