Land vehicles – Wheeled – Tiltable vehicles – stabilized by attendant or article
Reexamination Certificate
1998-10-30
2001-03-06
Mai, Lanna (Department: 3619)
Land vehicles
Wheeled
Tiltable vehicles, stabilized by attendant or article
C280S047315
Reexamination Certificate
active
06196561
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to a multi-purpose support structure with an extendable handle and retractable wheels.
DESCRIPTION OF THE PRIOR ART
Wheel-containing structures used to support and transport loads of various types, such as rucksacks, suitcases, bags, books, child carriers, etc., are known. These structures generally pose various problems, related both to their use and to user's requirements. In particular, from starting school, students are often required to transport books and other large heavy scholastic objects to the extent of causing the student to assume a curved position during walking and running. There is hence a consequent risk of malformation, in particular of the spine, with possible negative consequences during that particular period of skeletral development.
Apart from school use, it is usual to transport for the most varied needs various types of bulky objects, rucksacks, suitcases, bags and child carriers, and it is well known that such transportation creates fundamental problems, such as their weight acting totally on the hands or back of the person carrying them, and variability in transportation, which can occur partly in an automobile, partly on foot, partly on a motor bus or other public vehicle, etc.
In seeking to provide an overall solution to the problem, various arrangements have been proposed, such as suitcases with wheels, foldable pushchairs, and foldable carrier trolleys. A suitcase with wheels is very difficult to transport, especially if the wheels are small. A foldable pushchair requires a complicated and difficult operation for its folding. A carrier trolley has the additional nuisance of difficult storage when not in use, and a certain laboriousness in opening the trolley and fixing to it the object to be transported.
U.S. Pat. No. 4,588,055 discloses a device for towing luggage incorporated into a wall of the luggage comprising a pair of fixed tubes, a pair of push-pull tubes and a U-shaped tube wherein each end of the U-shaped tubes is connected to the push-pull tubes.
An object of the invention is to provide a multi-purpose support structure which can be used in the most varied situations, and is of small overall size, is easily transformed and is totally adaptable to different applications.
BRIEF SUMMARY OF THE INVENTION
This and further objects which will be apparent from the ensuing description are attained according to the invention by a multi-purpose support structure with an extendable handle and retractable wheels, including in combination:
a support frame with a pair of longitudinal uprights,
a handle element, with two parallel sides slidable within the uprights and with a transverse connecting side forming a gripping element,
wherein:
each upright comprises first and second guide channels extending parallel to each other side by side,
said parallel sides of the handle element are slidable within said first guide channel,
and wherein it further comprises:
a pair of rods provided lowerly with the wheels and slidable within said second guide channels, and
means for simultaneously and opposingly moving said parallel sides of said handle element and said rods along their respective guide channels.
REFERENCES:
patent: 3857618 (1974-12-01), Hagen et al.
patent: 4254850 (1981-03-01), Knowles
patent: 4575109 (1986-03-01), Cowdery
patent: 4588055 (1986-05-01), Chen
patent: 4915402 (1990-04-01), Brinker
patent: 5209576 (1993-05-01), Kasai
patent: 5259664 (1993-11-01), Cottle
patent: 5879021 (1999-03-01), Papendick
Hoffman Wasson & Gitler
Mai Lanna
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