US4390997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat protection garment
Assignee: Draegerwerk AG and Co KGaA
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Filing: 1981-01-16
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Granted: 1983-07-05
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Expires: 2001-01-16
Abstract
Abstract A heat protection garment comprises one or more manifolds connected to one or more headers by a plurality of parallel extending coolant tubes. The manifolds and headers are similar and both include mixing chambers to which the coolant tubes are connected. Coolant supply and discharge conduits are connected to the manifolds and headers respectively with connecting pieces extending across the mixing chambers between the coolant tubes and the conduits, in a plurality of rows. The ratio between the spacing of the parallel rows to the length of each of the connecting pieces to the distance between each of the connecting pieces in each of the rows is approximately smaller or equal to 1:3:1 and the number of coolant tubes to the number of rows of connecting pieces to the number of conduits connected to each mixing chamber is smaller than or equal to about 12:3:1.
Inventors
- 👤 Claus-Dieter Hinz
- 👤 Adalbert Pasternack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:02
CPC Classifications
A; A62; A62B; A62B17/00; A62B17/005; A41; A41D; A41D13/00; A41D13/002; A41D13/005; A41D13/0053
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
223 words
A heat protection garment comprising: at least one manifold having opposite parallel end walls defining a mixing chamber; at least one header having opposite parallel end walls defining a mixing chamber; a plurality of coolant tubes connecting the manifold and header mixing chambers, the tubes connected to one end wall of each of the manifold and header; at least one coolant supply conduit connected to the manifold mixing chamber at a location spaced from the coolant tubes connected thereto; at least one coolant discharge conduit connected to the header mixing chamber at a location spaced from the coolant tubes connected thereto; and a plurality of parallel rows of connecting pieces extending across the manifold and header mixing chambers respectively, between the conduits and the coolant tubes and parallel to the end walls of the manifold and header respectively; the ratio, in each of the manifold and header of the number of coolant tubes to the number of parallel rows of connecting pieces to the number of coolant conduits being approximately equal to or smaller than 12:3:1; and the ratio in each of the manifold and header of the spacing between the parallel rows of connecting pieces to the length of each connecting piece in each row to the spacing between each connecting piece ineach row being approximately equal to or less than 1:3:1.
Claim 2
Dependent Claim
223 words
A heat protection garment comprising: at least one manifold having opposite parallel end walls defining a mixing chamber; at least one header having opposite parallel end walls defining a mixing chamber; a plurality of coolant tubes connecting the manifold and header mixing chambers, the tubes connected to one end wall of each of the manifold and header; at least one coolant supply conduit connected to the manifold mixing chamber at a location spaced from the coolant tubes connected thereto; at least one coolant discharge conduit connected to the header mixing chamber at a location spaced from the coolant tubes connected thereto; and a plurality of parallel rows of connecting pieces extending across the manifold and header mixing chambers respectively, between the conduits and the coolant tubes and parallel to the end walls of the manifold and header respectively; the ratio, in each of the manifold and header of the number of coolant tubes to the number of parallel rows of connecting pieces to the number of coolant conduits being approximately equal to or smaller than 12:3:1; and the ratio in each of the manifold and header of the spacing between the parallel rows of connecting pieces to the length of each connecting piece in each row to the spacing between each connecting piece ineach row being approximately equal to or less than 1:3:1.
Claim 3
Dependent Claim
42 words
A heat protection garment according to claim 1, wherein at least one coolant conduit for each mixing chamber is connected to the other of the opposite end walls for a flow of coolant parallel to the other of the opposite end walls.
Claim 4
Dependent Claim
25 words
A heat protection garment according to claim 2, wherein spaces between connecting pieces in each row are aligned with connecting pieces of an adjacent row.
Claim 5
Dependent Claim
26 words
A heat protection garment according to claim 1, wherein the at least one manifold is substantially the same in structure as the at least one header.
Claim 6
Dependent Claim
52 words
A heat protection garment according to claim 1, including connected arm, leg and body portions, at least one of the manifold and header positioned at an end of each of the leg and arm portions and the other of the manifold and header positioned at a central position of the body portion.
Claim 7
Dependent Claim
32 words
A heat protection garment according to claim 1, wherein the walls defining the mixing chambers of the manifold and header are made of flexible foils to which are welded the connecting pieces.
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) | 1986-07-04 | 1987-01-03 | 1987-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-04 | 1991-01-03 | 1991-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-04 | 1995-01-03 | 1995-07-05 | $7700.00 | Window Closed / Lapsed |