Manometer having dual pressure sensors
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0915165
(2001-07-24)
|
발명자
/ 주소 |
- Condrea, Octavian G.
- Clark, Stephen S.
|
출원인 / 주소 |
|
대리인 / 주소 |
Lee, Mann, Smith, McWilliams, Sweeney & Ohlson
|
인용정보 |
피인용 횟수 :
6 인용 특허 :
9 |
초록
▼
A manometer for measuring fluid pressure having a first pressure sensor and a second pressure sensor that is inverted with respect to the first pressure sensor. The first pressure sensor generates a first electrical output signal corresponding to a fluid pressure measured by a first diaphragm of the
A manometer for measuring fluid pressure having a first pressure sensor and a second pressure sensor that is inverted with respect to the first pressure sensor. The first pressure sensor generates a first electrical output signal corresponding to a fluid pressure measured by a first diaphragm of the first pressure sensor. The second pressure sensor generates a second electrical output signal corresponding to a fluid pressure measured by a second diaphragm of the second pressure sensor. The first and second electrical output signals are combined into a combined electrical output signal. False readings of a change in/pressure measured by the first pressure sensor and measured by the second pressure sensor in each of the first and second electrical output signals, due to movement of the manometer, are cancelled by one another in the combined electrical output signal to provide an accurate pressure measurement regardless of movement of the manometer.
대표청구항
▼
A manometer for measuring fluid pressure having a first pressure sensor and a second pressure sensor that is inverted with respect to the first pressure sensor. The first pressure sensor generates a first electrical output signal corresponding to a fluid pressure measured by a first diaphragm of the
A manometer for measuring fluid pressure having a first pressure sensor and a second pressure sensor that is inverted with respect to the first pressure sensor. The first pressure sensor generates a first electrical output signal corresponding to a fluid pressure measured by a first diaphragm of the first pressure sensor. The second pressure sensor generates a second electrical output signal corresponding to a fluid pressure measured by a second diaphragm of the second pressure sensor. The first and second electrical output signals are combined into a combined electrical output signal. False readings of a change in/pressure measured by the first pressure sensor and measured by the second pressure sensor in each of the first and second electrical output signals, due to movement of the manometer, are cancelled by one another in the combined electrical output signal to provide an accurate pressure measurement regardless of movement of the manometer. ferent from the material of the rotor for reducing vibration. 3. The structure of a driving unit as claimed in claim 2, wherein the connector includes: a central portion; a cylindrical hub projected from the central portion for connection with the shaft; a cylindrical outer rib spaced from an outer circumference of the hub to provide a space for attenuating transmission of vibration between the rotor and the shaft; and reinforcing ribs between the hub and the outer rib to connect the hub and the outer rib across the space. 4. The structure of a driving unit as claimed in claim 3, wherein the connector further includes: a serration on an inside of the cylindrical hub for coupling to the shaft; and positioning projections provided on one side of the connector for positioning the connector with respect to the rotor before the connector is fastened to the rotor with bolts. 5. The structure of a driving unit as claimed in claim 1, wherein the rotor includes: cooling fins each formed by cutting the rear wall in a `.OR right.` form, and folding in a stator direction for cooling a heat generated at the stator; and openings each formed by the cutting of the rear wall and acting as vent holes for flow of air. 6. The structure of a driving unit as claimed in claim 5, wherein the rotor further includes: an embossing between adjacent cooling fins on the rear wall of the rotor for reinforcement of the rotor. 7. The structure of a driving unit as claimed in claim 6, wherein the embossing provided for reinforcement of the rotor includes a drain hole for draining water. 8. The structure of a driving unit as claimed in claim 1, wherein the cup formed rotor includes a reinforced rim for maintaining a true circle when the rotor is rotated at a high speed. 9. A drum type washing machine, comprising: a tub for storing washing water; a drum of a metal rotatably mounted inside of the tub and disposed one of horizontal to the ground or with an angle to the ground, for accommodating laundry therein; a shaft connected, through the tub, to the drum mounted inside of the tub, for transmission of a driving force of a motor to the drum; bearings, each fitted onto an outer circumference of the shaft for supporting the shaft; a bearing housing having a central portion and stator fastening bosses disposed at fixed intervals along a circumference of the central portion, for supporting the bearings; a stator having a plurality of magnetic cores formed by stacking magnetic laminations, each having a salient pole projected outward in a radial direction with respect to a central longitudinal axis of the stator, a plurality of coils, each wound around a respective one of the salient poles, and a frame of insulting material for covering top and bottom surfaces of a magnetic core assembly of the magnetic cores; and a cup-formed rotor having a rotor body of magnetic material and permanent magnets, the rotor body comprising a side wall and a rear wall to cover an outer circumference and a bottom of the stator, the permanent magnets fitted to the side wall, wherein the rotor includes cooling fins each formed by cutting the rear wall in a `.OR right.` form, and folding in a stator direction for cooling the stator. 10. The drum type washing machine as claimed in claim 9, wherein the rotor further includes: openings each formed by the cutting of the rear wall and acting as vent holes for flow of air. 11. A drum type washing machine, comprising: a tub for storing washing water; a drum of a metal rotatably mounted inside of the tub and disposed one of horizontal to the ground or with an angle to the ground, for accommodating laundry therein; a shaft connected, through the tub, to the drum mounted inside of the tub, for transmission of a driving force of a motor to the drum; bearings, each fitted onto an outer circumference of the shaft for supporting the shaft; a bearing housing having a central portion and stator fastening boss
이 특허에 인용된 특허 (9)
-
Nelson Richard W. (Freeport IL), Amplified pressure transducer.
-
Nudd ; Jr. Howard W. (Foxboro MA) Demoura David N. (Taunton MA), Differential-pressure measuring apparatus with improved arrangement for coupling pressures to a semiconductor sensor.
-
Brown Clem H. (Scottsdale AZ) Wallace Daniel J. (Phoenix AZ), Dual absolute pressure sensor and method thereof.
-
Cuomo Frank W. (East Providence RI), Optical fiber pressure sensor for liquid level monitoring.
-
Scherer Otto (Obererlinsbach CHX), Pressure sensing device.
-
Sorrells David F. (Jacksonville FL), Pressure sensor.
-
Schliebe Paul M. ; Darnell Charles ; Hornback Edward R. ; Lowman Clark E., Structure for mounting a cluster of pressure sensors upon an electro-hydraulic brake system control unit.
-
Sittler Fred C., Transmitter with isolation assembly for pressure sensor.
-
Archibald G. Kent (Vadnais Heights MN) Curran Timothy G. (Ramsey MN) Danielson Orland H. (Roseville MN) Poliac Marius O. (St. Paul MN) Thede Roger C. (Afton MN), Wrist mounted blood pressure sensor.
이 특허를 인용한 특허 (6)
-
Corder, Rodney; Heuer, Daniel A., Electronic tilt compensation for diaphragm based pressure sensors.
-
Voege,James A.; Ferrer,David A.; Thie,Matthew G., Lighted fluid flow indication apparatus.
-
Palmer,Brian L.; Heuer,Daniel A.; Krueger,Ronald R., Pressure gage and switch.
-
Aziz,Mohamed Fazni, Pressure gauge and medical apparatus with same.
-
Jönsson, Lennart; Jansson, Olof; Nilsson, Eddie, Pressure sensing device and use of the same in a connecting structure.
-
Kraatz, Alexander, Pressure sensor assembly for measuring absolute pressure.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.