US 4,830,388 AGranted

Ridable multi-functional wheelchair assembly

AssigneeAllen S. P. Wang

InventorAllen S. P. Wang

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Abstract

A ridable multi-functional wheelchair assembly, aside from being used as a general wheelchair, may be converted into a pedicab by connecting a rear wheel thereto; the pedicab may be further converted into a tread wheel by suspending the rear wheel from the ground or floor with an U-shaped supporter.

Claims7

Dependent claims

A ridable multi-functional wheelchair assembly, comprising:

a wheelchair having two bilaterally symmetrical frameworks, each comprising of a front vertical bar, a rear vertical bar, a chair arm, and a side bottom bar;
each of said frameworks further comprising:
a sleeve perpendicularly fixed at an inner substantially middle portion of said side bottom bar;
a front wheel axle projecting outwardly near a bottom middle portion of said side bottom bar for removably receiving and connecting a front wheel;
a wheel seat means welded to a lower end of said front vertical bar for removably connecting a direction-control wheel;
and
a hand-push wheel axle welded to a lower end of said rear vertical bar for removably connecting a hand-push wheel;
an inter-wheel rod having joint pins formed at each end for removably connecting said rod to said sleeves of said frameworks, each of said sleeves securely receiving one of said joint pins by screwing a bolt through a threaded hole formed at a side of each of said sleeves and a hole correspondingly formed on the joint pin, said rod comprising a backward opened U-shaped adapter welded at a rear, substantially middle portion thereof, said U-shaped adapter having an opening on each horizontally extending plane thereof;
a bicycle frame for removable attachment to said inter-wheel rod, said frame having a hollow sleeve-like head vertically formed at a front end to be fitted into said backward opened U-shaped adapter and to be pivotally secured thereto by a bolt inserted through said openings formed on the horizontal planes of said adapter and a nut screwed onto said bolt for removably attaching said frame to said wheelchair, said frame further having attachment means;
and
a saddle pillar having a saddle connected to a top end thereof, a rear wheel connected via a rear wheel axle at a rear portion thereof, and an upper joint and a lower joint separately formed at a lower portion thereof, said upper joint and said lower joint having side threaded holes disposed at a position corresponding to said attachment means of said bicycle frame for connecting said saddle pillar to said frame.

8 more elements

Dependencies are inferred from the claim text.

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Abstract

A ridable multi-functional wheelchair assembly, comprising:

a wheelchair having two bilaterally symmetrical frameworks, each comprising of a front vertical bar, a rear vertical bar, a chair arm, and a side bottom bar;
each of said frameworks further comprising:
a sleeve perpendicularly fixed at an inner substantially middle portion of said side bottom bar;
a front wheel axle projecting outwardly near a bottom middle portion of said side bottom bar for removably receiving and connecting a front wheel;
a wheel seat means welded to a lower end of said front vertical bar for removably connecting a direction-control wheel;
and
a hand-push wheel axle welded to a lower end of said rear vertical bar for removably connecting a hand-push wheel;
an inter-wheel rod having joint pins formed at each end for removably connecting said rod to said sleeves of said frameworks, each of said sleeves securely receiving one of said joint pins by screwing a bolt through a threaded hole formed at a side of each of said sleeves and a hole correspondingly formed on the joint pin, said rod comprising a backward opened U-shaped adapter welded at a rear, substantially middle portion thereof, said U-shaped adapter having an opening on each horizontally extending plane thereof;
a bicycle frame for removable attachment to said inter-wheel rod, said frame having a hollow sleeve-like head vertically formed at a front end to be fitted into said backward opened U-shaped adapter and to be pivotally secured thereto by a bolt inserted through said openings formed on the horizontal planes of said adapter and a nut screwed onto said bolt for removably attaching said frame to said wheelchair, said frame further having attachment means;
and
a saddle pillar having a saddle connected to a top end thereof, a rear wheel connected via a rear wheel axle at a rear portion thereof, and an upper joint and a lower joint separately formed at a lower portion thereof, said upper joint and said lower joint having side threaded holes disposed at a position corresponding to said attachment means of said bicycle frame for connecting said saddle pillar to said frame.

8 more elements