US 11,859,668 B2
Lubricant injector
Juergen Kreutzkaemper, Waibstadt-Daisbach (DE); Herbert Kannegiesser, Duesseldorf (DE); Edward Schneider, Ketsch (DE); and Ralf Trinkel, Frankenthal (DE)
Assigned to SKF LUBRICATION SYSTEMS GERMANY GMBH, Walldorf (DE)
Filed by SKF Lubrication Systems Germany GmbH, Walldorf (DE)
Filed on Sep. 1, 2021, as Appl. No. 17/464,097.
Application 17/464,097 is a continuation of application No. 15/277,538, granted, now 11,149,792, previously published as PCT/EP2015/055921, filed on Mar. 20, 2015.
Claims priority of application No. 102014205975.5 (DE), filed on Mar. 31, 2014.
Prior Publication US 2021/0404517 A1, Dec. 30, 2021
Int. Cl. F16C 33/46 (2006.01); F16N 25/02 (2006.01); F16N 27/02 (2006.01); F16C 43/04 (2006.01)
CPC F16C 33/4647 (2013.01) [F16C 43/04 (2013.01); F16N 25/02 (2013.01); F16N 27/02 (2013.01); F16C 2204/60 (2013.01); F16C 2240/70 (2013.01)] 20 Claims
OG exemplary drawing
 
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,
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 lubricant outlet, and the second lubricant channel is configured to connect the first metering chamber to the lubricant inlet or to the 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, and
wherein a return spring located in the lubricant outlet biases the control piston toward the first switching state.