Winding – tensioning – or guiding – Reeling device – With spring motor
Reexamination Certificate
1999-08-06
2001-04-10
Jillions, John M. (Department: 3653)
Winding, tensioning, or guiding
Reeling device
With spring motor
C242S384500
Reexamination Certificate
active
06213420
ABSTRACT:
The invention relates to a safety belt apparatus with an acceleration sensor.
BACKGROUND OF THE INVENTION
A safety belt apparatus of this kind is known for example from GB 2 131 279. Its principle is based on the fact that an acceleration sensor which is equipped with a sphere as a movable mass has a pawl which is pivotal about a transverse axis and which engages into a tooth at the periphery of a position control ratchet wheel in horizontal movements of the sphere as a result of accelerations or decelerations, through which the position control ratchet wheel, which is connected in a rotationally fixed manner via a transmission to the belt roller, is abruptly braked. Since the belt is drawn further out, the transmission, which is provided between the position control ratchet wheel and the main pawl, experiences a moving out of the main pawl in order that the latter engages into the main ratchet crown and thus stops the drawing out movement of the belt.
A problem in acceleration sensors operating in this manner consists in that the movable mass moves back and forth in the free space surrounding it as a result of the vibrations during normal travel, with the auxiliary pawl also being continually pivoted back and forth. In this it strikes again and again at the outer periphery of the position control ratchet wheel, which leads to disagreeable rattling noises.
SUMMARY OF THE INVENTION
The object of the invention consists in providing a safety belt apparatus of the initially named kind in which rattling noises of the acceleration sensor and of the parts connected to it during normal travel are largely forestalled.
The idea of the invention is thus to be seen in providing the pawl at a spring element which damps thrusts which arise during the striking against the position control ratchet wheel to such an extent that the development of rattling noise is at least greatly reduced.
Advantageous further developments are characterised by the path limiting means between the limbs receiving an especial significance.
REFERENCES:
patent: 4168810 (1979-09-01), Sack et al.
patent: 4190213 (1980-02-01), Ueda
patent: 4453681 (1984-06-01), Gueguen et al.
patent: 4483495 (1984-11-01), Honl
patent: 4760975 (1988-08-01), Doty
patent: 4979695 (1990-12-01), Matsuki et al.
patent: 5443224 (1995-08-01), Patterson et al.
patent: 24 02 921 (1975-08-01), None
patent: 80 09 960 (1980-08-01), None
patent: 34 31 911 (1986-05-01), None
patent: 2 131 279 (1984-06-01), None
patent: 87/06545 (1987-11-01), None
Foley & Lardner
Jillions John M.
Takata (Europe) Vehicle Safety Technology GmbH
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