[특허]Shopping cart with folding legs

Beauchamp, Brenda Jo

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Shopping cart with folding legs

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B62B-003/02 B62B-005/00
출원번호	US-0128912 (2012-06-21)
등록번호	US-9211899 (2015-12-15)
국제출원번호	PCT/US2012/043587 (2012-06-21)
§371/§102 date	20140627 (20140627)
국제공개번호	WO2013/191700 (2013-12-27)
발명자 / 주소	Beauchamp, Brenda Jo Hill, Kenneth Roy
출원인 / 주소	Beauchamp, Brenda Jo
대리인 / 주소	Lindsay, John
인용정보	피인용 횟수 : 5 인용 특허 : 12

초록
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A four-wheel shopping cart includes a substantially rectangular base surrounded by vertical side, front and rear walls to form an open-topped, cargo basket. The front wall opens fully to provide access to the cargo area, while the rear wall is shorter than the others to allow easy access from behind while shopping. A transverse axle mounted below the rear wall supports hinged legs that fold upwards alongside the side walls so the cart can be placed conveniently into a vehicle for transportation. The legs unfold and lock to support the cart on castors for shopping, and may include height adjustment means for lowering the basket to a comfortable level for usage and for raising it to place it into the shopper's vehicle. A pair of small, adjustable wheels mounted on opposite front corners of the base pivot partially to facilitate maneuvering the cart within the vehicle.

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1. An improved shopping cart comprising a cargo basket having a floor panel having side edges disposed parallel to and on opposite sides of a longitudinal axis and extending between transverse front and rear edges;basket walls disposed atop said floor panel and extending upward therefrom to surround and define an interior cargo space;a transverse leg axle coupled to said floor panel adjacent said rear edge;two collapsible legs coupled to said leg axle and adapted to articulate between a folded position alongside said basket walls and an extended position disposed below said floor panel, wherein each of said collapsible legs further comprises a mast rotatably coupled to one end of said leg axle;a footer coupled to said mast at a mast end distal said leg axle;castors disposed on opposite ends of said footer; andreleasable locking means disposed between said footer and said mast for locking said footer into a predetermined angle relative to said mast, wherein said releasable locking means comprises a latch coupled between said footer and said mast and surrounding and defining a notch;a latch lever bearing a latch pin and coupled by its proximate end to said latch and adapted to articulate between an unlocked position with its distal end disposed atop said footer and a locked position with its distal end a spaced distance above said footer and said latch pin engaging said notch; anda keeper disposed on an end of said latch lever distal said latch and adapted alternately to release said latch lever and to retain said latch lever in said locked position. 2. The improved shopping cart of claim 1 and further comprising a damper coupled between said footer and said mast and adapted to slow rotation of said footer relative to said mast when said latch pin disengages said notch. 3. An improved shopping cart comprising a cargo basket having a floor panel having side edges disposed parallel to and on opposite sides of a longitudinal axis and extending between transverse front and rear edges;basket walls disposed atop said floor panel and extending upward therefrom to surround and define an interior cargo space;a transverse leg axle coupled to said floor panel adjacent said rear edge;two collapsible legs coupled to said leg axle and adapted to articulate between a folded position alongside said basket walls and an extended position disposed below said floor panel, wherein each of said collapsible legs further comprises a mast rotatably coupled to one end of said leg axle;a footer coupled to said mast at a mast end distal said leg axle;castors disposed on opposite ends of said footer; andreleasable locking means disposed between said footer and said mast for locking said footer into a predetermined angle relative to said mast;two coiled springs, one each surrounding and coupled to opposite ends of said leg axle and including a finger protruding tangent to said leg axle a spaced distance;two gussets coupled to said floor panel and extending longitudinally rearward from said rear edge to terminate adjacent an end of said leg axle, each of said gussets bearing a transverse detent; anda limit arm coupled to each said masts adjacent said gussets and adapted alternately to engage said detent when said collapsible leg is in said folded position and one of said fingers when said collapsible leg is in said extended position. 4. An improved shopping cart comprising a cargo basket having a floor panel having side edges disposed parallel to and on opposite sides of a longitudinal axis and extending between transverse front and rear edges;basket walls disposed atop said floor panel and extending upward therefrom to surround and define an interior cargo space;a transverse leg axle coupled to said floor panel adjacent said rear edge;two collapsible legs coupled to said leg axle and adapted to articulate between a folded position alongside said basket walls and an extended position disposed below said floor panel, wherein each of said collapsible legs further comprises a mast rotatably coupled to one end of said leg axle;a footer coupled to said mast at a mast end distal said leg axle;castors disposed on opposite ends of said footer; andreleasable locking means disposed between said footer and said mast for locking said footer into a predetermined angle relative to said mast;height adjustment means disposed within said masts for adjusting a height of said cargo basket relative to said footer, wherein said height adjustment means comprises a mast extension coupled between said mast and said leg axle and telescopically cooperating with said mast;a worm gear coupled between said mast extension and said mast;a motor disposed on said mast and coupled to said worm gear, said motor adapted to turn said worm gear to retract and extend said mast extension telescopically into and out of said mast; and control means coupled to said motor for controlling and operating said motor. 5. The improved shopping cart of claim 4 wherein said control means comprises a cowling surrounding and disposed above said leg axle;at least one battery disposed on said cowling;electric leads coupled between said at least one battery and said motor; anda reversing switch disposed on said cowling and electrically connected within said electric leads between said motor and said at least one battery. 6. An improved shopping cart comprising a cargo basket having a floor panel having side edges disposed parallel to and on opposite sides of a longitudinal axis and extending between transverse front and rear edges;basket walls disposed atop said floor panel and extending upward therefrom to surround and define an interior cargo space;a transverse leg axle coupled to said floor panel adjacent said rear edge;two collapsible legs coupled to said leg axle and adapted to articulate between a folded position alongside said basket walls and an extended position disposed below said floor panel;a plurality of maneuvering wheels coupled to said floor panel and extending below said floor panel to support said cargo basket when said collapsible wheels are in said folded position;a pivot bracket coupled between at least two of said plurality of maneuvering wheels and said floor panel, said pivot bracket adapted to articulate between a maneuvering position and a standby position;a control lever coupled to said cargo basket and adapted to articulate between a first lever position corresponding to said maneuvering position and a second lever position corresponding to said standby position;a cable coupled between said control lever and each of said pivot brackets; anda return spring coupled to each of said pivot brackets and adapted to urge said pivot bracket into said standby position. 7. An improved shopping cart comprising a cargo basket having a floor panel having side edges disposed parallel to and on opposite sides of a longitudinal axis and extending between transverse front and rear edges;basket walls disposed atop said floor panel and extending upward therefrom to surround and define an interior cargo space;a transverse leg axle coupled to said floor panel adjacent said rear edge;two collapsible legs coupled to said leg axle and adapted to articulate between a folded position alongside said basket walls and an extended position disposed below said floor panel;prop means disposed on said floor panel adjacent said rear edge for propping said cargo basket against a portion of a vehicle, wherein said prop means comprisesa substantially rectangular yoke disposed parallel to said rear edge and hingedly coupled thereto on each end of said yoke by an elbow, said yoke and said elbow adapted to articulate between a retracted prop position adjacent said basket walls and an extended prop position;adjustable arms coupled between said elbow and said yoke; andspring clamps coupled to said elbow and adapted to hold said yoke in said retracted prop position. 8. An improved shopping cart comprising a cargo basket having a floor panel having side edges disposed parallel to and on opposite sides of a longitudinal axis and extending between transverse front and rear edges;basket walls disposed atop said floor panel and extending upward therefrom to surround and define an interior cargo space; a transverse leg axle coupled to said floor panel adjacent said rear edge;maneuvering wheels coupled to said floor panel; andan adjustable prop disposed on said floor panel adjacent said rear edge and adapted to articulate between a retracted position adjacent said basket walls and a propping position extending below said floor panel; andtwo collapsible legs coupled to said leg axle and adapted to articulate between a folded position and an extended position, each of said collapsible legs having a mast coupled by its proximate end to one end of said leg axle and having a mast extension coupled between said mast and said leg axle;a motor coupled between said mast extension said mast, said motor adapted to retract and extend said mast extension telescopically into and out of said mast; anda footer coupled to a mast end distal said leg axle, said footer having castors disposed on opposite ends of said footer;a latch disposed between said footer and said mast, said latch having; a latch lever coupled to said latch and adapted to release said latch; anda keeper disposed on an end of said latch lever distal said latch and adapted alternately to release said latch lever and to retain said latch lever in a locked position. 9. An improved method of transporting a collection of small objects from a first storage site having a plurality of small object storage locations to a second storage site, the improved method comprising providing a shopping cart having cargo basket having a floor panel having longitudinal side edges extending between transverse front and rear edges;basket walls extending upward from said floor panel to surround and define an interior cargo space; anda transverse leg axle coupled to said floor panel adjacent said rear edge;two collabsible legs coupled to said cargo basket and adapted to articulate between a folded position and an extended position, each of said collapsible legs having a mast coupled by a proximate mast end to said floor panel, said mast further having a mast extension coupled between said mast and said floor panel; and a motor coupled to said mast extension and adapted to retract and extend said mast extension telescopically into and out of said mast; anda footer coupled to a mast end distal said floor panel;providing a vehicle having a cargo compartment having a cargo compartment floor and a cargo compartment opening; thenselecting said collection of small objects from said plurality of small object storage locations and placing said small objects into said interior cargo space; thenpositioning said shopping cart at said vehicle adjacent said cargo compartment; thenurging said cargo basket through said cargo compartment opening at least partially into said cargo compartment and supported by said cargo compartment floor with said masts abutting said cargo compartment opening; thencollapsing said collapsible legs into said folded position; thenmoving said cargo basket fully into said cargo compartment; thentransporting said vehicle to a parking location adjacent said second storage site; thenextracting said cargo basket through said cargo compartment opening until said collapsible legs can be extended; thenarticulating said collapsible legs into said extended position; thenwheeling said shopping cart from said vehicle to said second storage site; thenunloading said small objects from said cargo basket into said second storage site. 10. The improved method of claim 9 and further comprising the steps of providing a plurality of maneuvering wheels pivotally coupled to said floor panel;providing an adjustment lever disposed on said cargo basket edge and coupled to at least two of said plurality maneuvering wheels; then, as part of said urging step, assuring that at least two of said maneuvering wheels rest upon said cargo space floor; and then, as part of said moving step, rotating said adjustment lever to reposition said at least two maneuvering wheels into a maneuvering position; thenpushing said cargo basket transversely to roll said cargo basket upon said maneuvering wheels until said cargo basket rotates to fit within said cargo compartment.

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Shopping cart with folding legs

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