Fluid meter with pressure protection
View Patent ↗A fluid meter is described having certain elastically displaceable wall portions arranged to be elastically displaced in response to a pressure variation propagating into the measurement volume.
1. A flow meter, comprising:
housing walls defining a measurement volume and having an elastically displaceable wall portion in the housing walls, the elastically displaceable wall portion arranged to be elastically displaced in response to a pressure variation propagating into the measurement volume.
2. A flow meter according to claim 1 , wherein the wall portion is elastically displaceable by elastic deformation.
3. A flow meter according to claim 1 , wherein the flow meter further comprises a measuring device arranged in the measurement volume, and the measuring device comprises a piston-type flow meter.
4. A flow meter according to claim 1 , wherein the measurement volume comprises at least one sub-volume with a cylindrical section.
5. A flow meter according to claim 4 , wherein the elastically displaceable wall portion defines an end surface of the cylindrical section.
6. A flow meter according to claim 4 , wherein the sub-volume further comprises a non-cylindrical section, and wherein the elastically displaceable wall portion for a part of the housing walls defines the non-cylindrical section.
7. A flow meter according to claim 1 , wherein the elastically displaceable wall portion is arranged to be elastically displaced only when subjected to a pressure transient with a pressure variation of more than 1 bar.
8. A flow meter according to claim 1 , wherein the elastically displaceable wall portion is removable from the housing.
9. A flow meter according to claim 1 , wherein the elastically displaceable wall portion is supported by a frame member.
10. A flow meter according to claim 1 , wherein the housing walls comprise two spaced apart wall sections interconnected with the elastically displaceable wall portion.
11. A dispenser, comprising:
a flow meter with housing walls defining a measurement volume, wherein the housing walls comprise an elastically displaceable wall portion arranged to be elastically displaced in response to a pressure variation propagating into the measurement volume.
12. A dispenser according to claim 11 , wherein the elastically displaceable wall portion is elastically displaceable by elastic deformation.
13. A dispenser according to claim 11 , further comprising a measuring device arranged in the measurement volume, wherein the measuring device is a piston-type flow meter.
14. A fluid meter, comprising:
housing walls defining a measurement volume, wherein the measurement volume comprises at least one sub-volume with a cylindrical section, and wherein the sub-volume further comprises a non-cylindrical section, an inlet to connect the measurement volume to a fluid reservoir, and an outlet to connect the measurement volume to a fluid dispensing line, wherein the housing walls comprise an elastically displaceable wall portion arranged to be elastically displaced in response to a pressure variation propagating into the measurement volume through the inlet or the outlet, and wherein the elastically displaceable wall portion for a part of the housing walls defines the non-cylindrical section.
15. A flow meter according to claim 1 , further comprising an inlet to connect the measurement volume to a fluid reservoir, and an outlet to connect the measurement volume to a fluid dispensing line.
16. A flow meter according to claim 1 , wherein the wall portion is elastically displaceable by a rigid wall portion comprising a resilient member, wherein the resilient member is arranged to absorb pressure variations.
17. A flow meter according to claim 4 , wherein the flow meter comprises three sub-volumes, and each sub-volume comprises an elastically displaceable wall portion.