US4555815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective helmet with releasably connected protective breathing mask
Assignee: Draegerwerk AG and Co KGaA
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Filing: 1984-01-10
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Granted: 1985-12-03
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Expires: 2004-01-10
Abstract
Abstract In addition to protective helmets, a breathing protection is required time and again. This purpose is served by a protective breathing mask. It must be made possible to put the mask on in a simple way with one hand, but reliably and in combination with the protective helmet. To this end, the mask is provided with locking means comprising coupling hooks to be moved by means of spreading dogs. While pushing the dogs together, the coupling hooks are displaced outwardly, to spread apart at the end of this motion. Upon putting on the protective mask and releasing the hold of the spreading dogs, the hooks get clamped to the protective helmet where they engage catch seats to lock the mask to the helmet. The breathing mask is thus firmly held toward the face to be protected. The mask is removed in an equally simple way, by pushing the spreading dogs together.
Inventors
- 👤 Hans J. Walther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:30
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/28; A42B3/288; A62; A62B; A62B18/00; A62B18/08; A62B18/084
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
119 words
A protective helmet combined with a strapless protective breathing mask, comprising locking means associated with said helmet and mask including a mounting saddle having a tubular guide on said mask, a push rod slidable in said tubular guide, a coupling hook engageable with said push rod and with said helmet, biasing means biasing said push rod with said coupling hook in a direction to hold said coupling hook in a biased locking position to hold said mask and said helmet together, and a hand engageable dog connected to said push rod to move said push rod against said biasing means to permit disengagement of said coupling hook and also to permit engagement of said coupling hook with said helmet.
Claim 2
Dependent Claim
119 words
A protective helmet combined with a strapless protective breathing mask, comprising locking means associated with said helmet and mask including a mounting saddle having a tubular guide on said mask, a push rod slidable in said tubular guide, a coupling hook engageable with said push rod and with said helmet, biasing means biasing said push rod with said coupling hook in a direction to hold said coupling hook in a biased locking position to hold said mask and said helmet together, and a hand engageable dog connected to said push rod to move said push rod against said biasing means to permit disengagement of said coupling hook and also to permit engagement of said coupling hook with said helmet.
Claim 3
Dependent Claim
76 words
A protective helmet according to claim 1, wherein said mask includes said mounting saddle having said tubular guide and including a coupling hook on each side of said tubular guide and an associated push rod for each said coupling hook, said biasing means holding said push rods in a position in which said dogs associated with said push rods are in spread apart positions, said dogs being moved in directions toward and away from each other.
Claim 4
Dependent Claim
92 words
A protective helmet according to claim 2, wherein each said coupling hook includes members pivoted to said push rods, said biasing means including a spring connected between said mounting saddle and said coupling hook which is engageable with said helmet, said mounting saddle including an outwardly extending portion and said coupling hook including an oblique stop portion which is engageable with said outwardly extending portion, said spring holding said coupling hook in a position in which it extends obliquely outwardly away from the associated helmet when it is in a released position.
Claim 5
Dependent Claim
90 words
A protective helmet according to claim 1, wherein said mask includes a front viewing window, said mounting saddle comprising a portion extending below said front viewing window and said tubular guide comprising a tube extending around said mask below said front viewing window, said tube having slots carrying said dogs which are movable in said slots toward and away from each other, said push rod comprising a rod extending out of each end of said tubular guide and connected to a respective coupling hook on each side of said mask.
Claim 6
Dependent Claim
151 words
A helmet which is combinable with a mask including side portions on each side having a receiving recess, and a breathing mask engageable with said helmet having a front portion with a saddle extending therearound, a guide tube mounted on said saddle and having an opening on each side, a push rod extending from said guide tube out of the opening on each side, a coupling hook connected to the outer end of each push rod and having an outer end with a hook portion engageable in each receiving recess, spring means connected to each push rod and urging each push rod in respective opposite directions so as to cause each coupling hook to engage in each receiving recess of said helmet, and a dog engageable by hand connected to each guide tube and being movable along said guide tube for permitting released and locking biased engagement of said coupling hooks.
Claim 7
Dependent Claim
151 words
A helmet which is combinable with a mask including side portions on each side having a receiving recess, and a breathing mask engageable with said helmet having a front portion with a saddle extending therearound, a guide tube mounted on said saddle and having an opening on each side, a push rod extending from said guide tube out of the opening on each side, a coupling hook connected to the outer end of each push rod and having an outer end with a hook portion engageable in each receiving recess, spring means connected to each push rod and urging each push rod in respective opposite directions so as to cause each coupling hook to engage in each receiving recess of said helmet, and a dog engageable by hand connected to each guide tube and being movable along said guide tube for permitting released and locking biased engagement of said coupling hooks.
Claim 8
Dependent Claim
25 words
A helmet and mask according to claim 5, wherein each receiving recess includes indentations on each side thereof into which said coupling hooks are engaged.
Claim 9
Dependent Claim
19 words
A helmet according to claim 5, wherein said coupling hooks comprise a holding strap made of stiff elastic material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-02 | 1989-06-03 | 1989-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-02 | 1993-06-03 | 1993-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-02 | 1997-06-03 | 1997-12-03 | $7700.00 | Window Closed / Lapsed |