US3841505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roll off container
Assignee: Individual
•
Filing: 1973-02-07
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Granted: 1974-10-15
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Expires: 1993-02-07
Abstract
Abstract A self-packing and ejecting roll off container has a top door and two side doors slightly spaced from a first closed end. A concave packing and ejecting blade having a replaceable edge with a downward extending, friction reducing strip is mounted on a frame which is supported on guides spaced upward from the bottom of the sidewalls. The frame and curved blade are homed at the first closed end with the blade near the door openings. The frame and blade are moved by a multiple stage hydraulic cylinder. A connection in the power lines permits the cylinder to be operated by a stationary power supply at the filling station and by the truck''s hydraulic power supply. When operating in a packing stage, the cylinder moves the blade half-way through the container and then returns the blade to its homed position. When excessive pressure occurs in the actuator during packing, the blade is returned to the home position without travelling its full length. In the ejecting mode, the frame and blade are driven substantially the full length of the container. The container is completed by a power drive tailgate which closes the container and by a seal which extends inward from the tailgate against the open end to tightly seal the container. The base of the container has hooks at opposite longitudinal ends so that the container may be rolled on and rolled off trucks at either end.
Inventors
- 👤 J Kent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:45
CPC Classifications
B; B65; B65F; B65F3/00; B65F3/24; B65F3/28
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
352 words
A self packing and ejecting roll off container comprising a base, an elongated container mounted on the base and having a bottom wall, first and second sidewalls, a ceiling wall, a first end wall and having a second open end, a hinge Attached to the second open end adjacent the ceiling wall, and a tailgate attached to the hinge for overlying the open end in completion of the closing of the container, first and second openings in the first and second sidewalls, respectively. and first and second side doors hinged to the first and second walls and covering the first and second openings, a slidable frame mounted within the container for sliding longitudinally therein between the first end and the second end, a blade mounted on the slidable frame and facing the second end, an actuator connected to the slidable frame and connected to the container for pushing the slidable frame and the blade toward the second end and for retracting the frame and blade toward a home position near the first end with the blade being positioned between the first and second doors and the first end, power means connected to the actuator for driving the actuator toward the second end and toward the first end, and control means connected to the power means for controlling application of power to the actuator in a first packing condition and in a second ejecting condition, wherein the actuator comprises an extensible fluid actuator, and wherein the power means comprises fluid lines connected between the actuator and a first power source on a vehicle and a second power source at a loading station, pressure responsive valve means in the fluid lines for limiting pressure to the actuator in a packing condition, a second valve means in the fluid lines and travel limiting means connected to the fluid actuator and to the second valve means for reversing the second valve means upon extension of the fluid actuator to a predetermined limit in a packing condition, and connection means for selectively connecting either of the fluid lines to one of the first and second power sources.
Claim 2
Dependent Claim
352 words
A self packing and ejecting roll off container comprising a base, an elongated container mounted on the base and having a bottom wall, first and second sidewalls, a ceiling wall, a first end wall and having a second open end, a hinge Attached to the second open end adjacent the ceiling wall, and a tailgate attached to the hinge for overlying the open end in completion of the closing of the container, first and second openings in the first and second sidewalls, respectively. and first and second side doors hinged to the first and second walls and covering the first and second openings, a slidable frame mounted within the container for sliding longitudinally therein between the first end and the second end, a blade mounted on the slidable frame and facing the second end, an actuator connected to the slidable frame and connected to the container for pushing the slidable frame and the blade toward the second end and for retracting the frame and blade toward a home position near the first end with the blade being positioned between the first and second doors and the first end, power means connected to the actuator for driving the actuator toward the second end and toward the first end, and control means connected to the power means for controlling application of power to the actuator in a first packing condition and in a second ejecting condition, wherein the actuator comprises an extensible fluid actuator, and wherein the power means comprises fluid lines connected between the actuator and a first power source on a vehicle and a second power source at a loading station, pressure responsive valve means in the fluid lines for limiting pressure to the actuator in a packing condition, a second valve means in the fluid lines and travel limiting means connected to the fluid actuator and to the second valve means for reversing the second valve means upon extension of the fluid actuator to a predetermined limit in a packing condition, and connection means for selectively connecting either of the fluid lines to one of the first and second power sources.
Claim 3
Dependent Claim
46 words
The container apparatus of claim 1 further comprising sealing means mounted on the tailgate and extending inward toward the second open end for sealing the container when the tailgate is closed, and for holding the sealing means away from the container when the tailgate is open.
Claim 4
Dependent Claim
34 words
The container apparatus of claim 1 further comprising a third opening in the ceiling wall adjacent the first end wall, and a top door hinged to the ceiling wall for closing the third opening.
Claim 5
Dependent Claim
48 words
The apparatus of claim 1 wherein the control means is positioned in a first packing condition when the actuator is connected to the second power source, and wherein the control means is configured in a second ejecting condition when the actuator is connected to the second power source.
Claim 6
Dependent Claim
25 words
The apparatus of claim 1 wherein the blade comprises a curved blade having a concave face and curving smoothly in a top to bottom direction.
Claim 7
Dependent Claim
42 words
The apparatus of claim 1 wherein the blade has a separable bottom edge piece constructed of high carbon steel in a wedge shape which may be removed from the frame and from the blade and replaced on the frame and the blade.
Claim 8
Dependent Claim
64 words
The apparatus of claim 6 further comprising a rabbeted groove extending across the lower face of the wedge shaped edge piece parallel to the edge and having a replaceable strip of high molecular weight polyolefin material fitted in the rabbeted groove and extended outward and downward therefrom for supporting the blade on the bottom wall of the container and eliminating contact between metal pieces.
Claim 9
Dependent Claim
61 words
The apparatus of claim 1 further comprising guide channels mounted on the sidewalls and facing inward and spaced upward from the bottom wall and outward extending guide plates mounted on the slidable frame and fitted into the guide channels for supporting the frame in the channels, the guide plates being removably mounted on the frame and having a friction reducing surface.
Claim 10
Dependent Claim
63 words
The apparatus of claim 1 further comprising a first hooking means at a first longitudinal end of the base and having a second hooking means at a second longitudinal end of the base, whereby the roll off container may be loaded on a truck at Either end of the container and whereby the container may be rolled off the truck at either end.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |