Progressive distributor

Patent metadata

Field	Value
Publication number	US-11639770-B2
Application number	US-202117473168-A
Country	US
Kind code	B2
Filing date	Sep 13, 2021
Priority date	Oct 6, 2020
Publication date	May 2, 2023
Grant date	May 2, 2023

Abstract

A progressive distributor includes a housing block with an inlet bore and outlet bores and first and second metering pistons in first and second piston bores. Each piston defines first and second annular workspaces and delimits first and second metering spaces at the ends of each piston, the first and second piston bores each having a central axis and being disposed one atop the other so that their central axes are parallel to each other and located in a central plane. Switching bores connect the metering spaces of the first metering piston to the workspaces of the second metering piston, and the switching bores are located on opposite sides of the central plane.

First claim

What is claimed is:

1. A progressive distributor for lubricant comprising:
a housing block including a lubricant inlet bore via which lubricant is introducible into the progressive distributor,
a plurality of lubricant outlet bores, via which a metered quantity of lubricant is dispensable to a consumer connected to the respective lubricant outlet bore,
a first metering piston mounted in a first piston bore in the housing and a second metering piston mounted in a second piston bore in the housing, each of the first and second metering pistons defining with the respective first and second piston bores a first annular workspace and a second annular workspace for the lubricant, the first and second piston bores each including a first metering space and a second metering space at opposite ends of the respective first and second piston bores to allow axial displacement of the first and second pistons, the first and second piston bores each having a central axis and being disposed one atop the other so that the central axes are parallel to each other and located in a central plane,
a first switching bore connecting the first metering space of the first piston bore to the second annular workspace of the second metering bore, and
a second switching bore connecting the second metering space of the first piston bore to the first annular workspace of the second metering bore,
wherein the first switching bore is located on a first side of the central plane, and the second switching bore is located on the second side of the central plane.

2. The progressive distributor according to claim 1 , wherein a central axis of each of the first and second switching bores is parallel to the central plane.

3. The progressive distributor according to claim 1 ,
wherein a portion of the central axis of the first switching bore between the first metering space of the first piston bore and the second annular workspace of the second piston bore does not intersect the central plane, and
wherein a portion of the central axis of the second switching bore between the second metering space of the first piston bore to the first annular workspace of the second piston bore does not intersect the central plane.

4. The progressive distributor according to claim 3 , wherein a volume of each switching bore is smaller than a volume of the lubricant that is moved by a piston stroke.

5. The progressive distributor according to claim 1 ,
wherein the piston bore is a through-bore extending through the housing and is closed in a fluid-tight manner at each end by a closure cap releasably connected to the housing, and
wherein each closure cap defines an end of the metering space.

6. The progressive distributor according to claim 5 ,
wherein a diameter of the first piston bore in a region of the metering space is larger than an offset of the first switching bore from the central plane and larger than an offset of the second switching bore from the central plane.

7. The progressive distributor according to claim 1 ,
including an auxiliary bore fluidically connecting the workspace of the first metering piston and the first switching bore.

8. The progressive distributor according to claim 7 ,
wherein the auxiliary bore is perpendicular to the central plane, and
wherein the auxiliary bore is closed in a fluid-tight manner by an auxiliary closure cap.

9. The progressive distributor according to claim 1 ,
including a third metering piston mounted in a third piston bore in the housing and a fourth metering piston mounted in a fourth piston bore in the housing,
wherein the first and second metering pistons are disposed in a first layer and the third and fourth metering pistons are disposed in a second layer above the first layer.

10. The progressive distributor according to claim 1 , wherein a volume of each switching bore is smaller than a volume of the lubricant that is moved by a piston stroke.

Assignees

• Skf Lubrication Systems Germany

Inventors

• Hess Dieter
• Kreutzkaemper Juergen
• Mandera Markus
• Schoenfeld Andreas
• Schuermann Stefan
• Zahn Dennis

Classifications

• F16N25/02 Primary

  with reciprocating distributing slide valve · CPC title

• F16N25/00 Primary

  Distributing equipment {with or without proportioning devices} · CPC title

• F16N25/04 Primary

  with rotary distributing member (combined with oil pump F16N13/22) · CPC title