WO2007131512A1 - A vacuum toilet system and a method for controlling functions thereof - Google Patents
A vacuum toilet system and a method for controlling functions thereof Download PDFInfo
- Publication number
- WO2007131512A1 WO2007131512A1 PCT/DK2007/050053 DK2007050053W WO2007131512A1 WO 2007131512 A1 WO2007131512 A1 WO 2007131512A1 DK 2007050053 W DK2007050053 W DK 2007050053W WO 2007131512 A1 WO2007131512 A1 WO 2007131512A1
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- WIPO (PCT)
- Prior art keywords
- controller
- intermediate tank
- physical parameter
- converter
- toilet
- Prior art date
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
- E03F1/006—Pneumatic sewage disposal systems; accessories specially adapted therefore
Definitions
- the present invention relates to a vacuum toilet system especially for placing in constructions or moving vehicles controlled by a sensor sensing a value of a physical parameter in a monitored part of the system and transmitting a signal to a controller adapted to control the operation of the toilet system and its components in response to adjustable thresholds of the sensed physical parameter.
- the invention also relates to a method of controlling a vacuum toilet system.
- the sensing of physical parameters in or around existing vacuum toilet systems for determining/controlling the functionality thereof is typically provided by electromechanical switches such as e.g. pressure switches sending a signal to a central control.
- Such electromechanical switches are often exposed to accelerated wear and tear such as increased corrosion risks if the switch is placed in an aggressive environment, which is often the case in the field of vacuum toilets. If damaged, e.g. by corrosion, the switch will not function correctly, if at all. Furthermore, experience with the use of such known switches shows that their tolerance and hysteresis characteristics are too unstable for use in vacuum toilet systems and potentially cause erroneous detections in the system. These potential failures of the known switches may eventually lead to malfunction of the vacuum toilet system as a whole.
- It is an object of the present invention to provide a vacuum toilet system comprising a controller adapted to control the operation of the toilet system and its components in response to adjustable thresholds of a sensed physical parameter.
- a vacuum toilet system comprising a toilet bowl, an intermediate tank with a controllable inlet valve between the toilet bowl and the intermediate tank for receiving waste material from the toilet bowl through the inlet valve, and a controllable outlet valve for discharging waste material from the intermediate tank, and a controller for controlling the operation of the toilet system and its components, where transportation of waste material through the inlet and outlet valves is effected by controlling the pressure in the intermediate tank, wherein at least one sensor is connected to the intermediate tank to sense a physical parameter in the intermediate tank and transmit a signal representing the sensed physical parameter to the controller, and the controller is adapted to control the operation of the toilet system and its components in response to adjustable thresholds of the sensed physical parameter.
- the invention is particularly, but not exclusively, advantageous for obtaining a vacuum toilet system in which the operation of the system and its components is controlled on the basis of adjustable threshold value(s) of a selectable physical parameter sensed by the sensor.
- the signal may primarily reflect a current physical condition in or around the intermediate tank.
- the physical parameter may preferably be chosen among the pressure, the temperature, the flow, a possible choking and/or the cut-off in the intermediate tank.
- Other parameters may of course be readily chosen and the system may comprise more than one sensor for sensing several different parameters used as a basis for controlling the system and its components.
- the senor is an analogue pressure transmitter or pressure transducer comprising means for transmitting a signal to the controller.
- the pressure transmitter may preferably be adapted to transmit an analogue signal representing the sensed physical parameter to the controller or reflecting the sensed value or threshold value of the parameter in the intermediate tank.
- the use of an analogue sensor such as a pressure transmitter is particularly, but not exclusively, advantageous for obtaining a more reliable detection of the parameter in the intermediate tank than with traditional electromechanical switches.
- the use of an analogue sensor such as a pressure transmitter will result in less incorrect readings or failures in the system, thus making the operation of the toilet system more stable and facilitating longer service intervals.
- the system further comprises an A/D-converter for converting the analogue signal from the sensor into a digital signal.
- the converter may generate a digital signal that will cause the controller to operate the system or a particular component of the system in a manner so as to remedy the required action indicated such as, but not limited to, a flushing cycle of the toilet system.
- the use of a pressure transmitter as a sensor and the conversion of the analogue signal received there from into a digital signal will not only offer a more reliable system, but also increase the number of different signals being sent to the controller. Each of the different signals may indicate an instruction to the controller to carry out a specific operation.
- the use of a pressure transmitter and an A/D-converter thus makes the controlling of the system more flexible.
- the A/D-converter may be an individual unit placed between the sensor and the controller or it may be integrated with the controller. This is particularly, but not exclusively, advantageous for providing a high degree of flexibility in the system as it may be custom-fit to fulfil the requirements of existing conditions or in new constructions.
- the A/D-converter comprises a programmable microprocessor. This is particularly, but not exclusively, advantageous for facilitating an easy programming or re-programming of the choice of physical parameter and/or the parameter threshold value. This may preferably, but not exclusively, be done by using a computer to access the micro-processor of the A/D-converter either locally on site or remotely via a network connection. If performed locally, the A/D- converter may also comprise applicable interface means such as, but not limited to, a standard USB-connection. The A/D-converter may of course also comprise an already pre-programmed micro-processor for controlling the conversion of the signal.
- system further comprises means for collecting and sending system status information to the controller through a network.
- means may comprise a pre-programmed micro-processor, a storage medium and a transmitter.
- the network may be a wired network or a wireless network. Particularly, but not exclusively, the network may be the GSM network.
- the information may comprise a message on the need for a service check, usage frequency or other relevant information.
- the network may also be used for transmittal of the digital signal from the A/D- converter to the controller.
- This second aspect is particularly, but not exclusively, advantageous in that the method according to the present invention may be implemented by using the sensed physical parameter in an intermediate tank of the system to control the system and its components in response to adjustable threshold values of the sensed physical parameter.
- the method further comprises conversion of the signal by an A/D-converter.
- an A/D-converter In comparison to the use of traditional electromechanical switches, as mentioned above in connection with the first aspect of the invention, this provides a higher degree of freedom for controlling the system as the conversion into a digital signal means that more possible instruction combinations may be sent to the controller.
- a micro-processor of the A/D- converter is programmed through a network.
- a micro-processor in connection with the converter may preferably be programmed so as to process the analogue signal coming from the sensor into a specific digital signal corresponding to the sensed physical parameter.
- the micro-processor may preferably be programmed to submit different digital signals depending on the value of the analogue signal within the limits of adjustable thresholds.
- the type of physical parameter and the threshold value(s) may be programmed or adjusted through a network connection. This may be particularly, but not exclusively, advantageous for facilitating programming of the micro-processor from a central control centre or similar.
- the network connection may be wireless.
- the micro-processor may also be programmable by means of an external personal computer interfaced locally with the converter. This is advantageous for obtaining a swift and easy access on site in order to possibly programme or adjust the parameter or the values thereof.
- the transmittal of the signal to the controller is done through a network.
- the method according to the invention further comprises collecting and sending system status information to the controller through a network.
- the network may be an existing wireless network such as the GSM-network.
- inventions may be particularly, but not exclusively, advantageous under conditions wherein only limited and/or hardly accessible space is available for placing the vacuum toilet system, such as in narrow existing constructions and/or particularly in moving vehicles. As the system corresponds over a wireless network connection, the need for cables and other fittings for this correspondence can be readily avoided.
- Fig. 1 is a schematic overview of the relevant features of a vacuum toilet system according to the invention in the form of a simplified diagram.
- the vacuum toilet system according to the invention will now be described in more detail with regard to the accompanying figures.
- the figures show one way of implementing the present invention and is not to be construed as being limiting to other possible embodiments falling within the scope of the attached claim set.
- Fig. 1 offers a very simplified overview of the relevant components of the vacuum toilet system. Other parts for providing additional effects may of course be applied, but are not shown in the drawing for the sake of simplicity.
- the vacuum toilet system has a toilet bowl 1 connected to an intermediate tank 2.
- a controllable inlet valve 3 is provided between the toilet bowl 1 and the intermediate tank 2 and a controllable outlet valve 4 is provided for discharging waste material from the intermediate tank 2.
- the system further comprises a controller 5 for controlling of the system and its components. The transportation of waste material through the inlet and outlet valves is effected by controlling the pressure in the intermediate tank 2. Pressure in the tank is provided by pressure device 6.
- Such a pressure device may be an ejector unit.
- At least one sensor 7 is connected to the intermediate tank 2 and is also in connection with the controller 5, whereby the controller is adapted to control the system in response to adjustable thresholds of the sensed physical parameter in the intermediate tank.
- the controller 5 may for example send instructions to the relevant components of the system in accordance with the sensed physical parameter so that the system is continuously ready to remove waste from the toilet bowl 1. If for example the sensor registers that the actual negative pressure in the tank 2 is above a certain threshold the pressure device 6 may be applied in order to increase the negative pressure. Thereby the system should be ready at all times to remove waste from the toilet bowl 1 when the inlet valve 3 is opened.
- an A/D-converter 8 that may be applied to process the signal from the sensor 7 into a digital signal according to a specific embodiment of the invention.
- the converter 8 is shown as an individual unit placed between the sensor 7 and the controller 5.
- the converter 8 may also be integrated in the controller 5 (not shown).
- the processing of an analogue signal in the A/D- converter generates a corresponding digital signal that is sent to the controller in order to possibly engage a relevant component of the toilet system, e.g. the pressure device as mentioned above.
- a digital signal corresponding thereto is generated in the A/D-converter and sent to the controller, which will then engage the pressure device 6.
- the controller 5 may preferably be operated and/or monitored remotely through means of a network 9.
- the network may preferably be a wireless network.
- All the components of the system can be adapted to communicate through a network, particularly a wireless network.
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Sanitary Device For Flush Toilet (AREA)
Abstract
The invention relates to a vacuum toilet system comprising a toilet bowl (1), an intermediate tank (2) with a controllable inlet valve (3) between the toilet bowl (1) and the intermediate tank (2) for receiving waste material from the toilet bowl (1) through the inlet valve (3), and a controllable outlet valve (4) for discharging waste material from the intermediate tank (2), and a controller (5) for controlling the operation of the toilet system and its components, where transportation of waste material through the inlet and outlet valves (3,4) is effected by controlling the pressure in the intermediate tank, wherein at least one sensor (7) is connected to the intermediate tank (2) to sense a physical parameter in the intermediate tank (2) and transmit a signal representing the sensed physical parameter to the controller (5), and the controller (5) is adapted to control the operation of the toilet system and its components in response to adjustable thresholds of the sensed physical parameter.
Description
A VACUUM TOILET SYSTEM AND A METHOD FOR CONTROLLING FUNCTIONS THEREOF
The present invention relates to a vacuum toilet system especially for placing in constructions or moving vehicles controlled by a sensor sensing a value of a physical parameter in a monitored part of the system and transmitting a signal to a controller adapted to control the operation of the toilet system and its components in response to adjustable thresholds of the sensed physical parameter. The invention also relates to a method of controlling a vacuum toilet system.
BACKGROUND OF THE INVENTION
The sensing of physical parameters in or around existing vacuum toilet systems for determining/controlling the functionality thereof is typically provided by electromechanical switches such as e.g. pressure switches sending a signal to a central control.
Such electromechanical switches are often exposed to accelerated wear and tear such as increased corrosion risks if the switch is placed in an aggressive environment, which is often the case in the field of vacuum toilets. If damaged, e.g. by corrosion, the switch will not function correctly, if at all. Furthermore, experience with the use of such known switches shows that their tolerance and hysteresis characteristics are too unstable for use in vacuum toilet systems and potentially cause erroneous detections in the system. These potential failures of the known switches may eventually lead to malfunction of the vacuum toilet system as a whole.
Furthermore, with the currently available systems, it is troublesome to alter or adjust the physical parameters being monitored because it is likely to require a replacement of the electromechanical sensor type, which is of course both a costly time-consuming procedure.
There is therefore a need to improve the reliability of the signals that are sent to the central control in order to make the system operate satisfactory and further to
provide a system wherein the type of monitored parameter may be changed or adjusted with only little effort.
OBJECT OF THE INVENTION
It is an object of the present invention to provide a vacuum toilet system comprising a controller adapted to control the operation of the toilet system and its components in response to adjustable thresholds of a sensed physical parameter.
It is another object of the present invention to provide a vacuum toilet system facilitating selection of physical parameters to be monitored in order to control the functions of the system.
It is another object of the present invention to provide a vacuum toilet system having an improved stability and an increased service interval.
It is yet another object of the present invention to provide a method for controlling the functions of a vacuum toilet system and its components in response to adjustable thresholds of a sensed physical parameter.
It is a further object of the present invention to provide a vacuum toilet system in which a monitored physical parameter or threshold values thereof may be easily altered or adjusted.
It is a further object of the present invention to provide a controllable vacuum toilet system that is an alternative to the prior art.
SUMMARY OF THE INVENTION
Thus, the above described object and other objects are intended to be obtained in a first aspect of the invention by providing a vacuum toilet system comprising a toilet bowl, an intermediate tank with a controllable inlet valve between the toilet bowl and the intermediate tank for receiving waste material from the toilet bowl through the inlet valve, and a controllable outlet valve for discharging waste
material from the intermediate tank, and a controller for controlling the operation of the toilet system and its components, where transportation of waste material through the inlet and outlet valves is effected by controlling the pressure in the intermediate tank, wherein at least one sensor is connected to the intermediate tank to sense a physical parameter in the intermediate tank and transmit a signal representing the sensed physical parameter to the controller, and the controller is adapted to control the operation of the toilet system and its components in response to adjustable thresholds of the sensed physical parameter.
The invention is particularly, but not exclusively, advantageous for obtaining a vacuum toilet system in which the operation of the system and its components is controlled on the basis of adjustable threshold value(s) of a selectable physical parameter sensed by the sensor. As the sensor is connected to the intermediate tank the signal may primarily reflect a current physical condition in or around the intermediate tank.
The physical parameter may preferably be chosen among the pressure, the temperature, the flow, a possible choking and/or the cut-off in the intermediate tank. Other parameters may of course be readily chosen and the system may comprise more than one sensor for sensing several different parameters used as a basis for controlling the system and its components.
In an embodiment, the sensor is an analogue pressure transmitter or pressure transducer comprising means for transmitting a signal to the controller. The pressure transmitter may preferably be adapted to transmit an analogue signal representing the sensed physical parameter to the controller or reflecting the sensed value or threshold value of the parameter in the intermediate tank. The use of an analogue sensor such as a pressure transmitter is particularly, but not exclusively, advantageous for obtaining a more reliable detection of the parameter in the intermediate tank than with traditional electromechanical switches. The use of an analogue sensor such as a pressure transmitter will result in less incorrect readings or failures in the system, thus making the operation of the toilet system more stable and facilitating longer service intervals.
In another embodiment, the system further comprises an A/D-converter for converting the analogue signal from the sensor into a digital signal. From the sensed physical parameter, submitted to the A/D-converter as an analogue signal, the converter may generate a digital signal that will cause the controller to operate the system or a particular component of the system in a manner so as to remedy the required action indicated such as, but not limited to, a flushing cycle of the toilet system. In comparison to using traditional electromechanical switches, the use of a pressure transmitter as a sensor and the conversion of the analogue signal received there from into a digital signal will not only offer a more reliable system, but also increase the number of different signals being sent to the controller. Each of the different signals may indicate an instruction to the controller to carry out a specific operation. The use of a pressure transmitter and an A/D-converter thus makes the controlling of the system more flexible.
In further embodiments, the A/D-converter may be an individual unit placed between the sensor and the controller or it may be integrated with the controller. This is particularly, but not exclusively, advantageous for providing a high degree of flexibility in the system as it may be custom-fit to fulfil the requirements of existing conditions or in new constructions.
In another embodiment, the A/D-converter comprises a programmable microprocessor. This is particularly, but not exclusively, advantageous for facilitating an easy programming or re-programming of the choice of physical parameter and/or the parameter threshold value. This may preferably, but not exclusively, be done by using a computer to access the micro-processor of the A/D-converter either locally on site or remotely via a network connection. If performed locally, the A/D- converter may also comprise applicable interface means such as, but not limited to, a standard USB-connection. The A/D-converter may of course also comprise an already pre-programmed micro-processor for controlling the conversion of the signal.
In another embodiment, the system further comprises means for collecting and sending system status information to the controller through a network. Such means may comprise a pre-programmed micro-processor, a storage medium and
a transmitter. The network may be a wired network or a wireless network. Particularly, but not exclusively, the network may be the GSM network.
This is particularly, but not exclusively, advantageous for sending information about the status of the system in the form of e.g. an sms to the controller and/or to a human operator. The information may comprise a message on the need for a service check, usage frequency or other relevant information. Alternatively, the network may also be used for transmittal of the digital signal from the A/D- converter to the controller.
The above described objects and several other objects of the present invention are also intended to be obtained in a second aspect of the invention by providing a method for controlling the operation of a vacuum toilet system comprising sensing of a physical parameter by at least one sensor connected to an intermediate tank and transmitting a signal representing the sensed physical parameter to a controller for controlling the operation of the toilet system and its components in response to adjustable thresholds of the sensed physical parameter.
This second aspect is particularly, but not exclusively, advantageous in that the method according to the present invention may be implemented by using the sensed physical parameter in an intermediate tank of the system to control the system and its components in response to adjustable threshold values of the sensed physical parameter.
In an embodiment, the method further comprises conversion of the signal by an A/D-converter. In comparison to the use of traditional electromechanical switches, as mentioned above in connection with the first aspect of the invention, this provides a higher degree of freedom for controlling the system as the conversion into a digital signal means that more possible instruction combinations may be sent to the controller.
In yet another embodiment of the method, a micro-processor of the A/D- converter is programmed through a network. A micro-processor in connection with the converter may preferably be programmed so as to process the analogue
signal coming from the sensor into a specific digital signal corresponding to the sensed physical parameter. The micro-processor may preferably be programmed to submit different digital signals depending on the value of the analogue signal within the limits of adjustable thresholds. The type of physical parameter and the threshold value(s) may be programmed or adjusted through a network connection. This may be particularly, but not exclusively, advantageous for facilitating programming of the micro-processor from a central control centre or similar. The network connection may be wireless. However, the micro-processor may also be programmable by means of an external personal computer interfaced locally with the converter. This is advantageous for obtaining a swift and easy access on site in order to possibly programme or adjust the parameter or the values thereof.
In yet another embodiment, the transmittal of the signal to the controller is done through a network.
In a further embodiment, the method according to the invention further comprises collecting and sending system status information to the controller through a network.
Preferably, but not exclusively, the network may be an existing wireless network such as the GSM-network.
These embodiments may be particularly, but not exclusively, advantageous under conditions wherein only limited and/or hardly accessible space is available for placing the vacuum toilet system, such as in narrow existing constructions and/or particularly in moving vehicles. As the system corresponds over a wireless network connection, the need for cables and other fittings for this correspondence can be readily avoided.
BRIEF DESCRIPTION OF THE FIGURE
Fig. 1 is a schematic overview of the relevant features of a vacuum toilet system according to the invention in the form of a simplified diagram.
The vacuum toilet system according to the invention will now be described in more detail with regard to the accompanying figures. The figures show one way of implementing the present invention and is not to be construed as being limiting to other possible embodiments falling within the scope of the attached claim set.
DETAILED DESCRIPTION
Fig. 1 offers a very simplified overview of the relevant components of the vacuum toilet system. Other parts for providing additional effects may of course be applied, but are not shown in the drawing for the sake of simplicity.
The vacuum toilet system according to the invention has a toilet bowl 1 connected to an intermediate tank 2. A controllable inlet valve 3 is provided between the toilet bowl 1 and the intermediate tank 2 and a controllable outlet valve 4 is provided for discharging waste material from the intermediate tank 2. The system further comprises a controller 5 for controlling of the system and its components. The transportation of waste material through the inlet and outlet valves is effected by controlling the pressure in the intermediate tank 2. Pressure in the tank is provided by pressure device 6. Such a pressure device may be an ejector unit.
In order to control the operation of the toilet system and its components at least one sensor 7 is connected to the intermediate tank 2 and is also in connection with the controller 5, whereby the controller is adapted to control the system in response to adjustable thresholds of the sensed physical parameter in the intermediate tank. The controller 5 may for example send instructions to the relevant components of the system in accordance with the sensed physical parameter so that the system is continuously ready to remove waste from the toilet bowl 1. If for example the sensor registers that the actual negative pressure in the tank 2 is above a certain threshold the pressure device 6 may be applied in order to increase the negative pressure. Thereby the system should be ready at all times to remove waste from the toilet bowl 1 when the inlet valve 3 is opened.
In fig. 1 is further shown an A/D-converter 8 that may be applied to process the signal from the sensor 7 into a digital signal according to a specific embodiment of the invention. The converter 8 is shown as an individual unit placed between the
sensor 7 and the controller 5. The converter 8 may also be integrated in the controller 5 (not shown). The processing of an analogue signal in the A/D- converter generates a corresponding digital signal that is sent to the controller in order to possibly engage a relevant component of the toilet system, e.g. the pressure device as mentioned above. Hence, if the sensed physical parameter value indicates that the pressure device 6 has to be engaged, a digital signal corresponding thereto is generated in the A/D-converter and sent to the controller, which will then engage the pressure device 6.
The controller 5 may preferably be operated and/or monitored remotely through means of a network 9. The network may preferably be a wireless network.
All the components of the system can be adapted to communicate through a network, particularly a wireless network.
After reading this description it is apparent to one skilled in the art how to implement the invention in various alternative embodiments and alternative applications. It is to be understood that the embodiments as described are presented by way of example only, and not limitation. As such, this detailed description of various alternative embodiments should not be construed to limit the scope or the breadth of the present invention as set forth in the appended claims.
Claims
1. A vacuum toilet system comprising a toilet bowl, an intermediate tank with a controllable inlet valve between the toilet bowl and the intermediate tank for receiving waste material from the toilet bowl through the inlet valve, and a controllable outlet valve for discharging waste material from the intermediate tank, and a controller for controlling the operation of the toilet system and its components, where transportation of waste material through the inlet and outlet valves is effected by controlling the pressure in the intermediate tank, wherein at least one sensor is connected to the intermediate tank to sense a physical parameter in the intermediate tank and transmit a signal representing the sensed physical parameter to the controller, and the controller is adapted to control the operation of the toilet system and its components in response to adjustable thresholds of the sensed physical parameter.
2. A system according to claim 1, wherein the physical parameter is chosen from the group comprising pressure, temperature, flow, choking and/or the cut-off in the intermediate tank.
3. A system according to claim 1 or 2, wherein the sensor is an analogue pressure transmitter or pressure transducer comprising means for transmitting a signal to the controller.
4. A system according to any of claims 1-3, further comprising an A/D-converter for converting the signal into a digital signal.
5. A system according to claim 4, wherein the A/D-converter is an individual unit placed between the sensor and the controller.
6. A system according to claim 4, wherein the A/D-converter is integrated with the controller.
7. A system according to any of claims 5 or 6, wherein the A/D-converter comprises a programmable micro-processor.
8. A system according to any preceding claim further comprising means for collecting and sending system status information to the controller through a network.
9. A method for controlling the operation of a vacuum toilet system comprising sensing of a physical parameter by at least one sensor connected to an intermediate tank and transmitting a signal representing the sensed physical parameter to a controller for controlling the operation of the toilet system and its components in response to adjustable thresholds of the sensed physical parameter.
10. A method according to claim 9, further comprising conversion of the signal by an A/D-converter.
11. A method according to claim 10, wherein a micro-processor of the A/D- converter is programmed through a network.
12. A method according to any of claims 9-11, wherein the transmittal of the signal to the controller is done through a network.
13. A method according to any of claims 9-12, further comprising collecting and sending system status information to the controller through a network.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DKPA200600671 | 2006-05-11 | ||
| DKPA200600671 | 2006-05-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007131512A1 true WO2007131512A1 (en) | 2007-11-22 |
Family
ID=38282891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DK2007/050053 WO2007131512A1 (en) | 2006-05-11 | 2007-05-02 | A vacuum toilet system and a method for controlling functions thereof |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2007131512A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2202126A3 (en) * | 2008-12-23 | 2011-09-07 | Siemens Aktiengesellschaft | Vacuum toilet device for a railway car |
| WO2016062765A1 (en) * | 2014-10-23 | 2016-04-28 | Evac Gmbh | Sanitary unit with monitoring device |
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| GB2079464A (en) * | 1980-05-20 | 1982-01-20 | Autoipari Kutato Intezet | Electrically testing power assisted steering |
| US5007117A (en) * | 1988-12-21 | 1991-04-16 | Oy Wartsila Ab | Vacuum toilet system with simultaneous rinse and discharge |
| WO1994016158A1 (en) * | 1993-01-16 | 1994-07-21 | Sanivac Vakuumtechnik Gmbh | Device for controlling the operation of a vacuum toilet |
| EP1013838A1 (en) * | 1998-12-23 | 2000-06-28 | Evac International Oy | Waste transport arrangement |
| DE20301649U1 (en) * | 2003-02-03 | 2004-06-17 | Evac Gmbh | A vacuum toilet system has an intermediate temporary storage tank and valve system so that the toilet bowl is never directly connected to the vacuum unit |
| EP1752589A1 (en) * | 2005-08-12 | 2007-02-14 | Glova GmbH | A vacuum toilet |
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2007
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2079464A (en) * | 1980-05-20 | 1982-01-20 | Autoipari Kutato Intezet | Electrically testing power assisted steering |
| US5007117A (en) * | 1988-12-21 | 1991-04-16 | Oy Wartsila Ab | Vacuum toilet system with simultaneous rinse and discharge |
| WO1994016158A1 (en) * | 1993-01-16 | 1994-07-21 | Sanivac Vakuumtechnik Gmbh | Device for controlling the operation of a vacuum toilet |
| EP1013838A1 (en) * | 1998-12-23 | 2000-06-28 | Evac International Oy | Waste transport arrangement |
| DE20301649U1 (en) * | 2003-02-03 | 2004-06-17 | Evac Gmbh | A vacuum toilet system has an intermediate temporary storage tank and valve system so that the toilet bowl is never directly connected to the vacuum unit |
| EP1752589A1 (en) * | 2005-08-12 | 2007-02-14 | Glova GmbH | A vacuum toilet |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2202126A3 (en) * | 2008-12-23 | 2011-09-07 | Siemens Aktiengesellschaft | Vacuum toilet device for a railway car |
| WO2016062765A1 (en) * | 2014-10-23 | 2016-04-28 | Evac Gmbh | Sanitary unit with monitoring device |
| CN107000656A (en) * | 2014-10-23 | 2017-08-01 | 埃瓦克有限公司 | Sanitary unit with supervising device |
| US20180023275A1 (en) * | 2014-10-23 | 2018-01-25 | Evac Gmbh | Sanitary unit with monitoring device |
| US10422117B2 (en) | 2014-10-23 | 2019-09-24 | Evac Gmbh | Sanitary unit with monitoring device |
| CN107000656B (en) * | 2014-10-23 | 2020-10-09 | 埃瓦克有限公司 | Sanitary unit with monitoring device |
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