US4150838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wheeled carriage for recreational purposes
Assignee: Individual
•
Filing: 1977-10-25
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Granted: 1979-04-24
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Expires: 1997-10-25
Abstract
Abstract A wheeled carriage for recreational purposes comprising a platform large enough for a person to stand on with his or her feet side by side, and a single front wheel and a single rear wheel mounted to said platform so as to be capable of rotation about spaced parallel axes and with the centers of the wheels lying in the longitudinal vertical central plane of said platform, the wheels being of rounded profile to enable the platform to tilt laterally in use, the platform being offset above or below the axes of the wheel, whereby the carriage can be used either way up, the platform being above the wheel axis when the carriage is one way up so as to require a high level of skill to maintain the carriage balanced, and the platform being below the wheel axes when the carriage is the other way up so as to require a lower level of skill to maintain the carriage balanced.
Inventors
- 👤 Colin R. Lappage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:18
CPC Classifications
A; A63; A63C; A63C17/00; A63C17/22; A63C17/24; A63C17/01; A63C17/011; A63C17/013; A63C17/014; A63C17/016
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
161 words
A wheeled carriage for recreational purposes comprising a platform large enough for a person to stand on with his or her feet side by side, and a single front wheel and a single rear wheel mounted to said platform so as to be capable of rotation about spaced parallel axes and with the centers of the wheels lying in the longitudinal vertical central plane of said platform, the wheels being of rounded profile to enable the platform to tilt laterally in use, the platform being offset above or below the axes of the wheel, whereby the carriage can be used either way up, the platform being above the wheel axes when the carriage is one way up so as to require a high level of skill to maintain the carriage balanced, and the platform being below the wheel axes when the carriage is the other way up so as to require a lower level of skill to maintain the carriage balanced.
Claim 2
Dependent Claim
161 words
A wheeled carriage for recreational purposes comprising a platform large enough for a person to stand on with his or her feet side by side, and a single front wheel and a single rear wheel mounted to said platform so as to be capable of rotation about spaced parallel axes and with the centers of the wheels lying in the longitudinal vertical central plane of said platform, the wheels being of rounded profile to enable the platform to tilt laterally in use, the platform being offset above or below the axes of the wheel, whereby the carriage can be used either way up, the platform being above the wheel axes when the carriage is one way up so as to require a high level of skill to maintain the carriage balanced, and the platform being below the wheel axes when the carriage is the other way up so as to require a lower level of skill to maintain the carriage balanced.
Claim 3
Dependent Claim
42 words
A wheeled carriage according to claim 1 in which the axes of the wheels are fixed, the wheels rotating about spaced axes parallel with each other and with the platform, and normal to the imaginary line joining the centres of the wheels.
Claim 4
Dependent Claim
20 words
A wheeled carriage according to claim 1 in which the platform comprises a base plate with a peripheral tubular frame.
Claim 5
Dependent Claim
20 words
A wheeled carriage according to claim 1 in which the wheels comprise preformed inflatable balls retained between rotatable concave discs.
Claim 6
Dependent Claim
28 words
A wheeled carriage according to claim 1 in which the front wheel is so mounted as to project forward in front of any other part of the carriage.
Claim 7
Dependent Claim
46 words
A wheeled carriage according to claim 1 in which there is provided stop means operative in use, when the carriage is one way up or is the other way up, to prevent the user's feet sliding laterally off the platform when the carriage is at rest.
Claim 8
Dependent Claim
90 words
A wheeled carriage according to claim 3 in which the peripheral tubublar frame includes a tube part extending along one side edge of the plate and a tube part extending along the other side edge of the plate, each tube part extending both above and below the level of the plate to provide stop means operative in use when the carriage is either way up to restrain a user against sliding laterally off the platform and to engage the ground when the carriage tilts in excess of a predetermined amount.
Claim 9
Dependent Claim
55 words
A wheeled carriage according to claim 1 in combination with a pair of guide sticks, the guide sticks having hook formations whereby they can be releasably attached to the carriage to enable it to be towed when not in use, but which can be detached from the carriage when the carriage is to be used.
Claim 10
Dependent Claim
141 words
A wheeled carriage for recreational purposes comprising a platform large enough for a person to stand on with his or her feet side by side, and mounting means at the front and at the rear of the platform, and rotatable about spaced parallel axes, the mounting means being constructed and arranged to receive single preformed resilient balls at the respective front and rear of the platform so as to constitute with such balls front and rear wheels rotatable about said axes, with the centers of the wheels lying in the longitudinal vertical central plane of the platform, the platform being offset above or below said axes, whereby the carriage can be used either way up, the platform being above the axes when the carriage is one way up and being below the axes when the carriage is the other way up.
Claim 11
Dependent Claim
141 words
A wheeled carriage for recreational purposes comprising a platform large enough for a person to stand on with his or her feet side by side, and mounting means at the front and at the rear of the platform, and rotatable about spaced parallel axes, the mounting means being constructed and arranged to receive single preformed resilient balls at the respective front and rear of the platform so as to constitute with such balls front and rear wheels rotatable about said axes, with the centers of the wheels lying in the longitudinal vertical central plane of the platform, the platform being offset above or below said axes, whereby the carriage can be used either way up, the platform being above the axes when the carriage is one way up and being below the axes when the carriage is the other way up.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |