Adding flowmeter
OwnerJacques Arvisenetinventor
Life of this patent
Estimating the term…
Abstract
An adding flowmeter comprises a liquid chamber and is divided into two chamber parts by a membrane fixed to a slide which is able to move along a rod. The rod controls a slide valve for the supply and discharge of liquid to and from each of the chamber parts. By means of two abutments against which the slide bears on the rod, the membrane is able to move this rod in order to reverse the supply and discharge connections of the flowmeter so that the membrane carries out a reciprocating movement, filling one of the half-chambers and emptying the other, then vice versa. The number of changes of state of the slide valve are counted to determine the volume of liquid which has circulated in the flowmeter.
Claims5
An adding flowmeter adapted for arrangement in series in a liquid flowpath between a liquid supply pipe and a liquid outlet pipe and comprising:
- a liquid chamber enclosed in a casing having an inlet duct and an outlet duct which both open into a cylindrical bore provided in a portion of the casing, said liquid chamber being divided, in a liquid-tight manner, into first and second compartments by a movable dividing wall;
- a single slide-valve comprising an actuating rod arranged for slidable movement into the said bore between a first and second stable positions, said rod having internal ducts for connecting the inlet duct and the outlet duct respectively to the first compartment and the second compartment when the rod is in the first stable position, and respectively to the second and the first compartment when the rod is in its second stable position;
- a resilient mechanical connection between said dividing wall and said rod;
- first magnetic means at one end of the rod, cooperating with second magnetic means carried by the casing, arranged so as to establish a physical contact between said first and second magnetic means when the rod is in either one or the other of the two said stable positions, in order to create a threshold force to be overcome for enabling a movement of said actuating rod;
- counting means responding to the displacement of the dividing wall for counting back and forth movements of said wall.
Dependencies are inferred from the claim text.