US5039226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable concrete mixer
Assignee: Individual
•
Filing: 1989-08-21
•
Granted: 1991-08-13
•
Expires: 2009-08-21
Abstract
Abstract A trailer for transporting and mixing concrete or similar products, comprising a wheeled frame and a mixing drum mounted to the wheeled frame for rotation in a first direction for mixing concrete and in a second direction for discharging concrete from the drum. A unidirectional driving connection is provided between a wheel of the frame and the mixing drum for rotating the drum in the concrete mixing direction as a result of movement of the wheeled frame. An electric motor is also provided on the frame for rotating the drum in the concrete discharging direction.
Inventors
- 👤 Gilles Lavoie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:11
CPC Classifications
B; B28; B28C; B28C5/00; B28C5/08; B28C5/18; B28C5/1806; B28C5/1818
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
100 words
A trailer for transporting and mixing concrete or similar products, comprising: wheeled frame; a mixing drum mounted to said wheeled frame for rotation in a first direction for mixing concrete and in a second direction for discharging concrete from said drum; a unidirectional driving connection between a wheel of said frame and said mixing drum to cause rotation of said mixing drum solely in said first direction as a result of movement of said wheeled frame; and selectively actuatable driving means on said frame in operative relationship with said mixing drum for rotating said mixing drum in said second direction.
Claim 2
Dependent Claim
100 words
A trailer for transporting and mixing concrete or similar products, comprising: wheeled frame; a mixing drum mounted to said wheeled frame for rotation in a first direction for mixing concrete and in a second direction for discharging concrete from said drum; a unidirectional driving connection between a wheel of said frame and said mixing drum to cause rotation of said mixing drum solely in said first direction as a result of movement of said wheeled frame; and selectively actuatable driving means on said frame in operative relationship with said mixing drum for rotating said mixing drum in said second direction.
Claim 3
Dependent Claim
33 words
A trailer as defined in claim 1, further including means to prevent a driving engagement between said driving means and a wheel of said wheeled frame during the operation of said driving means.
Claim 4
Dependent Claim
46 words
A trailer as defined in claim 1, including: transmission means between said wheel and said mixing drum; and ratchet means in said transmission means to allow for power transfer from said wheel to said mixing drum only when said wheeled frame moves in a predetermined direction.
Claim 5
Dependent Claim
15 words
A trailer as defined in claim 3, wherein said drive means include an electric motor.
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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) | 1994-08-12 | 1995-02-11 | 1995-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-12 | 1999-02-11 | 1999-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-12 | 2003-02-11 | 2003-08-13 | $7700.00 | Window Closed / Lapsed |