Pressure sensor isolated within housing having integral diaphragm and method of making same
AssigneeLucas NovaSensor
InventorEdward F. Koen
Life of this patent
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Abstract
A pressure transducer is provided for measuring pressure within a measurand environment, the transducer comprising a header which includes a substantially nondeformable molded housing formed from a first thermoplastic material defining a cavity and first and second openings into the cavity and a resilient diaphragm formed from the first thermoplastic material molded to the housing and spanning the first opening; a pressure sensing device disposed within the housing; and a pressure transfer medium disposed within the cavity so as to couple the diaphragm to the pressure sensing device.
Claims23
A pressure transducer for measuring pressure within a measurand environment comprising:
- a header which includes a substantially nondeformable molded housing formed from first material having a thermoplastic base material defining a cavity;
- said cavity having a first opening formed therein;
- a resilient diaphragm formed from a second material having the same thermoplastic base material as said first material;
- said diaphragm molded to the said housing and spanning the first opening;
- and
- a pressure sensing device secured in place within the housing;
- and
- a pressure transfer medium disposed within the cavity so as to couple the diaphragm to said pressure sensing device.
A pressure transducer for measuring pressure within a measurand environment comprising:
- a header which includes a substantially nondeformable molded housing formed from a first material having a thermoplastic base material defining a cavity and a first opening into the cavity and a resilient diaphragm formed from a second material having the same base material as the first material molded to the housing and spanning the first opening;
- a pressure sensing device secured in place within the housing;
- and
- a pressure transfer medium disposed within the cavity so as to couple the diaphragm to said pressure sensing device;
- wherein the housing defines a shoulder formed around the first opening and the resilient diaphragm is molded directly to the shoulder of the housing.
A pressure transducer for measuring pressure within a measurand environment comprising:
- a header which includes a substantially nondeformable molded housing formed from a first material having a thermoplastic base material defining a cavity and a first opening into the cavity and a resilient diaphragm formed from a second material having the same base material as the first material molded to the housing and spanning the first opening;
- a pressure sensing device secured in place within the housing;
- and
- a pressure transfer medium disposed within the cavity so as to couple the diaphragm to said pressure sensing device;
- wherein the housing defines a moat formed around the first opening and the resilient diaphragm is molded to the housing in said moat.
A pressure transducer for measuring pressure within a measurand environment comprising:
- a header which includes a substantially nondeformable molded housing formed from a first material having a thermoplastic base material defining a cavity and a first opening into the cavity and a resilient diaphragm formed from a second material having the same base material as the first material molded to the housing and spanning the first opening;
- a pressure sensing device secured in place within the housing;
- a pressure transfer medium disposed within the cavity so as to couple the diaphragm to said pressure sensing device;
- and
- a container disposed in the cavity between the resilient diaphragm and the pressure sensing device, wherein the pressure transfer medium is substantially confined to the container:
- wherein the housing defines a reservoir of encapsulating material and the container is coupled to the diaphragm by the encapsulating material in said reservoir.
A pressure transducer for measuring pressure within a measurand environment comprising:
- a header which includes a substantially nondeformable molded housing formed from a first material having a thermoplastic base material defining a cavity and a first opening into the cavity and a resilient diaphragm formed from a second material having the same base material as the first material molded to the housing and spanning the first opening;
- a pressure sensing device secured in place within the housing;
- a pressure transfer medium disposed within the cavity so as to couple the diaphragm to said pressure sensing device;
- and
- a container disposed in the cavity between the resilient diaphragm and the pressure sensing device, wherein the pressure transfer medium is substantially confined to the container;
- wherein the housing defines a reservoir of encapsulating material and the container is coupled to the diaphragm by the encapsulating material in said reservoir, and wherein the housing further defines spill over regions disposed about said reservoir.
A pressure transducer for measuring pressure within a measurand environment comprising:
- a header which includes a substantially nondeformable molded housing formed from a first material having a thermoplastic base material defining a cavity and first and second openings into the cavity and a resilient diaphragm formed from a second material having the same base material as the first material molded to the housing and spanning the first opening;
- and
- a pressure sensing device spanning the second opening;
- a container disposed in the cavity between the resilient diaphragm and the pressure sensing device;
- and
- a pressure transfer medium disposed within the container so as to couple the diaphragm to said pressure sensing device.
Dependencies are inferred from the claim text.