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 Title: |
US4786069:
Unicycle
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Tang, Chun-Yi; Bellevue, WA 98008
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| Assignee: |
None
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| Published / Filed: |
1988-11-22
/ 1987-02-09
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| Application Number: |
US1987000012722
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| IPC Code: |
Advanced:
A63B 23/04;
B62K 1/00;
B62K 17/00;
Core:
more...
IPC-7:
B62K 1/00;
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| U.S. Class: |
Current:
280/221;
074/594.1;
074/594.4;
280/011.115;
482/051;
482/075;
Original:
280/221;
074/594.1;
074/594.4;
272/073;
272/114;
280/011.115;
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| Field of Search: |
280/205,221,11.115
074/594.1,594.4
272/073,114
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| Priority Number: |
| 1987-02-09 |
US1987000012722 |
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| Abstract: |
Tubular spacers (28) are positioned between the wheels (10, 12) of a unicycle. Inboard portions of tie bolts (34) extend through the spacers (28). A threaded end portion (38) of the tie bolt (34) screws into a T-nut (40) provided within an opening (26) in a wheel (12). The shaft of the tie bolt (34) projects through an opening (24) in the other wheel (10) and projects outwardly beyond the wheel (10). A second tubular spacer (50) closely surrounds the outboard portion of the tie bolt (34). At one end (52) this spacer bears against an abutment (46). At its opposite end (54) it abuts against the inner surface of the tie bolt head (36). When the tie bolt (34) is tightly screwed into the T-nut (46), it is put into tension and the tubular spacers (28, 50) are put into compression. A pedal element (56) is mounted for rotation about the outboard tubular spacer (50).
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| Attorney, Agent or Firm: |
Barnard, Delbert J. ;
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| Primary / Asst. Examiners: |
Love, John J.; Hill, Mitchell S.
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| Maintenance Status: |
E1 Expired Check current status
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| INPADOC Legal Status: |
Show legal status actions
Family Legal Status Report
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| Related Applications: |
| Application Number |
Filed |
Patent |
Pub. Date |
Title |
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| US1986000879985 | 1986-07-30 |
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| US1986000941829 | 1986-12-15 |
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| Parent Case: |
RELATED APPLICATION
This is a continuation-in-part of my copending application Ser. No. 879,985, filed July 30, 1986, and entitled UNICYCLE, and also of my copending application Ser. No. 941,829, filed Dec. 15, 1986, and entitled UNICYCLE.
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| Designated Country: |
AT BE CH DE ES FR GB GR IT LI LU NL SE
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| Family: |
Show 5 known family members
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First Claim:
Show all 9 claims |
What is claimed is:
1. A unicycle comprising a pair of axially spaced apart disk wheels and a pair of pedal assemblies spaced apart diametrically which also serves to secure the two wheels together and make the unicycle a unitary structure, each said pedal assembly comprising:
- an elongated one piece tie bolt having a head at one end, a threaded portion at its opposite end,
- a pair of aligned bolt receiving openings in the wheels, with the opening in a first of the wheels being sized to snugly receive a midportion of the tie bolt and with the opening in the second wheel being internally threaded to mate with the threads at the end of the tie bolt,
- a first tubular spacer between the wheels, surrounding the tie bolt, said first tubular spacer comprising an annular wall with inside and outside diameter which are both substantially larger than the tie bolt diameter, said annular wall presenting an edge at each of its ends, said annular wall having a thickness dimension that is smaller than the tie bolt diameter,
- abutment means axially outwardly of the first wheel surrounding the bolt receiving opening in said wheel, said abutment means including an opening in which the tie bolt is slidably received,
- said bolt head being spaced axially outwardly from said abutment means,
- a second tubular spaced closely surrounding the tie bolt between the bolt head and the abutment means, said second tubular spacer extending axially between the bolt head and the abutment means,
- a pedal separate from said second tubular spacer surrounding said second tubular spacer, said pedal being freely rotatable about said second tubular spacer, and
- wherein the threads at the end of the bolt are of sufficient length that when the tie bolt is tightened the tie bolt is put into tension, the first tubular spacer is put into compression between the two wheels, and the annular edges at the ends of the first spacer dig into the wheels, and the second tubular spacer is put into compression between the abutment means and the bolt head, and wherein the compression of the two tubular spacers is of such a magnitude that the two wheels are secured together and the position of each to the other is fixed, by the two pedal assemblies.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
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