Patent US3681663A successfully refreshed from Google Patents.
US3681663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Backless electrical control panel box
Assignee: Brasch Mfg Co Inc
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Filing: 1970-10-05
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Granted: 1972-08-01
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Expires: 1990-10-05
Abstract
Abstract A electrical control panel enclosure or box characterized by the absence of a back. Instead of being used as the conventional subpanel, the control panel, when attached, becomes the back panel of the control box. In making the attachment, an air space is maintained between the control box sides and the control panel so that air can enter the control box to reduce its ambient operating temperature. To maintain the strength of the backless control box, its sides are of channel construction. The control box is useful as a general electrical control box as well as in conjunction with electrical resistance duct heaters.
Inventors
- 👤 Rolf G Albers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 01:52
CPC Classifications
H; H02; H02B; H02B1/00; H02B1/26; H02B1/28; H02B1/40
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
95 words
An eleCtrical control panel box for dissipating heat created therein to reduce the ambient temperature of said box and for preventing hot metals or other hazardous materials from being thrown out of said box upon overheating, said box having channel sides, a door and a control panel forming the back thereof, said control panel being operatively attached to and spaced from said channel sides forming therebetween devious air space for allowing air to circulate through said box without the need of any air openings in and through any of said sides, door and control panel.
Claim 2
Dependent Claim
95 words
An eleCtrical control panel box for dissipating heat created therein to reduce the ambient temperature of said box and for preventing hot metals or other hazardous materials from being thrown out of said box upon overheating, said box having channel sides, a door and a control panel forming the back thereof, said control panel being operatively attached to and spaced from said channel sides forming therebetween devious air space for allowing air to circulate through said box without the need of any air openings in and through any of said sides, door and control panel.
Claim 3
Dependent Claim
37 words
The electrical control panel box of claim 1 wherein said control panel is inserted within said channel sides to form the back thereof, whereby said air space is formed between said control panel and said channel sides.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |