US4536823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric panel board having an improved extruded base pan configuration
Assignee: Siemens Energy and Automation Inc
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Filing: 1981-10-27
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Granted: 1985-08-20
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Expires: 2001-10-27
Abstract
Abstract An improved panel board construction is described, including an extruded insulative base pan which slidably engages at least one main-line bus bar and a neutral connector element and which has a plurality of electrical contact points. The base pan also prevents current flow through the base pan between any two of the contact points of the main-line bus bars. A protrusion extending from the base pan having a tortuously formed surface thereon prevents current flow through the base pan. The panel board is provided with interchangeable main-line lugs which may be used to directly contact the main-line bus bars or, alternatively, support a main-line circuit breaker between the lugs and the main-line bus bars. The base pan is symmetrically formed by an extrusion process so that it may be adaptable for use with a variety of panel board sizes simply by shearing the base pan to form the appropriate length.
Inventors
- 👤 Wayne A. Ingram
- 👤 Stephen L. Johnson
- 👤 Thomas E. Coleman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:58
CPC Classifications
H; H02; H02B; H02B1/00; H02B1/015; H02B1/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
119 words
An insulative base pan for a circuit breaker panelboard comprising: a centrally disposed rail extending the length of said pan, said rail having an inverted-T opening throughout the length thereof, said rail including a pair of outer lips extending the length thereof for slidably engaging respective bus bars; a first pair of channels extending the length of said base pan, each channel being disposed in a parallel relationship on either side of said rail for slidably receiving a pair of main-line lugs; and a second pair of channels extending the length of said base pan, each channel being disposed parallel to said rail and along the outer edge of said base pan for slidably receiving elongated neutral elements thereon.
Claim 2
Dependent Claim
119 words
An insulative base pan for a circuit breaker panelboard comprising: a centrally disposed rail extending the length of said pan, said rail having an inverted-T opening throughout the length thereof, said rail including a pair of outer lips extending the length thereof for slidably engaging respective bus bars; a first pair of channels extending the length of said base pan, each channel being disposed in a parallel relationship on either side of said rail for slidably receiving a pair of main-line lugs; and a second pair of channels extending the length of said base pan, each channel being disposed parallel to said rail and along the outer edge of said base pan for slidably receiving elongated neutral elements thereon.
Claim 3
Dependent Claim
40 words
An insulative base pan as recited in claim 1, wherein said base pan is symmetrically formed so that it is reversibly operative to engage said bus bars when said base pan is rotated 180° with respect to said bus bars.
Claim 4
Dependent Claim
42 words
A base pan as recited in claim 1, including a pair of outwardly extending double hook formations, each formation being disposed along said base pan parallel to said rail and said channels for mounting a neutral end of a circuit breaker thereupon.
Claim 5
Dependent Claim
20 words
A base pan as recited in claim 1, wherein said outer lips of the rail slidably engage a line shield.
Claim 6
Dependent Claim
34 words
A base pan as recited in claim 1, wherein said inverted-T opening increases resistance to current flow across said base pan between contact points of said bus bars by increasing the surface leakage path.
Claim 7
Dependent Claim
19 words
A base pan as recited in claim 4, wherein said base pan is symmetrically formed by an extrusion proccess.
Claim 8
Dependent Claim
26 words
A base pan as recited in claim 1, further comprising means integral with said base pan for interchangeably engaging a pair of mirror image main-line lugs.
Claim 9
Dependent Claim
20 words
A base pan as recited in claim 1, further comprising a plurality of square orifices for alignment with a box.
Claim 10
Dependent Claim
155 words
A symmetrically formed insulative base pan for a circuit breaker panel board comprising: a centrally disposed rail extending the length of said pan, said rail having an inverted-T opening throughout the length thereof, said rail including a pair of outer lips extending the length thereof for slidably engaging respective bus bars; a first pair of channels extending the length of said base pan, each channel being disposed in a parallel relationship on either side of said rail for slidably receiving a pair of main-line lugs; a pair of outwardly extending double hook formations, each formation being disposed along said base pan parallel to said rail and said channels for mounting a neutral end of a circuit breaker thereupon; and a second pair of channels extending the length of said base pan, each channel being disposed parallel to said rail and along the outer edge of said base pan for slidably receiving elongated neutral elements thereon.
Claim 11
Dependent Claim
155 words
A symmetrically formed insulative base pan for a circuit breaker panel board comprising: a centrally disposed rail extending the length of said pan, said rail having an inverted-T opening throughout the length thereof, said rail including a pair of outer lips extending the length thereof for slidably engaging respective bus bars; a first pair of channels extending the length of said base pan, each channel being disposed in a parallel relationship on either side of said rail for slidably receiving a pair of main-line lugs; a pair of outwardly extending double hook formations, each formation being disposed along said base pan parallel to said rail and said channels for mounting a neutral end of a circuit breaker thereupon; and a second pair of channels extending the length of said base pan, each channel being disposed parallel to said rail and along the outer edge of said base pan for slidably receiving elongated neutral elements thereon.
Claim 12
Dependent Claim
58 words
A base pan as set forth in claim 1, including: a pair of mirror image bus bars slidably engaged in said base pan, each bus bar having a load contact portion extending therefrom in the direction of slidable engagement; and a pair of mirror image main-line lugs, each of said lugs including means for slidably engaging said pan.
Claim 13
Dependent Claim
54 words
A base pan as set forth in claim 11, wherein the pair of mirror image main-line lugs slidably engage the base pan in an engagement format having a threaded passageway in each main-line lug disposed in a direction toward the outside of the base pan, said lugs directly contacting a pair of bus bars.
Claim 14
Dependent Claim
69 words
A base pan as set forth in claim 10, wherein the pair of mirror image main-line lugs slidably engage the base pan in an engagement format having a threaded passageway in each main-line lug disposed in a direction toward the inside of the base pan, said engagement format having a main-load circuit breaker mounted directly upon said lugs, and disposed between said lugs and a pair of bus bars.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-19 | 1989-02-18 | 1989-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-19 | 1993-02-18 | 1993-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-19 | 1997-02-18 | 1997-08-20 | $7700.00 | Window Closed / Lapsed |