DOOR OPENER ASSIST DEVICE
First Claim
1. A door opening assist device, comprising:
- a cylindrical piston having a threaded bore;
a helical spring;
a cylindrical housing having a housing bore adapted to slidingly receive the spring and the piston; and
a threaded bolt, the piston retaining the spring within the housing at a first end of the housing, the threaded bolt passing within the spring and engaging the threaded bore of the piston from an opposite second end of the housing, the piston retained within the housing by the cooperative engagement between the spring urging the piston out of the first end and the head of the bolt in abutment with the second end, the piston adjustably extending from the first end of the housing a predetermined distance by the cooperative engagement between the bolt and the threaded bore.
2 Assignments
0 Petitions
Accused Products
Abstract
The present invention provides a door opening assist device comprising a spring-biased piston having a threaded bore mounted in a cylindrical housing by a threaded bolt. The piston retains a spring within the housing at a first end of the housing. The threaded bolt engages the piston from a second end of the housing. The piston is retained within the housing by the cooperative engagement between the spring urging the piston out of the first end and the head of the bolt in abutment with the second end. The door opening assist device is installed in a door frame of an automobile to push the door open a predetermined distance. The door opening assist device provides various mounting options. 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 cooperative engagement between the bolt and the piston provides adjustment feature to tailor the opening characteristics of the door opening assist device to control the opening of the door.
-
Citations
19 Claims
-
1. A door opening assist device, comprising:
-
a cylindrical piston having a threaded bore;
a helical spring;
a cylindrical housing having a housing bore adapted to slidingly receive the spring and the piston; and
a threaded bolt, the piston retaining the spring within the housing at a first end of the housing, the threaded bolt passing within the spring and engaging the threaded bore of the piston from an opposite second end of the housing, the piston retained within the housing by the cooperative engagement between the spring urging the piston out of the first end and the head of the bolt in abutment with the second end, the piston adjustably extending from the first end of the housing a predetermined distance by the cooperative engagement between the bolt and the threaded bore. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A door opening assist device, comprising:
-
a cylindrical piston having a threaded bore;
a helical spring;
a cylindrical housing having a housing bore adapted to slidingly receive the spring and the piston, the diameter of the housing bore being smaller at the second end as the first end defining an inwardly-extending flange, the flange adapted to retain the spring at the second end; and
a threaded bolt, the piston retaining the spring within the housing at a first end of the housing, the threaded bolt passing within the spring and engaging the threaded bore of the piston from an opposite second end of the housing, the piston retained within the housing by the cooperative engagement between the spring urging the piston out of the first end and the head of the bolt in abutment with the flange of the second end, the piston adjustably extending from the first end of the housing a predetermined distance by the cooperative engagement between the bolt and the threaded bore. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
-
Specification