Depth gauge seal

Patent metadata

Field	Value
Publication number	US-2022349473-A1
Application number	US-202217730757-A
Country	US
Kind code	A1
Filing date	Apr 27, 2022
Priority date	Apr 29, 2021
Publication date	Nov 3, 2022
Grant date	—

Abstract

Provided is a seal ( 21, 121 ) for a depth gauge ( 1 ) of axis of revolution (Z) including a radially inner flank ( 213, 223 ) and a radially outer flank ( 214, 224 ), such that the radially inner flank ( 213, 223 ) of said seal ( 21, 121 ) has a height (h 1 ) greater than a height (h 2 ) of the radially outer flank ( 214, 224 ).

First claim

1 . A seal ( 21 , 121 ) for a depth gauge ( 100 ) of axis of revolution (Z) comprising a radially inner flank ( 213 , 223 ) and a radially outer flank ( 214 , 224 ), characterised in that the radially inner flank ( 213 , 223 ) of said seal ( 21 , 121 ) has a height (h 1 ) greater than a height (h 2 ) of the radially outer flank ( 214 , 224 ).

2 . The seal ( 21 ) for a depth gauge ( 100 ) according to claim 1 , wherein said seal ( 21 ) has a section (S), along a radial cutting plane, having a polygonal shape.

3 . The seal ( 21 ) for a depth gauge ( 100 ) according to claim 2 , wherein said section (S) has a trapezoidal shape comprising two parallel sides, the two parallel sides of the trapezium being formed by the radially outer flank ( 214 ) and the radially inner flank ( 213 ).

4 . The seal ( 21 ) for a depth gauge ( 100 ) according to claim 2 , wherein said section (S) has a top face ( 212 ) comprising at least one inclined planar portion with respect to a bottom face ( 211 ).

5 . The seal ( 21 ) for a depth gauge ( 100 ) according to claim 4 , wherein said top face ( 212 ) comprises a first planar portion ( 212 a ) parallel with a bottom face ( 211 ) and an inclined planar portion ( 212 b ) with respect to said bottom face ( 211 ).

6 . The seal ( 21 ) for a depth gauge ( 100 ) according to claim 4 , wherein said at least one inclined planar portion ( 212 b ) has an inclination with respect to said bottom face ( 211 ), said inclination being greater than 0° and less than or equal to 45°.

7 . The seal ( 121 ) for a depth gauge ( 100 ) according to claim 1 , wherein said seal ( 121 ) has a section (S′), along a radial cutting plane, having a quarter-circle shape.

8 . The seal ( 21 , 121 ) for a depth gauge ( 100 ) according to claim 1 , wherein seal is made of elastomer, preferably of nitrile.

9 . The seal ( 21 , 121 ) for a depth gauge ( 100 ), according to claim 1 , said depth gauge comprising a pressure sensor ( 17 ) with a deformable membrane ( 12 ), wherein said seal ( 21 , 121 ) is configured to be compressed against said deformable membrane ( 12 ) of said pressure sensor ( 17 ).

10 . A depth gauge ( 100 ) comprising:
a case ( 6 ) closed by a bottom ( 28 ), said bottom ( 28 ) delimiting a pressure chamber ( 29 ) in fluidic communication with the outside of the depth gauge ( 100 ), a pressure sensor ( 17 ) comprising a deformable membrane ( 12 ) disposed above said pressure chamber ( 29 ); a seal ( 21 , 121 ) according to claim 1 , said seal ensuring the tightness of said case ( 6 ) in relation to said pressure chamber ( 29 ).

11 . The depth gauge ( 100 ) according to claim 10 , wherein said seal ( 21 , 121 ) is compressed and forms a support element of said deformable membrane ( 12 ).

12 . The depth gauge ( 100 ) according to claim 11 , wherein said seal ( 21 , 121 ) is disposed at a peripheral region ( 13 ) of said deformable membrane ( 12 ).

13 . The depth gauge ( 100 ) according to claim 12 , wherein said peripheral region ( 13 ) of the deformable membrane ( 12 ) can pivot pressing on the seal ( 21 , 121 ) when the deformable membrane ( 12 ) is deformed under the effect of an increase in pressure in the pressure chamber ( 29 ).

14 . The depth gauge ( 100 ) according to claim 10 , wherein said bottom ( 28 ) is devoid of a channel or a groove for housing said seal ( 21 , 121 ).

15 . The depth gauge ( 100 ) according to claim 10 , wherein said bottom ( 28 ) comprises a top face ( 28 a ) delimiting a bottom portion of said pressure chamber ( 29 ), said seal ( 21 , 121 ) being positioned directly on the top face ( 28 a ) of the bottom ( 28 ) delimiting said bottom portion of said pressure chamber ( 29 ).

16 . The depth gauge ( 100 ) according to claim 15 , wherein said depth gauge ( 100 ) comprises an indexing member ( 31 ) arranged on said top face ( 28 a ) of the bottom ( 28 ) to facilitate the centering of said seal ( 21 , 121 ).

17 . The depth gauge ( 100 ) according to claim 10 , wherein said seal ( 21 , 121 ) delimits a peripheral portion of said pressure chamber ( 29 ).

18 . The depth gauge ( 100 ) according to claim 10 , wherein said deformable membrane ( 12 ) is formed by a metallic disk or by an amorphous metal alloy disk.

19 . Timepiece comprising a depth gauge ( 100 ) according to claim 10 .

Assignees

• Blancpain Sa

Inventors

• Thuet Arnaud

Classifications

• G04B47/066

  with a pressure sensor · CPC title

• G01L19/0046

  using isolation membranes (G01L13/026 and G01L19/0645 take precedence) · CPC title

• G01L19/147 Primary

  Details about the mounting of the sensor to support or covering means · CPC title

• F16J15/021

  with elastic packing (F16J15/08 takes precedence) · CPC title

• G01L19/149

  of immersion sensor, e.g. where the sensor is immersed in the measuring medium or for in vivo measurements, e.g. by using catheter tips · CPC title