US6196566B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lightweight folding bicycle
Assignee: Individual
•
Filing: 1999-06-04
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Granted: 2001-03-06
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Expires: 2019-06-04
Abstract
Abstract This lightweight folding bicycle adopts the four-bar-linkage-folding-frame. Two diagonal-bar-hinges are added. Each diagonal-bar-hinge is made up of two parts. One end of the diagonal-bar-hinge hinge joints in the middle of a seat tube at the same point as a standing tube hinged, the other end of the diagonal-bar-hinge joints in the middle of a crossbar at the same point as a down tube hinged. There is a four-bar-linkage-speed-folding-fastener on a handlebar stem and a folding device on the pedal. This type of folding bike is of simple structure, reasonable design and easy to fold. The four-bar-linkage-speed-folding-fastener grips a large area, which can press half the circle as maximum, so as to enlarge the suffering area and balance the received force. It is easy and quick to fold the bike and safe to drive.
Inventors
- 👤 Guanli Zhang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:19
CPC Classifications
B; B62; B62K; B62K15/00; B62K15/006; B62K15/008
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
289 words
A lightweight folding bicycle, in which a frame connects front and back wheels through a driving system, a handlebar is fixed on a front of a crossbar ( 5 ) by a handlebar stem ( 31 ), the driving system links with a pedal ( 10 ) through a crank ( 8 ), a saddle is fitted on a top end of a seat tube ( 1 ) and a bottom end of the seat tube hinge joints with a tail end of the crossbar ( 5 ) while this tail end joints left and right hinge points of a back fork ( 6 ), opposite ends of the back fork ( 6 ) joints a cross fork ( 7 ) and opposite ends of the cross fork ( 7 ) joints an end of two standing tubes ( 3 ) at the same point as one end of a down tube ( 4 ), opposite ends of the two standing tubes ( 3 ) joint in a middle of the seat tube ( 1 ) and opposite ends of the down tube ( 4 ) hinges in a middle of the crossbar ( 5 ); wherein a diagonal-bar-hinge ( 2 ) is added and made up of two parts which are hinged together at opposing ends, an upper end of the diagonal-bar-hinge ( 2 ) joints in the middle of the seat tube ( 1 ) at the same point as the standing tube ( 3 ) hinged and a lower end of the diagonal-bar-hinge ( 2 ) joints in the middle of the crossbar ( 5 ) at the same point as the down tube ( 4 ), the diagonal-bar-hinge ( 2 ) has a spacing structure.
Claim 2
Dependent Claim
289 words
A lightweight folding bicycle, in which a frame connects front and back wheels through a driving system, a handlebar is fixed on a front of a crossbar ( 5 ) by a handlebar stem ( 31 ), the driving system links with a pedal ( 10 ) through a crank ( 8 ), a saddle is fitted on a top end of a seat tube ( 1 ) and a bottom end of the seat tube hinge joints with a tail end of the crossbar ( 5 ) while this tail end joints left and right hinge points of a back fork ( 6 ), opposite ends of the back fork ( 6 ) joints a cross fork ( 7 ) and opposite ends of the cross fork ( 7 ) joints an end of two standing tubes ( 3 ) at the same point as one end of a down tube ( 4 ), opposite ends of the two standing tubes ( 3 ) joint in a middle of the seat tube ( 1 ) and opposite ends of the down tube ( 4 ) hinges in a middle of the crossbar ( 5 ); wherein a diagonal-bar-hinge ( 2 ) is added and made up of two parts which are hinged together at opposing ends, an upper end of the diagonal-bar-hinge ( 2 ) joints in the middle of the seat tube ( 1 ) at the same point as the standing tube ( 3 ) hinged and a lower end of the diagonal-bar-hinge ( 2 ) joints in the middle of the crossbar ( 5 ) at the same point as the down tube ( 4 ), the diagonal-bar-hinge ( 2 ) has a spacing structure.
Claim 3
Dependent Claim
247 words
A lightweight folding bicycle according to claim 1 , wherein a four-bar-linkage-speed-folding-fastener ( 9 ) is installed between a bottom end of the handlebar stem ( 31 ) and a fork column at a head of the crossbar ( 5 ), an upper hinge ( 11 ) and a lower hinge ( 13 ) of the fastener ( 9 ) are respectively fixedly joined with two ends of the handlebar stem ( 31 ), these two hinges are movable joined through a long pin axle ( 19 ), there is a notch in one side of the lower hinge ( 13 ) where an adjustable nut ( 15 ) joints movably, a concave buckle ( 12 ) couples with the lower hinge through a pin ( 14 ) at one end and hinges with one end of a slot at an opposite end of the concave buckle ( 16 ) through a pin, a cross section shape of the concave buckle ( 12 ) is in a form of an arc, a width of the slot ( 16 ) is bigger than a height of the notch, an opposite end of the slot ( 16 ) joints a supporting pole ( 18 ) movably, one end of an adjustable screw ( 17 ) joints a hole inside the supporting pole ( 18 ) movably, and an opposite end of the adjustable screw ( 17 ) connects with the adjustable nut ( 15 ) through a screw thread.
Claim 4
Dependent Claim
205 words
A lightweight folding bicycle according to claim 2 , wherein the pedal ( 10 ) is collapsible, a rack ( 20 ) hinges with a fixing spindle ( 24 ) through a pin ( 21 ), there is a boss ( 25 ) in a middle of a fixing pole ( 22 ) and in a first side of the boss ( 25 ) there is a hole with a screw thread, a compression spring ( 23 ) covers an outer of the fixing pole ( 22 ) and presses on the boss ( 25 ), an outer surface diameter of the boss ( 25 ) is bigger than a diameter of the compressor spring ( 23 ), an engagement between the boss ( 25 ) and an inside diameter of the fixing spindle ( 24 ) is a sliding fit, a second side of the boss ( 25 ) of the fixing pole ( 22 ) inserts into an inner hole of the rack ( 20 ) and the first side of the fixing pole is threadably connected with the pedal ( 10 ), the rack ( 20 ) connects with the crank ( 8 ) of the driving system through a threaded connection.
Claim 5
Dependent Claim
207 words
A lightweight folding bicycle according to claim 1 , wherein the pedal ( 10 ) is collapsible, in which a rack ( 20 ) hinges with a fixing spindle ( 24 ) through a pin ( 21 ), there is a boss ( 25 ) in a middle of a fixing pole ( 22 ) and in a first side of the boss ( 25 ) there is a hole with a screw thread, a compression spring ( 23 ) covers an outer surface of the fixing pole ( 22 ) and presses on the boss ( 25 ), an outside diameter of the boss ( 25 ) is bigger than a diameter of the compression spring ( 23 ), an engagement between the boss ( 25 ) and an inside diameter of the fixing spindle ( 24 ) is a sliding fit, a second side of the boss ( 25 ) of the fixing pole ( 22 ) inserts into an inner hole of the rack ( 20 ) and the first side of the fixing pole is threadably connected with the pedal ( 10 ), the rack ( 20 ) connects with the crank ( 8 ) of the driving system through a threaded connection.
Claim 6
Dependent Claim
30 words
A lightweight folding bicycle according to claim 1 , wherein there is a folding side on an opposing hinged end of the diagonal-bar-hinge ( 2 ) to restrict the frame.
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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) | 2004-03-05 | 2004-09-04 | 2005-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-03-05 | 2008-09-04 | 2009-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-03-05 | 2012-09-04 | 2013-03-06 | $7700.00 | Window Closed / Lapsed |