US4473072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ready use respirator
Assignee: Draegerwerk AG and Co KGaA
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Filing: 1982-12-09
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Granted: 1984-09-25
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Expires: 2002-12-09
Abstract
Abstract A respirator package comprises a half mask adapted to be worn over a wearer's nose and mouth and having a breathing opening with a filter positioned in the opening and a packing bag enclosing the filter and extending through the half mask having an end portion extending beyond each side of the mask which is closed but has a cut in marking forming a tear-off adjacent each end with a grasping element located adjacent the marking for tearing open the bag. The elements are connected to parts of a folded hood so that unfolding the hood tears the tear-offs.
Inventors
- 👤 Hans-Joachim Walther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:08
CPC Classifications
A; A62; A62B; A62B17/00; A62B17/04; A62B23/00; A62B23/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
238 words
A respirator comprising: a half mask adapted to be worn over a wearer's nose and mouth, said half mask having a breathing opening therethrough; a filter disposed in said breathing opening; a packing bag enclosing said filter engaged around said filter in said breathing opening, said bag having a first sealed end portion extending from one side of said opening and said mask and a second sealed end portion extending from an opposite side of said breathing opening and mask, said bag including first tear means between said first sealing end portion and said filter and second tear means between said second sealing end portion and said filter, said first and second tear means comprising areas where said packing bag can be readily torn open; a hood connected to said mask having an upper portion lying near said filter in a folded position of said hood and a collar portion lying near said filter in a turned in position of said hood, said hood being movable into an unfolded position with said upper portion and said collar disposed away from said filter; first attachment means connecting said upper portion of said hood in its folded position to said first sealed end portion; and second attachment means connecting said collar of hood to said second sealed end portion whereby movement of said folded hood into its unfolded position tears said first and second tear means to expose said filter.
Claim 2
Dependent Claim
238 words
A respirator comprising: a half mask adapted to be worn over a wearer's nose and mouth, said half mask having a breathing opening therethrough; a filter disposed in said breathing opening; a packing bag enclosing said filter engaged around said filter in said breathing opening, said bag having a first sealed end portion extending from one side of said opening and said mask and a second sealed end portion extending from an opposite side of said breathing opening and mask, said bag including first tear means between said first sealing end portion and said filter and second tear means between said second sealing end portion and said filter, said first and second tear means comprising areas where said packing bag can be readily torn open; a hood connected to said mask having an upper portion lying near said filter in a folded position of said hood and a collar portion lying near said filter in a turned in position of said hood, said hood being movable into an unfolded position with said upper portion and said collar disposed away from said filter; first attachment means connecting said upper portion of said hood in its folded position to said first sealed end portion; and second attachment means connecting said collar of hood to said second sealed end portion whereby movement of said folded hood into its unfolded position tears said first and second tear means to expose said filter.
Claim 3
Dependent Claim
26 words
A respirator according to claim 1, wherein said first and second tear means each comprise a cut-in marking and a tear-off line in said packing bag.
Claim 4
Dependent Claim
30 words
A respirator according to claim 2, including clamp means engaged around said mask over said breathing opening and over said enclosed filter for holding said filter in said breathing opening.
Claim 5
Dependent Claim
25 words
A respirator according to claim 3, wherein said clamping means is engaged around a portion of said hood for holding said hood to said mask.
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) | 1987-09-25 | 1988-03-26 | 1988-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-25 | 1992-03-26 | 1992-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-25 | 1996-03-26 | 1996-09-25 | $7700.00 | Window Closed / Lapsed |