US3564201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compact sauna unit
Assignee: VIKING SAUNA Co
•
Filing: 1969-02-04
•
Granted: 1971-02-16
•
Expires: 1989-02-04
Abstract
Abstract A compact sauna unit, capable of use by one person alone is provided as a self-contained room having its own floor, ceiling, walls, and door, assembled reasonably snugly while enabling a small amount of leakage of air from outside into the room at the joints between parts and around the door. In the room is a seat to hold a person with his feet spaced well above the floor. A heater unit is contained in the door and comprises a housing defining a plurality of generally vertically extending ducts with air inlets at the lower end and air outlets at the upper end. One duct is an inner duct adjacent the inner surface of the door for keeping the inner surface of the housing cool; an outer duct lies adjacent the outer surface of the door for keeping that outer surface cool; and a central duct is sandwiched between the inner and outer ducts and separated from them by thin metal walls. Electrical rod heating means in said central duct supplies heat; in fact, the sole source of heating for the sauna unit, also serving to provide heat to the inner and outer ducts through the thin metal duct walls, for causing upward movement of cooling air therethrough. There is an air exhaust conduit through the door, vertically above the heater unit, for exhausting a controlled amount of air from the room. Typically, the door has a window spaced above the heater unit, and the exhaust conduit is provided along the upper edge of the window, comprising a horizontal conduit between a vertical inlet passage leading down from an inlet above the horizontal conduit and a vertical outlet passage leading up to an outlet above the horizontal conduit. The vertical inlet and outlet passages are located high, above eye level of tall persons when standing inside or outside the room, and are shielded from view by vertical fascias so as to be not readily observable except from above them.
Inventors
- 👤 Robert Haldon Jones
- 👤 Lennard Edward Nylin
- 👤 Tor H Olssen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:53
CPC Classifications
A; A61; A61H; A61H33/00; A61H33/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
383 words
A heater unit for use in a flat rectangular recess lying on one side of an imperforate door of a sauna room, comprising: a flat rectangular sheet metal housing for substantially filling said recess, said housing having: an imperforate rear plate lying in a single plane for flush contact with the door at the full depth of said recess; a front plate lying in a single plane parallel to that of said rear plate and having upper and lower perforate portions and a central imperforate portion; top, bottom, and sidewalls, all imperforate and all perpendicular to and joining said front and rear plates and shallow in comparison to them; forward and rear interior sheet metal partitions in between said front plate and said rear plate defining a plurality of generally vertically extending duct means, said forward partition lying in a single plane parallel to said front plate, said rear partition having a lower horizontal portion parallel to said bottom wall, a main portion parallel to said rear plate, and an upper inclined portion; said lower perforate portion of said front plate providing air inlet means at the lower end of said housing; said upper perforate portion of said front plate providing air outlet means at the upper end of said housing; both said air inlet means and said air outlet means lying on the same face of said housing so that both can open into the interior of said room; said duct means providing a flat inner duct adapted to lie adjacent the inner surface of the door for keeping said rear plate cool, an outer duct adapted to lie adjacent the outer surface of the door for keeping said front plate cool, and a central duct sandwiched between said inner and outer ducts and separated therefrom by the thin metal walls of said partitions; said heater unit having electrical rod heating means in said central duct lying in a single plane parallel to said front and rear plates and extending substantially the full height of the vertical portions of said partitions; and the heat thereof serving to supply the sole source of heating for the sauna room and also serving to provide heat to said inner and outer ducts through said thin metal walls for causing upward movement of cooling air therethrough.
Claim 2
Dependent Claim
383 words
A heater unit for use in a flat rectangular recess lying on one side of an imperforate door of a sauna room, comprising: a flat rectangular sheet metal housing for substantially filling said recess, said housing having: an imperforate rear plate lying in a single plane for flush contact with the door at the full depth of said recess; a front plate lying in a single plane parallel to that of said rear plate and having upper and lower perforate portions and a central imperforate portion; top, bottom, and sidewalls, all imperforate and all perpendicular to and joining said front and rear plates and shallow in comparison to them; forward and rear interior sheet metal partitions in between said front plate and said rear plate defining a plurality of generally vertically extending duct means, said forward partition lying in a single plane parallel to said front plate, said rear partition having a lower horizontal portion parallel to said bottom wall, a main portion parallel to said rear plate, and an upper inclined portion; said lower perforate portion of said front plate providing air inlet means at the lower end of said housing; said upper perforate portion of said front plate providing air outlet means at the upper end of said housing; both said air inlet means and said air outlet means lying on the same face of said housing so that both can open into the interior of said room; said duct means providing a flat inner duct adapted to lie adjacent the inner surface of the door for keeping said rear plate cool, an outer duct adapted to lie adjacent the outer surface of the door for keeping said front plate cool, and a central duct sandwiched between said inner and outer ducts and separated therefrom by the thin metal walls of said partitions; said heater unit having electrical rod heating means in said central duct lying in a single plane parallel to said front and rear plates and extending substantially the full height of the vertical portions of said partitions; and the heat thereof serving to supply the sole source of heating for the sauna room and also serving to provide heat to said inner and outer ducts through said thin metal walls for causing upward movement of cooling air therethrough.
Claim 3
Dependent Claim
345 words
A door for a sauna unit including in combination: a door member having an inner surface and an outer surface and having a flat rectangular recess in said inner surface, there being no opening through said door at said recess; a heater unit contained substantially in said recess and comprising: a flat rectangular sheet metal housing substantially filling said recess and having an imperforate planar rear plate in flush contact with the door at the back of said recess, a front planar plate parallel to said rear plate and having upper and lower perforate portions and a central imperforate portion, and shallow imperforate top, bottom, and sidewalls perpendicular to and joining said front and rear plates; forward and rear interior sheet metal partitions in between said front and rear plates, said forward partition being planar and parallel to said front plate and said rear partition having a major planar portion parallel to said rear plate, said housing and said partitions defining a plurality of generally vertically extending duct means; said lower perforate portion of said front plate providing air inlet means at the lower end of said housing and said upper perforate portion providing an outlet means at the upper end thereof, said duct means providing a flat inner duct adjacent said rear plate for keeping said rear plate cool, a flat outer duct adjacent said front plate for keeping said front plate cool, and a central duct sandwiched between said inner and outer ducts and separated therefrom by the thin metal walls of said partitions; electrical rod heating means lying in a flat plane in said central duct parallel to said partitions, the heat therefrom serving to supply the sole source of heating for the sauna unit and also serving to provide heat to said inner and outer ducts through said thin metal walls of said partitions for causing upward movement of cooling air therethrough; and exhaust means through said door vertically above said recess and said heater unit for exhausting a controlled amount of air from said room, said door being otherwise imperforate.
Claim 4
Dependent Claim
345 words
A door for a sauna unit including in combination: a door member having an inner surface and an outer surface and having a flat rectangular recess in said inner surface, there being no opening through said door at said recess; a heater unit contained substantially in said recess and comprising: a flat rectangular sheet metal housing substantially filling said recess and having an imperforate planar rear plate in flush contact with the door at the back of said recess, a front planar plate parallel to said rear plate and having upper and lower perforate portions and a central imperforate portion, and shallow imperforate top, bottom, and sidewalls perpendicular to and joining said front and rear plates; forward and rear interior sheet metal partitions in between said front and rear plates, said forward partition being planar and parallel to said front plate and said rear partition having a major planar portion parallel to said rear plate, said housing and said partitions defining a plurality of generally vertically extending duct means; said lower perforate portion of said front plate providing air inlet means at the lower end of said housing and said upper perforate portion providing an outlet means at the upper end thereof, said duct means providing a flat inner duct adjacent said rear plate for keeping said rear plate cool, a flat outer duct adjacent said front plate for keeping said front plate cool, and a central duct sandwiched between said inner and outer ducts and separated therefrom by the thin metal walls of said partitions; electrical rod heating means lying in a flat plane in said central duct parallel to said partitions, the heat therefrom serving to supply the sole source of heating for the sauna unit and also serving to provide heat to said inner and outer ducts through said thin metal walls of said partitions for causing upward movement of cooling air therethrough; and exhaust means through said door vertically above said recess and said heater unit for exhausting a controlled amount of air from said room, said door being otherwise imperforate.
Claim 5
Dependent Claim
60 words
The sauna unit of claim 2 wherein said door has a window spaced above said heater unit, said exhaust means being provided along the upper edge of said window and comprising a horizontal conduit between a vertical inlet passage leading from an inlet above said horizontal conduit and a vertical outlet passage leading to an outlet above said horizontal conduit.
Claim 6
Dependent Claim
46 words
The sauna unit of claim 3 wherein said vertical inlet and outlet passages are located high, above eye level of tall persons when standing inside or outside said room, and are covered by vertical fascias so as to be not readily observable except from above them.
References Cited (Backward Citations)
US144413A
Cited
US1651890A
Cited
GB264296A
Cited
US1801099A
Cited
GB318291A
Cited
US1976032A
Cited
FR1073948A
Cited
US3394412A
Cited
US3452369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |