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US 4,360,224 AGranted
Tricycle with two fore wheels
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorsToshiyuki Sato, Nobuyuki Kanno
Life of this patent
Estimating the term…
Abstract
A tricycle having two spaced fore wheels and a single rear wheel connected to a frame structure. The fore wheels are connected to the frame by a longitudinally extending shaft. A double wishbone suspension comprised of a pair of upper arms and a pair of lower arms connected by vertical links at their outer ends join the fore wheels to the frame and longitudinal shaft. The upper arms are pivotally connected to the frame while the lower arms are pivotally and separately connected to the longitudinal shaft by a shock absorbing cushion.
Claims8
A tricycle comprising:
- a main frame;
- a torsion bar extending longitudinally at the forward portion of said main frame, one end of said torsion bar being connected to said main frame;
- a neidhart cushion means having a longitudinally-extending axis of rotation, rotatably mounted on said main frame, said neidhart cushion means including an inner cylinder, an outer cylinder and resilient means positioned between said inner and outer cylinders for limiting relative rotation therebetween, one of said cylinders being connected to the other end of said torsion bar;
- a lower lefthand arm having an inner end connected to one of said cylinders;
- a lower righthand arm having an inner end connected to the other of said cylinders;
- a righthand link having a lower end pivotally connected to the outer end of said lower righthand arm;
- a lefthand link having a lower end pivotally connected to the outer end of said lower lefthand arm;
- an upper lefthand arm having an outer end pivotally connected to the upper end of said lefthand link;
- an upper righthand arm having an outer end pivotally connected to the upper end of said righthand link;
- inner ends of said upper arms being pivotally connected to said main frame;
- and
- means for supporting a front wheel on each of said links, respectively.
9 more elements
Dependencies are inferred from the claim text.