Apparatus for recycling engine lubricating oil

• US 4,128,140 A
• Filed: 03/24/1977
• Issued: 12/05/1978
• Est. Priority Date: 03/25/1976
• Status: Expired due to Term

• Current Assignee: Post Office Limited (International Distributions Services plc)
• Original Assignee: Post Office Limited (International Distributions Services plc)
• Inventors: Riches, Stanley J. W.
• Primary Examiner(s): Brown, David H.
• Application Number:
  US05/781,052
• Time in Patent Office: 621 Days
• Field of Search: 184/1.5, 184/6.24, 184/105 R
• US Class Current: 184/1.5
• CPC Class Codes: F01M 11/0458 Lubricant filling and draining
• CPC Class Codes: F16N 27/00 Proportioning devices liquid meters G01F
• CPC Class Codes: F16N 37/00 Equipment for transferring lubricant from one container to another

Abstract

Equipment for draining and refilling the lubricating oil sump of a motor vehicle comprises a large capacity main oil reservoir. Inlet means to the reservoir from the sump include a vessel which is evacuated to suck oil from the sump and pressurized to cause the oil to flow into the reservoir. Oil rejuvenating means are included in the inlet. Means are provided for discharging a metered dose of oil back to the sump from the reservoir.

Claims

1. Equipment for draining and refilling the lubricating oil sump of a motor vehicle, such equipment comprising a main oil reservoir with a capacity substantially greater than that of the sump, oil inlet means including a hose line and an inlet pipe for connecting the interior of the sump to the reservoir, and an oil collecting vessel having an inlet and an outlet and being of greater capacity then said sump but less then said reservoir interposed in said oil inlet means, valve means communicating with the inlet and the outlet of said oil collecting vessel, means for reducing and increasing air pressure in the oil collecting vessel, said last named means upon reducing air pressure causing said inlet valve to open causing oil to flow through said hose line and inlet pipe into said oil collecting vessel while preventing flow from said collecting vessel to said reservoir and upon increasing air pressure in said oil collecting vessel to cause oil to flow through said outlet pipe into said reservoir while closing the valve means communicating with the oil inlet of said vessel, oil outlet means communicating with said reservoir and connecting with said reservoir and connecting said reservoir to the vehicle sump and metered oil discharge means for causing metered doses of oil from the reservoir to flow through the oil outlet means.

2. Equipment as claimed in claim 1 including means for removing liquid and solid impurities intermediate the oil-collecting vessel and the main reservoir.

3. Equipment as claimed in claim 1 including means for diverting oil from the equipment intermediate the oil-collecting vessel and the main reservoir.

4. Equipment as claimed in claim 1 wherein the oil-discharging means comprises a separate oil pumping device.

5. Equipment as claimed in claim 1 wherein the said means for reducing and raising pressure in the oil-collecting vessel are selectively actuable to raise pressure in an oil discharge vessel selectively communicable with the main reservoir and to discharge oil from said oil discharging vessel back to the vehicle sump.

6. Equipment as claimed in claim 1 wherein the said means for reducing pressure is a venturi device.