AIR MAINTENANCE PUMP ASSEMBLY

摘要

A pumping assembly keeps a pneumatic tire from becoming underinflated. The pumping assembly includes at least one pump attached to the tire rim, a cam fixed to the gravity mass for maintaining the cam in a fixed position relative to the gravity mass, and rollers for engaging the cam and producing the pumping action as the tire rim rotates and the gravity mass retards rotation of the cam.

主权项

1. A pumping assembly for use with a pneumatic tire mounted on a tire rim to keep the pneumatic tire from becoming underinflated, the pumping assembly comprising:
a mounting plate for securing to the tire rim; a pump having two chambers, said pump being attached to the mounting plate, wherein the outlet of the first chamber is connected to the inlet of the second chamber; a cam for producing a pumping action, said cam being rotatably mounted to the mounting plate; a gravity mass fixed to the cam for maintaining the cam in a vertical position; said pump having a roller for engaging the cam and producing the pumping action as the tire rim rotates.