IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0153568
(2005-06-14)
|
등록번호 |
US-7306244
(2007-12-11)
|
발명자
/ 주소 |
- Roseman,Bruce
- Goldman,Wayne
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
12 |
초록
There is provided a transportation device with outer and inner frames coupled to a receptacle so as to allow the receptacle to move vertically in response to loading and unloading of the device.
대표청구항
▼
What is claimed is: 1. The transportation device for transporting a load, comprising: an outer frame operative to move along an external surface; an inner frame removably mounted to the outer frame so that the outer and inner frames are operative to move relative to one another transversely to the
What is claimed is: 1. The transportation device for transporting a load, comprising: an outer frame operative to move along an external surface; an inner frame removably mounted to the outer frame so that the outer and inner frames are operative to move relative to one another transversely to the surface; a receptacle coupled to the inner and outer frames and operative to move with the inner frame in response to a mass of the load carried by the receptacle, wherein the outer and inner frame are configured to minimize at least a torsion force produced by the load during transportation, loading and unloading of the receptacle; the outer frame being provided with spaced apart first and second elongated sections extending at least in part along upper and lower substantially planes, respectively; a third section extending substantially vertically between the first and second sections; and the first section provided with an opening configured to receive the receptacle, the third section being provided with a plurality of spaced apart guiding surfaces configured to slidably guide the inner frame between the first and second sections of the outer frame upon receiving and removing the load in and from the receptacle. 2. The transportation device of claim 1 further comprising a biasing assembly coupled between the first and second sections of the outer frame, the inner frame being provided with two uprights each biased upwardly by the biasing assembly, and a pair of cross-bars coupling the two uprights and configured to support the bottom of the receptacle for simultaneous displacement therewith during displacement of the load into and out of the receptacle. 3. The transportation device of claim 2, wherein the two uprights each have a respective substantially U-shaped cross-section provided with an axially extending member and two flanks extending from opposite axial ends of the axially extending member downwardly towards the second section of the outer frame upon mounting of the inner frame to the outer frame, the axially extending members being resiliently supported by the biasing assembly, the two flanks being configured to slide along the guiding surfaces of the third section of the outer frame between the first and second sections thereof in response to displacement of the load into and out of the receptacle. 4. The transporting device of claim 3, wherein the flanks of the inner frame each have a respective roller unit rotatably guided along a respective one of the guiding surfaces of the third section of the outer frame, the biasing assembly including a plurality of poles each supporting a respective resilient element, the resilient elements each being braced between a respective one of the axially extending member of the inner frame and the second section of the outer frame. 5. The transportation device of claim 4, wherein the resilient elements of the biasing assembly are selected so as to distribute mass of the load, carried by the receptacle, substantially uniformly there between so as to minimize deviation of the receptacle from a substantially horizontal plane during displacement of the receptacle between the first and second sections of the outer frame. 6. The transportation device of claim 5, wherein the resilient elements of the biasing assembly each include a respective at least one spring provided with a uniform or various rate. 7. The transportation device of claim 5, wherein the resilient elements of the biasing assembly each include a respective plurality of springs coupled in succession with one another and provided with various spring rates. 8. The transportation device of claim 4, wherein the third section of the outer frame includes a plurality of spaced apart bars each provided with a respective one of the guiding surfaces, the respective roller unit of the inner frame includes an upper pair of first and second rollers and a lower pair of first and second rollers, the first and second rollers of each pair diverging from one another so as to slide along the respective one of the guiding surfaces. 9. The transportation device of claim 2, wherein the crossbars of the inner frame each have a respective U-shaped cross section including a pair of spaced elongated beams extending transversely to the longitudinal axes of the first and second sections of the outer frame and spanning midsections of the two uprights of the inner frame, and a pair of vertically extending beams each extending upwards from opposite ends of a respective one of the elongated beams and coupled to a respective one of the uprights of the inner frame, the inner frame further including at least one reinforcing beam extending between and coupling the pair of spaced elongated beams of the crossbars. 10. The transportation device of claim 1, wherein at least the first section includes two axially extending elongated elements and two opposite cross elements bridging proximal and distal ends of the two elongated elements, respectively, the second section being configured to coextend with the first section and having a proximate portion thereof defining a space for receiving a distal portion of a subsequent transportation device, so that the transportation devices are operative to interfit with one another when not in use. 11. The transportation device of claim 10 further comprising a wheel assembly coupled to the second section of the outer frame and operative to rotate about horizontal and vertical axes so as to displace the transportation device in response to a force applied by a device user in all directions, and a brake assembly extending between proximal portions of the first and second sections of the outer frame and operative to release the wheel assembly upon applying an external force by a device user and to arrest displacement of the wheel assembly upon seizing the external force. 12. The transportation device of claim 11, wherein the wheel assembly includes a pair of proximal wheels and a pair of distal wheels, the brake assembly includes: an actuator mounted to a proximate portion of the first section of the outer frame and pivotal between a transporting position upon applying the external force to the actuator and brake position upon removing the external force, a pair of rods each coupled to the actuator and extending towards a respective one of proximal wheels, a pair of brake pads each coupled to a respective one of the pair of rods and configured to abut an upper segment of the respective proximal wheels so as to arrest displacement thereof upon removing the external force from the actuator and releasing the proximal wheels upon applying the external force t he actuator, and a pair of biasing units each mounted on the respective rod and coupled between the actuator and a respective one of the pair of brake pads so as to bias the respective brake pad against the upper segment of the proximal wheels. 13. The transportation device of claim 12, wherein the brake assembly includes a pair of housings brackets each encasing the respective brake pad, a respective one of the biasing units and a stop all centered on a respective one of the pair of rods, each of the biasing units being braced between the brake pad and the stop. 14. The transportation device of claim 10 further comprising a handle fixedly coupled to or removably coupled to the proximal ends of the two elongated elements of the first section of the outer frame, the handle being ergonomically configured to provide a comfortable grip for a device user. 15. The transportation device of claim 1, wherein the receptacle includes an open top coupled to the outer frame, a bottom tray coupled to the inner frame and a peripheral wall configured to provide displacement of the bottom of the receptacle relative to the open top thereof upon displacing the load into and out of the receptacle. 16. The transportation device of claim 15, wherein the peripheral wall of receptacle is made from material capable of expanding and contracting as the inner frame moves downwardly and upwardly, respectively, upon displacing the load into and out of the receptacle. 17. The transportation device of claim 1, further comprising a seat configured to receive a child and pivotally mounted to the outer frame to rotate outwardly from and inwardly into the receptacle upon applying an external force by a device user. 18. The transportation device of claim 17, wherein the outer frame is provided with a stop element preventing uncontrollable pivoting of the seat out of the receptacle. 19. A transportation device for transporting a load, comprising: an outer frame operative to move along a surface and having an opening; said outer frame including spaced apart first and a second sections; a receptacle suspended on the outer frame within the opening and movable relative to said first and said second sections; and means for absorbing a shock generated by a mass of a load displaceable into and out of the receptacle, means for minimizing torsional forces produced by the load; said means for minimizing torsional forces, further comprising: spaced apart guiding surfaces extending from said outer frame between said first and said second sections and engaging said receptacle enabling a slidable guiding of said receptacle relative to said first and second sections.
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