Patent US2668528A successfully refreshed from Google Patents.
Patent US3867993A successfully refreshed from Google Patents.
US3867993A
Expired / Lapsed
US
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Collapsible and motorized cart
Assignee: J OSAWA AND CO Ltd
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Filing: 1973-05-24
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Granted: 1975-02-25
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Expires: 1993-05-24
Abstract
Abstract A novel collapsible and motorized cart comprising a foldable handle, a link mechanisms operatively connected said handle to open or close cart legs, link mechanisms connected to each of said cart leg to move the legs in parallel position, and independent motors to drive each cart wheel.
Inventors
- 👤 Kozaburo Iizuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:35
CPC Classifications
B; B62; B62B; B62B1/00; B62B1/02; B62B1/04; B62B1/042; B62B5/00; B62B5/0026; B62B2202/00; B62B2202/40; B62B2202/404; B62B5/0033; B62B5/0036; B62B5/004; Y; Y10; Y10S; Y10S280/00; Y10S280/05
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
270 words
A collapsible motorized cart comprising: a hollow main column; a handle having one end pivotally coupled to an uppor portion of said main column for movement of said handle to a collapsed position adjacent said main column; an elongated sliding link positioned within said main column; a driving link having one end pivotally coupled to an upper end of said sliding link, and another end pivotally coupled to said handle at a location spaced from said one end of said handle; a pair of cart wheels; a pair of DC motors, one of said motors coupled to one of said wheels and the other of said motors coupled to the other of said wheels, whereby each of said wheels is driven by an independent motor; a pair of hollow legs, each having one end pivotally coupled to a corresponding one of said wheels, and another end pivotally coupled to a lower portion of said main column so that both legs extend outwardly from one side of said main column; a pair of leg links, each positioned within a corresponding one of said hollow legs and having one end pivotally coupled to a corresponding one of said wheels and another end pivotally coupled to said lower portion of said main column; a pair of supporting arms, each having one end pivotally coupled to a lower end of said sliding link, and another end pivotally coupled to a corresponding leg at a position between the ends of said leg, whereby movement of said handle from an extended position to said collapsed position moves said legs from a spread to a closed position.
Claim 2
Dependent Claim
270 words
A collapsible motorized cart comprising: a hollow main column; a handle having one end pivotally coupled to an uppor portion of said main column for movement of said handle to a collapsed position adjacent said main column; an elongated sliding link positioned within said main column; a driving link having one end pivotally coupled to an upper end of said sliding link, and another end pivotally coupled to said handle at a location spaced from said one end of said handle; a pair of cart wheels; a pair of DC motors, one of said motors coupled to one of said wheels and the other of said motors coupled to the other of said wheels, whereby each of said wheels is driven by an independent motor; a pair of hollow legs, each having one end pivotally coupled to a corresponding one of said wheels, and another end pivotally coupled to a lower portion of said main column so that both legs extend outwardly from one side of said main column; a pair of leg links, each positioned within a corresponding one of said hollow legs and having one end pivotally coupled to a corresponding one of said wheels and another end pivotally coupled to said lower portion of said main column; a pair of supporting arms, each having one end pivotally coupled to a lower end of said sliding link, and another end pivotally coupled to a corresponding leg at a position between the ends of said leg, whereby movement of said handle from an extended position to said collapsed position moves said legs from a spread to a closed position.
Claim 3
Dependent Claim
23 words
The cart as claimed in claim 1, including bag holding means extending from the side of said main column opposite said one side.
Claim 4
Dependent Claim
34 words
The cart as claimed in claim 1, including battery mounting means on said main column between the ends of said main column for mounting a battery on said one side of said main column.
Claim 5
Dependent Claim
30 words
The cart as claimed in claim 1 including a spring loaded claw on said main column and detachably coupled to said handle to hold said handle in said extended position.
Claim 6
Dependent Claim
32 words
The cart as claimed in claim 1, wherein said handle includes adjustable positioning means adjacent said one end for adjusting the angular position of said handle with respect to said main column.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |