Head guard assembly comprising a protective helmet and a protective breathing mask

• US 4,136,403 A
• Filed: 09/07/1977
• Issued: 01/30/1979
• Est. Priority Date: 09/10/1976
• Status: Expired due to Term

• Current Assignee: Dragerwerk AG
• Original Assignee: Dragerwerk AG
• Inventors: Gdulla, Manfred, Walther, Hans J.
• Primary Examiner(s): Nerbun, Peter
• Application Number:
  US05/831,133
• Time in Patent Office: 510 Days
• Field of Search: 2/10, 2/6, 2/424, 403/328, 128/142.7, 128/142.4, 128/146.7
• US Class Current: 2/10
• CPC Class Codes: A42B 3/288 with means for attaching respirators or breathing masks
• CPC Class Codes: A62B 18/084 Means for fastening gas-masks to heads or helmets

Abstract

A head guard assembly comprises a protective head helmet, with a face protective breathing mask coupled to the helmet by interengagement of a coupling pin carried on each side of the face mask with a socket member carried on each side of the protective helmet. The socket member includes a bore which is tapered outwardly in a funnel-shape and is of oval configuration so as to conform close to the inside of the helmet side flaps. It has an interior widened portion in the bore forming catch grooves which are engaged by ball members which are carried in the recess of the coupling member and are biased by a spring into outward engagement with the catch groove when the coupling pin is inserted. The coupling pin includes an uncoupling member which moves against the balls to cause them to be pressed into the recess of the member to permit withdrawal of the mask from the helmet. The socket member is mounted on the helmet by means of a slide which may be slid in directions toward and away from the coupling pin and locked in an adjusted position in order to regulate the interfitting of the mask with the helmet.

Claims

1. A head guard assembly, comprising a protective head helmet, a face protective breathing mask, and coupling means carried on each respective side of said helmet and said mask for detachably interengaging said helmet and said mask and including a socket-forming member on one of said helmet and mask and a coupling pin on the other of said helmet and mask, said socket-forming member having an oval outwardly tapered receiving socket bore with an internal widened portion defining a catch groove therein, said coupling pin having a necked-down portion, at least one engagement member in said necked-down portion movable radially outwardly into engagement with said catch groove, spring means biasing said engagement member outwardly but permitting inward movement thereof, and means mounting said socket-forming member for displacement on its associated helmet and face mask in directions toward and away from said coupling pin to adjust said breathing mask relative to said helmet, wherein said means mounting said socket-forming member comprises a slide movable on said helmet, a set screw threadedly engaged in said slide and bearing against said socket-forming member to adjust said socket-forming member relative to said slide and to the interior of said helmet.

2. A head guard assembly, comprising a protective head helmet, a face protective breathing mask, and coupling means carried on each respective side of said helmet and said mask for detachably interengaging said helmet and said mask and including a socket-forming member on one of said helmet and mask and a coupling pin on the other of said helmet and mask, said socket-forming member having an oval outwardly tapered receiving socket bore with an internal widened portion defining a catch groove therein, said coupling pin having a necked-down portion, at least one engagement member in said necked-down portion movable radially outwardly into engagement with said catch groove, spring means biasing said engagement member outwardly but permitting inward movement thereof, and means mounting said socket-forming member for displacement on its associated helmet and face mask in directions toward and away from said coupling pin to adjust said breathing mask relative to said helmet, said mounting means including a slide member slidable on said helmet and means for locking said slide in an adjusted position after movement of said slide in a direction away from said coupling pin, said slide including a recess therein, a ball in said recess, means urging said ball in a direction away from said coupling pin, the wall bounding one side of said recess being tapered to a widened portion in a direction toward said coupling pin and a wall surface defined by said helmet adjacent said slide engageable with said ball and locking said ball against said portion of said helmet together with said slide and said socket-forming member in an adjusted position.

3. A head guard assembly, according to claim 2, wherein said socket-forming member is made of a resilient material.

4. A head guard assembly, according to claim 2, including a leaf spring connected between said slide and said socket-forming member.

5. A head guard assembly, comprising a protective head helmet, a face protective breathing mask, and coupling means carried on each respective side of said helmet and said mask for detachably interengaging said helmet and said mask and including a socket-forming member on one of said helmet and mask and a coupling pin on the other of said helmet and mask, said socket-forming member having an oval outwardly tapered receiving socket bore with an internal widened portion defining a catch groove therein, said coupling pin having a necked-down portion, at least one engagement member in said necked-down portion movable radially outwardly into engagement with said catch groove, a sleeve slidable along said coupling pin to engage over said engagement member and retain it in said necked-down portion, biasing means between said sleeve and said coupling pin to urge said sleeve over said engagement member, said coupling member including a head portion of a diameter greater than said necked-down portion displaceable toward said engagement member when said coupling pin is positioned within said socket-forming member and said sleeve being displaceable against the bias of said biasing means and away from said engagement member when said coupling pin is engaged within said socket forming member so that said head portion of said coupling pin urges said engagement member radially outwardly into engagement with said catch groove through the action of said biasing means whereby said coupling pin may be displaced against the bias of said biasing means to position said necked-down portion adjacent said engagement member to permit the radially inwardly displacement of said engagement member out of engagement with said catch groove and the withdrawal of said coupling pin from said socket-forming member.

6. A head guard assembly, according to claim 5, wherein said mounting means for said socket-forming member includes a slide movable backwardly and forwardly on each side of said helmet, said face mask having an angle member on each side, said coupling pin being mounted on respective angle members.