Patent US5373791A successfully refreshed from Google Patents.
US5373791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toy wheel
Assignee: Lego AS
•
Filing: 1991-12-03
•
Granted: 1994-12-20
•
Expires: 2011-12-03
Abstract
Abstract A toy wheel for a model electric train is provided which is formed of two parts axially arranged next to each other. One part of the wheel has a rolling face having a high coefficient of friction for engagement with a track rail. The other part of the wheel is electrically conducting and, in use, engages a side of the track rail. A spring biases the electrically conducting part toward the rolling part and, in use, into electrical engagement with the current carrying rail on which the rolling part rides.
Inventors
- 👤 Erik Bach
- 👤 Kaj S. Mikkelsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:15
CPC Classifications
A; A63; A63H; A63H33/00; A63H33/04; A63H33/042; A63H17/00; A63H17/26; A63H17/262
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
179 words
An electrical contacting toy wheel for a model electrical train having wheels which ride along rails of a track and a motor which draws electric current from the track to drive the wheels of said train along said rails, each of said wheels having a rolling face that rides upon a rail and a flange that rolls alongside said rail, said contacting wheel comprising: a first wheel part having a rolling face, said rolling face having a surface with a sufficiently high coefficient of friction so that in use, said first wheel part rides on said rail and frictionally engages said rail to propel said model electrical train along said track; a second wheel part formed of an electrically conducting material disposed axially adjacent to said first wheel part on one side of said rolling face, said second wheel part defining said flange which rolls alongside said rail and forming a part of an electrical current path to said motor; and biasing means resiliently urging said second wheel part toward said first wheel part to conductively engage said track.
Claim 2
Dependent Claim
179 words
An electrical contacting toy wheel for a model electrical train having wheels which ride along rails of a track and a motor which draws electric current from the track to drive the wheels of said train along said rails, each of said wheels having a rolling face that rides upon a rail and a flange that rolls alongside said rail, said contacting wheel comprising: a first wheel part having a rolling face, said rolling face having a surface with a sufficiently high coefficient of friction so that in use, said first wheel part rides on said rail and frictionally engages said rail to propel said model electrical train along said track; a second wheel part formed of an electrically conducting material disposed axially adjacent to said first wheel part on one side of said rolling face, said second wheel part defining said flange which rolls alongside said rail and forming a part of an electrical current path to said motor; and biasing means resiliently urging said second wheel part toward said first wheel part to conductively engage said track.
Claim 3
Dependent Claim
19 words
A toy wheel according to claim 1, wherein said wheel first part rolling face surface comprises a rubber ring.
Claim 4
Dependent Claim
26 words
A toy wheel according to claim 1 wherein the second wheel part comprises a cone shaped flange extending radially beyond said first wheel part rolling face.
Claim 5
Dependent Claim
47 words
A toy wheel according to claim 1 wherein the electrical contacting toy wheel is journalled in a bracket, and said biasing means comprises a spring body provided on the bracket, said spring body being adapted to press the wheel second part resiliently against the wheel first part.
Claim 6
Dependent Claim
32 words
A toy wheel according to claim 4, wherein said spring body is incorporated in said electrical current path from the wheel second part to one or more current consumers on the train.
Claim 7
Dependent Claim
26 words
A toy wheel according to claim 1, further comprising means for retaining the wheel first and the wheel second part to one another to rotate together.
Claim 8
Dependent Claim
64 words
A toy wheel according to claim 6 further comprising holding pins on said wheel first part extending in an axial direction and corresponding openings on the wheel second part positioned to receive said pins whereby said pins secure the wheel second part to said wheel first part while permitting limited axial movability of said wheel second part with respect to the wheel first part.
Claim 9
Dependent Claim
19 words
A toy wheel according to claim 1, wherein said wheel first part and wheel second part can independently rotate.
References Cited (Backward Citations)
US717340A
Cited
US1754995A
Cited
US1830879A
Cited
FR725214A
Cited
US2079525A
Cited
US2462073A
Cited
US2687304A
Cited
US4665833A
Cited
DE3133560A1
Cited
DE3300072A1
Cited
GB2176124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-12-19 | 1998-06-20 | 1998-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-19 | 2002-06-20 | 2002-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-19 | 2006-06-20 | 2006-12-20 | $7700.00 | Window Closed / Lapsed |