US4388681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hazardous location light fixture
Assignee: KCS LIGHTING Inc A CORP OF
•
Filing: 1980-12-15
•
Granted: 1983-06-14
•
Expires: 2000-12-15
Abstract
Abstract An explosion-resistant fixture is provided comprising a ballast compartment and lamp compartment. The ballast compartment contains the usual electrical components for the fixture and all voids within the compartment are filled with a non-flammable material thereby preventing explosive gases or volatile liquids from entering the compartment. The filling material is preferably an expanded closed cell foam material.
Inventors
- 👤 E. Robert Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:33
CPC Classifications
F; F21; F21V; F21V25/00; F21V25/12; F21V23/00; F21V23/02; F21V31/00; F21V31/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
37 words
An explosion-resistant fixture comprising: a ballast compartment containing therein the electrical components for the fixture; a lamp housing containing a lamp socket mounted to said ballast compartment; and filling means filling all voids in said ballast compartment.
Claim 2
Dependent Claim
37 words
An explosion-resistant fixture comprising: a ballast compartment containing therein the electrical components for the fixture; a lamp housing containing a lamp socket mounted to said ballast compartment; and filling means filling all voids in said ballast compartment.
Claim 3
Dependent Claim
21 words
The fixture in accordance with claim 1 further comprising closure means closing said ballast compartment and containing said filling means therein.
Claim 4
Dependent Claim
18 words
The fixture in accordance with claim 1 wherein said filling means comprises an expanded closed cell foam material.
Claim 5
Dependent Claim
48 words
The fixture in accordance with claims 1, 2 or 3 wherein said ballast compartment includes an open-bottomed end, a plate carrying said lamp socket closing said bottom end, said plate having first means for sealingly engaging said ballast compartment and second means for sealingly engaging said lamp housing.
References Cited (Backward Citations)
US2777942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-13 | 1986-12-13 | 1987-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-13 | 1990-12-13 | 1991-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-13 | 1994-12-13 | 1995-06-14 | $7700.00 | Window Closed / Lapsed |