Patent · US Active

Spring device at a swivelable hatch of a motor vehicle

US8474568B2 · kind B2 · utility

0Cited by

10References

13Claims

0Family size

Assignee

Stabilus GmbH · DE

Inventors

Ulrich Koestler · Hebertshausen, DE
Arne KOEHLER · Pliening, DE
Christoph Ulrich · Kratzenburg, DE
Nadja Kaiser · Koblenz, DE

Key dates

Filing date	Jun 8, 2011
Grant date	Jul 2, 2013
Priority date	—
Expiry date	Sep 30, 2031

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16F9/0218
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A spring device at a swivelable hatch of a motor vehicle, having a gas spring and a helper spring between the body of the motor vehicle and the hatch. The hatch is a front hood which can be raised into a pedestrian protection position prior to an impact of a pedestrian on the front hood, by an actuator activated by a sensor device. The helper spring is preloaded with a preloading force which, in case of a malfunction in which the gas spring has no gas pressure or a reduced gas pressure, is sufficient to adjust the front hood into the raised pedestrian protection position and to hold the front hood in the raised pedestrian protection position prior to the impact.

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