Arrangement for monitoring pneumatic tire inflation pressure
OwnerHansruedi Etter-Felixinventor
Life of this patent
Estimating the term…
Abstract
A cylinder accommodates an elongated bellows tube one end of which is connected to the cylinder and another end of which has a piston sealingly mounted in it so that the piston can move with the bellows tube during expansion and contraction of the latter. The piston in part bounds a pressure chamber in the cylinder outside the bellows tube and is urged to a position in which it closes the chamber. Channels communicate the chamber with one or more tires so that the piston is subject to the inflation pressure of the tire and shifts in the cylinder under concomitant change in the axial length of the bellows tube when changes in the tire inflation pressure occur.
Claims10
An arrangement for monitoring pneumatic tire inflation pressure, comprising a cylinder;
- an elongated bellows tube in said cylinder and having an end connected thereto and another end;
- a piston sealingly mounted in said other end and movable with said bellows tube during expansion and contraction of the same, said piston in part bounding a pressure chamber outside said bellows tube;
- and channel means for communicating said pressure chamber with a tire so that the piston is subject to the inflation pressure in the tire and shifts in said cylinder under concomittant change in the axial length of said bellows tube, in response to changes in the inflation pressure, said channel means including at least two channels each adapted to communicate with a different tire and each having an opening communicating with said pressure chamber, and said piston being movable to and from a position in which it blocks at least one of said openings.
An arrangement for monitoring pneumatic tire inflation pressure, comprising a cylinder;
- an elongated bellows tube in said cylinder and having an end connected thereto and another end;
- a piston sealingly mounted in said other end and movable with said bellows tube during expansion and contraction of the same, said piston in part bounding a pressure chamber outside bellows tube;
- channel means for communicating said pressure chamber with a tire so that the piston is subject to the inflation pressure in the tire and shifts in said cylinder under concomitant change in the axial length of said bellows tube, in response to changes in the inflation pressure;
- a rod extending axially through said tube and having one end portion connected to said piston, and another end portion;
- biasing means biasing said piston toward said position;
- and regulating means for regulating the biasing force of said biasing means, comprising a threaded element surrounding said rod outside said tube and having external threads meshing with threads in said cylinder, said biasing means bearing upon said threaded element.
Dependencies are inferred from the claim text.