US4565196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable smoke mask and apparatus
Assignee: MELCO CO Inc
•
Filing: 1984-11-05
•
Granted: 1986-01-21
•
Expires: 2004-11-05
Abstract
Abstract A disposable smoke mask and apparatus comprising breathable gas or air contained under pressure in the canister and connected by a hose to the mask, and wherein breathable gas contained in the canister is released to the hose by means of a valve actuated by removal of a snap ring section to allow a spring under compression to actuate a plunger unit tube, to allow breathable gas to flow through a suitable orifice into the plunger unit tube and through another orifice in the top of the plunger unit tube, and the hose and into the mask.
Inventors
- 👤 Phillip J. Melby
- 👤 James J. Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:17
CPC Classifications
A; A62; A62B; A62B18/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
192 words
Disposable smoke mask and apparatus comprising a smoke mask and canister of breathable gas wherein the improvement comprises: a. a canister of breathable gas including an inner chamber; b. plunger unit tube mounted in said canister; c. said plunger unit tube held in position to seal said breathable gas in said canister, by means of a compressed spring and a snap ring fitting in a groove in said plunger unit tube; d. seal ring rigidly fastened in a gas tight manner on said plunger unit tube; e. lock ring fastened in a gas tight manner to said canister inner chamber, and wherein the inside diameter of said ring is sloped downward; f. locking collar fastened in a gas tight manner to said plunger unit tube; g. an aperture leading from said inner chamber; h. an aperture in plunger unit tube located between said seal ring and said locking collar; i. an aperture in top of plunger unit tube; j. a hose end connected to said aperture in top of said plunger unit tube; k. opposite end of said hose connected to said face mask; l. said face mask including an elastic band.
Claim 2
Dependent Claim
192 words
Disposable smoke mask and apparatus comprising a smoke mask and canister of breathable gas wherein the improvement comprises: a. a canister of breathable gas including an inner chamber; b. plunger unit tube mounted in said canister; c. said plunger unit tube held in position to seal said breathable gas in said canister, by means of a compressed spring and a snap ring fitting in a groove in said plunger unit tube; d. seal ring rigidly fastened in a gas tight manner on said plunger unit tube; e. lock ring fastened in a gas tight manner to said canister inner chamber, and wherein the inside diameter of said ring is sloped downward; f. locking collar fastened in a gas tight manner to said plunger unit tube; g. an aperture leading from said inner chamber; h. an aperture in plunger unit tube located between said seal ring and said locking collar; i. an aperture in top of plunger unit tube; j. a hose end connected to said aperture in top of said plunger unit tube; k. opposite end of said hose connected to said face mask; l. said face mask including an elastic band.
References Cited (Backward Citations)
US2860634A
Cited
US3316907A
Cited
US4098271A
Cited
US4090509A
Cited
US4271833A
Cited
US4365628A
Cited
US4423723A
Cited
US4373522A
Cited
US4440163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |