Patent US4541644A successfully refreshed from Google Patents.
US4541644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manual utility cart
Assignee: Individual
•
Filing: 1983-03-17
•
Granted: 1985-09-17
•
Expires: 2003-03-17
Abstract
Abstract A manual utility cart including a frame having spaced cargo retaining portions and a lower portion. An axle journaled in the lower portion of said frame journals a first set of wheels. A second set of wheels is journaled on an axle spaced from and supported by said first axle and is shiftable about the first axle between a retracted position and a frame supporting position to raise the first set of wheels from a surface. A cover overlies both sets of wheels to support a cargo within the frame.
Inventors
- 👤 Henry Diener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:15
CPC Classifications
B; B62; B62B; B62B1/00; B62B1/10; B62B1/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
103 words
A manual utility cart comprising a rigid cargo carrying frame, an axle journaled at the lower end of said frame and journaling a first set of wheels to project below said frame, means for mounting a second set of wheels for pivotal movement about said axle between a position lower than said first wheels and a raised position on said frame, and means for rotating said axle and shifting said second set of wheels relative to said frist wheels and said frame betwen said lowered and raised positions, at least one set of wheels supporting a part of said frame at all times.
Claim 2
Dependent Claim
103 words
A manual utility cart comprising a rigid cargo carrying frame, an axle journaled at the lower end of said frame and journaling a first set of wheels to project below said frame, means for mounting a second set of wheels for pivotal movement about said axle between a position lower than said first wheels and a raised position on said frame, and means for rotating said axle and shifting said second set of wheels relative to said frist wheels and said frame betwen said lowered and raised positions, at least one set of wheels supporting a part of said frame at all times.
Claim 3
Dependent Claim
24 words
The manual utility cart of claim 1, and a cargo supporting cover carried by said frame and positioned above said axle and said wheels.
Claim 4
Dependent Claim
121 words
A manual utility cart comprising a substantially U-shaped rigid frame having spaced fore and aft cargo retaining sections and a lower portion therebetween, a first axle journaled in the frame adjacent the lower rear portion of the frame, a first set of wheels journaled on said axle to project below said lower frame portion, means secured to said first axle and mounting a second axle spaced from and parallel to said first axle, a second set of wheels journaled on said second axle, resilient means normally maintaining said second said second wheels in a position above the lower portion of said frame, and means for rotating said axle and lowering said second wheels to a position lower than said first wheels.
Claim 5
Dependent Claim
121 words
A manual utility cart comprising a substantially U-shaped rigid frame having spaced fore and aft cargo retaining sections and a lower portion therebetween, a first axle journaled in the frame adjacent the lower rear portion of the frame, a first set of wheels journaled on said axle to project below said lower frame portion, means secured to said first axle and mounting a second axle spaced from and parallel to said first axle, a second set of wheels journaled on said second axle, resilient means normally maintaining said second said second wheels in a position above the lower portion of said frame, and means for rotating said axle and lowering said second wheels to a position lower than said first wheels.
Claim 6
Dependent Claim
35 words
The manual utility cart defined in claim 3, wherein said last named means includes a lever piboted to the upper rear portion of said frame between a pair of spaced stops carried by said frame.
Claim 7
Dependent Claim
30 words
The manual utility cart defined in claim 4, wherein said last named means includes a link connected to said lever and to an arm projecting laterally from said first axle.
Claim 8
Dependent Claim
20 words
The manual utility cart defined in claim 3, and cargo support means carried by said frame spaced above said wheels.
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) | 1988-09-16 | 1989-03-18 | 1989-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-16 | 1993-03-18 | 1993-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-16 | 1997-03-18 | 1997-09-17 | $7700.00 | Window Closed / Lapsed |