Plastic PAR lamp construction with tapered reinforcement
US4344120A · kind A · utility
16Cited by
17References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1979 |
| Grant date | Aug 10, 1982 |
| Priority date | — |
| Expiry date | Jul 30, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21S41/19
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved plastic reflector member for a parabolic aluminized reflector (PAR) lamp is disclosed and, in particular, the use of said improved plastic reflector member for an all plastic lamp or a lamp which uses said improved reflector member. Said improved plastic reflector member utilizes a variable thickness wall member to form the parabolic shaped cavity wherein the wall thickness of its planar walls is sufficiently greater in the rim sealing region than in the adjoining wall region of said parabolic cavity to avoid mechanical and heat distortion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.