US4524987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tricycles
Assignee: MYUNG KEUN OH
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Filing: 1983-02-28
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Granted: 1985-06-25
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Expires: 2003-02-28
Abstract
Abstract This invention provides a tricycle having a simple frame that is shaped to provide an efficient low profile, lever actuation, which is adapted to be hand-operated for enjoyable, interesting and efficient training purposes, including efficient propulsion, and interesting and enjoyable arm-hand training and coordination. The frame also has low profile steering from a sitting or leg-outstretched position, which is comfortable, provides a low center of gravity and enhances the efficiency, enjoyment, training and coordination provided by the hand-operation. Still further, the frame is shaped to provide a strong, simple and effective coupling system for connecting more than one tricycle in a train for purposes of education, enjoyment, efficiency, training and coordination.
Inventors
- 👤 Sang K. Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:18
CPC Classifications
B; B62; B62K; B62K5/00; B62K5/02; B62K5/06; B62K9/00; B62K9/02; B62K3/00; B62K3/005; B62M; B62M1/00; B62M1/14; B62M1/16
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
211 words
A tricycle (13), comprising a support body (3), forming a frame (14) having levers (6) mounted thereof for opposite reciprocation, lever actuated rear wheels (10) in operable association with the levers (6) and having rear wheel supports (15) mounted on the frame (14), and a front wheel (1) having a front wheel support (17) mounted on the frame (14); the frame (14) being shaped to provide a low profile, low center-of-gravity seat (19) mounted on the frame (14) for hand actuated lever operation of the back wheels (10) by an operator who also is in a low profile, low center-of-gravity sitting position on the seat (19) for foot steering of the front wheel (1); said frame (14) also having front and rear ends (21 and 23) forming upwardly directed portions (25 and 27) having fast operation couplings (29 and 31) for selectively and removably connecting the said tricycle to another said tricycle in a train (32) said frame including parallel bars (33 and 35) having first horizontal portions (37 and 39) in front of the levers and said first horizontal portions having two first upwardly directed front portions (41 and 43) extending to a connection (45) therebetween positioned forwardly of said front wheel forming one of said fast operating couplings (29).
Claim 2
Dependent Claim
211 words
A tricycle (13), comprising a support body (3), forming a frame (14) having levers (6) mounted thereof for opposite reciprocation, lever actuated rear wheels (10) in operable association with the levers (6) and having rear wheel supports (15) mounted on the frame (14), and a front wheel (1) having a front wheel support (17) mounted on the frame (14); the frame (14) being shaped to provide a low profile, low center-of-gravity seat (19) mounted on the frame (14) for hand actuated lever operation of the back wheels (10) by an operator who also is in a low profile, low center-of-gravity sitting position on the seat (19) for foot steering of the front wheel (1); said frame (14) also having front and rear ends (21 and 23) forming upwardly directed portions (25 and 27) having fast operation couplings (29 and 31) for selectively and removably connecting the said tricycle to another said tricycle in a train (32) said frame including parallel bars (33 and 35) having first horizontal portions (37 and 39) in front of the levers and said first horizontal portions having two first upwardly directed front portions (41 and 43) extending to a connection (45) therebetween positioned forwardly of said front wheel forming one of said fast operating couplings (29).
Claim 3
Dependent Claim
60 words
The tricycle of claim 1 in which the frame (14) includes parallel bars (33 and 35) having second horizontal portions (49 and 51) behind the levers and that have two upwardly directed rear portions (53 and 55) extending to a connection (57) therebetween, and another of said fast operating couplings being a rear coupling (39) on the upwardly directed portions.
Claim 4
Dependent Claim
52 words
The tricycle (13) of claim 2 in which the rear coupling includes a rear hook (61) for connecting two of said tricycles (13) together in a train so that the front coupling of one of said tricycles mates with the rear hook (61) of another of said tricycles in said train (32).
Claim 5
Dependent Claim
42 words
The tricycle of claim 3 in which the rear hook (61) is mounted on a rear cross-piece (63) that is mounted between the upwardly directed rear portions (53 and 55) for supporting the rear end of the seat (19) on the frame.
Claim 6
Dependent Claim
71 words
The tricycle of claim 4 in which the seat (19) has a front cross-piece (65) that is mounted between the parallel bars (33 and 35) and the bottom (67) of the seat (19) for supporting the front end of the seat on the frame so that the bottom of the seat is mounted in a plane (70) that is generally parallel to the bars (33 and 35) at a distance thereabove.
Claim 7
Dependent Claim
70 words
The tricycle of claim 5 in which the rear wheels (10) touch a plane (71) that is above the plane (69) generally parallel to the bars (33 and 35) and below the plane (70) of the bottom of the seat (19), and the front wheel is smaller than the rear wheels and touches a plane (72) that is below the plane (69) generally parallel to the bars (33 and 35).
Claim 8
Dependent Claim
121 words
The tricycle (13) of claim 6 in which the levers (6) extend below the frame (14) to a point (73) above a plane (75) touching the bottom of the wheels (1 and 10), the levers (6) extending above the frame (14), to a point (77) above the bottom (67) of the seat, and the levers (6) have connecting rod means (8) for connecting the bottom of the levers to the lever actuated rear wheels, the latter including a crankshaft (5) having two oppositely located and oppositely directed cranks (5') for oppositely reciprocating the levers to rotate the crankshaft, and means including a chain (12) for transmitting the rotation of the crankshaft to the rear wheels at a location beneath the seat(19).
Claim 9
Dependent Claim
89 words
The tricycle of claim 7 in which the front wheel support (17) comprises a front wheel cross-piece (79) spanning the space (81) between the parallel bars (33 and 35), shaft support (83), which is mounted on the cross-piece, a shaft (85) that is mounted on the shaft support, and a U-shaped fork member (87) that is attached to the shaft for supporting a front wheel axle (1') for the front wheel (1) from the frame (14), said front wheel axle (1') having steps (2) for steering the front wheel.
Claim 10
Dependent Claim
37 words
The tricycle of claim 8 inwhich the front wheel support (17) has a spring (89) between the front wheel cross-piece and the U-shaped fork for cushioning the transmission of shock from the front wheel to the frame.
Claim 11
Dependent Claim
21 words
The tricycle of claim 9 in which the front wheel support has a fork member that is made from tubular steel.
Claim 12
Dependent Claim
20 words
The tricycle of claim 10 in which the frame (14) is formed from tubular steel having a round cross-section (91).
Claim 13
Dependent Claim
72 words
The tricycle of claim 11 in which the two levers are formed from hollow steel tubes (93 and 95) that are mounted on support portions (7) on a support shaft (4) that spans the space (81) between the parallel bars (33 and 35) so as to have handles (97) that are at a level above the level of the seat (19) for hand operation by an operator seated on the seat (19).
Claim 14
Dependent Claim
125 words
The tricycle of claim 12 having power train means (99) for transmitting the reciprocating motion of the levers (6) to the rotation of the rear wheels (10), comprising connecting rods (8) for each lever (6), a chain gear (9) on the crankshaft (5) between the oppositely directed cranks (5') thereon, a driven gear (11) on the axle (10') of the rear wheels (10) so that the chain (12) runs on the chain gear (9) and the driven gear (11), the power train means (99) for transmitting the reciprocating motion being above the bottom part (6') of the levers (6) during at least part of this reciprocation so as to give power easily to the rear wheels while maintaining a low center-of-gravity and a low profile.
Claim 15
Dependent Claim
47 words
The tricycle of claim 13 in which the seat (19) in cross-section has a narrow portion (101) for the operator's legs extending from an enlarged portion (103) adjacent a portion of the upwardly directed rear portions (27) of the frame (14) that forms a back rest (105).
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-24 | 1988-12-24 | 1989-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-24 | 1992-12-24 | 1993-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-24 | 1996-12-24 | 1997-06-25 | $7700.00 | Window Closed / Lapsed |