System and method for a helical pressure snubber

Patent metadata

Field	Value
Publication number	US-11041586-B2
Application number	US-201816224278-A
Country	US
Kind code	B2
Filing date	Dec 18, 2018
Priority date	Dec 18, 2018
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

A snubber includes a head portion, a shank portion, and a threaded portion. The shank portion is attached to the head portion, and the shank portion defines a shank diameter. The threaded portion is attached to the shank portion, and the threaded portion includes an external helical thread wrapped around a central shaft. The external helical thread defines a threaded diameter, and the central shaft defines a central shaft diameter. The shank diameter and the thread diameter are sized such that the shank portion and the threaded portion define at least one fluid flow path when the snubber is installed in a pressure sensor.

First claim

What is claimed is:

1. A snubber comprising:
a head portion having a top end and a bottom end, wherein the head portion defines at least one notch in the bottom end of the head portion, wherein the at least one notch extends partially into the head portion from the bottom end of the head portion such that the head portion defines a lip;
a shank portion attached to the head portion, the shank portion defining a shank diameter; and
a snubber threaded portion attached to the shank portion, the snubber threaded portion includes a snubber external helical thread wrapped around a central shaft, the snubber external helical thread defines a snubber threaded diameter and the central shaft defines a central shaft diameter, wherein the shank diameter and the snubber thread diameter are sized such that the shank portion and the snubber threaded portion define at least one fluid flow path when the snubber is installed in a pressure sensor, wherein the pressure sensor, the at least one notch, and the head portion define an entrance to the at least one fluid flow path, wherein the entrance is configured to channel a flow of a fluid to the at least one fluid flow path, and wherein the at least one notch is positioned between the lip and a first end of the fitting when the snubber is installed in a the pressure sensor such that the top end of the head portion completely covers the entrance.

2. The snubber of claim 1 , wherein the at least one notch is a rectangular notch.

3. The snubber of claim 1 , wherein the at least one notch extends radially inward toward the shank portion.

4. The snubber of claim 1 , wherein the head portion defines a plurality of notches in the bottom end of the head portion.

5. The snubber of claim 4 , wherein the plurality of notches are a plurality of v-shaped notches.

6. The snubber of claim 4 , wherein the plurality of notches are a plurality of radially extending channels.

7. The snubber of claim 4 , wherein the plurality of notches are a plurality of rectangular-shaped notches.

8. A pressure sensor comprising:
a transducer;
a fitting having a first end defining an opening and a fitting threaded portion therein, the fitting is coupled to the transducer, the fitting threaded portion includes an inner surface and a fitting internal helical thread positioned on the inner surface, wherein the first end further defines a plurality of notches, wherein the plurality of notches are a plurality of radially extending channels; and
a snubber positioned within the opening of the fitting threaded portion, the snubber comprising:
a head portion;
a shank portion attached to the head portion, the shank portion defines a shank diameter; and
a snubber threaded portion attached to the shank portion, the snubber threaded portion includes a snubber external helical thread wrapped around a central shaft, the snubber external helical thread defines a snubber thread diameter and the central shaft defines a central shaft diameter, wherein the shank diameter, the snubber thread diameter, and the central shaft diameter are sized such that the plurality of notches, the shank portion, and the snubber threaded portion define at least one fluid flow path when the snubber is installed in the fitting.

9. The pressure sensor of claim 8 , wherein the plurality of notches are a plurality of v-shaped notches.

10. The pressure sensor of claim 8 , wherein the plurality of notches are an entrance to the at least one fluid flow path.

11. The pressure sensor of claim 8 , wherein the snubber threaded portion defines an snubber inner thread diameter and an snubber outer thread diameter, the snubber outer thread diameter is greater than a fitting thread diameter such that a volume between the snubber outer thread diameter and the fitting thread diameter partially defines the at least one fluid flow path.

12. The pressure sensor of claim 8 , wherein the snubber threaded portion defines a snubber non-threaded portion and a snubber non-threaded diameter, the snubber non-threaded diameter is greater than the shank diameter such that a volume between the snubber non-threaded diameter and the shank diameter partially defines the at least one fluid flow path.

13. A pressure sensor comprising:
a transducer;
a fitting having a first end defining an opening and a fitting threaded portion therein, the fitting threaded portion includes an inner surface and an fitting internal helical thread positioned on the inner surface; and
a snubber positioned within the opening of the fitting, the snubber comprising:
a head portion defining at least one notch;
a shank portion attached to the head portion, the shank portion defines a shank diameter; and
a snubber threaded portion attached to the shank portion, the snubber threaded portion includes a snubber external helical thread wrapped around a central shaft, the snubber external helical thread defines a snubber thread diameter and the central shaft defines a central shaft diameter, wherein the shank diameter, the snubber thread diameter, and the central shaft diameter are sized such that the at least one notch, the shank portion, and the snubber threaded portion define at least one fluid flow path when the snubber is installed in the fitting, wherein the snubber threaded portion defines a snubber inner thread diameter and a snubber outer thread diameter, the snubber outer thread diameter is greater than a fitting thread diameter such that a volume between the snubber outer thread diameter and the fitting thread diameter partially defines the at least one fluid flow path.

14. The pressure sensor of claim 13 , wherein the head portion defines a plurality of notches.

15. The pressure sensor of claim 13 , wherein the head portion defines one notch.

16. The pressure sensor of claim 15 , wherein the notch is a rectangular notch.

17. The pressure sensor of claim 15 , wherein the notch extends radially inward toward the shank portion.

18. The pressure sensor of claim 13 , wherein the at least one notch is an entrance to the at least one fluid flow path.

19. The pressure sensor of claim 13 , wherein the snubber threaded portion defines a snubber non-threaded portion and a snubber non-threaded diameter, the snubber non-threaded diameter is greater than the shank diameter such that a volume between the snubber non-threaded diameter and the shank diameter partially defines the at least one fluid flow path.

20. A method of purging air from a pressure sensor, the pressure sensor including a transducer and a fitting coupled to the transducer, the method comprising:
filling a fitting threaded portion of the fitting with a fluid; and
inserting a snubber into the fitting threaded portion, the snubber includes a head portion, a shank portion, and a snubber threaded portion, the head portion defines at least one notch, wherein the at least one notch, the shank portion, and the snubber threaded portion define at least one fluid flow path when the snubber is inserted in the fitting, wherein the snubber threaded portion defines a snubber inner thread diameter and a snubber outer thread diameter, the snubber outer thread diameter is greater than a fitting thread diameter such that a volume between the snubber outer thread diameter and the fitting thread diameter partially defines the at least one fluid flow path.

21. A method of reducing pressure spikes in a transducer, the method comprising:
coupling a pressure sensor to a fluid system, the pressure sensor including a transducer, a fitting coupled to the trans

Assignees

• Boeing Co

Inventors

• Lindahl Gary M

Classifications

• G01L19/0618

  Overload protection · CPC title

• G01L19/0007

  Fluidic connecting means · CPC title

• F16F15/02

  Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems ({F16F15/005 takes precedence } ; layered products B32B; suppression of vibration in ships B63; {relieving load on bearings, using magnetic means F16C39/06}) · CPC title

• G01L19/00

  Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges · CPC title

• F16L41/008

  for connecting a measuring instrument · CPC title