Self-propelled waste collection vehicle

• US 5,768,744 A
• Filed: 10/10/1996
• Issued: 06/23/1998
• Est. Priority Date: 09/26/1992
• Status: Expired due to Fees

• Current Assignee: Robin Hamilton
• Original Assignee: Robin Hamilton
• Inventors: Hamilton, Robin
• Primary Examiner(s): GERRITY, STEPHEN FRANCIS
• Application Number:
  US08/728,788
• Time in Patent Office: 621 Days
• Field of Search: 100/100, 100/102, 15/340.1, 15/345, 15/346, 406/39, 55/395, 55/430, 55/432
• US Class Current: 15/340.1
• CPC Class Codes: B30B 11/225 with adjustable outlet opening
• CPC Class Codes: B30B 11/246 Screw constructions
• CPC Class Codes: B30B 11/248 Means preventing the material from turning with the screw or returning towards the feed hopper
• CPC Class Codes: B30B 9/121 Screw constructions
• CPC Class Codes: B30B 9/18 with means for adjusting the outlet for the solid
• CPC Class Codes: B30B 9/3007 Control arrangements
• CPC Class Codes: B30B 9/3025 Extrusion chambers with adjustable outlet opening
• CPC Class Codes: B30B 9/3082 with compression means other than rams performing a rectilinear movement
• CPC Class Codes: B30B 9/3089 Extrusion presses
• CPC Class Codes: E01H 1/0863 Apparatus loosening or removing the dirt by blowing and subsequently dislodging it at least partially by suction liquids or semi-liquids E01H1/108; Combined suction and blowing nozzles

Abstract

Waste collection apparatus 10 comprises a first fluid duct 12 having an inlet at 14. A fan 16 creates a first fluid flow path 18 to draw waste material into the inlet 14, for collection. A second duct 20 directs air back along the periphery of the flow path 18 to deflect waste material up into the main path 18. Rotating air jets 32 are located near the inlet 14 to sweep an area to either side of the vehicle, to deflect waste material in to the path 18. The apparatus includes a compactor, which can be used alone.

Claims

1. A self-propelled waste collection vehicle for being moved in at least a forward direction over a ground surface for collecting and processing wind-blown litter, said vehicle comprising:

(a) a fluid duct defined by walls and having an inlet communicating with the ground surface for receiving the wind-blown litter into the vehicle, and an upwardly-turned feed section downstream of the inlet for directing the litter upwardly into a body of the vehicle, and said inlet extending across substantially the full width of the vehicle;

(b) fluid flow means communicating with said fluid duct, and operable for creating a fluid flow path along the fluid duct from the inlet to the upwardly turned feed section, thereby drawing the litter into the inlet for collection as the vehicle passes over the ground surface;

(c) compactor means carried by the vehicle and located downstream of said inlet for compacting the litter received through said fluid duct into a self-contained bale; and

(d) release means located downstream of said compactor means for automatically releasing the bales from the vehicle as they are formed and while collection continues, whereby the weight of the vehicle remains substantially constant as more waste material is collected.

2. A waste collection vehicle according to claim 1, wherein said fluid duct tapers in cross-section between the inlet and the upwardly turned feed section to create a fluid acceleration zone at an entrance of the feed section.

3. A waste collection vehicle according to claim 1, and comprising shredder means located downstream of said inlet for shredding the litter brought in along the fluid flow path.

4. A waste collection vehicle according to claim 1, further comprising at least one second fluid duct means defined by walls and having an outlet so located and arranged as to create a second fluid flow path at the periphery of the first fluid flow path and in a direction generally opposite the first path to thereby cause waste material which is being drawn along the periphery of the first path to be deflected into the main stream of fluid flowing along the first path.

5. A waste collection vehicle according to claim 4, in which said outlet of said at least one second fluid duct means comprises at least one outlet located in the region of the duct inlet.

6. A waste collection vehicle according to claim 5, comprising at least two outlets of said at least one second fluid duct means, said at least two outlets being located opposite one another in the region of the duct inlet.

7. A waste collection vehicle according to claim 5, comprising means for re-orienting said outlet of said at least one second fluid duct means at the duct inlet, in relation to the duct, whereby the second flow path can be re-oriented in relation to the first flow path.

8. A waste collection vehicle according to claim 7, wherein each outlet is pivotally or rotatably mounted, whereby the second flow path may sweep through a region at the periphery of the first flow path.

9. A waste collection vehicle according to claim 8, wherein a plurality of pivotally or rotatably mounted outlets are operable to create respective second flow paths which sweep in succession through a region at the periphery of the first flow path.