Tire pressure drop alarming apparatus
First Claim
1. A tire pressure drop alarming apparatus for alarming an abnormal pressure drop of a tire by transforming said pressure drop into an electric signal, comprising a detection switch for detecting pressure drop of pressurized air in a tire;
- an air pipe connecting said detecting switch and a valve stem of said tire for allowing said pressurized air into said detection switch;
a resonance coil resonating to electric waves radiated from an oscillation coil positioned opposite thereto when said detection switch detects a predetermined pressure drop of said pressurized air;
said tire pressure drop alarming apparatus being positioned axially outwardly from a rim flange of a wheel rim which has a vertical portion substantially vertical to a rotational axis of said tire and a parallel portion connected at the radially outward end of said vertical portion in substantially parallel relation to the rotational axis of said tire and is adapted to retain said detection switch, said air pipe, and said resonance coil, the apparatus further including a resonance condenser and a retaining body made of metal including a base plate portion interposed between and separating said resonance coil from said vertical portion of said rim flange in such a way that said vertical portion of said rim flange is prevented from imparting characteristics to said resonance coil, and a side plate portion integrally connected with said base plate portion interposed between and separating said resonance coil from said parallel portion of said rim flange in such a way that said parallel portion of said rim flange is prevented from imparting characteristics to said resonance coil, said retaining body being attached to said rim flange with said base plate portion and said side plate portion remaining undeformed.
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Accused Products
Abstract
This invention is concerned with a tire pressure drop alarming apparatus for signaling an abnormal pressure drop of a pneumatic tire by transforming the pressure drop into an electric signal.
The apparatus comprises a resonating circuit including a resonance coil and a resonance condenser and includes a retaining body made of metal. The retaining body includes a bottom plate portion interposed between and separating the resonance coil from a vertical portion of a rim flange in such a way that the vertical portion of the rim flange can prevent effects imparting characteristics of the resonance coil, and a side plate portion integrally connected with the base plate portion to be interposed connected with the base plate portion to be interposed between and separating the resonance coil from the parallel portion of the rim flange in such a way that a parallel portion of the rim flange can prevent effects imparting characteristics of the resonance coil, the retaining body being attached to the rim flange with the base plate portion and the side plate portion not deformed.
18 Citations
6 Claims
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1. A tire pressure drop alarming apparatus for alarming an abnormal pressure drop of a tire by transforming said pressure drop into an electric signal, comprising a detection switch for detecting pressure drop of pressurized air in a tire;
- an air pipe connecting said detecting switch and a valve stem of said tire for allowing said pressurized air into said detection switch;
a resonance coil resonating to electric waves radiated from an oscillation coil positioned opposite thereto when said detection switch detects a predetermined pressure drop of said pressurized air;
said tire pressure drop alarming apparatus being positioned axially outwardly from a rim flange of a wheel rim which has a vertical portion substantially vertical to a rotational axis of said tire and a parallel portion connected at the radially outward end of said vertical portion in substantially parallel relation to the rotational axis of said tire and is adapted to retain said detection switch, said air pipe, and said resonance coil, the apparatus further including a resonance condenser and a retaining body made of metal including a base plate portion interposed between and separating said resonance coil from said vertical portion of said rim flange in such a way that said vertical portion of said rim flange is prevented from imparting characteristics to said resonance coil, and a side plate portion integrally connected with said base plate portion interposed between and separating said resonance coil from said parallel portion of said rim flange in such a way that said parallel portion of said rim flange is prevented from imparting characteristics to said resonance coil, said retaining body being attached to said rim flange with said base plate portion and said side plate portion remaining undeformed. - View Dependent Claims (2, 3, 4, 5, 6)
- an air pipe connecting said detecting switch and a valve stem of said tire for allowing said pressurized air into said detection switch;
Specification