EP0000436A1 - Lavatory seat - Google Patents

Lavatory seat Download PDF

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Publication number
EP0000436A1
EP0000436A1 EP78300124A EP78300124A EP0000436A1 EP 0000436 A1 EP0000436 A1 EP 0000436A1 EP 78300124 A EP78300124 A EP 78300124A EP 78300124 A EP78300124 A EP 78300124A EP 0000436 A1 EP0000436 A1 EP 0000436A1
Authority
EP
European Patent Office
Prior art keywords
seat
disinfectant
plastics
liquid
lavatory
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP78300124A
Other languages
German (de)
English (en)
French (fr)
Inventor
Ronald Mcnally
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0000436A1 publication Critical patent/EP0000436A1/en
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K13/00—Seats or covers for all kinds of closets
    • A47K13/24—Parts or details not covered in, or of interest apart from, groups A47K13/02 - A47K13/22, e.g. devices imparting a swinging or vibrating motion to the seats
    • A47K13/30—Seats having provisions for heating, deodorising or the like, e.g. ventilating, noise-damping or cleaning devices
    • A47K13/302—Seats with cleaning devices

Definitions

  • the invention relates to a lavatory seat.
  • a lavatory seat is known in which vapour of a disinfectant add/or deodorant is supplied to a surface of the seat through pores through the thickness of the material of the seat, (United Kingdom Patent No. 1 340 075).
  • the pores extend between the surface and a hollow interior of the seat in which liquid disinfectant and/or deodorant is housed.
  • this seat is hygienic on its upper surface there is sometimes not such a good bactericidal action in the underside of the seat and it is on the underside that there is sometimes spread of infection by splashing from a lavatory bowl to which the seat is affixed.
  • the invention as claimed is intended to provide a remedy. It solves the problem of how to provide a lavatory seat in which bacteria are substantially eliminated, thereby providing a seat which is hygenic over all its surfaces.
  • the seat being formed of plastics material which is permeable to liquid disinfectant, can absorb disinfectant so that the whole seat is substantially bacteria free, while maintaining body supporting surfaces of the seat "dry".
  • the plastics is coherent, not having pores, and is easily manufactured as by moulding and provision for providing pores does not have to be made.
  • the material which may comprise a body supporting surface of the seat and a boundary surface for part of the cavity, may be a plastics material.
  • the plastics may comprise perspex, polypropylene, acrylonitrile butadiene styrene (ABS), polyvinyl chloride or polyethylene.
  • the whole seat may comprise the plastics.
  • the whole seat is made of plastics, it may be formed by blow moulding, in for example a one-shot moulding process.
  • the seat may include means for charging the cavity with disinfectant and/or deoderant.
  • the charging means may comprise a removable filler cap.
  • the filler cap may be transparent and may be so arranged that there is in use an air gap between its lower surface and the upper level of liquid in the (horizontal) seat.
  • the air gap ensures that when the seat is raised and lowered, the (liquid) disinfectant and/or deodorant, in liquid form, flows around the cavity which ensures a good mixing of the liquid, while the transparent nature of the cap allows the colour of the liquid to be monitored. This is to enable the state of the disinfectant to be controlled, because it changes colour as it becomes spent.
  • the Figures show a lavatory seat 1 which has a liquid disinfectant distributing device in the form of an internal cavity 2 which extends throughout the whole seat.
  • the cavity 2 is for containing liquid disinfectant 2 ( Figure 3) (though liquid deodorant could be used alternatively or in addition).
  • the cavity 2 is wide but not deep and is made integrally with the seat 1 when that seat is made by blow moulding polyvinyl chloride.
  • the polyvinyl chloride is permeable to the disinfectant 3.
  • the cavity 2 is filled through chdrging means in the form of a filler cap 4.
  • the cap 4 is transparent and is so constructed and arranged that there is an air gap 5 between it and the inner surface 6 of the upper boundary of the cavity 2.
  • the cavity 2 is filled with water through the charging opening when the cap 4 is removed.
  • Disinfectant in liquid capsule, tablet, powder or paste form is then added to the water and disperses or dissolves in it.
  • the cap is placed in position in the seat.
  • the liquid disinfectant flows round the cavity and is thoroughly mixed and also thoroughly contacts the material of the seat. This movement is provided for by the air gap 5, into and out of which the liquid can flow.
  • the disinfectant slowly permeates through the material of the seat, so disinfecting all its surfaces and rendering them hygienic, but it does not "wet" the seat which is therefore comfortable to use.
  • the rate of penetration depends on the thickness of the plastics used. It will also be understood that the water is a carrier for the disinfectant which it brings into intimate contact with the seat and enhances its penetration therethrough.
  • the disinfectant has a particular colour. As it becomes spent, its colour changes. This change can be observed through the transparent cap 4 and, when required, more disinfectant, paste or the like can be added to re-charge disinfectant to restore it to its correct strength.
  • the seat can be made in other ways, for example by moulding, injection moulding, rotational moulding, a plastics spinning operation or in any other suitable way such as cellular blow moulding of a suitable expandible plastics.
  • the body of the seat would comprise a thin skin backed by a porous or foam structure, but there would be no pores extending through the skin. The open pore structure would facilitate the diffusion of the disinfectant.
  • the disinfectant may be a phenolic disinfectant such as:-
  • the phenolic system contains 50% phenols solubilised by vegetable soap.
  • the disinfectant may be a cationic disinfectant such as chlorhexidine gluconate (1:6 -di -CN -4 -chlorophenyl -di -guanido) -hexane digluconate).
  • Chlorhexidine gluconate is totally miscible with water and Sudol is formulated in a vehicle which allows ready dilution with water.
  • Chlorocresol and chloroxylenol are both sparingly soluble in water (0.4% and 0.03% respectively) and can be dissolved in aqueous polyethylene glycol (PEG 400) to form cosolvent mixtures.
  • PEG 400 is an acceptable cosolvent for external medicinal use as on a lavatory seat.
  • Plastics material which can be used are, in addition to the unplasticised PVC mentioned, filled acrylonitrite butadiene styrene (ABS), cellulose -acetate butyrate (CAB), polypropylene and polyurethane. I have found that the permeation rate of chlorocresol through CAB is ten times greater than through polypropylene, while still maintaining the plastics in a "dry" state, that is to say the plastics was not uncomfortable to use.
  • the plastics is polypropylene. Discs of 2.5 cm diameter were cut out and equilibrated with the disinfectant chlorocresol.
  • Inoculated discs were stored at 20°C in glass vessels adjusted to a range of humidities by the use of saturated salt solutions. After various time intervals discs were removed and washed in salt solution. The number of viable bacteria in the suspensions obtained was assessed by serial dilution and plating on nutrient agar. Survival, expressed as a fraction of the number inoculated, was calculated by counting the colonies formed after 48 hours at 3 7 ° C .
  • the lavatory seat illustrated in the drawings and above described can be modified in various ways.
  • the cavity 2 may not be necessary if a suitable polar polymer such as nylon were used because the cellular structure provides the route for the transport of the disinfectant to the surface of the seat.
  • the skin or surface layer could be of a different material to the (foamed) core.
  • the seat is of foamed plastics without a cavity 2, there may be a feed channel for distribution liquid disinfectant throughout the seat. If the channel is a surface groove, a permeable or microporous sheath may be insertable over the seat to cover the groove and through which the disinfectant can pass.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Toilet Supplies (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
EP78300124A 1977-07-06 1978-07-06 Lavatory seat Withdrawn EP0000436A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2820177 1977-07-06
GB2820177 1977-07-06

Publications (1)

Publication Number Publication Date
EP0000436A1 true EP0000436A1 (en) 1979-01-24

Family

ID=10271908

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78300124A Withdrawn EP0000436A1 (en) 1977-07-06 1978-07-06 Lavatory seat

Country Status (7)

Country Link
US (1) US4193144A (no)
EP (1) EP0000436A1 (no)
AU (1) AU3774178A (no)
DK (1) DK305878A (no)
ES (1) ES244781Y (no)
IT (1) IT1105238B (no)
NO (1) NO782309L (no)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4790039A (en) * 1987-11-09 1988-12-13 W. W. Scarborough Technique for sanitizing toilet seats
US4970730A (en) * 1989-08-07 1990-11-20 Stain Emma R Toilet seat repair organization
NO180617C (no) * 1992-06-02 1997-05-28 Hygoform As Kjerneelement for å bære en rull av oppviklet banemateriale
US8079094B2 (en) * 2005-01-07 2011-12-20 Dipano Jeffrey D Public restroom toilet seat sanitizing apparatus
US20100313341A1 (en) * 2009-06-12 2010-12-16 Keith Edgar Jordan Illuminating toilet/toilet seat

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69827C (de) * F. ROSE in Hamburg, Holstenplatz 3 Se/bstciesinficirender Einsäte für Abortsitze
GB331157A (en) * 1929-10-14 1930-06-26 Frank Salusbury Clifford Antiseptic fittings

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US866400A (en) * 1906-11-30 1907-09-17 Michael Sabel Apparatus for deodorizing closets.
US919512A (en) * 1908-08-21 1909-04-27 Harry Wilbur Young Sanitary commode-seat.
US1492825A (en) * 1922-05-23 1924-05-06 Charles P Abbott Sanitary seat for closets
US2033663A (en) * 1935-09-09 1936-03-10 Anthony J Landvogh Toilet seat
DE1043969B (de) * 1957-07-04 1958-11-13 Rene Meier Vorrichtung zur Geruchsbeseitigung in einem Klosettbecken
US2961664A (en) * 1959-08-06 1960-11-29 Bruno F Haerich Toilet seat
US3249951A (en) * 1963-07-24 1966-05-10 John L Thompson Toilet bowl deodorizer
GB1340075A (en) * 1970-01-14 1973-12-05 Mcnally R Lavatory seat
NO133646C (no) * 1971-03-26 1976-06-09 Ronald Mcnally

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69827C (de) * F. ROSE in Hamburg, Holstenplatz 3 Se/bstciesinficirender Einsäte für Abortsitze
GB331157A (en) * 1929-10-14 1930-06-26 Frank Salusbury Clifford Antiseptic fittings

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HUGO W.B.(ED.)"Inhibition and destruction of the microbial cell", 1971, Academic Press, London Pages 95-96, 549, 438-439. *

Also Published As

Publication number Publication date
US4193144A (en) 1980-03-18
ES244781Y (es) 1980-08-16
DK305878A (da) 1979-01-07
IT7850179A0 (it) 1978-07-05
IT1105238B (it) 1985-10-28
NO782309L (no) 1979-01-09
AU3774178A (en) 1980-01-10
ES244781U (es) 1980-03-01

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19810216