[특허]Power-assisted cart retriever with attenuated power output

[미국특허] Power-assisted cart retriever with attenuated power output 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B60K-001/00
출원번호	US-0947831 (2004-09-23)
등록번호	US-7389836 (2008-06-24)
발명자 / 주소	Johnson,Daniel T. Holtan,Paul D. Wiff,James W.
출원인 / 주소	Dane Industries, Inc.
대리인 / 주소	Dorsey & Whitney LLP
인용정보	피인용 횟수 : 12 인용 특허 : 62

초록 ▼

The present invention is a motorized shopping cart retriever that includes a controller that attenuates the power provided to the drive system of the retriever to prevent the retriever from being utilized to move an excessively heavy load of shopping carts. By preventing the retriever and carts from being subjected to overloaded conditions, the operational lives of the retriever and carts are maximized. The retriever is also provided with a burst mode that allows the power provided to the drive system to rapidly increase past the normal attenuated level for a brief period of time in order to reduce the time required to accelerate a retriever loaded with carts to a terminal velocity.

대표청구항 ▼

We claim: 1. A shopping cart retriever comprising: an electric motor; a drive system powered by the electric motor; a controller that controls power to the electric motor and includes a first power limit and a second power limit; and a throttle control in communication with the controller, wherein the first power limit is the controller's normal power limit that results when the controller self-limits its maximum power output through a sensing feature of the controller that exists to prevent damage to the controller, wherein the second power limit is selectable and limits the controller's maximum power output to a level that is less than that of the first power limit, and wherein the sensing feature is a temperature sensing feature that senses a temperature of the controller. 2. The retriever of claim 1, wherein the second power limit is selected to provide a power output level that optimizes the operational life of a component of the retriever or of a shopping cart. 3. The retriever of claim 1, wherein the second power limit is selected to provide a power output level that prevents the retriever from being subjected to an overload condition. 4. The retriever of claim 1, wherein the second power limit attenuates current. 5. The retriever of claim 1, wherein the second power limit attenuates voltage. 6. The retriever of claim 1, wherein the controller is an analog controller. 7. The retriever of claim 1, wherein the controller is a digital controller. 8. The retriever of claim 1, wherein the electric motor is a brushless DC motor. 9. The retriever of claim 1, wherein the electric motor is an AC motor. 10. The retriever of claim 1, wherein the electric motor is a brush DC motor. 11. The retriever of claim 10, wherein the brush DC motor is a series wound DC motor. 12. The retriever of claim 10, wherein the brush DC motor is a separately excited DC motor.

이 특허에 인용된 특허 (62) 인용/피인용 타임라인 분석

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Holtan, Paul D.; Johnson, Daniel T., Cart pulling vehicle with dual cable drums and dual torsion springs.
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Schugt William ; Dominguez Stephan, Cart retriever vehicle.
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Birkestrand Orville J. ; Box Gary ; Persson Erland, Contactless electronic control system for modular motorized wheel hub.
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Gingerich Newton Roy,CAX ITX N0B 1G0, Electric powered small tractor.
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Johnson, Daniel, Hospital bed power-assist.
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Henderson Harold (3566 Whiporwill Dr. Austin MI 48467) Henderson Larry (1933 S. Pinnebog Rd. Bad Axe MI 48413), Human power shopping cart propulsion device.
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Madwed Albert, Independently pivotable drivewheel for a wheeled chassis.
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Hamman Reed K. (Newbern TN), Integrated wheel lift wrecker.
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Avitan Isaac (Vestal NY) Allen Ralph (Greene NY) Kellogg David L. (Greene NY) Page Stephen L. (Greene NY) Radley David J. (Whitney Point NY), Lift truck control systems.
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Hancock Frank H. ; Price Stephen C. ; Craddock Kevin D., Lockable front wheel swivel for lawn mowers.
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Gordon Bernard M. ; Izrailit Iosif, Method of and apparatus for power management and distribution in a medical imaging system.
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Jonokuchi Hideki,JPX, Motor driver having a booster circuit and an inverter both controlled by pulse width modulation.
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Coy J. Robinson, Shopping cart collection vehicle and method.
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Snel Jan,NLX, Stripline filter with stripline resonators of varying distance therebetween.
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이 특허를 인용한 특허 (12) 인용/피인용 타임라인 분석

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Holtan, Paul David, Cart moving machine.
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Holtan, Paul; Dvorak, Andrew L., Cart transporting apparatus.
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Holtan, Paul D.; Wiff, James W., Hitch assembly.
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Bussinger, Allen Louis; Schultz, Jeremiah Vincent, Material handling cart.
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Hannah, Stephen E.; James, Jesse M.; Ekbote, Chandrashekhar, Monitoring usage or status of cart retrievers.
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Hannah, Stephen E.; James, Jesse M.; Ekbote, Chandrashekhar, Monitoring usage or status of cart retrievers.
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Young, Matthew E.; Greenberg, Daniel R., Power assist wagon.
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Johnson,Daniel T.; Holtan,Paul D.; Wiff,James W., Power-assisted cart retriever with attenuated power output.
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Holtan, Paul D.; Johnson, Daniel T.; Wiff, James W., Push-pull cart collection device and conversion assembly.
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Holtan, Paul David; Dvorak, Andrew L., Utility machine with dual-mode steering.
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A	생활필수품
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A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Power-assisted cart retriever with attenuated power output 원문보기