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 Title: |
US6007074:
Frictionless noncontact engaging drive skate and skateboard
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Tarng, Min Ming; San Jose, CA
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| Assignee: |
Tang System, San Jose, CA
other patents from TANG SYSTEM (763073) (approx. 2)
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| Published / Filed: |
1999-12-28
/ 1993-08-23
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| Application Number: |
US1993000110629
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| IPC Code: |
Advanced:
A63C 17/12;
Core:
A63C 17/00;
IPC-7:
B62M 1/04;
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| ECLA Code: |
A63C17/12;
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| U.S. Class: |
Current:
280/011.115;
192/084.3;
280/087.042;
280/844;
305/044;
Original:
280/011.115;
280/844;
280/087.042;
305/044;
192/084.3;
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| Field of Search: |
280/11.28,11.115,844,11.21,87.041,87.042
192/84.3
305/044
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| Priority Number: |
| 1993-08-23 |
US1993000110629 |
| 1991-03-01 |
US1991000662717 |
| 1989-08-03 |
US1989000389691 |
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| Abstract: |
The single-foot drivable skate and skateboard is constituted of the simultaneously steering-driving mechanism, synchronous differential driving mechanism, wheel and board. The simultaneously steering-driving mechanism comprises a universal pedal, the driving-steering rod and the single pole truck. The single pole truck pivotally supports the board with a pivot joint or ball joint. The driving-steering rod slides in the slot passing through the pivotal joint and the truck. The synchronous differential driving mechanism made of the noncontact gripping force or the upper-bounded gripping force includes the engaging drums shifted by the shift screws. The shift screws are knotched at the ends of the crankshaft axis. With the manipulation of a sole or heel, the skate or skateboard can twist the pedal to skate, tread the pedals to skate forward and backward, accelerate, decelerate, free-run, brake, turn right and left. To run on muddy and snowy roads, the non-stretchable length-adjustable belts are wrapped on the groovy sprocket wheels. The universal length-adjusting gears adjust the length of the belts and keep the tension in the belts.
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| Primary / Asst. Examiners: |
Mitchell, David M.;
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| Maintenance Status: |
E1 Expired Check current status
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Parent Case: |
This is a continuation-in-part of Ser. No. 07/662,717, filed Mar. 1, 1991 and now abandoned, which is a continuation of Ser. No. 07/389,691 filed Aug. 3, 1989.
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| Family: |
Show 3 known family members
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First Claim:
Show all 20 claims |
What I claim is:
1. An undivided continuous axle differential transmission drive apparatus comprises a frame means, a plurality of wheels being rotationally mounted on an undivided continuous axle with a plurality of differential drive means,
- said undivided continuous axle being rotationally mounted on said frame, said differential drive means being mounted at a hub of each said wheel, said undivided continuous axle being rotationally mounted on said wheels passing through said differential drive means; inside each of said differential drive means, a differential matching screw being notched on said undivided continuous axle;
- said differential drive means comprising a hub body, an engaging drum an d a gripping means for said engaging drum; said hub body being rotationally mounted on said undivided continuous axle an d said frame;
- for each of said differential drive means, said engaging drum being rotationally mounted on said differential matching screw of said undivided continuous axle; as said engaging drum engages with said hub body, said wheel being driven to rotate by said undivided continuous axle; as said undivided continuous axle driving said wheels to rotate first, then said undivided continuous axle slowing down rotating speed, each of said differential matching screws on each end of the continuous axle having opposite screw directions such that all said wheels are released to be free running;
- said gripping means attached to said frame to apply gripping force to grip said engaging drum during rotation of said undivided continuous axle; as said undivided continuous axle rotates in a forward direction, said engaging drum being shifted to move by said differential matching screw in one direction, as said engaging drum engages with said hub body, said wheel being driven to rotate in forward direction; as said undivided continuous axle rotates in reverse direction, said engaging drum being shifted by said differential matching screw to move in another direction, as said engaging drum engages with said hub body, said wheel being driven to rotate in reverse direction;
- said undivided continuous axle differential transmission drive having transmission functions of running forward, running backward, free-running and differential function that wheels have different rotating speeds; said wheels having different rotating speed being in differential drive mode: as said undivided continuous axle rotates slower than said wheels, said wheels are disengaged and free-running; when said wheels have different rotating speeds, said undivided continuous axle driving said wheel having slower rotating speed; said engaging drum engaging with said hub to drive said wheel having slower rotating speed; said undivided continuous axle releasing said wheel having faster rotating speed; said engaging drum to be shifted backward to disengage with said hub to allow said wheel having faster rotating speed being free to run;
- said undivided continuous axle differential transmission drive having anti-ice-skidding capability, as a vehicle spinning on ice, wheels on outside curve rotating faster than wheels at spinning center, said undivided continuous axle differential transmission drive releasing faster wheels and transmitting power to slower wheels to counter-balance of spinning momentum to pull out said vehicle from spinning and regain control of said vehicle;
- said undivided continuous axle differential transmission drive having anti-sand-trapping capability, as said vehicle being trapped in sand, wheels having less frictional pulling force rotating faster than wheels having larger frictional pulling force, said undivided continuous axle differential transmission drive releasing faster wheels and transmitting power to slower wheels to gain more pulling force to pull out said vehicle from sand trap.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 7 U.S. patent(s) that reference this one
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