EP3737807A1

EP3737807A1 - An open top portable pissoir unit

Info

Publication number: EP3737807A1
Application number: EP19701758.5A
Authority: EP
Inventors: Gina Terry Carolina PÉRIER; Alexander Højland EGEBJERG
Original assignee: Lapee Aps
Current assignee: Lapee Aps
Priority date: 2018-01-12
Filing date: 2019-01-11
Publication date: 2020-11-18
Also published as: DK201870023A1; DK179828B1; WO2019137592A1

Abstract

A portable open top pissoir unit includinga wall comprising sections defining individual urinal stalls and having two opposite skins defining a hollow space, the hollow space communicating with a bottom recess delimited by an outer skin of the two opposite skins, an inner skin of the two opposite skins facing the stall being integral with or being connected to a raised pissoir unit bottom defining a stepping surface for a person using a stall of the pissoir unit.

Description

An open top portable pissoir unit

Field of the invention

The present invention relates to the field of portable open top pissoir units, of the type that may be moved from a storage facility to a site of temporary use.

Background

Portable open top toilets, in the following referred to as open top pissoirs, are well known in the art, see by way of example US2009/0188025, US2010/0058518, WO2015/033007, W02007/094656, http://www.iprefer- paris.net/201 1/07/modern-day-pissoirs.html and www.zdnet.com/article/fi- nally-a-urinal-for-girls/.

While some of the prior art portable pissoirs have gained widespread use prob- lems arise when they are transported from a storage facility to the site of tem- porary use, during which transport the prior art pissoir units are typically placed next to each other on a truck body or stacked on top of each other, as shown in fig. 6 of WO 2007/094656, where a top projection of a lower unit is accom- modated in an indentation in the bottom of the upper unit, similarly to the stack- ing principle followed with the telescopic pissoir unit shown in fig. 7 of WO 2015/033007. Specifically, the prior art pissoir units involve the problem that relatively few pissoir units may be stacked and then transported on a truck body due to restrictions caused by road obstacles, such as bridges.

Another problem resides in the prior art portable pissoir units not being fully suitable for female users; typically they are perceived as being uncomfortable in use or as providing a visually unprotected environment. Summary

The present invention provides a unitary pissoir unit, preferably molded in one piece through rotational molding, allowing a compact stacking of several iden- tical units while at the same time providing for a safe environment for a user, for easy cleaning, for low cost manufacturing, and/or for use together with a high volume urine reception tank.

More specifically, the aforementioned problems are solved through a wall structure of the pissoir unit comprising sections defining individual urinal stalls and having two opposite skins defining a hollow space, the hollow space com- municating with a bottom recess delimited by an outer skin of the two opposite skins, an inner skin of the two opposite skins facing the stall being integral with or being connected to a raised pissoir unit bottom defining a stepping surface for a person using a stall of the pissoir unit.

In one embodiment the pissoir unit of the invention may be specifically config- ured for female users. Embodiments of the invention are defined in the appended claims.

Brief description of the drawings

Fig. 1 a is a schematic perspective view of a stack comprising four identical stackable and portable open top pissoir units, each according to a first embod- iment of the present invention,

Fig. 1 b is a top view of five individual pissoir units of the first embodiment, placed for storage in a closely fitting relationship next to each other, Fig. 2 is a schematic view of the various procedures involved in the transport- ing of the pissoir unit of the invention,

Fig. 3 shows the pissoir unit of the first embodiment used together with a sep- arate urine reception tank,

Fig. 4a is an enlarged top view of the pissoir unit of the first embodiment,

Fig. 4b is a vertical cross-sectional view of the pissoir unit of fig. 4a along line C-C,

Fig. 4c is a view similar to fig. 4b, showing a stack of the pissoir units of fig. 4b,

Figs. 5a and 5b illustrate a“step-right-in” variant of the first embodiment, in perspective top and bottom views,

Fig. 6a is a schematic view showing the first embodiment of the pissoir unit of the invention adapted for female users, with certain features not visible from the outside of the pissoir unit being shown in broken lines,

Figs. 6b and 6c are partial, vertical cross-sectional views similar to fig. 4b along line C-C in fig. 4a,

Figs. 7a-7c are perspective sectional and full views of an exemplary urinal for use with the pissoir unit of the invention,

Figs. 8a and 8b are perspective and top views of a second embodiment of the pissoir unit of the invention, Figs. 9a and 9b are schematic cross-sections and perspective bottom views, respectively, of a part of a mold for rotational molding of the pissoir unit of the invention, and

Figs. 10a-10c are horizontal cross-sectional views from above taken at differ- ent levels through the pissoir unit of fig. 4a, fig. 10c showing a cross-sectional view below the stall bottom and indicating the location of the urinals openings located thereabove in broken lines,

Figs. 1 1 a-1 1 b are perspective top and bottom views of a third embodiment of the pissoir unit,

Fig. 12 is a perspective top view of the third embodiment showing a wall used with a bottom sub-assembly of the pissoir unit,

Fig. 13a is a perspective view of a lifting engagement structure of a wall and an attachment device of a bottom sub-assembly, and

Fig. 13b is a perspective view of the sub-assembly of Fig. 1 1 a with an attach- ment device in a retracted position.

Detailed description

The invention will now be explained in more detail below by reference to three embodiments.

Fig. 1 a is a schematic perspective view of a stack comprising four identical stackable and portable open top pissoir units 1 , each according to a first em bodiment of the present invention. In use the pissoir units 1 are placed individ- ually at a selected site of use, such as at a festival ground, either in a group of similar pissoir units 1 or standing alone on the ground surface G. The stackable pissoir unit 1 of the present invention and to be described in further details below is a molded unitary structure formed from eg. polyeth- ylene, preferably made through a rotational molding process. Generally, the vertical height H of each pissoir unit 1 may be in the order of 140-200 cm, possibly with some variation within that range for each pissoir unit 1 , but other dimensions may be foreseen.

Fig. 1 b is a top view of five individual pissoir units 1 of the first embodiment, placed for storage in a closely fitting relationship next to each other on the ground surface G or other supporting surface of a pissoir unit 1 storage facility.

The shown pissoir units 1 each have three stalls 30, 40, 50 separated from each other by sections 32, 42, 52 of a wall generally referred to in the following by reference numeral 10. The sections 32, 42, 52 extend from a vertical axis X passing through the centre of mass of the pissoir unit 1. Alternatively, an- other number, such as four, similar stalls may be provided, with a correspond- ing number of wall sections extending from the axis X. Each stall 30, 40, 50 has a urinal 100, preferably adapted specifically for use either by a male or by a female user, as seen in fig. 1 b. The wall sections 32, 42, 52 preferably are configured to reduce or eliminate direct visibility from the outside of the pissoir unit 1 of the side of a user using the urinal 100. For the shown first embodiment portions of the wall sections 32, 42, 52 are curved and follow the general outline of the arc of a circle; other outlines of the wall sec- tions 32, 42, 52 may be selected without departing from the invention.

Shown also in fig. 1a is an eye defining a lifting engagement structure 2 of the pissoir unit 1 and being engageable by a mobile lifting apparatus 500 operating on a ground surface G, as shown in fig. 2, for moving the pissoir unit 1. The lifting engagement structure 2 is positioned at the vertical axis X above the centre of mass of the pissoir unit 1 to allow for a balanced lifting of the pissoir unit 1 , as also shown in fig. 2, whereby the pissoir unit 1 will remain upright during lifting. The lifting apparatus 500 engaging the engagement structure 2 may be operated at the site of use of the pissoir unit 1 and/or at the storage facility, and may be used in the process of forming a stack of the pissoir units 1 , or for destacking. At a lower portion 7 of the pissoir unit 1 preferably may be arranged dedicated base portions B configured to be engageable for portability by a fork lift 510 to allow for shifting of a stack of pissoir units 1 , or of a single pissoir unit 1 , across the ground surface G. Using the fork lift 510 the pissoir units 1 may be placed on a truck body for transport from a storage facility to a site of use; alternatively, where the pissoir units 1 are locked together in a stack as shown in fig. 1 a the lifting apparatus 500 may be used for lifting the entire stack by engaging the engagement structure 2 of the uppermost pissoir unit 1 of the stack. It is noted that engagement structures 2 in the form of anchors with eyes anchored to the molded pissoir unit 1 may be used; alternatively, by way of example, the lifting apparatus 500 may engage holes 2 formed in the wall 10.

Fig. 3 shows the pissoir unit 1 of the first embodiment used together with a separate urine reception tank 1 10 configured for being received by the pissoir unit 1 and preferably following the general outline of the pissoir unit 1 for max- imum capacity. Preferably, the lower portion 7 of the pissoir unit 1 has a pe- ripheral edge or flange 14 via which the pissoir unit 1 may rest on the ground surface G, with the reception tank 1 10 having a base or peripheral edge 1 14 similarly configured for resting on the ground surface G inside the lower portion 7. The reception tank 1 10 received by the pissoir unit 1 is generally not visible in use where by the action of gravity it receives urine from the individual urinals 100, i.e. from each stall 30, 40, 50; where no reception tank 1 10 is provided the urinals 100 may be connected by a pipe connection to a sewer (not shown). Fig. 4a is an enlarged top view of the pissoir unit 1 of the first embodiment; fig. 4b is a vertical cross-sectional view of the pissoir unit of fig. 4a along line C-C and illustrating some of the general, inventive features of the present invention.

As shown in fig. 4b, a pissoir unit 1 top portion 5 integrally molded with the aforementioned lower portion 7 generally defines a free upper edge 12 of the open top pissoir unit 1 , with the wall 10 tapering towards the free upper edge 12. As seen best in fig. 4b, the wall 10 in accordance with the invention is formed as a hollow structure by each of the sections 32, 42, 52 being defined by two slightly inclined and converging opposite skins 16, 18, preferably each having an inclination to the vertical in the order of 1 °-5°, such as 1 .46°, and preferably having an essentially constant and uniform thickness following from a rotational molding process, the opposite skins 16, 18 being separated by a downwardly open hollow space 20 extending from the axis X.

The opposite skins 16, 18 of each section 32, 42, 52 have respective outer faces 17, 19 facing away from the hollow space 20 to define the surfaces of the wall sections 32, 42, 52 visible in normal use of the pissoir unit 1 . By way of example, and referring to the first embodiment shown in figs. 4a and 4b, for the wall section identified by numeral 32 the skin thereof referenced by nu- meral 18 has its outer face 19 facing the stall 30 while for the wall section identified by numeral 52 a skin thereof has its outer face 19 facing the outside of the pissoir unit 1 . The skins, or portions thereof - such as the curved portion of skin 16 of section 32 shown in fig. 4a - having a face 17 oriented away from the hollow space 20 and towards the outside of the pissoir unit 1 to define at least a portion of the outer contour of the pissoir unit 1 will be referred to herein as the“outside skin”, and preferably defines at the same time the aforemen- tioned peripheral edge 14.

More specifically, as seen in fig. 4c, the lower portion 7 of the pissoir unit 1 is defined by an integral lower portion of the skin that has its outer face facing the outside of the pissoir unit 1 . The lower portion 7 defines a downwardly open recess R which in use of the pissoir unit 1 receives the tank 1 10, which recess R communicates with the downwardly open hollow space 20.

The aforementioned downwardly open recess R and hollow space 20 is ac- cording to the invention configured for receiving an upper portion P of the ta- pering wall 10’ of an identical, subadjacent (lower) pissoir unit T of a stack of the pissoir units, as seen best in fig. 4c, preferably also with at least a portion 7’ of the lower portion 7 of the subadjacent pissoir unit T being receivable in the recess R of the upper/super adjacent pissoir unit 1 for compact stacking, with preferably around 80%-90% of the subadjacent pissoir unit T being re- ceivable by the superadjacent one, such as after proper orientation/turning of the superadjacent one about the axis X. This preferably follows from the wall 10 tapering evenly towards the free upper edge 12 and from the horizontal distance between the opposite inner faces 17’, 19’ of the skins 16, 18 varying in accordance with the variation in the overall thickness of the wall 10, i.e. with the variation in the horizontal distance between the outer faces 17, 19 of the skins 16, 18 of the wall 10. The wall 10 may as shown be provided with a stop 3 for limiting the extent to which the wall 10’ of the subadjacent pissoir unit T may be introduced into/received by the hollow space 20 of the super adjacent pissoir unit 1 , to ensure that the pissoir units 1 , T do not become too hard to release from one another due to contact friction.

Referring still to figs. 4a and 4b an upright, preferably slightly inclined end 33, 43, 53 of each wall section 32, 42, 52 is shown. This upright end 33, 43, 53 of each wall section 32, 42, 52 defines between a nearest, opposite wall section 52, 32, 42 an access A into a respective stall 30, 40, 50, via a step 36, 46, 56. Figs. 4a-4c shows the first embodiment of the invention in a“step-left-in” vari- ant where a user moves to the left for reaching the urinal 100 after having entered the stall via the access A. Figs. 5a and 5b, to which reference will now be made, illustrate a“step-right-in” variant of the first embodiment where a user moves to the right for reaching the urinal (not shown) of the stall 35, 45, 55 entered via the access A.

Figs. 4b, 5a and 5b show that each stall 30, 40, 50 is defined in addition to the respective wall sections 32, 42, 52 by a respective elevated stall bottom 35, 45, 55 connected to a lower edge L of the inside skin, i.e. the skin/skin portion having an outer face oriented towards the inside of the respective stall 30, 40, 50, to ensure high stability of the pissoir unit 1 and to provide a stepping sur- face above the tank 1 10. Preferably, the stall bottoms 35, 45, 55 are formed as an integral part of the pissoir unit 1 , the connection with the lower edge L of the wall skin facing the inside of the stall 30, 40, 50 being established during the rotational molding procedure. In an alternative embodiment the stall bot- toms 35, 45, 55 may be connected to the wall 10 after the molding procedure, preferably via a permanent connection, to remain connected with the wall 10 in the future use of the pissoir unit 1 . Urinal 100 receiving openings 38, 48, 58 are formed in the stall bottoms 35, 45, 55.

As seen best in fig. 6b, in the shown first embodiment the stall bottoms 35, 45, 55 comprise an integrally molded raised wall 37, 47,57 delimiting together with the aforementioned inside skin of the wall 10 a respective one of the openings 38, 48, 58.

The aforementioned openings 38, 48, 58 are for receiving a complementary, preferably removable urinal 100 in fluid communication with the urine reception tank 1 10, as will be explained later with reference to i.a. fig. 4b.

Each elevated stall bottom 35, 45, 55 provides a surface that a user may step up to from the level of the ground G in that the stall bottoms 35, 45, 55 are at a distance from the lower peripheral edge 14. For the shown embodiment the stall bottoms 35, 45, 55 include a further step 36, 46, 56 provided at the access A; this allows for placing a high volume urine reception tank 1 10 between the ground G and the stall bottoms 35, 45, 55 and may also be of particular ad- vantage where the pissoir unit 1 is adapted for use by female users, as shown in fig. 6a. The lower surface of the stall bottoms 35, 45, 55, such as of the further step 36, 46, 56, conveniently may define a base portion B configured to be engageable by direct contact by a fork lift 510 to allow for shifting of a stack of pissoir units 1 , as mentioned above in connection with fig. 2.

Turning briefly to fig. 6a, as shown, the first embodiment of the pissoir unit 1 of the invention is adapted for female users by the stall bottoms 35, 45, 55 being located at such a height that a female user in squatting position will have her eyes at substantially the same level as the eyes E of a person of average height standing outside the pissoir unit 1. By forming the free upper edge 12 of the pissoir unit 1 at this level the female user is able to monitor the pissoir unit 1 surroundings for any threats/disturbing elements by looking over the free edge 12 while at the same time the wall section 32, 42, 52 defining the stall 30, 40, 50 reduces or eliminates direct visibility of her side from the outside of the pissoir unit 1 . Generally, for this the level of the stall bottom 35 stepping surface within a stall is formed so as to be located at a height h above ground level G or above the lower peripheral edge 14, corresponding to between 15% and 40%, preferably between 20% and 30%, of the total height H of the pissoir unit 1 . Armrests (not shown) may be provided for suitable support of the female user in squatting position.

Figs. 6b and 6c are partial, vertical cross-sectional views similar to fig. 4b along line C-C in fig. 4a and representative of a urinal receiving opening 38, 48, 58 in some or all of the stalls 30, 40, 50. Schematically shown is a portion of the wall 10 and the stall bottom 35 of one of the stalls 30, together with a small height raised wall 37 being an integral part of the bottom 35 and the inside skin 18, delimiting together with the inside skin 18 a respective one of the openings 38, 48, 58. The opening 38 may have been formed in a cutting operation fol- lowing rotational molding of the pissoir unit 1 . A urinal 100 is mounted to the openings 38, 48, 58. In the shown example, from an upper edge 37’ of the raised wall 37 is suspended an oval urinal 100 formed as a bowl having a drain 105 and an outwardly extending rim for being suspended on the upper edge 37’, as shown in figs. 7a-7c. Before use of the pissoir unit 1 a urinal 100 is inserted into each opening 38, 48, 58, and the urinal 100 may be moved either for rinsing after use of the pissoir unit 1 or for the purpose of introducing a suction pipe into the tank 110, for emptying thereof. A tissue paper receiving part 103 communicating with a separate tis- sue paper container (not shown) may also be provided.

Figs. 8a and 8b show a second, two-stall 30, 50 embodiment of a molded uni- tary pissoir unit 1 of the invention, and particularly suitable for standing up male users. Only two wall sections 32, 52 of the wall 10, each comprising portions at 90 degree to one another, are provided, extending each from the vertical axis X, and the two stalls 30, 50 have a raised stall bottom 35, 55 providing space for a urine reception tank (not shown). Openings 38, 58 for receiving a urinal 100 in the form of a removable bowl or similar structure, as shown by way of example in fig. 7c, for receiving urine may be provided, and the inside skin facing the inside of each stall 30, 50 and/or the bottom 35, 55 may have a recessed portion or area 90 defining a splash zone and/or a inclined surface for guiding urine towards a respective opening 38, 58 of the stall 30, 50. For stacking the pissoir unit 1 according to this second embodiment the wall 10 the wall 10 is formed at described in connection with fig. 4b with downwardly open hollow spaces 20 between the opposite skins of the wall section 32, 52 com- municating with a recess R. Specifically, the wall 10 tapers towards the free upper edge 12 and the horizontal distance between the opposite inner faces the skins 16, 18 vary in accordance with the variation in the overall thickness of the wall 10, i.e. with the variation in the horizontal distance between the outer faces 17, 19 of the skins 16, 18, of the wall 10. The wall 10 may be again provided with a stop/stops for limiting the extent to which the wall 10’ of a subadjacent identical pissoir unit may be introduced into/received by the hol- low spaces 20 and recess R of the super adjacent pissoir unit 1 , to ensure that the pissoir units are not too hard to release from one another due to contact friction.

Figs. 9a and 9b show a partial cross-sectional view and a perspective bottom view of a mold 200 suitable for rotational molding of the pissoir unit 1 according to the first embodiment of the invention and, with slight modifications also for the second embodiment described above. During the molding process a plas- tic material layer will be formed in contact with the removable mold base 201 ; this layer is cut away to open up into the inside of the pissoir unit 1 , thereby providing the aforementioned downwardly open space 20.

Turning to Figs. 1 1 a-10b and 12, a third embodiment of the pissoir unit 1 is shown. The embodiment is similar to the“step-right-in” variant of the first em bodiment as shown in Figs. 5a-5b.

As best seen in Fig. 12, in this third embodiment, the pissoir unit 1 comprises a bottom sub-assembly 6 having the stall bottoms 35, 45, 55, and a urine re- ception tank 1 10. The stall bottoms 35, 45, 55 is formed integrally in one piece with the urine reception tank 1 10 by rotation moulding. By providing a closed bottom sub-assembly 6 in this way a higher mechanical stability of the bottom sub-assembly 6 may be achieved in order to securely and rigidly support the weight of users.

The bottom sub-assembly 6 further comprises a flat bottom surface 61 by which the pissoir unit 1 may rest directly on a ground surface G. The flat bottom surface 61 is configured for supporting the weight of users of the pissoir unit and may provide the advantage that a greater surface area is provided, for instance so that the pissoir unit does not sink on potential wet ground. At each stall 30, 40, 50, the bottom sub-assembly 6 comprises a raised wall 37, 47, 57 configured for receiving and engaging with the recess R of the wall 10, so that the wall 10 may extend around the raised wall 37, 47, 57 when several sub-assemblies are in a stack.

The bottom sub-assembly 6 comprises an attachment device 62 positioned at the centre of the bottom sub-assembly 6 at the vertical axis X. The attachment device 62 is configured attaching and detaching the bottom sub-assembly 6 to the wall 10. The attachment device 62 comprises a top telescopic pipe 63 slid- ably housed in a bottom telescopic pipe 64. The attachment device 62 has an extended position as shown in Fig. 12 and a retracted position. In the extended position, pins 63a, 64a are inserted into aligned holes of the telescopic pipes 63, 64, to secure the attachment device 62 in the extended position and a wall 10 may be placed on top of the bottom sub-assembly 6 as shown in Fig. 1 1 a, wherein, as best seen in Fig. 13a, a plate of the lifting engagement structure 2 can rotably be secured to bolts of a flange of the top telescopic pipe 63 in the hollow space 20 so that the wall 10 can be secured to the bottom sub-assembly 6. By a lifting engagement structure 2 as shown in Fig. 13a may provide the advantage that walls 10 may still compactly be stacked on top of each other. In the retracted position as shown in Fig. 13b, another bottom sub-assembly 6 can be stacked on top of the bottom sub-assembly 6.

The urine reception tank 1 10 comprises an internal, substantially sealed vol- ume configured for storing urine. The bottom sub-assembly 6 comprises a valve 65 having an open state and a closed state and connectable to a tube and positioned in a bottom portion of internal volume to, in an open state, empty said volume of said urine reception tank 1 10 by gravity. This may pro- vide the advantage that any odour from the urine reception tank 1 10 can be prevented from leaking and thus may provide a better experience for users. The recess R and the hollow space 20 of the wall 10 is configured for receiving a free upper edge 12 of a subadjacent wall 10 thereby forming a stack of walls 10. This allows easier transportation of multiple walls 10 for providing multiple pissoir units 1.

The bottom sub-assembly 6 further comprises stall cut-outs 39, 49, 59 beneath each stall bottom 35, 45, 55. Each stall cut-outs 39, 49, 59 has a shape con- figured for accommodating and engaging subadjacent stall bottoms 35, 45, 55 or raised walls 37, 47, 57 of another pissoir unit 1 allowing the formation of a stack of pissoir units 1. This may provide the advantage that multiple bottom sub-assemblies 6 may be stacked on top of each other enabling easier logis- tics when transporting the pissoir units 1. Furthermore, a stack of walls may be stacked on top of a stack of bottom sub-assemblies thereby forming a single stack of multiple pissoir units 1 liftable by a single forklift. This allows easy deployment of multiple pissoir units.

Claims

1. A portable open top pissoir unit (1 ) including:

a wall (10) comprising sections (32, 42, 52) defining individual urinal stalls (30, 40, 50) and having two opposite skins (16, 18) defining a hollow space (20), the hollow space (20) communicating with a bottom recess (R) delimited by an outer skin (16) of the two opposite skins (16, 18), an inner skin (18) of the two opposite skins (16, 18) facing the stall (30, 40, 50) being integral with or being connected to a raised pissoir unit bottom (35, 45, 55) defining a stepping sur- face for a person using a stall (30, 40, 50) of the pissoir unit (1 ).

2. A portable open top pissoir unit (1 ) according to claim 1 , configured for being stackable and potentially formed as a molded unitary structure, comprising:

- at least two stalls (30, 40, 50) separated from each other by sections (32, 42, 52) of a wall (10),

- said sections (32, 42, 52) preferably extending outwardly from a vertical axis

(X),

- each stall (30, 40, 50) having a urinal (100) or being configured for mounting a urinal (100),

- a lower portion (7) of said wall (10) defining a downwardly open recess (R) and potentially having a lower edge (14), preferably by which the pissoir unit (1 ) may rest directly on a ground surface (G),

- potentially a top portion (5) of said wall (10) integrally molded with said lower portion (7) defining a free upper edge (12) of said pissoir unit (1 ),

- potentially said wall (10) tapering towards said free upper edge (12),

- potentially said wall (10) comprising a hollow structure defined by converging opposite inside and outside skins (16, 18),

- - said inside and outside skins (16, 18) being separated by a downwardly open hollow space (20) communicating with said recess (R),

- - potentially said outside skins (16) oriented towards the outside of the pissoir unit (1 ) and defining said lower portion (7) of said wall (10), - potentially said inside skins (18) oriented towards the inside of a respective stall (30, 40, 50), and

- a respective stall bottom (35, 45, 55) integral with or connected to said inside skins (18) providing a stepping surface, potentially above said recess (R), for a user of said pissoir unit (1 ).

3. A portable open top pissoir unit (1 ), configured for being stackable and formed as a molded unitary structure, comprising:

(X),

- a lower portion (7) of said wall (10) defining a downwardly open recess (R) and having a lower edge (14), preferably by which the pissoir unit (1 ) may rest directly on a ground surface (G),

- a top portion (5) of said wall (10) integrally molded with said lower portion (7) defining a free upper edge (12) of said pissoir unit (1 ),

- said wall (10) tapering towards said free upper edge (12),

- said wall (10) comprising a hollow structure defined by converging opposite inside and outside skins (16, 18),

- - said outside skins (16) oriented towards the outside of the pissoir unit (1 ) and defining said lower portion (7) of said wall (10),

- said inside skins (18) oriented towards the inside of a respective stall (30, 40, 50), and

- a respective stall bottom (35, 45, 55) integral with said inside skins (18) providing a stepping surface above said recess (R) for a user of said pissoir unit (1 ).

4. The pissoir unit (1 ) according to any of the previous claims, each stall in- cluding a urinal (100) receiving opening (38, 48, 58), preferably formed in said stall bottom (35, 45, 55) of some or all of said stalls (30, 40, 50) and/or defined by a raised wall (37, 47,57) integral with said stall bottom (35, 45, 55) and delimiting together with said inside skin a respective one of said openings (38, 48, 58).

5. The pissoir unit of claim 4, a urinal (100) for receiving urine being mounted or being mountable to each of said openings (38, 48, 58).

6. The pissoir unit (1 ) according to any of the previous claims, said wall sec- tions (32, 42, 52) being configured or arranged to reduce or eliminate direct visibility from the outside of the pissoir unit (1 ) of the side of a user using the urinal (100) and/or said skins (16, 18) having respective outer faces (17, 19) defining the surfaces of said pissoir unit (1 ) being visible in normal use of the pissoir unit (1 ).

7. The pissoir unit (1 ) according to any of the previous claims, said skins (16, 18) preferably being inclined to the vertical and preferably each having an es- sentially uniform thickness.

8. The pissoir unit (1 ) according to any of the previous claims, said sections (32, 42, 52) extending outwardly from a vertical axis (X), said vertical axis (X) passing through the centre of mass (M) of the pissoir unit (1 ).

9. The pissoir unit (1 ) according to any of the previous claims, the level of said stepping surface being at a height (h) above said lower peripheral edge (14) corresponding to between 15% and 40%, preferably between 20% and 30%, of the total height (H) of said pissoir unit (1 ).

10. The pissoir unit (1 ) according to any of the previous claims, including a lifting engagement structure (2) for moving the pissoir unit (1 ), said lifting struc- ture (2) preferably being positioned at said vertical axis (X).

1 1 . The pissoir unit (1 ) according to any of the previous claims, said lower portion (7) and/or said stall bottoms (35, 45, 55) having base portions (B) con- figured to be engageable for portability, such as by a fork lift (510), to allow for shifting of a stack of said pissoir units (1 ), or of a single pissoir unit (1 ), across a ground surface (G).

12. The pissoir unit (1 ) according to any of the previous claims, including a separate urine reception tank (1 10) received in said recess (R).

13. The pissoir unit (1 ) according to any of the previous claims, wherein a bot- tom sub-assembly (6) of the pissoir unit (1 ) potentially formed as a molded unitary structure, said bottom sub-assembly (6) comprising said stall bottoms (35, 45, 55), and a urine reception tank (1 10) with an internal volume config- ured for storing urine, said stall bottoms (35, 45, 55) being formed integrally, potentially in one piece, with said urine reception tank (1 10).

14. The pissoir unit (1 ) according to any of the previous claims, wherein said bottom sub-assembly (6) is received in said recess (R) and is, potentially detachably, attached to said wall (10).

15. The pissoir unit (1 ) according to any of the previous claims, wherein said bottom sub-assembly (6) comprises an attachment device (62) configured for attaching and/or detaching to the wall (10), potentially a lifting engagement structure (2) of the wall.

16. The pissoir unit (1 ) according to any of the previous claims, wherein said internal volume of said urine reception tank (1 10) is sealed and/or said urinal receiving openings (38, 48, 58) are in fluid communication with said urine re- ception tank (110) and/or said bottom sub-assembly (6) comprises a valve (65) connectable to a tube and positioned to, in an open state, empty said volume of said urine reception tank (110).

17. The pissoir unit (1 ) according to any of the previous claims, wherein said bottom sub-assembly (6) comprises a flat bottom surface (61 ) by which the pissoir unit (1 ) may rest directly on a ground surface (G).

18. The pissoir unit (1 ) according to any of the previous claims, wherein said sub-assembly (6) comprises stall cut-outs (39, 49, 59), potentially beneath each stall bottom (35, 45, 55), each having a shape configured for accommo- dating and engaging subadjacent stall bottoms (35, 45, 55) or raised wall (37, 47,57) of another pissoir unit (1 ) allowing the formation of a stack of pissoir units (1 ).