Patent · US Expired

Lamp which is closed on two sides

US7253562B2 · kind B2 · utility

2Cited by

7References

7Claims

0Family size

Assignee

Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE

Inventors

Jurgen Graf · Wels, AT
Andreas Hohlfeld · Berlin, DE
Michael Hulsemann · Delbrück, DE
Anton Schlögl · Meitingen, DE
Karen Twesten · Berlin, DE

Key dates

Filing date	May 28, 2004
Grant date	Aug 7, 2007
Priority date	—
Expiry date	Oct 6, 2025

Classification

Technology area (CPC H)Electricity
CPC primaryH01K1/42
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The elongate bulb (1) of the lamp, which defines a longitudinal axis (A), is closed at opposite ends by sealing parts (6; 32), with in each case one cap being fitted at one end, the cap having an electrical contact element (13; 25) which is connected in an electrically conductive manner to a supply conductor (15; 21) leading to a luminous means, the contact element being accommodated in a tubular extension (11; 22) of the sealing part; the contact element (13; 25) has an attachment part (14; 24) which is directed inward toward the lamp interior and is equipped with at least two barbs (20; 26) which are in contact with the tubular extension (11; 21).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.