US5048632A — Self-propelled device

Claim 1

Independent Claim 378 words

A self-propelled roller skate device comprising two units disposed in parallel, each unit being supported on front and rear pairs of wheels, each of said units including: at least one propulsion system and a steering system mounted on a support and holding structure which includes a front frame and a rear frame; power generation and storage means mounted independently of each of said units, and remote control means operatively coupled with and acting on each of said units and said power generation and storage means: said steering system comprising: a pivotable sole-piece, said sole-piece being pivotable in response to an action of a load carried about a pair of longitudinally extending shafts with one disposed behind the other and said sole-piece being pivotable against the force of a resilient return means; a steering plate attached to a lower surface of said pivotable sole-piece; a pair of spaced, vertically disposed links pivotably connected to said steering plate and depending therefrom; a steering "T" having a vertical portion depending from a horizontal portion, the vertical portion being mounted for pivoting movement about a shaft attached to a rear wall of said front frame, a lower end of each vertically disposed link being pivotably connected to a respective end of the horizontal portion of said "T" thereby forming a deformable parallelogram; a pair of ball joints fixed at a lower part of said steering "T", each of said ball joints being located on a respective lateral side of said steering "T", each said ball joint cooperating with one end of a respective one of a pair of horizontally disposed links, each said horizontally disposed link receiving at an opposite end a ball-joint rod which is fixed to a hub on a respective one of said pair of front wheels; and a pair of upper parallelograms and a pair of lower parallelograms, each one of said upper and lower parallelograms being mounted on a respective side of said front frame for pivotable movement about a longitudinal axis, each of said parallelograms having a pair of parallel branches and a triangular portion, the outermost tip of each triangular portion of said upper and lower parallelograms being connected to a respective top ball joint and lower ball joint carried by each of said hubs.

Claim 2

Dependent Claim 378 words

A self-propelled roller skate device comprising two units disposed in parallel, each unit being supported on front and rear pairs of wheels, each of said units including: at least one propulsion system and a steering system mounted on a support and holding structure which includes a front frame and a rear frame; power generation and storage means mounted independently of each of said units, and remote control means operatively coupled with and acting on each of said units and said power generation and storage means: said steering system comprising: a pivotable sole-piece, said sole-piece being pivotable in response to an action of a load carried about a pair of longitudinally extending shafts with one disposed behind the other and said sole-piece being pivotable against the force of a resilient return means; a steering plate attached to a lower surface of said pivotable sole-piece; a pair of spaced, vertically disposed links pivotably connected to said steering plate and depending therefrom; a steering "T" having a vertical portion depending from a horizontal portion, the vertical portion being mounted for pivoting movement about a shaft attached to a rear wall of said front frame, a lower end of each vertically disposed link being pivotably connected to a respective end of the horizontal portion of said "T" thereby forming a deformable parallelogram; a pair of ball joints fixed at a lower part of said steering "T", each of said ball joints being located on a respective lateral side of said steering "T", each said ball joint cooperating with one end of a respective one of a pair of horizontally disposed links, each said horizontally disposed link receiving at an opposite end a ball-joint rod which is fixed to a hub on a respective one of said pair of front wheels; and a pair of upper parallelograms and a pair of lower parallelograms, each one of said upper and lower parallelograms being mounted on a respective side of said front frame for pivotable movement about a longitudinal axis, each of said parallelograms having a pair of parallel branches and a triangular portion, the outermost tip of each triangular portion of said upper and lower parallelograms being connected to a respective top ball joint and lower ball joint carried by each of said hubs.

Claim 3

Dependent Claim 33 words

The device as claimed in claim 1, wherein said power generation and storage means includes a power generator, a regulation device with means to override said power generator and a power storage regulator.

Claim 4

Dependent Claim 85 words

The device as claimed in claim 1, wherein: said propulsion system being associated with said rear frame and coupled with said rear wheels, and including a motor and a speed variator coupled thereto and with said rear wheels forming a propulsion system, and bevel gear means coupling said rear wheels with said variator for driving thereof imparting different forward driving speeds to said rear wheels; and a braking system associated with said wheels and including means acting on at least one of said rear wheels.

Claim 5

Dependent Claim 24 words

The device as claimed in claim 3, including means connected the front frame to the rear frame via said motor and said speed variator.

Claim 6

Dependent Claim 53 words

The device as claimed in claim 4, including jacks and wherein the speed variator is a gear box with pinions controlled by said jacks, said control system being connected to the rear wheels through the bevel gear means and a drive through a flexible coupling transmitting the rotational movement in a single direction.

Claim 7

Dependent Claim 74 words

The device as claimed in claim 4, wherein said power generation and storage means includes thermal energy means separate from each of said units, and said speed variator includes a gear box having pinions coupled with said rear wheels; jacks; and said bevel gear means includes a bevel gear box and Cardan joint means for coupling said bevel gear box through said jacks to said rear wheels for driving thereof in a single direction.

Claim 8

Dependent Claim 58 words

The device as claimed in claim 3, wherein said speed variator includes a gear box having pinions coupled with said rear wheels; and jacks, and said bevel gear means including a bevel gear box, and a Cardan joint for coupling said bevel gear box through said jacks to said rear wheels for driving thereof in a single direction.

Claim 9

Dependent Claim 39 words

The device as claimed in claim 3, wherein said braking system comprises disks mounted on at least the drive wheels and brake linings, the relative movement between said disks and said linings being controlled by said remote control means.

Claim 10

Dependent Claim 56 words

The device as claimed in claim 3, wherein said speed variator includes a gear box having pinions coupled with said rear wheels; and said bevel gear means includes a bevel gear box and Cardan joint means for coupling said bevel gear box through said jacks to said rear wheels for driving thereof in a single direction.

Claim 11

Dependent Claim 44 words

The self-propelled device as claimed in claim 1, wherein holes are formed in said vertically disposed links and in said steering "T" for regulating the length of the horizontally disposed links and for regulating the steering sensitivity and the size of the steering angle.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1994-09-16	1995-03-18	1995-09-17	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1998-09-16	1999-03-18	1999-09-17	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2002-09-16	2003-03-18	2003-09-17	$7700.00	Window Closed / Lapsed

Self-propelled device

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