JPS63501521A - pump - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Name: Pump This invention is particularly, but not exclusively, for rinsing sanitary pans. pumping of liquids or discharge means associated with sinks or showers for hand washing. This relates to a pump for pumping water to a tank. This invention is also self-sufficient. Combination of light chamber and pump to provide a liquid or water supply and pumping capacity Regarding.

The invention also provides at least one sanitary pan and/or sink and/or houses shower heads and is suitable for construction sites, expo sites, campground parking lots and Similar locations, i.e. where permanently installed sanitary facilities are not available, circumstances in which the equipment must be installed for use by the Ministry of Labor or others in the field; For use in all aspects of rinsing sanitary pans. Pumping liquids or pumping water to a discharge means associated with a sink or a showerhead It concerns cabins, sheds and similar dwellings in which pumps are installed.

Summary of the invention According to this invention, we can use a flexible member, a flexible member , a variable volume pump chamber comprising at least a portion of the variable volume pump chamber; An inlet valve that allows body fluid to flow in and an outlet that allows fluid to remain in the chamber. Valve, flexible member can be deformed to change the volume of the pump chamber to release liquid. The object of the present invention is to provide a pump comprising operating means for pumping the liquid into and out of the chamber.

In one more particular aspect of the invention, the pump chamber is within the container. arranged, the container including a wall penetrated by the manipulation means, and as a result of the penetration of the manipulation means; some operating means are located outside the container and a pump chamber is located inside the container. and the container is located at least partially within the lamp chamber of the liquid to be pumped. and the container is suitable for allowing passage of liquid from such lamp chamber into the interior of the container. It is something that

The lamp chamber is provided with an opening through which the container extends, and the opening extends through the container through which the operating means pass. Closed by a wall.

The container is at least partially located within the storage space.

Therefore, by simply removing the container from the container, repairs or The pump can be easily removed for maintenance.

A pump is operatively connected to the sanitary pan to draw liquid from the region of the lamp chamber. The pan is flushed by the body and the reservoir area is free from other sanitary pan releases. separated from the area by a filter screen.

The pump is also connected to the discharge outlet associated with the handwashing sink and is pumped to the discharge outlet. Additionally, the pump is connected to the shower head. connected, which pumps water to the shower head.

This invention is suitable for flushing toilets or ship toilets or toilets such as buses, trains, aircraft, etc. Supplying water to sinks and showers on ships, buses, trains, aircraft, etc. Provides self-contained liquid pumping equipment used in a wide range of applications.

If necessary, the lamp chamber consists of two storage chambers, the contents of which are kept separately. , there are two pumps, one pump is used for flushing the sanitary pan in the toilet. One pumps clean water for washing or showering.

The pump is built into the storage chamber and is at least partially immersed in the liquid when in use. .

In a second more particular aspect of the invention, the flexible member is At least a large portion of the variable volume pump chamber is comprised of a sanitary pump. operatively connected to the pan to pump liquid for flushing the pan.

In both more specific aspects of this invention, sanitary pans are key Housed in a yabbin, shed or similar dwelling, the unit is mounted on a base structure. a wall structure, the base structure defining a reservoir, the reservoir receiving a suitable drug solution; Sanitary pans now release this liquid when used. ing.

The container is provided with an imperforate wall on the side adjacent to the discharge of the sanitary pan into the light chamber. , the other side is provided with a perforated wall consisting of said filter screen. .

The filter screen is placed only around the inlet to the pump and is sanitary. - The pan has an external area to said screen that is considered as the dirty side of the filter. The inlet to the pump is located inside the filter screen. is placed on the clear side.

Otherwise, the filter screen is divided into two areas of relatively large volume. Divide the chamber so that the sanitary pan is on the dirty side of the filter screen. The inlet to the pump discharges into the filter screen while the inlet to the pump on the other side of the lane and is considered to be on its clear side.

In either case, the action of the pump, which sucks the chemical solution from the clear side of the storage chamber, is In addition, such chemicals are sucked through the filter screen from the dirty side. replaced by liquid.

The pump of this invention is such that it is at least partially immersed in the liquid of the tank. By adjusting the water level of the tank to the appropriate level, the operating parts can be Suitable for rinsing sanitary pans in one or at most two strokes. A large amount of liquid can be achieved. Additionally, the pump slides inside the cylinder Since it does not have a piston that can The problem of piston sticking due to defects does not occur. Therefore, the pump is , extremely reliable and efficient in use.

A chemical lamp room is installed in a structure where a conventional chemical toilet is installed. part of a unit's structure rather than something that is a separate part, such as a form a section. Such an arrangement results in an even simpler and cheaper structure.

The unit according to the invention houses sanitary pans in separate compartments, respectively. In such cases, each pan can be connected to its own individual chemical lamp, if necessary. associated with a chamber, or two or more pans with their own pumps. They can also be related to the same light room.

One embodiment of this invention, which is a unit housing only one sanitary pan In this case, the entire base structure of the unit consists of a medium which constitutes said lamp chamber for the chemical solution. It is in the form of an empty box, and the top closure of such a box is connected to the floor inside the unit. and is provided with an opening through which the container extends. The box is , which collectively constitute a pedestal-like base structure on which the wall structure of the unit rests. . However, two or more sanitary pans and urinals This invention provides a large In the unit, the reservoir or reservoirs from which such pans emit must be It does not occupy the entire base structure of the servant unit, but rather is a sanitary part. It extends only between small seedlings, including plants. The unit is only one sanitary If the pump has a basin, it may be equipped with a washbasin or urinal, and the pump according to the present invention are provided to pump suitable liquids through them.

Means is provided for emptying the chamber with a suitable ink pulse; The means may include an outlet enclosed by a suitable valve mechanism within the chamber as required. It can also be anything from An overflow tube may be provided within the chamber; This tube has an inlet on the clear side of the filter screen and its outlet. The cut is connected directly to the outleft which empties the chamber. electric heater or color - Means such as a gas or paraffin fueled heater is provided to control the interior of the chamber. Heat to prevent chemical solution from freezing.

Sanitary pans have a conventional U-bend that seals liquids. A liquid seal is provided at the outlet.

The pump of this invention allows sufficient liquid to break the seal provided by the U-bend. pumping, resulting in conventional flushing and sewage discharge operations. It will be done.

Otherwise, the sanitary pan is operated with liquid pumped by a pump. A flap valve at the outlet is provided.

A suitable chemical solution for use in the unit according to this invention is such as those commonly used, which are both a disinfectant and a destroyer of solid waste. Has a function.

The pump chamber may consist of a rigid body of defined volume, which Flexible members are installed which together define a pump chamber.

Inlet and outlet openings may be provided in the rigid body.

The inlet valve is a flexible valve that connects and disconnects from the inlet opening in a part of the main body. It consists of a diaphragm.

An outlet valve is a ball that connects and separates from an outlet opening in a part of the main body. It consists of a valve member like this.

The flexible member is generally cylindrical and is closed at one end and attached to the body. The other end of the connection has an open generally cylindrical wall.

The generally cylindrical wall is a collapsible bellows with a full gate shape. Ru.

The flexible member is 2 operatively connected to and connected to the operating member by an operating link. Thus, movement of the operating member moves the flexible member to increase or increase its volume. Shrink it.

The actuating member moves in a straight line, with rigid actuating links allowing flexible members to Directly connected.

Resilient biasing means are provided to cause the flexible member to be deformed by the operating member. , returning the flexible member to its original state after reducing the volume of the pump chamber. vinegar.

The elastic biasing means acts on the operating member or the operating link.

Otherwise, the elastic biasing means acts on the flexible member and Consisting of a coil compression spring placed within a flexible member, the pump body and flexible Acts between flexible members.

Elastic biasing means, conveniently consisting of a coiled compression spring, surround the operating link. and located in relationship between the operating member and the wall of the container.

Rigid links and elastic biasing means even within flexible sleeves good.

l A riot of angry demons Two embodiments of the invention will be described by way of example with reference to the accompanying drawings, in which: In the drawing, Figure 1 shows a unit according to the invention in the form of a portable cabin. FIG. Figure 2 is a partially cutaway plan view to show part of the interior of the cabin in Figure 1. is: FIG. 3 is a sectional view taken along line 3-3 of FIG. 1, and Figure 4 is a cross-sectional view similar to that of Figure 3, but with reference to Figures 1 to 3. Figure 2 shows a variation of the described embodiment.

1. with a height of about 2.3 meters with a front wall 3 including side walls 1, rear wall 2 and door 4. A unit according to the invention is shown consisting of a cabin of 2 square meters. the structure The body is placed on a pedestal-like base structure 5. The roof 6 of the unit is cup-shaped The structure is a one-piece molded body of plastic material, and when the door is closed, It is sufficiently transparent to the natural light that illuminates the interior of the cabin. The cabin has base Lifting means in the form of ring bolts provided on opposite sides of the part are provided. Ru.

The cabin accommodates a sanitary pan 8 installed on a floor 9. sanitary - To lash the bread, operate the foot pedal 10 and press the pump as described below. This is done by activating the tap.

With particular reference to FIGS. 2 and 3, the pedestal-like base structure 5 of the unit is reinforced. Watertight molded from thermosetting plastic material such as polyester resin It has the shape of a box that receives the discharge from the sanitary pan 8 and A sealed chamber capable of storing suitable chemical liquids used for flushing Alternatively, a storage chamber 11 is provided. The floor 9 of the unit is connected to the light chamber 1 by a separate floor panel. A foot pedal 10 is provided above the pump and operates the pump on a vertical pedal as described later. Designed for riding exercise. The pump is placed in a container 20 such as steel. It is stored. The container may be made of other materials such as suitable plastics materials. You may be

The container has a bottom wall 21, opposite side walls 22.23, opposite end walls 24.25 and a top wall 26. It has a roughly rectangular box shape. The top wall 26 projects outwardly from the side walls 22.23. to form a flange 27, and the flange opens into the opening 2 provided in the upper wall 11a of the lamp chamber 11. Overlapping the two opposite sides of 7a, the flanges are secured by fasteners 28.

In this way, the container can be placed freely in most parts of the storage chamber and simply Loosen fasteners 28 and remove the container and associated pump from the lamp chamber, as described below. By lifting, the container can be quickly and easily removed from the lamp chamber 11. Wear.

The side wall 23 and the two opposing end walls 24,25 are made of a suitable filter mesh material. However, the bottom wall 21 and the other side walls 22 have no holes.

A hard main body 31 of a pump 32 is fixed to the bottom wall 21. The main body part 31 has a port It is made as a molded article of a suitable synthetic resin material such as polyethylene.

A rectangular opening is formed in the side wall of the body 31 as shown at 31a to provide a liquid inlet. The perforated plate 33 extends inside the pump body 31 at an angle of about 18° to the horizontal axis. The rivet 3 has a permanent spring that traverses at an angle and leaves the opening 35 in the plate 33. A circular diaphragm 34 made of vinyl chloride is fixed to the plate 33 by 6. be. The diaphragm 34 is opened by the action of pressure on the diaphragm, as will be described later. It is deformable so as to sealingly engage the plate along the circumference of the opening 35. Ru.

The pump body 31 is provided with an outlet 37, into which a polypropylene bow is attached. The seat insert 37 is formed on the insert and the seat insert 738 is engaged with the groove 39. It is maintained at a high level. A ball-shaped valve member 40 is provided and insert 37 It is movable so as to be in sealing engagement with a receiving seat 41 provided in the. ball 40 is provided in the discharge pipe 43 connected to the flash vibrator 44 of the sanitary pan 8. It is held in place by a housing 42.

The pump body 31 is provided with a generally cylindrical portion 50, to which a clamp is attached. A flexible pan O-zu 52 made of vinyl chloride is clamped via a coupling 51. has been done. The bellows 52 is 1, full to provide a collapsible bellows. The gate shape has a roughly cylindrical shape with roughly cylindrical walls, and a pre-shaped a closed top wall 54 connected to the plate 55, from which the operating rod or A link 56 passes through an opening 57 in the upper wall 26 of the lamp chamber 20 and extends upward. Earthen wall 2 6 is provided with a bearing 58 for vertical sliding movement of the rod 56. invite. The bellows 52 is connected to a variable volume pump. coil compression spring A ring 59 surrounds the rod 56 and engages between the plate 26 and the foot pedal 10. , press the foot pedal 10 upward and press the foot pedal 10 to make the bell smaller. After being compressed into a large volume, the bellows 52 is returned to its original position in the large volume. flexible A solid rod cover receives the foot pedal 10, the rod 56 and the spring 59. The rod 56 and the sprocket between the floor plate 9, which has a hole as shown at 61, It is provided around the ring 59.

In practical use, the bulb body 31 and at least a part of the bellows 52 are connected to the lamp chamber 1. 1 is immersed in the chemical solution.

When the user presses the foot pedal 10 with his/her foot, it urges the O-rad 56 downward, thus causing the O-rad 56 to move downward. The diaphragm 34 is compressed to close the inlet 35 and receive the ball 40. lift it off the seat 41 and thus pass the empty liquid contents of the pump into the supply tube 44 and Flash tally pan 8. The pump mechanism pumps the liquid in the lamp chamber 11. Since the dimensions are related to the normal water level of If the crop is normal, it will be sufficient to purify the bread. User removes foot from pedal When lifted, spring 59 returns the pedal and therefore the bellows to its original position. , the ball valve 40 is brought into close contact with the receiving seat 41, and the diaphragm 34 is inserted from the inlet 35. release, so that liquid is drawn into the pump via inlet 35 and inlet 31a. .

Only chemical solutions containing no solid substances are used for flushing sanitary pans. - In order to ensure the supply to the pan 8, the filter mesh 20 described above is installed. are provided on the side surfaces 23, 24, 25 of the container 20, and the container 20 has a non-perforated side surface. 22 is positioned adjacent to the waste water discharge part of the sanitary pan 8. So As a result, the liquid supplied via the pump mechanism is free of solid matter. Must If necessary, an additional screen or screens may be provided on the outside of the container. One of the regions contains the container 20 and the other contains the discharge pipe of the sanitary pan 8. It may be divided into two areas including the exit.

The lamp chamber 11 includes a valve member associated with the discharge pipe at the bottom rear of the storage chamber 11. means are provided for emptying the sky. What kind of control is the valve mechanism? It may also be a conventional one, which is not shown here.

Similarly, the lamp room is equipped with an overflow tube whose artificial end is close to the top of the sky. located adjacent to each other, and connected at the other end to the aforementioned discharge pipe.

The unit is used to prevent the liquid in the light chamber 11 from freezing during cold weather. Built-in heating means. The heating means is in the form of a submerged electric heater (not shown). after a base structure with an exit door, the head of which is not shown. It is housed in a compartment connected to the wall. Heating required for submerged electric heater The material is passed through the interior wall of the compartment and immersed in the liquid.

The compartment may be equipped with other heating means such as gas burners or paraffin lamps. It is large enough to fit.

The sanitary pan 8 has a bottom part that discharges directly into the lamp chamber 11 through a hole in the floor 9 of the unit. It is a regular vitreous porcelain flushing pan with an outlet. Sanitary pan 8 , which is conventionally bent in a U shape, between the flushing pan and the storage chamber 11. Provides a liquid seal. The unit will supply water to the basin when installed. Contains supplies such as water tanks and hand dryers or paper towel containers. You can also be made to do so. If a washbasin is installed, if necessary, A pump similar to the one above but smaller was installed at the sink for hand washing purposes. pump water from the storage tank to the discharge outlet associated with the tank.

The unit may also be adapted to house a shower, with a pump similar to that described above. Used to pump water from the storage tank to the shower rad.

Referring now to FIG. 4, reference will be made to FIG. A modified example of the pump is shown. According to this invention in this modification, This unit is characterized in that the floor 9 is composed of the upper polyester resin wall of the light chamber 11. except as described with respect to FIGS. 1 and 2. In Figure 4 , parts that are the same as those used in Figures 1 to 3 are designated with the same reference numerals and a dash. The ones marked are used.

In this variant, the pump 32° is located at a medium density with a hole marked 20a. It is installed inside a 20° container made of polyethylene. In this example In this case, the function of the perforated plate 33 shown in FIG. 3 is integrated with the rest of the container 20°. A circular diaphragm 34 of vinyl chloride with a correspondingly inclined section 33° molded into The diaphragm has an opening 35° provided in the section 33°. A permanent bias is applied away from the part 3 with a 36° rivet. It is fixed at 3°. The diaphragm 34°, as in the first embodiment, By applying pressure to the diaphragm, the area 33° around the opening 35° is tightly closed. It is something that can be transformed to Partially hanging from 33° The 20° portion of the container constituting the circular wall 70 has an opening similar to the opening 31a in the first embodiment. An open lower lower part 1 is provided for this function.

The pump body 31° is substantially similar to that described with respect to the first embodiment! , 70 and is placed within the container 20° in engagement with the upright body by portion 33°.

The pump body 31° is made as a molded body of medium density polyethylene and is secured with a suitable screw. It is fixed to the container 20゛. In this embodiment, the seat 41° of the valve receiver is The insert has the shape shown in Figure 4 and is a generally channel-shaped molded body of ABS. 37°. Valve member 40° is made from medium density polyethylene made and filled with sand to constitute the desired mass.

The top of the container 20° includes a top wall portion 26° having a depending peripheral flange 26a°. The flange is closed by, for example, a self-tapping screw. It is fixed to the overlapping part of the side wall of the container at 20°.

In this embodiment, the container 20' is placed on the bottom wall 11a of the lamp chamber 11 and opened. The walls of the mouth 27°a retain the container 20° from rolling. Thus, the pump load is at the bottom is transmitted to the wall 11'a.

In a manner similar to the bearing 58° of the embodiment described with respect to FIGS. Earthen wall 2 that receives the nylon bearing bushing 58” that guides the operating rod 56° Pocket 73 cooperating with a similar but upwardly facing pocket 74 located at 6°. The bearing retaining plate 72 having a It is fixed to the lower side of the wall 26°. In this embodiment, the rod 56 is There is no coil compression spring corresponding to the coil compression spring 59, and there is no coil compression spring. The flexible rod cover 60° easily attaches to the top surface of the earth wall 26° due to its inherent elasticity. It is placed.

A coil compression strip surrounds the rod 56 and is located around a raised circular flange 74. Instead of the spring 59, it is placed inside the bellows 52° and connects the valve body 31°. Large diameter coil compression spring 59 acting between lower bellows plate 75 " is installed and the plate cooperates with the upper bellows plate 76 and the upper bellows plate 76 A nut 79 and a washer 8 screw the rose plate 76 onto the end of the Orad 56. As a result of the tightening action by , the upper part 77 of the bellows 52° is clamped between said plates. bellow bellows and bellows note 75.76 to hold the spring in place. , to provide a conical depending portion 81 that engages within the upper end of the spring 59''. is formed. The 59° spring is made of corrosion-resistant stainless steel. Preferably.

The upper and lower plates 75, 76 are made of ABS and have bellows 52" and rod cover 60' are made of plastic vinyl chloride.

In this embodiment, the discharge pipe 43° of the housing 42° is connected to the upper wall of the container 20°. 26° and into the flash vibrator 44 described with respect to FIGS. 1 to 3. It can be connected to the flush pipe of a similar sanitary pan 8.

In all other respects, the pump, in its mode of operation, corresponds to that of FIG. Similar to that described with respect to FIG. The above differences are due to pump manufacturing and In order to facilitate the molding of the enclosure with medium density polyethylene, the bellows 5 Positioning the spring 59' within 2' allows the use of larger diameter springs. As a result, greater recovery is achieved while keeping the elastic modulus within a range acceptable to the user. Return force can be achieved. In practical use, springs are frequently inspected for spring maintenance. There is no need to approach the clamp ring 5° even if it is necessary to approach it. It turns out that it is relatively easy to approach if you relax. enclosure Jua 20° and its built-in pump 32° can be easily and easily accessed from the light chamber 11. The ability to provide removable subassemblies should be appreciated. Ru.

Water sealing holes installed on conventional sanitary pan rivets as required. Instead of plastic wrap, sanitary pans may contain water operated by a pump. A flap valve may be provided.

In both illustrated embodiments, the upper wall 26, 26° of the container is connected to the penetrating operating means. shall effectively close the top of the container, except for a passageway of sufficient size, but not necessary. Depending on the requirements, the earthen walls may be smaller and only constitute the top edge of the side walls of the container. It's okay. In this case, other means such as the floor of the unit or another member may be placed above the container. suitable means may be provided in the guide of the operating member.

The pump shall be provided in combination with a container that provides the 6 plants with liquid to be pumped. should be observed. The combination of light chamber and pump pumps sanitary liquid. Sanitary spaces such as latrines or ship latrines or latrines on buses, aircraft, trains, etc. It is provided for cleaning the toilet.

In such applications, manufacturers of ships, trains, buses, aircraft, etc. The pan and all other necessary parts are installed in the relevant part such as a ship, and the pump according to this invention is The combination of tap and light chamber is connected in place. Alternatively, if necessary The sanitary pan is a combination of a pump and a light chamber, and is used on ships etc. A self-contained unit that can be received in a suitably prepared area is installed.

Alternatively, in practical use, 6 to 6 is connected to a washbasin or shower, etc. It can also be made to provide clean water.

Furthermore, the lamp chamber may be divided into two separate lamp chambers, one of which Flushing a sanitary pan with one pump according to the first aspect of the invention the first seven subvectors of this invention; A second pump is included to supply water for washing, showering, etc.

The embodiments described in connection with FIGS. 1 to 3 and the embodiments described in connection with FIG. In a variant, the storage chamber may be installed as part of the base plinth of the unit. However, if necessary, six rooms may be installed on the floor of the unit or in combination with the above. A stand may be provided that is placed in another area where things are installed.

The pump constituting the invention has the following advantages: it has fewer moving parts; maintenance service can be extended; if the pump assembly It can be easily removed by simply removing the container and reinstalling it as described above, so it is easy to maintain. Maintenance service is easy. Therefore, for maintenance services and inspections, all All parts are easily accessible and the entire pump can be removed from the top of the chamber for repair and re-installation. Because the pump can be installed in a Not. This prevents a rather costly loss of cleaning fluid; This is especially important when the tank has only been filled for a short time and is not low.

If required, a flexible part that makes up the bulk of the variable volume pump chamber can be installed. The cylinders described herein can be used as long as they pump a sufficient amount of liquid as described above. Shapes other than the drastic bellows shape may also be used.

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Claims (14)

[Claims] 1. At least partially composed of flexible members or flexible members A variable volume pump chamber with an inlet that allows liquid to flow into the chamber. Flexible outlet valve and outlet valve that allows liquid to remain in the chamber. The member is deformed to change the volume of the pump chamber and pressurize liquid into and out of the chamber. A pump consisting of operating means for pumping. 2. The pump chamber is arranged within a container, the container having a wall pierced by the operating means. as a result of the penetration of the manipulating means, the manipulating means being disposed external to the container, and , a pump chamber is disposed inside the container, said container having a reservoir for the liquid to be pumped. The container is adapted to be located at least partially within the chamber, the container being suitable for removing the volume from such storage chamber. A pump according to claim 1, which is suitable for allowing passage of liquid into the interior of the container. 3. The storage chamber is provided with an opening through which the container extends, the opening being a volume through which the operating means passes. A pump according to claim 2, which is closed by a wall of the container. 4. The container is provided at least partially within the storage chamber and is removable. Pump according to required range 2. 5. A pump is operatively connected to the sanitary pan to draw it from the area of the reservoir. The area of the reservoir is flushed with the liquid that the sanitary pan releases. According to claim 2 separated from other areas by a filter screen pump. 6. The flexible member covers at least a large portion of the variable volume pump chamber. The pump is operatively connected to the sanitary pan to pump liquid to clean the van. A pump according to claim 1 which flushes water. 7. The sanitary pan is housed in a housing, and the unit is installed in a base structure. the base structure defines a reservoir, the reservoir containing a suitable drug solution; A sanitary van is billed as being constructed to emit liquid when in use. Pump according to range 5 of. 8. The container is provided with a non-perforated wall on the side adjacent to the release of the sanitary pan into the storage chamber. and the other side is provided with a perforated wall consisting of said filter screen. A pump according to claim 5. 9. The unit houses only one sanitary van and the entire base structure of the unit The body is in the form of a hollow box that constitutes a storage chamber for the medicinal solution, such as The upper closure of the box forms the floor within the unit and onto which the container extends. The box as a whole is provided with an opening extending through the wall on which the wall structure of the unit rests. 8. The pump according to claim 7, comprising a pedestal-like base structure. 10. The pump is disposed within the reservoir so that it is at least partially immersed in liquid during use. A pump according to claim 5, which is arranged in a. 11. Sanitary vans have a conventional U-bend that seals liquids. The discharge part is provided with a liquid seal, and the pump is connected to the seal provided by the U-bend. 6. A pump according to claim 5, suitable for pumping sufficient liquid to destroy a cell. 12. Sanitary pans have a discharge section that is operated by a liquid pumped. 6. A pump according to claim 5, wherein the pump is provided with a flap valve. 13. Flexible members are generally cylindrical, with one end closed and the main A pump according to claim 1 having a generally cylindrical wall whose other end connected to the body is open. . 14. The flexible member is a collapsible bellows with a corrugated shape. A pump according to claim 1.