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US 8,857,827 B2Granted
Manually driven cart with biased-direction rear wheels
OwnerShane Cheninventor
Life of this patent
Estimating the term…
Abstract
A cart having a platform and at least one forward located non-direction biased caster wheel and two rearward located direction biased caster wheels. A second forward located non-direction biased caster wheel may be provided. Various cart types are disclosed including lumber, flatbed, nursery, utility and luggage carts. An embodiment for converting between biased direction and non-biased direction rear wheels is also disclosed.
Claims17
A manually propelled cart device, comprising:
- a platform frame;
- first and second non-direction biased caster wheels coupled to the platform frame towards a front thereof;
- third and fourth direction biased caster wheels coupled to the platform frame towards a rear thereof;
- a non-steering wheel coupled control frame extending upwardly from the platform frame and configured to be contacted by the hand of a user during use to steer and propel the cart;
- and
- wherein the control frame is coupled toward the rear of the platform frame proximate the direction biased wheels and ascends there above so that a user has ready leverage over the direction biased wheels to maneuver those wheels, and thereby the cart device, sideway;
- wherein the direction biased caster wheels have a sufficient turning range while under the bias that the cart device can roll primarily sideways relative to a straight forward line of travel, when moved in that direction via the control frame;
- and
- wherein at least one of the third and fourth direction biased caster wheels is direction biased due to a forward tilting of the caster wheel, and the forward tilting of the caster arrangement is at an angle in the range of 3 to 40 degrees.
6 more elements
A manually propelled cart device, comprising:
- a platform frame;
- a first non-direction biased caster wheel coupled to the platform frame towards a front thereof;
- a first and a second direction biased caster wheels coupled to the platform frame towards a rear thereof;
- a non-steering wheel coupled control member ascending from the platform frame and connected to the platform frame at least at a rear portion thereof;
- wherein the biased direction caster wheels are biased due to:
- a forward tilting of the caster wheel;
- and
- wherein the direction biased caster wheels have a sufficient turning range while under the bias that the cart device can roll primarily sideways relative to a straight forward line of travel.
5 more elements
A manually propelled cart device, comprising:
- a platform frame;
- a first non-direction biased caster wheel coupled to the platform frame towards a front thereof;
- third and fourth direction biased caster wheels coupled to the platform frame towards a rear thereof, at least one of the third and fourth direction biased caster wheels being direction biased due to a forward tilting of the caster wheel;
- a control member extending upwardly from the platform frame and configured to be contacted by the hand of a user during use to steer and propel the cart;
- and
- wherein the control member is coupled toward the rear of the platform frame proximate the direction biased wheels and ascends there above so that a user has ready leverage over the direction biased wheels to maneuver those wheels, and thereby the cart device, sideways;
- wherein the direction biased caster wheels have a sufficient turning range under the bias that the cart device can roll primarily sideways relative to a straight forward line of travel, when moved in that direction via the control member;
- wherein the control member includes a trigger handle and a linkage mechanism, the linkage mechanism coupled between the trigger handle and the third and fourth caster wheels, and
- wherein the trigger handle, linkage mechanism and third and fourth caster wheels are configured such that movement of the trigger handle causes the linkage mechanism to move the third and fourth caster wheels between a direction biased arrangement and a substantially non-direction biased arrangement.
6 more elements
Dependencies are inferred from the claim text.