Remanufacturing a transmission pump assembly

Patent metadata

Field	Value
Publication number	US-10180137-B2
Application number	US-201514933027-A
Country	US
Kind code	B2
Filing date	Nov 5, 2015
Priority date	Nov 5, 2015
Publication date	Jan 15, 2019
Grant date	Jan 15, 2019

Abstract

A transmission pump is be removed from service and remanufactured into a remanufactured transmission pump. A first gear assembly is removed from the pump. A bore of the pump is machined from a first depth to a greater second depth. A second gear assembly is installed in the machined bore. The second gear assembly has a same horizontal geometry and a greater axial depth than the first gear assembly.

First claim

The invention claimed is:

1. A method of remanufacturing a pump for an automotive transmission comprising:
removing a first gear assembly, having first inner and outer gears, from the pump;
machining a bore of the pump from a first depth to a greater second depth;
installing a second gear assembly, having second inner and outer gears, in the machined bore, the second gear assembly having a same horizontal geometry and a greater axial depth than the first gear assembly.

2. The method of claim 1 wherein a first difference in the axial depth between first chambers in the first gear assembly and second chambers in the second gear assembly is equal to a second difference between the first and second bore depths.

3. The method of claim 1 wherein the second gear assembly has a greater gear thickness than the first gear assembly.

4. The method of claim 1 wherein a first difference in the axial depth between first chambers in the first gear assembly and second chambers in the second gear assembly is equal to a second difference in gear thickness between the first and second gear assemblies.

5. The method of claim 1 wherein the pump is a gerotor pump.

6. The method of claim 1 wherein first chambers are formed between the first inner and outer gears and the second chambers are formed between the second inner and outer gears.

7. The method of claim 1 further comprising:
disassembling the transmission to access the pump to remove the first gear assembly;
reassembling the transmission after the second gear assembly is installed.

8. The method of claim 1 further comprising:
removing the transmission from service before removing the first gear assembly;
returning the transmission to service after installing the second gear assembly.

9. The method of claim 1 wherein the horizontal geometry is perpendicular to the axial depth.

10. The method of claim 1 wherein the horizontal geometry is dimensions, perpendicular to the axial depth, between the first inner and outer gears of the first gear assembly and between the second inner and outer gears of the second gear assembly.

11. A method of remanufacturing a pump for an automotive transmission comprising:
disassembling a removed from service transmission to access the pump;
removing inner and outer gears from a bore of the pump;
machining the bore from a first depth to a greater second depth;
installing new inner and outer gears in the machined bore, wherein the new inner and outer gears have a same horizontal geometry, a greater axial depth than the removed inner and outer gears, the horizontal geometry is dimensions, perpendicular to the axial depth, between the removed inner and outer gears and between the new inner and outer gears; and
reassembling the transmission after the new inner and outer gears are installed.

12. The method of claim 11 wherein the pump is a gerotor pump.

13. The method of claim 11 wherein a first difference in the axial depth between the removed inner and outer gears and the new inner and outer gears is equal to a second difference between the first and second bore depths.

14. A method of remanufacturing a pump for an automotive transmission comprising:
removing a first gear assembly from the pump;
machining a bore of the pump from a first depth to a greater second depth;
installing a second gear assembly in the machined bore, the second gear assembly having a same horizontal geometry and a greater axial depth than the first gear assembly, wherein the horizontal geometry is dimensions, perpendicular to the axial depth, between first inner and outer gears of the first gear assembly and between second inner and outer gears of the second gear assembly.

Assignees

• Ford Global Tech Llc

Inventors

• Waterbury Edwin J

Classifications

• F04C2/084

  Toothed wheels · CPC title

• F04C2230/80

  Repairing methods · CPC title

• F04C2/102 Primary

  the two members rotating simultaneously around their respective axes · CPC title

• F04C2240/20

  Rotors · CPC title

• F04C2/086

  Carter · CPC title