Tub apparatus
US4981543A · kind A · utility
35Cited by
5References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 1, 1989 |
| Grant date | Jan 1, 1991 |
| Priority date | — |
| Expiry date | May 1, 2009 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61H2201/0271
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Tub apparatus includes a foamed resiliently compressible plastic tub wall having an inner side and an outer side, the tub having an interior to receive liquid; a tensile liner adjacent the wall side, the liner and characterized in that it resists outward expansion in response to loading exerted by liquid filled into the tub interior; and including ports extending through the side wall and liner for circulating liquid between the interior of the tub and the exterior thereof. The plastic wall is typically locally heat cored in situ and provided with elbow fittings having venturis for efficient water, and water and air flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.