Protective device
AssigneeKistler Holding AG
InventorCHRISTIAN HEER
Life of this patent
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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.
Claims16
A protective device for a membrane of a sensor that detects a physical parameter being transmitted through a medium, which physical parameter acts upon the membrane, the protective device comprising:
- a hollow main body that elongates in a direction along a longitudinal axis defines an open end at one end of the main body;
- a bottom disposed at an end of the main body that is disposed along the longitudinal axis opposite the open end of the main body, the bottom defining a membrane side disposed facing the membrane, the bottom defining a medium side disposed opposite the membrane side of the bottom;
- wherein the bottom defines a passage through which the medium is able to reach the membrane when the protective device is attached to the sensor;
- and wherein the passage is defined in part by a wall that is configured so that electromagnetic radiation propagating from the medium side in the passage must be reflected at least once on the wall of the passage to reach the membrane.
A sensor for detecting a physical parameter that is transmitted by a medium, the sensor comprising:
- a housing;
- a membrane carried by the housing and configured and disposed to be acted upon by the physical parameter;
- a protective device attached to the sensor;
- wherein the protective device includes a hollow main body that elongates in a direction along a longitudinal axis and defines an open end at one end of the main body;
- a bottom disposed at an end of the main body that is disposed along the longitudinal axis opposite the open end of the main body, the bottom defining a membrane side disposed facing the membrane, the bottom defining a medium side disposed opposite the membrane side of the bottom;
- wherein the bottom defines a passage through which the medium is able to reach the membrane when the protective device is attached to the housing;
- and wherein the passage is defined by a wall that is configured so that electromagnetic radiation propagating from the medium side in the passage must be reflected at least once on the wall of the passage to reach the membrane.
A method for producing a protective device according to the following steps:
- arranging a first measure of granular material in a first pattern that defines a plurality of open areas;
- using a laser beam to form the first measure of granular material in a first layer that fixes the first pattern of open areas;
- arranging a second measure of granular material onto the first layer in a second pattern that defines a plurality of open areas wherein the open areas of the second pattern are only partially coterminous with the open areas of the first pattern;
- and
- using the laser beam to form the second measure of granular material in a second layer that fixes the second pattern of open areas.
Dependencies are inferred from the claim text.