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 Title: |
US4657272:
Wheeled vehicle
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Davenport, James M.; Laguna Niguel, CA 92677
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| Assignee: |
None
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| Published / Filed: |
1987-04-14
/ 1985-09-11
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| Application Number: |
US1985000774993
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| IPC Code: |
Advanced:
B62K 5/02;
B62K 5/04;
IPC-7:
B62K 5/04;
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| ECLA Code: |
B62K5/02; L62K15/00D;
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| U.S. Class: |
Current:
280/266;
280/282;
Original:
280/266;
280/282;
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| Field of Search: |
280/205,281 LP,282,87.04 A,266
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| Priority Number: |
| 1985-09-11 |
US1985000774993 |
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| Abstract: |
A new and unique wheeled vehicle comprising a unicycle-like device. The device employs the same general elements as a unicycle including a single large drive wheel, a pair of pedals, a seat, and a pair of forks to support the seat. Attached to the rear of the device is an additional set of support wheels. The support wheels are attached through a support frame which extends generally rearwardly and downwardly from the center of the drive wheel. The support wheels are attached to one another by an axle, which is in turn attached to the support frame in such a manner that the support wheels pronate and track through turns as the drive wheel is turned to the right or left. Under normal conditions the support wheels remain on the ground at all times. This device provides the rider with additional longitudinal stability without adding a significant increment of lateral stability.
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| Attorney, Agent or Firm: |
Workman, Nydegger & Jensen ;
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| Primary / Asst. Examiners: |
Love, John J.; Watts, Charles R.
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| Maintenance Status: |
E2 Expired Check current status
CC Certificate of Correction issued
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| INPADOC Legal Status: |
Show legal status actions
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| Family: |
None
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First Claim:
Show all 25 claims |
What is claimed and desired to be secured by United States Letters Patent is:
1. A wheeled vehicle comprising:
- a drive wheel having a drive axle;
- a first frame member attached to the drive wheel for supporting a rider, said first frame member extending generally upwardly from the drive axle such that the center of gravity of the rider is substantially positioned over the drive axle;
- drive means for causing the drive wheel to rotate;
- at least two support wheels;
- a second frame member for fixedly positioning the support wheels in relation to the drive wheel such that the support wheels are positioned rearward of the drive wheel, said second frame member extending generally rearwardly and outwardly from the drive axle and attached to the support wheels; and
- means for allowing sufficient vertical and horizontal rotation of the support wheels to allow the support wheels to pronate as the wheeled vehicle turns such that the support wheels track rearward of the drive wheel.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 64 U.S. patent(s) that reference this one
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| Foreign References: |
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| Other References: |
Proceedings of the Fourth Symposium on Human Factors and Industrial Design in Computer Products, St. Paul, MN (1985).
S. Russell, "Inventors Come of Age," Venture Magazine, pp. 42 to 44 (Dec. 1984).
E. J. Stefanides, "Tricycle Gives High Stability, Tight Cornering," Design News (Mar. 1984).
"The Bicycle," Industrial Design Magazine, pp. 36 to 41 (Jul./Aug. 1983).
Thomas Ferrick, Jr., "A paraplegic Invents A Stable Handcycle," The Philadelphia Inquirer (Nov. 1982).
Product brochure of Victory Lane Recreational Products of Walla Walla, Washington.
Product brochure of the "Unicycle".
Product brochure of Ellefson Engineering, Inc. of Chaska, MN.
Product brochure of Landspeeder, Inc. of Westport, CT.
Product brochure of Landspeeder, Inc. of Westport, CT.
Product brochure of Trail Mate of Sarasota, FL.
Product brochure of New England Handcycles, Inc. of Brookline, MA.
"The Trike--Hand-Powered Mobility," Magazine article.
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