PRESSURE INDICATING DEVICE FOR A TIRE

• US 20030079538A1
• Filed: 10/29/2001
• Published: 05/01/2003
• Est. Priority Date: 10/29/2001
• Status: Active Grant

• Current Assignee: L&F Plastics, Co., Ltd.
• Original Assignee: L&F Plastics, Co., Ltd.
• Inventors: Hsu, Mu-Chuan
• Granted Patent: US 6,606,903 B2
• Time in Patent Office: Days
• US Class Current: 73/146.8
• CPC Class Codes: B60C 23/0496 Valve stem attachments positioned outside of the tyre chamber

Abstract

An apparatus mounted on a valve for indicating a tire pressure comprising a pressure indicator including a downward pipe having an inner thread, a hollow downward cylinder projected into pipe, cylinder having a bottom opening, a mainspring having one end coupled to cylinder, mainspring being capable of pivoting as air through opening, and a pointer coupled to the other end of mainspring. In a mounted state of pressure indicator and valve, inner thread of downward pipe is secured to valve and cylinder is urged against valve to form an air path from tire to mainspring through valve and opening for pivoting pointer

Claims

1. An apparatus mounted on a valve of a tire for indicating a pressure thereof the apparatus comprising a pressure indicator including a downward pipe having an inner thread, a hollow downward cylinder projected into the pipe, the cylinder having a bottom opening, a mainspring having one end coupled to the cylinder, the mainspring being capable of pivoting as air through the opening, a pointer coupled to the other end of the mainspring, and a scale wherein in a mounted state of the pressure indicator and the valve, the inner thread of the downward pipe is secured to the valve and the cylinder is urged against the valve to form an air path from the tire to the mainspring through the valve and the opening for pivoting the pointer

2. An apparatus mounted on a valve of a tire for indicating a pressure thereof the apparatus comprising a pressure indicator including a cap having an inner thread secured to the valve, a hollow downward cylinder projected into the cap the cylinder having a bottom opening, a spring put on the cylinder, a mainspring having one end coupled to the cylinder, the mainspring being capable of pivoting as air through the opening, a pointer coupled to the other end of the mainspring, and a scale wherein in a mounted state of the pressure indicator and the valve, the valve is closed, and in a pressed state of the pressure indicator, the spring is compressed to urge the valve by the cylinder to form an air path from the tire to the mainspring through the valve and the opening for pivoting the pointer