Patent US3857460A successfully refreshed from Google Patents.
US3857460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination ladder and tool cart
Assignee: Individual
•
Filing: 1974-04-10
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Granted: 1974-12-31
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Expires: 1994-04-10
Abstract
Abstract A combined step ladder and tool cart having three basic components, namely a special, foldable step ladder having its set of front legs substantially shorter than the back set, a collapsible wheeled dolly, and removable tool or storage bin to be fitted within the confines of the dolly and attached thereto. The step ladder is mounted onto the dolly at its uppermost section by means of bolts or pivot pins and is designed to be folded up, over and horizontally onto the dolly so that it rides thereon when the dolly is transported from one location to another. The storage bin, which also can be collapsible if desired, is detachable from the dolly and carries on its front face such paraphernalia as a name tag, pencil holder and clip board. The dolly which is vertically adjustable serves as a set of front legs for the step ladder when the ladder is in its erected disposition. The dolly has its two sides joined by means of an X-folding member located at its back end and is preferrably completely open at its front end. Auxiliary tool trays and/or paint can racks can be mounted on the ladder for further utility.
Inventors
- 👤 R Nini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:38
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/50; E06C1/00; E06C1/02; E06C1/38; E06C1/397
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
107 words
A combined ladder and tool cart comprising: a step ladder having one set of its lower legs substantially shorter than the other; a collapsible dolly defining a generally open interior when in its erected disposition; said shorter legs of said ladder including ladder fastening means for fastening them to said collapsible dolly; and a storage bin having a cross-section which at least generally conforms to said open interior of said dolly when erected and having bin fastening means for fastening it to said dolly within the interior thereof; said ladder, said dolly and said bin capable of being easily separated for compact storage when not in use.
Claim 2
Dependent Claim
107 words
A combined ladder and tool cart comprising: a step ladder having one set of its lower legs substantially shorter than the other; a collapsible dolly defining a generally open interior when in its erected disposition; said shorter legs of said ladder including ladder fastening means for fastening them to said collapsible dolly; and a storage bin having a cross-section which at least generally conforms to said open interior of said dolly when erected and having bin fastening means for fastening it to said dolly within the interior thereof; said ladder, said dolly and said bin capable of being easily separated for compact storage when not in use.
Claim 3
Dependent Claim
56 words
The device as defined in claim 1 wherein: said step ladder is fastened to said dolly at its upper most section by means of pivot pin means for allowing said ladder to be folded up, over and onto the top dolly so that it rides thereon when the dolly is transported from one location to another.
Claim 4
Dependent Claim
31 words
The deviCe as defined in claim 1 wherein: said dolly serves as a set of lower front legs for said step ladder when said step ladder is in its erected position.
Claim 5
Dependent Claim
43 words
The device as defined in claim 1 wherein: said dolly is equipped with four wheels, at least two of which are lockable by means of foot locks so that the cart with its erected step ladder can be rendered immovable relative to floor.
Claim 6
Dependent Claim
29 words
The device as defined in claim 1 wherein said dolly has two sides and a single folding end member interconnecting said sides, the remaining end being open and unobstructed.
Claim 7
Dependent Claim
40 words
The device as defined in claim 1 wherein said single folding member comprises and X-folding structure wherein the two bar elements pivot about their center connection, the ends of said bar elements being connected to said sides of said dolly.
Claim 8
Dependent Claim
66 words
The device as defined in claim 1 wherein: said dolly is rectangular in horizontal cross-section and has four vertical corner posts comprised of a set of four lower tubular legs and a set of four upper tubular legs mounted within said lower tubular legs for relative, telescopic motion with respect to each other, whereby the height of said dolly can be caried by said telescopic action.
Claim 9
Dependent Claim
27 words
The device as defined in claim 1 wherein: said storage bin has mounted on its front face a name tag, a pencil holder and a clip board.
Claim 10
Dependent Claim
324 words
A combined ladder and tool cart comprising: a step ladder having one set of its lower legs substantially shorter than the other; a collapsible dolly defining a generally open interior when in its erected disposition; said dolly having two sides and a single folding end member interconnecting said sides, the remaining end being open and unobstructed, said single folding member comprising an X-folding structure wherein the two bar elements pivot about their center connection, the ends of said bar elements being connected to said sides of said dolly; said dolly being rectangular in horizontal cross-section and having four vertical corner posts comprised of a set of four lower tubular legs and a set of four upper tubular legs mounted within said lower tubular legs for relative, telescopic motion with respect to each other, whereby the height of said dolly can be varied by said telescopic action; said shorter legs of said ladder including ladder fastening means for fastening them to said collapsible dolly, said step ladder being fastened to said dolly at its upper most section by means of pivot pin means for allowing said ladder to be folded up, over and onto the top dolly so that it rides thereon when the dolly is transported from one location to another; said dolly serving as a set of lower front legs for said step ladder when said step ladder is in its erected position; said dolly being equipped with four wheels, at least two of which are lockable by means of foot locks so that the cart with its erected step ladder can be rendered immovable relative to floor; and a storage bin having a cross-section which at least generally conforms to said open interior of said dolly when erected and having bin fastening means for fastening it to said dolly within the interior thereof; said ladder, said dolly and said bin capable of being easily separated for compact storage when not in use.
Claim 11
Dependent Claim
324 words
A combined ladder and tool cart comprising: a step ladder having one set of its lower legs substantially shorter than the other; a collapsible dolly defining a generally open interior when in its erected disposition; said dolly having two sides and a single folding end member interconnecting said sides, the remaining end being open and unobstructed, said single folding member comprising an X-folding structure wherein the two bar elements pivot about their center connection, the ends of said bar elements being connected to said sides of said dolly; said dolly being rectangular in horizontal cross-section and having four vertical corner posts comprised of a set of four lower tubular legs and a set of four upper tubular legs mounted within said lower tubular legs for relative, telescopic motion with respect to each other, whereby the height of said dolly can be varied by said telescopic action; said shorter legs of said ladder including ladder fastening means for fastening them to said collapsible dolly, said step ladder being fastened to said dolly at its upper most section by means of pivot pin means for allowing said ladder to be folded up, over and onto the top dolly so that it rides thereon when the dolly is transported from one location to another; said dolly serving as a set of lower front legs for said step ladder when said step ladder is in its erected position; said dolly being equipped with four wheels, at least two of which are lockable by means of foot locks so that the cart with its erected step ladder can be rendered immovable relative to floor; and a storage bin having a cross-section which at least generally conforms to said open interior of said dolly when erected and having bin fastening means for fastening it to said dolly within the interior thereof; said ladder, said dolly and said bin capable of being easily separated for compact storage when not in use.
Claim 12
Dependent Claim
27 words
The device as defined in claim 9 wherein: said storage bin has mounted on its front face a name tag, a pencil holder and a clip board.
References Cited (Backward Citations)
US2997125A
Cited
US2990764A
Cited
US3190406A
Cited
US3434566A
Cited
US3490558A
Cited
US3552521A
Cited
US3684055A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |