Patent US3677569A successfully refreshed from Google Patents.
US3677569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foldable crawler
Assignee: Individual
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Filing: 1970-03-09
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Granted: 1972-07-18
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Expires: 1990-03-09
Abstract
Abstract A foldable crawler is provided herein which, in its folded position, has a valise-like configuration. The crawler comprises a bottom side having wheels mounted thereon, sidewalls, and a top side. An extender is hingeably attached at one end to one end of the top side. A wheel is affixed to the top surface of the extender. in its folded position, proximate the other end of the extender. The extender can be rotated 180* and the wheel on the extender can contact a raised surface, such as the floor inside a kitchen cabinet, to provide a substantially flat, rollable working surface.
Inventors
- 👤 Howard M Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:47
CPC Classifications
B; B62; B62B; B62B3/00; B62B3/02; B62B2205/00; B62B2205/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
214 words
A foldable crawler having a valise-like configuration in its folded position comprising: a bottom side having an upper surface and a lower surface; wheels mounted on said lower surface of said bottom side for rollably engaging a floor or ground surface; sidewalls extending upwardly of said bottom side; a top side having two ends and having an upper surface and a lower surface and normally juxtaposed on at least two of said sidewalls; an extender having two ends and being hingeably attached at one end to one of said ends of said top side and rotatable thereabout; said extender having, in its folded position, an upper surface and a lower surface, said lower surface being juxtaposed of said upper surface of said top side; and at least one wheel affixed to said upper surface proximate the other end of said extender, wherein said at least one wheel is positioned at a higher elevation than said wheels mounted on said lower surface when said extender is rotated to an unfoled positon to provide a substantially flat, rollable working surface consisting of said upper surface of said top side and said lower surface of said extender, said at least one wheel positioned for engaging a surface at a higher elevation than said floor or ground surface.
Claim 2
Dependent Claim
214 words
A foldable crawler having a valise-like configuration in its folded position comprising: a bottom side having an upper surface and a lower surface; wheels mounted on said lower surface of said bottom side for rollably engaging a floor or ground surface; sidewalls extending upwardly of said bottom side; a top side having two ends and having an upper surface and a lower surface and normally juxtaposed on at least two of said sidewalls; an extender having two ends and being hingeably attached at one end to one of said ends of said top side and rotatable thereabout; said extender having, in its folded position, an upper surface and a lower surface, said lower surface being juxtaposed of said upper surface of said top side; and at least one wheel affixed to said upper surface proximate the other end of said extender, wherein said at least one wheel is positioned at a higher elevation than said wheels mounted on said lower surface when said extender is rotated to an unfoled positon to provide a substantially flat, rollable working surface consisting of said upper surface of said top side and said lower surface of said extender, said at least one wheel positioned for engaging a surface at a higher elevation than said floor or ground surface.
Claim 3
Dependent Claim
23 words
The foldable crawler of claim 1 wherein said extender has substantially the same configuration as said top side and is substantially aligned therewith.
Claim 4
Dependent Claim
43 words
The foldable crawler of claim 2 wherein said top side is hingeably attached at one end to one of said sidewalls and rotatable thereabout; and said extender is hingeably attached at one end thereof to said hingeably attached end of said top side.
Claim 5
Dependent Claim
65 words
The foldable crawler of claim 1 wherein said sidewalls are formed in a lower section and an upper section; said lower section being affixed to said bottom side; said upper section being affixed to said top side; and said lower sections and said upper sections are hingeably attached along one of said sidewalls; and a latch is provided for securing said sections in folded relation.
Claim 6
Dependent Claim
39 words
The foldable crawler of claim 1 wherein a drawer is formed and bounded by said bottom side, said sidewalls, and said top side; said sidewall opposite said hinged end of said top side forming the front of said drawer.
Claim 7
Dependent Claim
26 words
The foldable crawler of claim 1 wherein a pillow portion is formed on the lower surface of said extender on said other end of said extender.
Claim 8
Dependent Claim
19 words
The foldable crawler of claim 1 wherein the sidewall height ranges from about 2 inches to about 5 inches.
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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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |