| 摘要 |
#CMT# #/CMT# The connecting unit has a screw (V) with a threaded zone (ZF1) provided with grooves (R) oriented longitudinally at an axis (X) of the screw. The grooves have depth, which is equal to depth of a thread (F) of the screws in the zone, and average width of the groove is between 1 to 2 mm. The screw has a support collar (C) arranged between the zone (ZF1) and a threaded zone (ZF2). #CMT# : #/CMT# An independent claim is also included for a method for obtaining a screw. #CMT#USE : #/CMT# Connecting unit for connecting a lighting unit and a signaling unit of a motor vehicle e.g. car (from drawings), in a lighting or signaling device e.g. vehicle lamp (claimed). #CMT#ADVANTAGE : #/CMT# The screw creates a significant improvement for ventilation of fire and for ensuring air circulation towards sealed or dry zone of a vehicle, thus permitting to gain 25 percentages in decondensation time. The connecting unit is easy and simple to fabricate and implement, while being adaptable to all types of fire. The presence of the groove not affects the mechanical resistance of the screw and screwing torque during fire. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a detailed view of a screw of a lighting and signaling device. C : Support collar F : Thread R : Grooves V : Screw X : Axis ZF1, ZF2 : Threaded zones. |
