Fluid flow meter

A fluid flow meter, comprising:

• a flexible membrane having a first length;
• a fluid flow chamber including a fluid flow inlet port and a fluid flow exit port and a fluid flow path defined therebetween;
• a first pair of flexible leaf springs;
• inlet clamping means for clamping said pair of leaf springs to lie flat along either side of a first end of said membrane adjacent said fluid flow inlet port in a central plane in said fluid flow chamber;
• and
• exit clamping means for clamping a second end of said membrane in said central plane adjacent said fluid flow exit port at a distance from said first end less than said first length, whereby undulation of said membrane at said first end is resisted by said pair of leaf springs.

A method for enhancing the behavior of a flexible membrane in a fluid flow meter, comprising the steps of:

• mounting a flexible membrane in a fluid flow chamber;
• clamping a first pair of leaf springs to lie against said membrane along either side of a first end of said membrane in a central plane in said fluid flow chamber;
• and
• clamping a second end of said membrane in said central plane, whereby undulation of said membrane at said first end is resisted by said pair of leaf springs.