Patent US3740451A successfully refreshed from Google Patents.
← Back to Patent Explorer
US3740451A Expired / Lapsed US ⏱️ 0.0 years remaining

Molded electrical junction box

Assignee: Nelco Corp
•
Filing: 1972-06-22
•
Granted: 1973-06-19
•
Expires: 1992-06-22
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract An electrical junction box characterized by the provision of knockouts provided in the walls of the outlet box which are accessible from the interior of the box for easy removal. The junction box, which is constructed of an injection moldable resinous material having insulating properties, is provided with tapered ribs on the exterior surface of the side walls to properly orient the box with respect to the wall yet provide sufficient draft angle to enable injection molding. Additional volume on the interior of the electrical outlet box is provided by a lateral extension of the box constructed and arranged to fit within the wall structure. Grounding means for use with the boxes is provided wherever necessary.

Inventors

  • 👤 E Schindler
  • 👤 Eachron J Mc

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 17:49
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/02; H02G3/08; H02G3/081; H02G3/083; H02G3/085

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 122 words
An electrical junction box having a wall structure defining a plurality of front-to-rear walls which terminate in a common frontal plane of the box and are interconnected with one another to define a chamber within the box that opens to the ambient surroundings of the box through the frontal plane thereof, a pair of which front-to-rear walls are oppositely disposed to one another and taper relatively toward one another in the direction relatively rearwardly away from the frontal plane of the box, and have corresponding laterally outstanding ribs thereon which extend in the front-to-rear direction of the box and define a pair of flat surfaces thereon that are disposed in spaced parallel planes extending perpendicular to the frontal plane of the box.
Claim 2
Dependent Claim 122 words
An electrical junction box having a wall structure defining a plurality of front-to-rear walls which terminate in a common frontal plane of the box and are interconnected with one another to define a chamber within the box that opens to the ambient surroundings of the box through the frontal plane thereof, a pair of which front-to-rear walls are oppositely disposed to one another and taper relatively toward one another in the direction relatively rearwardly away from the frontal plane of the box, and have corresponding laterally outstanding ribs thereon which extend in the front-to-rear direction of the box and define a pair of flat surfaces thereon that are disposed in spaced parallel planes extending perpendicular to the frontal plane of the box.
Claim 3
Dependent Claim 27 words
An electrical junction box according to claim 2 wherein there is a pair of spaced ribs on each of the oppositely disposed front-to-rear walls of the structure.

References Cited (Backward Citations)

US3176869A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-06-18 1976-12-18 1977-06-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-06-18 1980-12-18 1981-06-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-06-18 1984-12-18 1985-06-19 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag