US 11,686,639 B2Granted

Device for protecting a sensor's membrane from electromagnetic radiation

AssigneeKistler Holding AG

InventorChristian Heer

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Abstract

A protective device for a membrane of a sensor that detects a physical parameter acting upon the membrane includes a hollow main body that elongates in a direction along a longitudinal axis. The main body is open at one opposite end of the main body along the longitudinal axis, and at the end of the main body opposite the open end the protective device includes a bottom in which is defined a passage through which the medium is able reach the membrane when the protective device is attached to the sensor. The passage is defined in part by a wall that is configured so that the electromagnetic radiation propagating in the passage cannot reach the membrane without being reflected at least once on the wall.

Claims14

Dependent claims

A protective device for a membrane of a sensor that detects a physical parameter acting on the membrane via a fluid medium, the protective device comprising:

a hollow main body that elongates along a longitudinal direction and defines an open end at one end of the main body, wherein the open end is configured to connect to the sensor and configured to surround the membrane when the hollow main body is connected to the sensor;
a single plate disposed at an end of the main body that is disposed along the longitudinal direction opposite the open end of the main body, the single plate extending in a direction perpendicular to the longitudinal direction and having a membrane side disposed to face the membrane when the hollow main body is connected to the sensor, the single plate defining a medium side disposed opposite the membrane side of the single plate;
wherein the single plate defines a plurality of passages;
wherein each of the plurality of passages is defined by a respective wall that extends contiguously from the medium side of the single plate and completely through the single plate through the membrane side of the single plate and thereby to function as a separate path for the fluid medium to reach the membrane when the protective device is attached to the sensor;
wherein the respective wall of a first one of the plurality of passages is defined by a surface that extends continuously through the single plate from the membrane side of the single plate to the medium side of the single plate;
wherein the surface of the respective wall of the first one of the plurality of passages has a first section that extends along a first direction that diverges away from a longitudinal axis that is aligned with the longitudinal direction;
and
wherein the surface of the respective wall of the first one of the plurality of passages has a second section that extends contiguously in the longitudinal direction with the first section while extending along a second direction that diverges away from the first direction to define a zig-zag path through the single plate.

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Dependencies are inferred from the claim text.

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Abstract

A protective device for a membrane of a sensor that detects a physical parameter acting on the membrane via a fluid medium, the protective device comprising:

a hollow main body that elongates along a longitudinal direction and defines an open end at one end of the main body, wherein the open end is configured to connect to the sensor and configured to surround the membrane when the hollow main body is connected to the sensor;
a single plate disposed at an end of the main body that is disposed along the longitudinal direction opposite the open end of the main body, the single plate extending in a direction perpendicular to the longitudinal direction and having a membrane side disposed to face the membrane when the hollow main body is connected to the sensor, the single plate defining a medium side disposed opposite the membrane side of the single plate;
wherein the single plate defines a plurality of passages;
wherein each of the plurality of passages is defined by a respective wall that extends contiguously from the medium side of the single plate and completely through the single plate through the membrane side of the single plate and thereby to function as a separate path for the fluid medium to reach the membrane when the protective device is attached to the sensor;
wherein the respective wall of a first one of the plurality of passages is defined by a surface that extends continuously through the single plate from the membrane side of the single plate to the medium side of the single plate;
wherein the surface of the respective wall of the first one of the plurality of passages has a first section that extends along a first direction that diverges away from a longitudinal axis that is aligned with the longitudinal direction;
and
wherein the surface of the respective wall of the first one of the plurality of passages has a second section that extends contiguously in the longitudinal direction with the first section while extending along a second direction that diverges away from the first direction to define a zig-zag path through the single plate.

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