US 12,257,865 B2
Valve stem and tire valve
Masahiko Yamamoto, Fuwa-gun (JP); Katsuji Ono, Motosu (JP); and Michinari Hirose, Ibi-gun (JP)
Assigned to PACIFIC INDUSTRIAL CO., LTD., Ogaki (JP)
Appl. No. 17/774,244
Filed by PACIFIC INDUSTRIAL CO., LTD., Ogaki (JP)
PCT Filed Feb. 28, 2020, PCT No. PCT/JP2020/008401
§ 371(c)(1), (2) Date May 4, 2022,
PCT Pub. No. WO2021/171577, PCT Pub. Date Sep. 2, 2021.
Prior Publication US 2022/0410644 A1, Dec. 29, 2022
Int. Cl. B60C 29/00 (2006.01); B60C 23/04 (2006.01); B60C 29/02 (2006.01)
CPC B60C 29/005 (2013.01) [B60C 23/0494 (2013.01); B60C 23/0496 (2013.01); B60C 29/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A valve stem to be mounted to a valve mounting hole of a tire wheel, the valve stem comprising:
a stem body that is pipe-shaped, contains a valve core inside, and has a proximal end to which an electrical circuit unit is fixed;
a cover member made of elastomer and covering an outer side of the stem body;
an engagement groove formed on an outer circumferential surface of a proximal end of the cover member to engage with an opening edge of the valve mounting hole;
a tubular weight adjustment member having a higher specific gravity than the cover member and made of a material different from that of the stem body, the weight adjustment member being embedded in the cover member and positioned closer to a distal end of the cover member than the engagement groove to surround the stem body; and
a tubular region formed between the weight adjustment member and an outer circumferential surface of the stem body, and filled with the elastomer forming the cover member.