Patent US2286909A successfully refreshed from Google Patents.
Patent US5216948A successfully refreshed from Google Patents.
US5216948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Environment control chamber with safety switch
Assignee: Individual
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Filing: 1989-11-24
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Granted: 1993-06-08
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Expires: 2009-11-24
Abstract
Abstract A collapsible environmental chamber in which bread dough may be placed during rising, the chamber including umbrella-like ribs between which fabric panels are positioned, each fabric panel having a skirt depending beneath the straight line between adjacent leg ends whereby the chamber in its expanded condition will have a skirt portion lying loosely adjacent a supporting surface to prevent drafts from entering the interior of the chamber during the bread rising process.
Inventors
- 👤 Michael E. Sheppard
- 👤 Thomas M. Sheppard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:41
CPC Classifications
A; A21; A21D; A21D8/00; A21D8/02; A21D8/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
An environmental chamber comprising: three collapsible ribs moveable between a stable expanded position and a stable collapsed position, each of said ribs extending from a common restrained convergence region to an unrestrained supporting end with all of said supporting ends lying in substantially the same plane, flexible, foldable, substantially air-impermeable panels supported by said ribs and covering the area between said ribs whereby an enclosed chamber is formed by said flexible panels when said ribs are in extended position and on a supporting surface, each of said panels between two adjacent ribs having a skirt extending beyond the straight line between the supporting ends of said two adjacent ribs, whereby said skirt lies loosely on a surface on which said supporting ends of said ribs are supported, an electrically-operated heat source within said chamber, a switch to actuate said heat source, said switch associated with a collapsible rib to hold said switch in open position when said rib is in collapsed position.
Claim 2
Dependent Claim
162 words
An environmental chamber comprising: three collapsible ribs moveable between a stable expanded position and a stable collapsed position, each of said ribs extending from a common restrained convergence region to an unrestrained supporting end with all of said supporting ends lying in substantially the same plane, flexible, foldable, substantially air-impermeable panels supported by said ribs and covering the area between said ribs whereby an enclosed chamber is formed by said flexible panels when said ribs are in extended position and on a supporting surface, each of said panels between two adjacent ribs having a skirt extending beyond the straight line between the supporting ends of said two adjacent ribs, whereby said skirt lies loosely on a surface on which said supporting ends of said ribs are supported, an electrically-operated heat source within said chamber, a switch to actuate said heat source, said switch associated with a collapsible rib to hold said switch in open position when said rib is in collapsed position.
References Cited (Backward Citations)
US2771087A
Cited
FR1155108A
Cited
US3361895A
Cited
US3418453A
Cited
US4210073A
Cited
US4565703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-06-07 | 1996-12-07 | 1997-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-07 | 2000-12-07 | 2001-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-07 | 2004-12-07 | 2005-06-08 | $7700.00 | Window Closed / Lapsed |