IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
|
출원번호 |
US-0901410
(2001-07-09)
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발명자
/ 주소 |
- Rothrum, Robert J.
- Vokaty, Joel A.
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출원인 / 주소 |
- 3M Innovative Properties Company
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
75 인용 특허 :
3 |
초록
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An assembly for making accurate mixtures of liquid components and feeding that liquid mixture to the inlet port of a sprayer. The assembly includes (1) a container of stiff visually transparent polymeric material comprising a side wall with a frusto conical inner surface, and a bottom wall at the bo
An assembly for making accurate mixtures of liquid components and feeding that liquid mixture to the inlet port of a sprayer. The assembly includes (1) a container of stiff visually transparent polymeric material comprising a side wall with a frusto conical inner surface, and a bottom wall at the bottom end of the side wall opposite a top end of the side wall that defines an opening into a cavity in the container. A flexible liner positioned within the cavity in the container has an outer surface corresponding in shape to the inner surface of the container, an inner surface defining a cavity in the liner, and an annular lip along the top end of the side wall defining an opening into the cavity in the liner. An indicating sheet of resiliently flexible polymeric material is positioned between the side wall of the container and the flexible liner, conforms in shape to the inner surface of the container, and bears indicia visible through the side wall of the container that indicates the levels to which a plurality of different component liquids can be sequentially poured into the cavity in the flexible liner to achieve a predetermined ratio between the liquids.
대표청구항
▼
An assembly for making accurate mixtures of liquid components and feeding that liquid mixture to the inlet port of a sprayer. The assembly includes (1) a container of stiff visually transparent polymeric material comprising a side wall with a frusto conical inner surface, and a bottom wall at the bo
An assembly for making accurate mixtures of liquid components and feeding that liquid mixture to the inlet port of a sprayer. The assembly includes (1) a container of stiff visually transparent polymeric material comprising a side wall with a frusto conical inner surface, and a bottom wall at the bottom end of the side wall opposite a top end of the side wall that defines an opening into a cavity in the container. A flexible liner positioned within the cavity in the container has an outer surface corresponding in shape to the inner surface of the container, an inner surface defining a cavity in the liner, and an annular lip along the top end of the side wall defining an opening into the cavity in the liner. An indicating sheet of resiliently flexible polymeric material is positioned between the side wall of the container and the flexible liner, conforms in shape to the inner surface of the container, and bears indicia visible through the side wall of the container that indicates the levels to which a plurality of different component liquids can be sequentially poured into the cavity in the flexible liner to achieve a predetermined ratio between the liquids. . 4. A device according to claim 1, comprising i detection assemblies each comprising two piezoelectric cells disposed respectively in the reservoirs of a multi-reservoir tank. 5. A device according to claim 1, comprising a second assembly (S2) comprising a piezoelectric cell adapted to serve as a reference cell and a piezoelectric cell adapted to serve as a level measurement cell, S1 and S2 being disposed respectively in a reservoir of a two-reservoir tank. 6. Device according to one of claims 1 to 5, characterized in that each detection assembly (S1, S2) comprises a central measurement piezoelectric cell (10) surrounded by an annular reference piezoelectric cell (12). 7. Device according to claim 1, characterized in that it comprises control means able to implement, after an initialization (1101), a procedure comprising: a) at least one step (1100, 1100bis) for initializing at least one sensor (i) in the course of which the system acquires parameters, with a high ratio of the rate of excitation of the reference cells (12) to the rate of excitation of the measurement cells (10), b) a step (1200) of iteratively repeating the aforesaid step a) for a determined time, then c) a stabilized measurement step (1300). 8. Device according to claim 7, characterized in that step a) consists in acquiring the parameters successively for i detection assemblies (Si). 9. Device according to claim 7, characterized in that during step a), the supervisory means proceed successively for each of the detection assemblies (i) to alternating steps (C, D) of excitation of the reference piezoelectric cell (12) and of the measurement piezoelectric cell (10). 10. Device according to claim 7, characterized in that during step c) of stabilized measurement (1300), the supervisory means define a succession of excitations (A) of the measurement cells (10), alternately for the (I) sensors, between two steps (B) of excitation of the corresponding reference cells. 11. A device according to claim 7, wherein step a) comprises acquiring the parameters successively for i detection assemblies (Si). 12. A device according to claim 1, wherein each measurement is made by averaging a determined number (Nay) of acquired valid measurement times. 13. A device according to claim 12, wherein each measurement is made by averaging four successive valid measurement times. 14. Device according to claim 1, characterized in that it furthermore comprises means able to define at least sequentially a diagnostic subroutine (1900) during which the piezoelectric cells (10, 12) are isolated from the outputs of the control means and the diagnostic means are sensitive to the signals present on the outputs of these control means. 15. Device according to claim 14, characterized in that the diagnostic subroutine (1900) comprises an excitation signal emission phase (1903) lasting a duration less than that of a temporal mask and the detection (1906) of the absence of a signal at the output of the control means for a maximum measurement duration. 16. Device according to claim 14, characterized in that the diagnostic subroutine (1900) of emission an excitation signal lasting a duration greater than that of a temporal mask and the detection (1911) of a signal at the output of the control means upon the expiry of this temporal mask. 17. A device according to claim 1, wherein the device is for measuring the fuel level in a motor vehicle tank. 18. A device for measuring liquid level, comprising at least one detection assembly (Si) comprising at least a piezoelectric cell adapted to serve as a reference cell and a piezoelectric cell adapted to serve as a level measurement cell, the cells being associated with a controller for emitting ultrasound waves respectively opposite a reference reflector, situated a known distance (D) from the associated cell on the one hand, and from the upper surface of the liquid on the other hand, and a processor adapted to determine the level of liquid by utilizing t he respective times of propagation of the ultrasound waves emitted by each of these two cells, further comprising an algorithm to define, after the device is switched on, an initialization phase during which the controller operates the piezoelectric cells in such a way that the ratio of the rate of excitation of the reference cell to that of the level measurement cell is greater than the ratio of the rate of excitation of the reference cell to that of the level measurement cell during a stabilized subsequent measurement phase.
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