Beds – Waterbed or associated device – Having plural – distinct removable bladders
Patent
1995-06-12
1997-07-15
Trettel, Michael F.
Beds
Waterbed or associated device
Having plural, distinct removable bladders
5682, 5422, A47C 2710
Patent
active
056470770
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a water mattress apparatus having a water bag containing a liquid therein and a water bag for use in the water mattress apparatus.
BACKGROUND ART
There are various types of known mattress apparatuses. Of these, a water mattress apparatus is known. The water mattress apparatus has a water bag containing a liquid therein and, on load, the liquid contained in the water bag is displaced along the uneven contour of the body of a user on the water mattress apparatus in a supine position. Since, in this case, there occurs no reaction force which may be produced from the strength corresponding to that amount of compression, such as that of a mattress apparatus composed of a spring unit, no great compression force acts upon any heavy body portion of the user, such as the buttocks.
Unless the user is forced to have his or her body partially and strongly compressed, such a mattress apparatus can be used for, for example, an ill or elderly person confined to bed over a long period of time, thus preventing any bed sores upon him or her. In recent years, the water mattress apparatus has been extensively utilized in view of its advantage to which attention is paid.
The water mattress apparatus described above, usually, has a case with a water bag held in its receiving section. The case with the water bag so held is covered with an outer cover unit comprised of a cloth sewed into a bag-like unit.
The liquid contained in the water bag is non-compressive in nature during moving in a deformed water bag on application of load. For this reason, the water mattress apparatus with the water bag held in the case imparts no cushioning action resulting from a varying elastic compression to the user on load, thus failing to give any comfortable cushioning action to the user as is obtained from the spring mattress.
The liquid contained in the water bag has its temperature lowered considerably in the winter season. To this end, a heater is arranged in the case for holding the water bag and the liquid in the water bag is warmed by the heater to a temperature at which the mattress apparatus is comfortable to sleep on.
It is said that about 33.degree..+-.1.degree. C. is usually a temperature at which the user can comfortably sleep on the mattress apparatus. It is also said that the user can readily fall asleep at a temperature about 3.degree. C. higher at his or her feet than at the remaining portions of the body. There are sometimes the case where, since, in particular, a person unduly sensitive to cold is usually about 3.degree. C. lower at his or her feet than at the remaining body portions, he or she cannot enjoy a comfortable sleep unless the feet are more warmed than the rest of his or her body.
The water bag is formed of an elastic, water-proof sheet-like material, such as rubber or vinyl. When the water bag is pierced by something sharp, abruptly impacted or damaged due to degeneration over prolonged use, etc., the liquid sometimes leaks from the water bag into the receiving section of the case.
In order to prevent the liquid which flows out of the water bag from leaking outside via the receiving section of the case, a water-proof bottom sheet is usually laid on the receiving section of the case. Simply laying such a bottom sheet on the receiving section sometimes may cause the liquid which leaks via the receiving section to be absorbed by the outer cover unit so that it oozes out of the outer cover unit.
From this view point, it has been considered to cover the top-opened side of the receiving section with a water-proof upper sheet. If, therefore, the top-opened side of the receiving section is so covered with the upper sheet, it is possible to prevent the liquid which leaks via the receiving section from being absorbed.
There is, however, a possibility that, if such an upper sheet is provided between the case and the outer cover unit, the sweat from the user on the outer cover unit in a supine position as well as a moisture content from an outer atmosphere will be accumulated
REFERENCES:
patent: 4141770 (1979-02-01), Mollura
patent: 4208748 (1980-06-01), Lobach
patent: 4221013 (1980-09-01), Echevarria
patent: 4280235 (1981-07-01), Kowal
patent: 4602396 (1986-07-01), Fraige
patent: 4737998 (1988-04-01), Johnson, Sr.
patent: 4798936 (1989-01-01), Johnson, Sr.
patent: 4912789 (1990-04-01), Maxwell
patent: 5490295 (1996-02-01), Boyd
patent: 5513401 (1996-05-01), Abe et al.
Abe Takeo
Kawamura Shoji
France Bed Co. Ltd.
Trettel Michael F.
LandOfFree
Water mattress apparatus and a water bag used for the water matt does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Water mattress apparatus and a water bag used for the water matt, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Water mattress apparatus and a water bag used for the water matt will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1483837