| 摘要 |
The present invention provides a door opening assist device comprising a compression spring and piston retainably housed in a bind ended longitudinal bore formed in an externally threaded cylindrical housing. The spring and piston are held in cooperative engagement between a retaining nut and the blind end. The piston has a single protuberance extending normally from it's surface that resides in and travels about a spiral groove formed in the housing. The spiral groove has a series of detents, one of which can be selected to trap the protuberance and stop the spinning piston as it travels along the housing bore. The door opening assist device is installed in a door frame of an automobile to push the door open a distance determined by the detent selected. Upon closing the door, the door abuts and retracts the piston into the housing compressing the spring. Upon unlatching the door, the piston extends under spring bias in such a direction and with sufficient force to push the door to an open position a predetermined distance. The door opening assist device provides various mounting options through the use of a jam nut and a mounting plate.
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