Pressure sensor
First Claim
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1. A pressure sensor comprising:
- a body;
a pressure inlet tube housed in said body and having a pressure inlet opening defined therein for introducing oil having an oil pressure, said pressure inlet tube having a proximal end and a distal end opposite to each other;
a pressure sensor unit affixed to a surface of said proximal end of said pressure inlet tube and covering said pressure inlet opening to convert the oil pressure to an electrical signal; and
a decelerating device positioned at a distal end side of said pressure inlet tube and comprising a communication wall and a bushing, said communication wall having a stepped cross-section said decelerating device reducing a flow rate of the oil.
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Abstract
A pressure sensor includes a body, a pressure inlet tube housed in the body and having a pressure inlet opening defined therein for introducing oil pressure, and a pressure sensor unit affixed to a proximal end surface of the pressure inlet tube covering the pressure inlet opening to convert the oil pressure to an electrical signal. An oil flow decelerating structure is disposed to a distal end side of the pressure inlet tube for reducing the flow rate of oil.
73 Citations
20 Claims
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1. A pressure sensor comprising:
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a body; a pressure inlet tube housed in said body and having a pressure inlet opening defined therein for introducing oil having an oil pressure, said pressure inlet tube having a proximal end and a distal end opposite to each other; a pressure sensor unit affixed to a surface of said proximal end of said pressure inlet tube and covering said pressure inlet opening to convert the oil pressure to an electrical signal; and a decelerating device positioned at a distal end side of said pressure inlet tube and comprising a communication wall and a bushing, said communication wall having a stepped cross-section said decelerating device reducing a flow rate of the oil. - View Dependent Claims (2, 3, 18)
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4. A pressure sensor comprising:
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a body; a pressure inlet tube accommodated in said body and having a pressure inlet opening defined therein for introducing an oil pressure of a fluid medium; a pressure sensor unit affixed to a proximal end surface of said pressure inlet tube and covering said pressure inlet opening to convert the oil pressure to an electrical signal; and an elastic transmission gel accommodated in said pressure inlet opening and in contact with the fluid medium at only one end of said pressure inlet opening for transmitting oil pressure to said pressure sensor unit; wherein a pressure inlet path defined in said pressure inlet opening narrows progressively toward said pressure sensor unit, and said pressure sensor unit detects the oil pressure through said transmission gel in said pressure inlet path. - View Dependent Claims (5, 19)
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6. A pressure sensor comprising:
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a case; a sensor unit housed in said case for converting pressure of a fluid mediumn to an electrical signal; a pressure inlet tube housed in said case for introducing the fluid medium; and an instantaneous high pressure buffering device disposed inside said pressure inlet tube and comprising a filter that allows the fluid medium to flow therethrough, said device buffering an instantaneous high pressure applied by the fluid medium to said sensor unit, wherein said pressure inlet path narrows progressively through a stepped cross section towards said pressure unit. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 20)
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Specification