Pressure gauge having an energy-saving switch assembly for a pressure responsive signal-generating device
First Claim
1. A pressure gauge for a pneumatic tire, comprising:
- a casing adapted to be attached to the pneumatic tire;
a pressure responsive signal-generating device disposed in said casing;
an electric power source connected electrically to said signal-generating device; and
a switch assembly connected electrically to said electric power source, said switch assembly including;
a normally open reed switch electrically connected to said electric power source;
a magnet member disposed movably in said casing to produce a magnetic field for activating said reed switch to an ON position and movable toward said reed switch via a centrifugal force produced upon rotation of the pneumatic tire; and
a magnet support disposed adjacent to said reed switch to movably hold said magnet member and having a biasing unit to provide a biasing action to thereby move said magnet member away from said reed switch when the centrifugal force is absent.
1 Assignment
0 Petitions
Accused Products
Abstract
A pressure gauge for a pneumatic tire includes a casing, a pressure responsive signal-generating device disposed in the casing, an electric power source connected electrically to the signal-generating device, and a switch assembly connected electrically to the electric power source. The switch assembly includes a normally open reed switch, a magnet member and a magnet support. The reed switch is electrically connected to the electric power source. The magnet member is disposed movably in the casing to produce a magnetic field for activating the reed switch to an ON position, and is movable toward the reed switch via a centrifugal force produced upon rotation of the pneumatic tire. The magnet support is disposed adjacent to the reed switch to movably hold the magnet member, and has a biasing unit to provide a biasing action to move the magnet member away from the reed switch when the centrifugal force is absent.
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Citations
6 Claims
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1. A pressure gauge for a pneumatic tire, comprising:
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a casing adapted to be attached to the pneumatic tire; a pressure responsive signal-generating device disposed in said casing; an electric power source connected electrically to said signal-generating device; and a switch assembly connected electrically to said electric power source, said switch assembly including; a normally open reed switch electrically connected to said electric power source; a magnet member disposed movably in said casing to produce a magnetic field for activating said reed switch to an ON position and movable toward said reed switch via a centrifugal force produced upon rotation of the pneumatic tire; and a magnet support disposed adjacent to said reed switch to movably hold said magnet member and having a biasing unit to provide a biasing action to thereby move said magnet member away from said reed switch when the centrifugal force is absent. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification