Patent US3655212A successfully refreshed from Google Patents.
US3655212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-supporting cart
Assignee: Individual
•
Filing: 1970-04-13
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Granted: 1972-04-11
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Expires: 1990-04-13
Abstract
Abstract A self-supporting cart includes a base frame carrying a front pair of laterally spaced roller means and a rear pair of laterally spaced roller means, and a load-receiving frame pivoted to the front end portion of the base frame. The bottom ends of a pair of elongated bracing members are pivotably connected to the rear end of the base frame and the upper ends thereof are pivotably connected to a pair of slide members slidable along the load-receiving frame. A pair of retractable pins operated by a pair of squeeze handles selectively lock the slide members in any one of a number of different positions along the load-receiving frame. The base frame has a U-shaped configuration opening to the rear of the cart.
Inventors
- 👤 Morton Krass
- 👤 Walter Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:59
CPC Classifications
B; B62; B62B; B62B3/00; B62B3/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
413 words
A self-supporting cart for handling cartons and the like, said cart comprising: base frame means carrying a pair of widely laterally spaced front roller means at the front end portion of said base frame means permitting the cart to be tilted forwardly during loading and unloading thereof and at least one rear roller means at the rear end portion of said base frame means where at least three points of rolling support are provided for the cart, load-receiving frame means pivotally mounted at the front end portion of said base frame means for fore and aft movement so the angle of inclination thereof is adjustable, said load-receiving frame means including a forwardly extending foot portion for engaging the initially bottom end of a load to be carried and an upwardly and rearwardly inclining backing portion forming a backing support for the load, bracing frame means pivotally connected to the rear end portion of said base frame means and said backing portion of said load-receiving frame means, slide connection means to which one of the ends of said bracing means are connected, said slide connection means being slidable forwardly and rearwardly along said backing portion so the connection between said backing portion and said bracing frame means can be maintained with the variation in the angle of said backing portion of the load-receiving frame means, and manually releasable locking means for selectively locking the bracing frame means and backing portions of said load-receiving frame means in any of a number of relative angular positions thereof, said manually releasable locking means being mounted for bodily movement with said slide connection means and including a pair of handles spaced so close so as to be grasped by a single hand of the user and each independently controlling a separate locking element urged into a locking position within said backing portion so both handles must be operated to release both locking elements to enable the angle of said backing portion and bracing frame means to vary by pulling or pushing on said handle means, said various frame means being of a size and construction to permit the user to be centered behind the frame to said backing portion of the load-receiving frame means and to grasp the handles as he tilts the cart forwardly on said pair of front roller means to raise the rear end of the cart during loading and unloading of the cart and as the tilted cart is lowered from a tilted position.
Claim 2
Dependent Claim
413 words
A self-supporting cart for handling cartons and the like, said cart comprising: base frame means carrying a pair of widely laterally spaced front roller means at the front end portion of said base frame means permitting the cart to be tilted forwardly during loading and unloading thereof and at least one rear roller means at the rear end portion of said base frame means where at least three points of rolling support are provided for the cart, load-receiving frame means pivotally mounted at the front end portion of said base frame means for fore and aft movement so the angle of inclination thereof is adjustable, said load-receiving frame means including a forwardly extending foot portion for engaging the initially bottom end of a load to be carried and an upwardly and rearwardly inclining backing portion forming a backing support for the load, bracing frame means pivotally connected to the rear end portion of said base frame means and said backing portion of said load-receiving frame means, slide connection means to which one of the ends of said bracing means are connected, said slide connection means being slidable forwardly and rearwardly along said backing portion so the connection between said backing portion and said bracing frame means can be maintained with the variation in the angle of said backing portion of the load-receiving frame means, and manually releasable locking means for selectively locking the bracing frame means and backing portions of said load-receiving frame means in any of a number of relative angular positions thereof, said manually releasable locking means being mounted for bodily movement with said slide connection means and including a pair of handles spaced so close so as to be grasped by a single hand of the user and each independently controlling a separate locking element urged into a locking position within said backing portion so both handles must be operated to release both locking elements to enable the angle of said backing portion and bracing frame means to vary by pulling or pushing on said handle means, said various frame means being of a size and construction to permit the user to be centered behind the frame to said backing portion of the load-receiving frame means and to grasp the handles as he tilts the cart forwardly on said pair of front roller means to raise the rear end of the cart during loading and unloading of the cart and as the tilted cart is lowered from a tilted position.
Claim 3
Dependent Claim
342 words
A self-supporting cart for handling cartons and the like, said cart comprising: base frame means carrying a pair of widely laterally spaced front roller means at the front end portion of said base frame means permitting the cart to be tilted forwardly during loading and unloading thereof and at least one rear roller means at the rear end portion of said base frame means where at least three points of rolling support are provided for the cart, load-receiving frame means pivotally mounted at the front end portion of said base frame means for fore and aft movement so the angle of inclination thereof is adjustable, said load-receiving frame means including a forwardly extending foot portion for engaging the initially bottom end of a load to be carried and an upwardly and rearwardly inclining backing portion forming a backing support for the load, bracing frame means connected between the rear end portion of said base frame means and said backing portion of said load-receiving frame means, said bracing frame means being pivotally supported at the opposite ends thereof so the angle thereof is variable relative to both said base frame means and said backing portion of said load-receiving frame means and being adjustable so the connection between said backing portion and said bracing frame means can be maintained with the variation in the angle of said backing portion of the load-receiving frame means, and manually releasable locking means for selectively locking the bracing frame means and backing portion of said load-receiving frame means in any of a number of relative angular positions thereof, said manually releasable locking means including handle-forming means for releasing the locking means where operated, said handle-forming means being carried by one of said backing portion of said load-receiving frame and bracing frame means and being bodily rotatable about a horizontal axis extending transversely with respect to the same so they can be grasped and operated with the hand being in about the same angular position for the varying angular positions of the portion of the cart carrying the same.
Claim 4
Dependent Claim
342 words
A self-supporting cart for handling cartons and the like, said cart comprising: base frame means carrying a pair of widely laterally spaced front roller means at the front end portion of said base frame means permitting the cart to be tilted forwardly during loading and unloading thereof and at least one rear roller means at the rear end portion of said base frame means where at least three points of rolling support are provided for the cart, load-receiving frame means pivotally mounted at the front end portion of said base frame means for fore and aft movement so the angle of inclination thereof is adjustable, said load-receiving frame means including a forwardly extending foot portion for engaging the initially bottom end of a load to be carried and an upwardly and rearwardly inclining backing portion forming a backing support for the load, bracing frame means connected between the rear end portion of said base frame means and said backing portion of said load-receiving frame means, said bracing frame means being pivotally supported at the opposite ends thereof so the angle thereof is variable relative to both said base frame means and said backing portion of said load-receiving frame means and being adjustable so the connection between said backing portion and said bracing frame means can be maintained with the variation in the angle of said backing portion of the load-receiving frame means, and manually releasable locking means for selectively locking the bracing frame means and backing portion of said load-receiving frame means in any of a number of relative angular positions thereof, said manually releasable locking means including handle-forming means for releasing the locking means where operated, said handle-forming means being carried by one of said backing portion of said load-receiving frame and bracing frame means and being bodily rotatable about a horizontal axis extending transversely with respect to the same so they can be grasped and operated with the hand being in about the same angular position for the varying angular positions of the portion of the cart carrying the same.
Claim 5
Dependent Claim
32 words
The self-supporting cart of claim 2 wherein said handle-forming means are a pair of spaced handles to be grasped and squeezed by one hand of the user to release said locking means.
Claim 6
Dependent Claim
360 words
A self-supporting cart for handling cartons and the like, said cart comprising: base frame means carrying a pair of widely laterally spaced front roller means at the front end portion of said base frame means permitting the cart to be tilted forwardly during loading and unloading thereof and at least one rear roller means at the rear end portion of said base frame means where at least three points of rolling support are provided for the cart, load-receiving frame means pivotally mounted at the front end portion of said base frame means for fore and aft movement so the angle of inclination thereof is adjustable, said load-receiving frame means including a forwardly extending foot portion for engaging the initially bottom end of a load to be carried and an upwardly and rearwardly inclining backing portion forming a backing portion forming a backing support for the load, said backing portion of said load-receiving frame means including a pair of widely laterally spaced side rails, a pair of laterally spaced bars respectively pivotally connected at the bottom ends thereof to the rear end portion of said base frame means for fore and aft pivotal movement thereon and pivotally connected to a pair of slide members at the upper ends thereof, said slide members being mounted for fore and aft sliding movement on said side rails so the elongated bracing bars maintain connection with said side rails through said slide members for the various angles of extent thereof, manually releasable locking means for locking said slide means to said backing portion in any one of a number of selected positions thereof where said backing portion has a desired selection of angular positions relative to said base frame means, said locking means including retractable pins carried by said slide members and longitudinally spaced laterally inwardly opening apertures in said side rails, said locking pins being spring urged into a selected corresponding pair of apertures in said side rails, and said manually releasable locking means including a pair of laterallY spaced squeezable handles each of which controls independently the withdrawing of one of said locking pins from an aperture in one of said side rails.
Claim 7
Dependent Claim
360 words
A self-supporting cart for handling cartons and the like, said cart comprising: base frame means carrying a pair of widely laterally spaced front roller means at the front end portion of said base frame means permitting the cart to be tilted forwardly during loading and unloading thereof and at least one rear roller means at the rear end portion of said base frame means where at least three points of rolling support are provided for the cart, load-receiving frame means pivotally mounted at the front end portion of said base frame means for fore and aft movement so the angle of inclination thereof is adjustable, said load-receiving frame means including a forwardly extending foot portion for engaging the initially bottom end of a load to be carried and an upwardly and rearwardly inclining backing portion forming a backing portion forming a backing support for the load, said backing portion of said load-receiving frame means including a pair of widely laterally spaced side rails, a pair of laterally spaced bars respectively pivotally connected at the bottom ends thereof to the rear end portion of said base frame means for fore and aft pivotal movement thereon and pivotally connected to a pair of slide members at the upper ends thereof, said slide members being mounted for fore and aft sliding movement on said side rails so the elongated bracing bars maintain connection with said side rails through said slide members for the various angles of extent thereof, manually releasable locking means for locking said slide means to said backing portion in any one of a number of selected positions thereof where said backing portion has a desired selection of angular positions relative to said base frame means, said locking means including retractable pins carried by said slide members and longitudinally spaced laterally inwardly opening apertures in said side rails, said locking pins being spring urged into a selected corresponding pair of apertures in said side rails, and said manually releasable locking means including a pair of laterallY spaced squeezable handles each of which controls independently the withdrawing of one of said locking pins from an aperture in one of said side rails.
Claim 8
Dependent Claim
397 words
A self-supporting cart for handling cartons and the like, said cart comprising: base frame means carrying a pair of widely laterally spaced front roller means at the front end portion of said base frame means permitting the cart to be tilted forwardly during loading and unloading thereof and at least one rear end portion of said base frame means where at least three points of rolling support are provided for the cart, load-receiving frame means pivotally mounted at the front end portion of said base frame means for fore and aft movement so the angle of inclination thereof is adjustable, said load-receiving frame means including a forwardly extending foot portion for engaging the initially bottom end of a load to be carried and an upwardly and rearwardly inclining backing portion forming a backing support for the load, elongated bracing frame means pivotally connected at the bottom ends thereof to the rear end portion of said base frame means for fore and aft pivotal movement thereon and pivotally connected to slide means at the upper ends thereof, said slide means being mounted for fore and aft sliding movement on said backing portion of said load-receiving frame means so the elongated bracing means maintains connection with said backing portion for the various angles of extent thereof, said backing portion of said load-receiving frame means in one of said angular positions being contiguous and almost parallel to said base frame means and said elongated bracing means, wherein the cart is effectively in a compact folded condition for storage, and said base frame means and bracing means being opposite and spaced from said backing portion when the cart is in said compact folded condition, said bracing means and base frame means then forming a snap-action toggle lever system where they initially make an angle of near 180* facing said backing portion and with a modest force applied to the point where they are pivotally connected will snap into an angle facing away from said backing portion and manually releasable locking means for locking said slide means to said backing portion in any one of a number of selected positions thereof where said backing portion has a desired selection of angular positions relative to said base frame means and handle means at the rear of the cart which handle means can be grasped by the operator for pushing or pulling the cart.
Claim 9
Dependent Claim
397 words
A self-supporting cart for handling cartons and the like, said cart comprising: base frame means carrying a pair of widely laterally spaced front roller means at the front end portion of said base frame means permitting the cart to be tilted forwardly during loading and unloading thereof and at least one rear end portion of said base frame means where at least three points of rolling support are provided for the cart, load-receiving frame means pivotally mounted at the front end portion of said base frame means for fore and aft movement so the angle of inclination thereof is adjustable, said load-receiving frame means including a forwardly extending foot portion for engaging the initially bottom end of a load to be carried and an upwardly and rearwardly inclining backing portion forming a backing support for the load, elongated bracing frame means pivotally connected at the bottom ends thereof to the rear end portion of said base frame means for fore and aft pivotal movement thereon and pivotally connected to slide means at the upper ends thereof, said slide means being mounted for fore and aft sliding movement on said backing portion of said load-receiving frame means so the elongated bracing means maintains connection with said backing portion for the various angles of extent thereof, said backing portion of said load-receiving frame means in one of said angular positions being contiguous and almost parallel to said base frame means and said elongated bracing means, wherein the cart is effectively in a compact folded condition for storage, and said base frame means and bracing means being opposite and spaced from said backing portion when the cart is in said compact folded condition, said bracing means and base frame means then forming a snap-action toggle lever system where they initially make an angle of near 180* facing said backing portion and with a modest force applied to the point where they are pivotally connected will snap into an angle facing away from said backing portion and manually releasable locking means for locking said slide means to said backing portion in any one of a number of selected positions thereof where said backing portion has a desired selection of angular positions relative to said base frame means and handle means at the rear of the cart which handle means can be grasped by the operator for pushing or pulling the cart.
Claim 10
Dependent Claim
412 words
A self-supporting cart for handling cartons and the like, said cart comprising: base frame means carrying a pair of widely laterally spaced front roller means at the front end portion of said base frame means permitting the cart to be tilted forwardly during loading and unloading thereof and at least one rear roller means at the rear end portion of said base frame means where at least three points of rolling support are provided for the cart, load-receiving frame means pivotally mounted at the front end portion of said base means for fore and aft movement so the angle of inclination thereof is adjustable, said load-receiving frame means including a forwardly extending foot portion for engaging the initially bottom end of a load to be carried and an upwardly and rearwardly inclining backing portion forming a backing support for the load, elongated bracing frame means pivotally connected at the bottom ends thereof to the rear end portion of said base frame means for fore and aft pivotal movement thereon and pivotally connected to slide means at the upper ends thereof, said slide means being mounted for fore and aft sliding movement on said backing portion of said load-receiving frame means so the elongated bracing means maintains connection with said backing portion for the various angles of extend thereof, manually releasable locking means for locking said slide means to said backing portion in any one of a number of selected positions thereof where said bAcking portion has a desired selection of angular positions relative to said base frame means, said manually releasable locking means being mounted for bodily movement with said slide means and including a pair of spaced handles at the rear of said backing portion of said load-receiving frame means and arranged to be grasped and squeezed by one hand of the user to release the locking means to permit said slide means to move along said backing portion to permit the user to be centered behind the frame close to said backing portion of the load-receiving frame means and to grasp the handles as he tilts the cart forwardly on said pair of front roller means to raise the rear end of the cart during loading and unloading of the cart and as the tilted cart is lowered from a tilted position and while doing so to push or pull said handles while said locking means is released to vary the angle of said backing portion of said load-receiving frame.
Claim 11
Dependent Claim
412 words
A self-supporting cart for handling cartons and the like, said cart comprising: base frame means carrying a pair of widely laterally spaced front roller means at the front end portion of said base frame means permitting the cart to be tilted forwardly during loading and unloading thereof and at least one rear roller means at the rear end portion of said base frame means where at least three points of rolling support are provided for the cart, load-receiving frame means pivotally mounted at the front end portion of said base means for fore and aft movement so the angle of inclination thereof is adjustable, said load-receiving frame means including a forwardly extending foot portion for engaging the initially bottom end of a load to be carried and an upwardly and rearwardly inclining backing portion forming a backing support for the load, elongated bracing frame means pivotally connected at the bottom ends thereof to the rear end portion of said base frame means for fore and aft pivotal movement thereon and pivotally connected to slide means at the upper ends thereof, said slide means being mounted for fore and aft sliding movement on said backing portion of said load-receiving frame means so the elongated bracing means maintains connection with said backing portion for the various angles of extend thereof, manually releasable locking means for locking said slide means to said backing portion in any one of a number of selected positions thereof where said bAcking portion has a desired selection of angular positions relative to said base frame means, said manually releasable locking means being mounted for bodily movement with said slide means and including a pair of spaced handles at the rear of said backing portion of said load-receiving frame means and arranged to be grasped and squeezed by one hand of the user to release the locking means to permit said slide means to move along said backing portion to permit the user to be centered behind the frame close to said backing portion of the load-receiving frame means and to grasp the handles as he tilts the cart forwardly on said pair of front roller means to raise the rear end of the cart during loading and unloading of the cart and as the tilted cart is lowered from a tilted position and while doing so to push or pull said handles while said locking means is released to vary the angle of said backing portion of said load-receiving frame.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |