US4128252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foldable suitcase dolly
Assignee: Individual
•
Filing: 1976-12-20
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Granted: 1978-12-05
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Expires: 1996-12-20
Abstract
Abstract A foldable hand truck including an elongate telescopic central member and a pair of elongate legs pivotally connected to the lower end of the central member for swinging between positions extending either along and parallel to the central member or extending outwardly at a substantial angle therefrom. Elongate locking members are pivotally connected at one set of their ends to the legs and are slidable at their inner ends along the central member between positions spaced a considerable distance from the pivot connection for the legs, to permit collapsing of the legs, and a more closely spaced relationship with said pivot connections for the legs to lock the legs in their extended positions. Wheel assemblies are mounted on the legs and are swingable between stored positions closely adjacent the legs and operating positions extending outwardly therefrom. Load support arms are swingable between collapsed positions extending longitudinally of the central member and operating positions extending outwardly therefrom at substantial angles relative to each other and diverging on progressing outwardly from the central member to provide a wide based load support.
Inventors
- 👤 John J. Raniero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:22
CPC Classifications
B; B62; B62B; B62B1/00; B62B1/10; B62B1/12; B62B1/125; A; A45; A45C; A45C13/00; A45C13/38; A45C13/385; B62B2202/00; B62B2202/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
293 words
A foldable hand truck comprising an elongate telescopic central member, load support means connected to said central member, a pair of legs swingably connected adjacent an inner set of their ends to the lower end of said central member for swinging relative to said central member between collapsed positions extending upwardly along and adjacent said central member and extended positions extending outwardly from opposite sides of said central member, substantially normal thereto, a wheel assembly connected to each of said legs, adjacent the outer end thereof, for supporting said truck above a ground surface when said legs are extended, a pair of elongate locking arms, each of said locking arms being pivotally connected adjacent one of its ends to one of said legs in a region spaced a distance from the inner end of said leg, said locking arms being independently movable with respect to each other, a pair of tracks defined in said central member and extending longitudinally thereof, and means slidably mounting the end of each of said locking arms, opposite its said one end, within an associated track above the pivot connection between said legs and central member, said locking arm being mounted for movement therealong between a locked position adjacent said inner end of said leg, wherein said locking arm extends at a low angle relative to its associated leg, such that the tendency of said leg to swing from its extended to its collapsed position causes the locking arm to press against said central member to frictionally lock said leg in its extended position, and a position slid upwardly along said central member to permit swinging of said leg to its collapsed position wherein said locking arm and the associated elongate leg are disposed adjacent said central member.
Claim 2
Dependent Claim
293 words
A foldable hand truck comprising an elongate telescopic central member, load support means connected to said central member, a pair of legs swingably connected adjacent an inner set of their ends to the lower end of said central member for swinging relative to said central member between collapsed positions extending upwardly along and adjacent said central member and extended positions extending outwardly from opposite sides of said central member, substantially normal thereto, a wheel assembly connected to each of said legs, adjacent the outer end thereof, for supporting said truck above a ground surface when said legs are extended, a pair of elongate locking arms, each of said locking arms being pivotally connected adjacent one of its ends to one of said legs in a region spaced a distance from the inner end of said leg, said locking arms being independently movable with respect to each other, a pair of tracks defined in said central member and extending longitudinally thereof, and means slidably mounting the end of each of said locking arms, opposite its said one end, within an associated track above the pivot connection between said legs and central member, said locking arm being mounted for movement therealong between a locked position adjacent said inner end of said leg, wherein said locking arm extends at a low angle relative to its associated leg, such that the tendency of said leg to swing from its extended to its collapsed position causes the locking arm to press against said central member to frictionally lock said leg in its extended position, and a position slid upwardly along said central member to permit swinging of said leg to its collapsed position wherein said locking arm and the associated elongate leg are disposed adjacent said central member.
Claim 3
Dependent Claim
66 words
The truck of claim 1 wherein each said wheel assembly is swingably connected adjacent the outer end of its associated leg, said wheel assembly being mounted for swinging between a stored position in which it is closely adjacent a face of said leg, and an operating position projecting outwardly from said leg, and means for releasably securing said wheel assembly in its stored or operating position.
Claim 4
Dependent Claim
32 words
The truck of claim 2, wherein said releasable securing means for said wheel assembly comprises a spring clip yieldably engaging and holding said wheel assembly in either its stored or operating position.
Claim 5
Dependent Claim
62 words
The truck of claim 1 which further comprises a pair of elongate leg-mounted load support arms, each support arm being pivotally connected adjacent one of its ends to one of said legs for swinging between a stored position extending along and closely adjacent a side of said leg and an operating position extending outwardly at a substantial angle relative to said leg.
Claim 6
Dependent Claim
105 words
The truck of claim 1 wherein said load support means comprises a pair of elongate load support arms pivotally mounted on said central member for unrestricted downward and upward swinging movement between collapsed positions extending substantially parallel to the longitudinal axis of said central member and support positions extending outwardly substantially normal to the longitudinal axis of said central member and disposed at a substantial angle relative to each other, with said support arms diverging on progressing away from said central member, and stop means attached to said central member for preventing the downward swinging of each of said support arms beyond its support position.
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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) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |