Patent US4009762A successfully refreshed from Google Patents.
US4009762A
Expired / Lapsed
US
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Convertible ladder-carrier vehicle assembly
Assignee: Lawrence Peska Associates Inc
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Filing: 1976-04-28
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Granted: 1977-03-01
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Expires: 1996-04-28
Abstract
Abstract A convertible ladder-carrier vehicle assembly includes a pair of parallel tubing elements connected by at least four transverse tubing elements. A second pair of tubing elements are positioned slidably within the first pair. Both pairs of tubing elements have aligned apertures. At least one resilient member having a hook element at each end is secured between the first pair of tubing elements detachably within the aligned apertures of the first and second pairs to thereby maintain the second pair of tubing elements in fixed relation to the second pair. A wheel assembly is detachably connected to each side of the first pair of tubing elements, journalled in intermediate transverse tubing elements.
Inventors
- 👤 Bjorn Bjerkgard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:29
CPC Classifications
E; E06; E06C; E06C1/00; E06C1/02; E06C1/38; E06C1/397; E06C1/14; E06C1/16; E06C1/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
149 words
A convertible ladder-carrier vehicle assembly comprising in combination: a first pair of elongated parallel hollow metal tubing members having at least one set of opposed aligned apertures therein; at least four transverse elongated metal elements connected in spaced parallel relation across said first pair of elongated members to thereby maintain said first pair of members in fixed spatial relation; a second pair of elongated elements positioned slidably within said first pair of elongated members and having at least one set of opposed aligned apertures therein; at least one transversely extending resilient attaching member having a hook element at each end thereof dimensioned to fit within said sets of apertures to thereby secure said second pair of elongated elements in fixed position relative to said first pair of elongated members; and a pair of wheel assemblies detachably journalled in the opposed ends of intermediate ones of said transverse elongated elements.
Claim 2
Dependent Claim
149 words
A convertible ladder-carrier vehicle assembly comprising in combination: a first pair of elongated parallel hollow metal tubing members having at least one set of opposed aligned apertures therein; at least four transverse elongated metal elements connected in spaced parallel relation across said first pair of elongated members to thereby maintain said first pair of members in fixed spatial relation; a second pair of elongated elements positioned slidably within said first pair of elongated members and having at least one set of opposed aligned apertures therein; at least one transversely extending resilient attaching member having a hook element at each end thereof dimensioned to fit within said sets of apertures to thereby secure said second pair of elongated elements in fixed position relative to said first pair of elongated members; and a pair of wheel assemblies detachably journalled in the opposed ends of intermediate ones of said transverse elongated elements.
Claim 3
Dependent Claim
35 words
A convertible ladder-carrier vehicle according to claim 1, wherein each of said second pair of elongated elements is provided with an end section which is pivotably connected to the remaining portion of the elongated element.
Claim 4
Dependent Claim
21 words
A convertible ladder-carrier vehicle according to claim 2, wherein a through aperture is provided in each of said pivotable end sections.
Claim 5
Dependent Claim
33 words
A convertible ladder-carrier vehicle according to claim 1, wherein said first and second pairs of elongated members and elements respectively are provided with a set of opposed aligned apertures adjacent the ends thereof.
Claim 6
Dependent Claim
26 words
A convertible ladder-carrier vehcile according to claim 1, including a 90 degree angle element slidably positioned in the ends of said second pair of elongated elements.
Claim 7
Dependent Claim
27 words
A convertible ladder-carrier vehicle according to claim 1, including a chain element secured to the ends of at least one of said second pair of elongated elements.
Claim 8
Dependent Claim
62 words
A convertible ladder-carrier vehicle according to claim 1, wherein each of said wheel assemblies includes a pair of arms, one end of each of said arms being provided with a bushing slidably and detachably connected in the ends of said intermediate transverse elements, the arms being interconnected adjacent their other ends, and a wheel element is journalled in one of said arms.
Claim 9
Dependent Claim
32 words
A convertible ladder-carrier vehicle according to claim 7, including a coil spring connected between said one end of one of said arms and the transverse element to which such arm is connected.
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) | 1980-02-29 | 1980-08-30 | 1981-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-29 | 1984-08-30 | 1985-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-29 | 1988-08-30 | 1989-03-01 | $7700.00 | Window Closed / Lapsed |