公开(公告)号：US09840117B2

公开(公告)日：2017-12-12

申请号：US15038464

申请日：2014-11-20

Applicant: PressureRite (Pty) Ltd.

Inventor： Pierre Van Wyk Becker

IPC: B60C23/12 ,  F16D27/06 ,  F04B37/10 ,  F04B35/01 ,  B60C23/00

CPC classification number: B60C23/004 ,  B60C23/007 ,  B60C23/12 ,  F04B35/01 ,  F04B37/10 ,  F16D27/06

Abstract: A device (10) for providing air under pressure to a rotating pneumatic tire is disclosed. The device comprises a pump (48, 50, 58) which in use rotates with the tire and which provides air under pressure to the tire when the pump is activated. There is a pump drive system for activating the pump upon a loss of pressure in the tire. The pump drive system includes a connecting rod (52) which is rotationally connected to the tire and an eccentric body (32) which rotates with the rod when the pump is inactive. The eccentric body is inhibited from rotating with the rod to activate the pump. Relative rotation between the rod and the eccentric body drives the pump to provide air under pressure to the tire. An electromagnetic clutch is provided which has a first plate (26) which is non-rotatable and a second plate (36) which rotates with the body. The first plate is connected to the second plate electromagnetically when the clutch is engaged to prevent rotation of the second plate and hence of the connecting rod.

公开(公告)号：US09994081B2

公开(公告)日：2018-06-12

申请号：US15038462

申请日：2014-11-20

Applicant: PressureRite (Pty) Ltd.

Inventor： Pierre Van Wyk Becker

IPC: B60C23/00 ,  B60C23/12 ,  F04B37/10 ,  F04B35/04

CPC classification number: B60C23/004 ,  B60C23/007 ,  B60C23/12 ,  F04B35/04 ,  F04B37/10

Abstract: A device (10) is disclosed for providing air to a tire which is mounted on a wheel rim which itself is free to rotate about a fixed, that is, non-rotatable axle 22. The device includes a pump (50, 52, 54, 62) which in use rotates with the tire and which is configured to provide, when activated, air under pressure to the tire. There is a pump drive system for activating the pump. The pump drive system comprising a piston rod (56) which is connected to and rotates with the tire and a body (40) which rotates in unison with the rod (56) while the pump is inactive. An electric motor (68) rotates the body (40) with respect to the rod (56) to activate the pump and provide air to the tire. Rotation of the body (40) is superimposed on rotation of the pump with the tire. The device also includes a stator component (26) and coils (30) and magnets (32) for generating, by electrical induction, power for driving the motor using the relative rotation between the second part and the stator component (26).