# US 9,518,668 B2 · Check valve with backbone enhanced petals

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- Number: US 9,518,668 B2
- Document ID: US9518668B2
- Status: Granted
- Kind: B2
- Application number: 14/454,034
- Filed: 2014-08-07
- Published: 2016-02-11
- Granted: 2016-12-13
- Earliest claimed: 2014-08-07
- Assignees: Hamilton Sundstrand Corporation
- Applicants: Hamilton Sundstrand Corporation
- Inventors: Michael R. Barone
- Web page: https://patentgrep.com/patent/US9518668B2

## CPC

- F16K 15/038: {having a common hinge}
- Y10T 137/7839: Dividing and recombining in a single flow path
- Y10T 137/7898: Pivoted valves
- F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)}
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A check valve includes a base, two sidewalls extending from the base and a pin coupled between the two sidewalls. The valve also includes a flapper pivotably coupled to the pin to occupy respective open and closed positions in accordance with a pressure differential of a fluid flow across the check valve, the flapper including a plate and a backbone that is thicker than the base and the extends along an entire length of the plate.

## Claims

### Claim 1

A check valve, comprising:
a body;
two sidewalls extending from the body;
a pin coupled between the two sidewalls;
a flapper pivotably coupled to the pin to occupy respective open and closed positions in accordance with a pressure differential of a fluid flow across the check valve, the flapper including a flapper body formed as a plate and a backbone that is thicker than the flapper body and extends along an entire length of the flapper body;
an arcuate outer protrusion that connects opposing ends of the backbone and extends from an upper surface of the flapper body; and
a rib extending between and connecting the arcuate outer protrusion and the backbone, the rib being perpendicular to the backbone, wherein the rib portion includes an indentation that contacts a stop pin when the check valve is in the open position.

### Claim 2 (depends on 1)

The check valve of claim 1, wherein the flapper further includes at least two hinge components that couple the flapper to the pin.

### Claim 3 (depends on 2)

The check valve of claim 2, wherein the at least two hinge components are coupled directly to the backbone.

### Claim 4 (depends on 3)

The check valve of claim 3, wherein one of the at least two hinge components includes an extension that extends beyond an end of the backbone.

### Claim 5 (depends on 4)

The check valve of claim 4, wherein the extension contacts one of the two sidewalls.

### Claim 6 (depends on 1)

The check valve of claim 1, wherein the rib has a width defined as a distance from the backbone to the arcuate outer protrusion and that includes a rib portion that has a same height as a height of the backbone, the rib portion extending for less than an entire width of the rib.

### Claim 7 (depends on 1)

The check valve of claim 1, wherein a bottom of the plate includes a recess and includes an extension defining an outer periphery of the recess.

### Claim 8 (depends on 7)

The check valve of claim 7, wherein, when the check valve is in the closed position, the extension is the only portion of the flapper body that contacts the body.

### Claim 9

A check valve, comprising:
a body;
two sidewalls extending from the body;
a pin coupled between the two sidewalls; and
a flapper pivotably coupled to the pin to occupy respective open and closed positions in accordance with a pressure differential of a fluid flow across the check valve, the flapper including a flapper body formed as a plate and a backbone that is thicker than the flapper body and extends along an entire length of the flapper body,
wherein the flapper further includes at least two hinge components that couple the flapper to the pin, the at least two hinge components coupled directly to the backbone, and wherein one of the at least two hinge components includes an extension that extends beyond an end of the backbone.

### Claim 10 (depends on 9)

The check valve of claim 9, wherein the extension contacts one of the two sidewalls.

### Claim 11 (depends on 9)

The check of valve of claim 9, further including an arcuate outer protrusion that connects opposing ends of the backbone and extends from an upper surface of the flapper body.

### Claim 12 (depends on 11)

The check valve of claim 11, further including a rib extending between and connecting the arcuate outer protrusion and the backbone.

### Claim 13 (depends on 12)

The check valve of claim 12, wherein the rib is perpendicular to the backbone.

### Claim 14 (depends on 13)

The check valve of claim 13, wherein the rib has a width defined as a distance from the backbone to the arcuate outer protrusion and that includes a rib portion that has a same height as a height of the backbone, the rib portion extending for less than an entire width the rib.

### Claim 15 (depends on 13)

The check valve of claim 13, wherein the rib portion includes an indentation that contacts a stop pin when the check valve is in the open position.

### Claim 16 (depends on 9)

The check valve of claim 9, wherein a bottom of the plate includes a recess and includes an extension defining an outer periphery of the recess.

### Claim 17 (depends on 16)

The check valve of claim 16, wherein, when the check valve is in the closed position, the extension is the only portion of the flapper body that contacts the body.