Land vehicles – Wheeled – Occupant propelled type
Reexamination Certificate
2011-07-19
2011-07-19
Phan, Hau V (Department: 3618)
Land vehicles
Wheeled
Occupant propelled type
C280S221000, C280S087010, C280S087041
Reexamination Certificate
active
07980578
ABSTRACT:
An application for a device for human conveyance includes a front wheel and a rear wheel. The rear wheel interfaced to a sprocket through a ratchet drive system which allows forward rotation of the rear wheel in response to forward rotation of the sprocket and allows free backward rotation of the sprocket. A frame interfaces the front wheel to the rear wheel keeping the front wheel at a constant distance from the rear wheel. The front and rear wheels are rotatably interfaced to the frame. A front end of an arc-shaped spring is affixed to the frame in proximity to the front wheel and a rear end of the arc-shaped spring has a sprocket gear interfaced to the sprocket whereas depression of the arc-shaped spring pushes the rear-end of the arc-shaped spring in a rearward direction with respect to the rear wheel and the sprocket gear turns the sprocket in a forward rotational direction.
REFERENCES:
patent: 942333 (1909-12-01), Lennox
patent: 2076804 (1937-04-01), Winding
patent: 2723131 (1955-11-01), McChesney, Jr.
patent: 3362723 (1968-01-01), Bretholz
patent: 3415540 (1968-12-01), Portnoff
patent: 4775162 (1988-10-01), Chao
patent: 5224724 (1993-07-01), Greenwood
patent: 6334838 (2002-01-01), Lee
patent: 6375208 (2002-04-01), Lee
patent: 6572128 (2003-06-01), Graf
patent: 6688624 (2004-02-01), Christensen et al.
patent: 6808188 (2004-10-01), Fan
patent: 7044488 (2006-05-01), Hamend
patent: 7793956 (2010-09-01), Hsu
patent: 2002/0096848 (2002-07-01), Wei et al.
patent: 2002/0158440 (2002-10-01), Graf
patent: 2002/0163159 (2002-11-01), Christensen et al.
patent: 2005/0062253 (2005-03-01), Osher
patent: 2008/0088109 (2008-04-01), Chiu et al.
patent: 10 2004 029227 (2006-01-01), None
patent: 10 2005 033829 (2007-01-01), None
patent: 20-0306899 (2003-03-01), None
patent: 20-0345647 (2004-03-01), None
patent: WO 2004-056647 (2004-07-01), None
Miller Christopher Phillip
Prior Gregory R.
Larson & Larson P.A.
Liebenow Frank
Miller Justin
Mindworks Holdings, LLC
Olszewski John R
LandOfFree
Device of human conveyance does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device of human conveyance, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device of human conveyance will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2696148