US4558466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vest for use in polluted atmosphere
Assignee: Individual
•
Filing: 1983-08-04
•
Granted: 1985-12-17
•
Expires: 2003-08-04
Abstract
Abstract The present invention relates to a vest for use in a polluted atmosphere. The vest is intended to create a fresh air zone outside the vest. To this end, the vest has an air-permeable portion extending around at least a part of the vest, preferably around the entire vest, and a supply air connection for supplying fresh air to the interior of the vest and out through said air-permeable portion.
Inventors
- 👤 Jan A. A. Kristensson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:59
CPC Classifications
A; A41; A41D; A41D13/00; A41D13/002; A41D13/0025; Y; Y10; Y10S; Y10S2/00; Y10S2/01
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
78 words
A vest for use in a polluted atmosphere, comprising: (a) an air-permeable portion located at the upper part of the vest; (b) an air-tight portion located in the lower part of the vest to form an air distribution zone; and (c) an air supply connection connected to the lower part of the vest for supplying fresh air to the air distribution zone and out throught said air-permeable portion, wherein a fresh air zone is formed outside the vest.
Claim 2
Dependent Claim
78 words
A vest for use in a polluted atmosphere, comprising: (a) an air-permeable portion located at the upper part of the vest; (b) an air-tight portion located in the lower part of the vest to form an air distribution zone; and (c) an air supply connection connected to the lower part of the vest for supplying fresh air to the air distribution zone and out throught said air-permeable portion, wherein a fresh air zone is formed outside the vest.
Claim 3
Dependent Claim
41 words
The vest as claimed in claim 1, further comprising: (a) an outer layer; and (b) an inner layer, wherein said outer layer includes the air-permeable portion and the air supply connection, and said inner layer has a low permeability to air.
Claim 4
Dependent Claim
32 words
The vest as claimed in claim 2, wherein the air-tight portion is arranged in the outer layer and the air distribution zone is formed between the inner layer and the air-tight portion.
Claim 5
Dependent Claim
26 words
The vest as claimed in claim 3, wherein the air supply connection comprises: means for controlling the air flow and the temperature of the fresh air.
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) | 1988-12-16 | 1989-06-17 | 1989-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-16 | 1993-06-17 | 1993-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-16 | 1997-06-17 | 1997-12-17 | $7700.00 | Window Closed / Lapsed |