US 11,794,531 B2
Transmitter with hollow box for wheel assemblies
Yasuhisa Tsujita, Motosu (JP)
Assigned to PACIFIC INDUSTRIAL CO., LTD., Ogaki (JP)
Appl. No. 16/306,642
Filed by PACIFIC INDUSTRIAL CO., LTD., Ogaki (JP)
PCT Filed Oct. 26, 2017, PCT No. PCT/JP2017/038777
§ 371(c)(1), (2) Date Apr. 30, 2021,
PCT Pub. No. WO2019/082353, PCT Pub. Date May 2, 2019.
Prior Publication US 2021/0268848 A1, Sep. 2, 2021
Int. Cl. B60C 23/04 (2006.01); G01L 19/00 (2006.01); G01L 17/00 (2006.01); G01L 13/02 (2006.01); G01L 15/00 (2006.01)
CPC B60C 23/0408 (2013.01) [G01L 13/02 (2013.01); G01L 15/00 (2013.01); G01L 17/00 (2013.01); G01L 19/0092 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A transmitter adapted to be arranged in a tire to cause a tire pressure warning device to issue a warning, the transmitter comprising:
a transmitting section, which has a terminal; and
a pressure switch, wherein
the pressure switch includes a hollow box and a passage that causes an interior of the box and an interior of the tire to communicate with each other,
the box includes a conductive deforming portion, which is configured to be separate from the terminal of the transmitting section when a difference between a pressure in the box and a pressure in the tire is less than a predetermined value and to be elastically deformed to contact the terminal when the pressure in the box is higher than the pressure in the tire at least by the predetermined value,
the transmitting section is configured to transmit a warning signal that causes the tire pressure warning device to issue a warning in response to contact between the deforming portion and the terminal, and
a cross-sectional flow area of the passage is configured to, in a state in which the pressure in the tire is lower than the pressure in the box, be changed between when the deforming position and the terminal are in contact with each other and when the deforming position and the terminal are separate from each other.