Lubricant injector

Patent metadata

Field	Value
Publication number	US-11149792-B2
Application number	US-201515277538-A
Country	US
Kind code	B2
Filing date	Mar 20, 2015
Priority date	Mar 31, 2014
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

A lubricant injector includes a lubricant inlet, a lubricant outlet, a control piston and a metering piston. The control piston is configured to conduct lubricant from the lubricant inlet to the metering piston, and the metering piston is configured to pump the lubricant provided by the control piston to the at least one lubricant outlet. The metering piston includes a first metering chamber and a second metering chamber that are each connected to the at least one lubricant outlet. The lubricant injector further includes first and second lubricant channels, and in a first switching state of the control piston the lubricant inlet is connected via the first control space to the first lubricant channel and the second metering chamber, and in a second switching state the lubricant inlet is connected via the second control space to the second lubricant channel and the first metering chamber.

First claim

The invention claimed is:

1. A lubricant injector comprising at least one lubricant inlet, at least one lubricant outlet, a control piston and a metering piston, wherein the control piston is configured to conduct lubricant from the lubricant inlet to the metering piston and the metering piston is configured to pump the lubricant provided by the control piston to the at least one lubricant outlet, wherein the metering piston includes a first metering chamber and a second metering chamber that are each connected to the at least one lubricant outlet so that both from the first metering chamber and from the second metering chamber lubricant is conductible to the at least one lubricant outlet, and wherein
the lubricant injector further includes a first lubricant channel and a second lubricant channel, wherein the first lubricant channel is configured to connect the second metering chamber to the lubricant inlet or to the at least one lubricant outlet, and the second lubricant channel is configured to connect the first metering chamber to the lubricant inlet or to the at least one lubricant outlet wherein the control piston includes a first control space and a second control space, wherein in a first switching state of the control piston the lubricant inlet is connected via the first control space, but not via the second control space, to the first lubricant channel and the second metering chamber, and in a second switching state the lubricant inlet is connected via the second control space, but not via the first control space, to the second lubricant channel and the first metering chamber,
wherein the first lubricant channel is connected to the at least one lubricant outlet via a first lubricant-outlet channel, and the second lubricant channel is connected to the at least one lubricant outlet via a second lubricant-outlet channel, and
wherein the at least one lubricant outlet comprises a first lubricant outlet and a second lubricant outlet.

2. The lubricant injector according to claim 1 , wherein in the first switching state of the control piston the first metering chamber of the metering piston is connected to the at least one lubricant outlet via the second lubricant channel and the second control space and in the second switching state the second metering chamber of the metering piston is connected to the at least one lubricant outlet via the first lubricant channel and the first control space.

3. The lubricant injector according to claim 1 , wherein the first lubricant outlet is connected to the first lubricant-outlet channel and the second lubricant outlet is connected to the second lubricant-outlet channel.

4. The lubricant injector according to claim 1 , wherein the first lubricant outlet is connectable via the first lubricant-outlet channel the first control space, and the first lubricant channel to the second metering chamber, and the second lubricant outlet is connectable via the second lubricant-outlet channel, the second control space, and the second lubricant channel to the first metering chamber.

5. The lubricant injector according to claim 1 , wherein at least one further lubricant outlet is provided at the first and/or second lubricant-outlet channel.

6. The lubricant injector according to claim 1 , wherein a screw thread, a snap connection, and/or a plug connection, is provided on the at least one lubricant outlet with which the at least one lubricant outlet is connectable to a valve assembly, a closure element or a connecting element for connecting a lubricant line.

7. The lubricant injector according to claim 6 , wherein at least one lubricant outlet comprises a spring space for the control-piston preload element.

8. The lubricant injector according to claim 1 , further including a return spring configured to bias the control piston toward the first switching state.

9. The lubricant injector according to claim 1 , wherein the control piston includes a control-piston workspace that is impingeable with lubricant in order to shift the control piston into the second switching state against a preload of a preload element.

10. The lubricant injector according to claim 9 , wherein the control-piston workspace is connected to a lubricant switchover pressure channel, which is configured to conduct lubricant into the control-piston workspace if a certain lubricant pressure abuts on the lubricant inlet and/or in the first control space of the control piston.

11. The lubricant injector according to claim 10 , wherein the lubricant switchover pressure channel is connected to the lubricant inlet and/or the first control space of the control piston.

12. The lubricant injector according to claim 1 , wherein at least the first and the second lubricant outlet are disposed on different sides of the lubricant injector, or at least the first and the second lubricant outlet are disposed on the same side of the lubricant injector.

13. The lubricant injector according to claim 1 , wherein at least one metering chamber is connectable using an adjusting screw via which a stroke of the metering piston and/or of the control piston is adjustable.

14. A lubricant injector block with at least two lubricant injectors according to claim 1 connected in series.

15. The lubricant injector block according to claim 14 , including a lubricant central channel on the lubricant injector block via which the at least two lubricant inlets of the at least two lubricant injectors are supplyable with lubricant.

16. The lubricant injector block according to claim 15 , including a central lubricant inlet and a central lubricant outlet on the lubricant injector block that are connected to each other via the lubricant central channel, wherein the central lubricant outlet is closable with a closure element or connectable to a further lubricant injector or a further lubricant injector block.

17. A lubricant injector comprising at least one lubricant inlet, at least one lubricant outlet, a control piston and a metering piston, wherein the control piston is configured to conduct lubricant from the lubricant inlet to the metering piston and the metering piston is configured to pump the lubricant provided by the control piston to the at least one lubricant outlet, wherein the metering piston includes a first metering chamber and a second metering chamber that are each connected to the at least one lubricant outlet so that both from the first metering chamber and from the second metering chamber lubricant is conductible to the at least one lubricant outlet, and wherein
the lubricant injector further includes a first lubricant channel and a second lubricant channel, wherein the first lubricant channel is configured to connect the second metering chamber to the lubricant inlet or to the at least one lubricant outlet, and the second lubricant channel is configured to connect the first metering chamber to the lubricant inlet or to the at least one lubricant outlet wherein the control piston includes a first control space and a second control space, wherein in a first switching state of the control piston the lubricant inlet is connected via the first control space to the first lubricant channel and the second metering chamber, and in a second switching state the lubricant inlet is connected via the second control space to the second lubricant channel and the first metering chamber,
wherein the first lubricant channel is connected to the at least one lubricant outlet via a first lubricant-outlet channel, and the second lubricant channel is connected to the at least one lubricant outlet via a second lubricant-outlet channel,
wherein the at le

Assignees

• Skf Lubrication Systems Germany

Inventors

• Kreutzkaemper Juergen
• Kannegiesser Herbert
• Schneider Edward
• Trinkel Ralf

Classifications

• F16N25/02 Primary

  with reciprocating distributing slide valve · CPC title

• F16C2204/60

  Ferrous alloys, e.g. steel alloys · CPC title

• F16N27/02

  Gating equipment (multiple-way valves F16K; metering cocks G01F) · CPC title

• F16C33/4647 Primary

  made from metal, e.g. two cast parts joined by rivets · CPC title

• F16C43/04

  Assembling rolling-contact bearings · CPC title