Patent US3564990A successfully refreshed from Google Patents.
US3564990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laboratory equipment having a collapsible canopy
Assignee: EH Sheldon and Co
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Filing: 1969-03-19
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Granted: 1971-02-23
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Expires: 1989-03-19
Abstract
Abstract Laboratory equipment wherein an exhaust duct is equipped with at least one port, the port being selectively shrouded by a collapsible canopy where the wings and top are hingedly connected together and upon lifting of the top, the wings unfold into place.
Inventors
- 👤 Peter Smedes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:53
CPC Classifications
B; B01; B01L; B01L9/00; B01L9/02; B08; B08B; B08B15/00; B08B15/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
119 words
Laboratory equipment comprising an exhaust duct having a generally planar surface, exhaust port means in said surface, and a collapsible hood for said port means, said hood including a top plate hingedly interconnected to said duct above said port means, and a pair of wings of rectangular shape hingedly interconnected along one of their sides to the outer ends of said top plate and having inner side edges adjacent said duct planar surface whereby lifting said plate from a storage position generally parallel to said surface to an operational position normal to said surface effects a pivoting of said wings to a position abutting said duct planar surface to define and maintain a three-sided canopy for said port means.
Claim 2
Dependent Claim
119 words
Laboratory equipment comprising an exhaust duct having a generally planar surface, exhaust port means in said surface, and a collapsible hood for said port means, said hood including a top plate hingedly interconnected to said duct above said port means, and a pair of wings of rectangular shape hingedly interconnected along one of their sides to the outer ends of said top plate and having inner side edges adjacent said duct planar surface whereby lifting said plate from a storage position generally parallel to said surface to an operational position normal to said surface effects a pivoting of said wings to a position abutting said duct planar surface to define and maintain a three-sided canopy for said port means.
Claim 3
Dependent Claim
38 words
The structure of claim 1 in which said top plate is equipped with flange means adjacent the hinge connection thereto of said wings whereby said wings are confined to about 90* pivotal movement relative to said top plate.
Claim 4
Dependent Claim
53 words
The structure of claim 1 in which said top plate is generally rectangular with the hinge connection to said duct being along one side, the other side of said plate being equipped with an integral flange adapted to bear against said duct below said port means when said hood is in storage position.
References Cited (Backward Citations)
US2087833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |