Diaphragm non-return valve for a compressed air system

Patent metadata

Field	Value
Publication number	US-10876643-B2
Application number	US-201716329956-A
Country	US
Kind code	B2
Filing date	Jun 20, 2017
Priority date	Sep 2, 2016
Publication date	Dec 29, 2020
Grant date	Dec 29, 2020

Abstract

A diaphragm non-return valve for a compressed air system is provided herein. The diaphragm non-return valve comprises a housing, a purge output formed on the housing, a valve seat formed on the purge output, and a diaphragm disc which is attached to the housing and which lies on the valve seat in the closed state of the non-return valve and is lifted off the valve seat in the open state of the non-return valve. The diaphragm disc is attached to the housing by a clamping bracket, and the clamping bracket has holding component via which the clamping bracket is attached to the outlet-side end of the purge output.

First claim

What is claimed is:

1. A diaphragm non-return valve for a compressed air system, the diaphragm non-return valve comprising a housing, a purge output disposed on the housing, a valve seat disposed on the purge output, and a diaphragm disc attached to the housing and which lies on the valve seat in a closed state of the non-return valve and is lifted off the valve seat in an open state of the non-return valve, wherein the diaphragm disc is attached to the housing by a clamping bracket, wherein the clamping bracket has a holding component via which the clamping bracket is attached to an outlet-side end of the purge output, and wherein the holding component of the clamping bracket is formed as a latching clip which can be connected to a catch on an outlet pipe arranged on the housing, or that mechanically conversely, the outlet pipe comprises a latching clip and the clamping bracket has a catch, wherein the latching clip and the catch can be connected together.

2. The diaphragm non-return valve as claimed in claim 1 , wherein the holding component of the clamping bracket radially outwardly surrounds an axial outer edge of the outlet pipe, and are provided with a radially inwardly oriented latching lug which, in mounted state, engage in latching depressions in an outer wall of the outlet pipe.

3. The diaphragm non-return valve as claimed in claim 2 , wherein a ring groove which is open in a direction towards the diaphragm disc is formed in a floor of the valve seat of the non-return valve, and a floor of the ring groove is arranged with a slope or at least on a level with a floor of the latching depressions in the axial outer edge of the outlet pipe which receive the latching lugs of the clamping bracket.

4. The diaphragm non-return valve as claimed in claim 2 , wherein an annular groove which is open in a direction towards the diaphragm disc is formed in a floor of the valve seat of the non-return valve, and a floor of the ring groove is connected, with a slope or at least on the same level, to a drainage opening in the housing which is arranged radially inside the valve seat.

5. The diaphragm non-return valve as claimed in claim 1 , wherein, in a region of the clamping bracket, the axial outer edge of the outlet pipe defines two diagonally opposed recesses which, in mounted state, receive the holding component of the clamping bracket.

6. The diaphragm non-return valve as claimed in claim 1 , wherein the clamping bracket is formed of a resilient plastic, and is produced as a plastic injection molding.

7. The diaphragm non-return valve as claimed in claim 1 , wherein the clamping bracket comprises at least two longitudinal webs which are connected together via the holding component and at least one transverse web.

8. The diaphragm non-return valve as claimed in claim 7 , wherein the longitudinal webs of the clamping bracket are each stiffened by a longitudinal rib.

9. The diaphragm non-return valve as claimed in claim 7 , wherein, radially in the center, the clamping bracket has the transverse web formed as an axial peg which connects the two longitudinal webs radially together, and two axially protruding latching pins are formed on the clamping bracket with a radial spacing from the peg.

10. The diaphragm non-return valve as claimed in claim 9 , wherein the diaphragm disc is fixedly connected to the clamping bracket and the latching pin of the clamping bracket is fixedly inserted in the depression of the latching studs.

11. The diaphragm non-return valve as claimed in claim 10 , wherein, at the purge output, the housing has two purge channels oriented parallel to each other and separated from each other by a housing web, the housing web having an axial bore radially on an interior of the housing web, the housing web having two axially oriented blind holes radially spaced from the axial bore, wherein the axial bore in the housing web serves to receive the peg of the clamping bracket pushed through the diaphragm disc, and wherein the axially oriented blind holes in the housing web are provided to receive the latching studs of the diaphragm disc.

12. The diaphragm non-return valve as claimed in claim 11 , wherein, on both longitudinal webs of the clamping bracket, at least one respective axially outwardly bent wing is arranged, against which two free portions of the diaphragm disc, which are not clamped between the clamping bracket and the housing web, lie without buckling in their open position.

13. The diaphragm non-return valve as claimed in claim 11 , wherein the housing web is formed from three individual webs which are arranged spaced from and parallel to each other, and wherein a central individual web of the three individual webs, disposed radially centrally relative to the others of the three individual webs, has a hollow cylindrical ring web for receiving the axial peg of the clamping bracket.

14. The diaphragm non-return valve as claimed in claim 1 , wherein the diaphragm disc is fixedly connected to the clamping bracket, wherein the clamping bracket, on one of its axial sides, covers a radial center of the diaphragm disc.

15. The diaphragm non-return valve as claimed in claim 1 , wherein, before installation, the diaphragm disc has a pre-curvature appearing curved approximately in a U-shape when viewed from an end onto a radial peripheral face of the diaphragm disc.

16. The diaphragm non-return valve as claimed in claim 1 , wherein, on an underside of the clamping bracket pointing towards the diaphragm disc, a plurality of spot-like protrusions are formed which are pressed into the diaphragm disc in the assembled state of the non-return valve.

17. A diaphragm non-return valve for a compressed air system, the diaphragm non-return valve comprising a housing, a purge output disposed on the housing, a valve seat disposed on the purge output, and a diaphragm disc attached to the housing and which lies on the valve seat in a closed state of the non-return valve and is lifted off the valve seat in an open state of the non-return valve, wherein the diaphragm disc is attached to the housing by a clamping bracket, wherein the clamping bracket has a holding component via which the clamping bracket is attached to an outlet-side end of the purge output, and wherein, to increase elasticity, the holding component of the clamping bracket is segmented with at least one separating slot in the region of the latching lug.

18. A diaphragm non-return valve for a compressed air system, the diaphragm non-return valve comprising a housing, a purge output disposed on the housing, a valve seat disposed on the purge output, and a diaphragm disc attached to the housing and which lies on the valve seat in a closed state of the non-return valve and is lifted off the valve seat in an open state of the non-return valve, wherein the diaphragm disc is attached to the housing by a clamping bracket, wherein the clamping bracket has a holding component via which the clamping bracket is attached to an outlet-side end of the purge output, wherein the clamping bracket comprises at least two longitudinal webs which are connected together via the holding component and at least one transverse web, and wherein in the radial center, the diaphragm disc defines a bore and, radially spaced therefrom, further comprises two axially protruding latching studs which each having a depression.

Assignees

• Wabco Europe Bvba

Inventors

• Kaufmann Michael
• Sieker Armin
• Stephan Arne
• Wichmann Olaf

Classifications

• F16K15/14 Primary

  with flexible valve members · CPC title