Apparatus for opening and closing wing door of truck

Land vehicles: bodies and tops – Bodies – Door or window with specified vehicle feature

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C296S183100, C049S345000, C049S346000

Reexamination Certificate

active

06554346

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to an apparatus for opening and closing a wing door and, in particular to an apparatus for opening and closing a wing door of an truck.
Hydraulic actuators or electric motor have heretofore been used as drive power sources for opening and closing a wing door.
If the hydraulic actuators or electric motors are used as a drive power source for opening and closing a wing door, piping, wiring and/or power supplies for driving the hydraulic actuators or electric motors are necessary.
Problems occur that the apparatus for opening and closing the wing door is increased in its scale, that cost and labor are required for its maintenance and that repair is cumbersome if the drive apparatus malfunctions.
It is an object of the present invention to provide an apparatus for opening and closing a wing door, which is simple in structure comprising a spring and a link mechanism, and is almost free of maintenance. It is another object of the present invention to provide an apparatus for opening and closing a wing door in which a force is uniformly applied upon a “spring” which is a drive power source for opening and closing a wing door, in which no excessive force is applied to a “spring rod” which is connected to the “spring”, and which is excellent in reliability and durability.


REFERENCES:
patent: 5992918 (1999-11-01), Gobart et al.
patent: 6247747 (2001-06-01), Kawanomoto et al.
patent: 1-111520 (1989-04-01), None
patent: 08-067148 (1996-03-01), None
patent: 08-332849 (1996-12-01), None
patent: 2000-006664 (2000-01-01), None
patent: 2000-006665 (2000-01-01), None
patent: 2000-052776 (2000-02-01), None
patent: 2001-206066 (2001-07-01), None
patent: 2002-115450 (2002-04-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Apparatus for opening and closing wing door of truck does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for opening and closing wing door of truck, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for opening and closing wing door of truck will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3058000

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.