US3670141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Humidifier
Assignee: Individual
•
Filing: 1971-04-15
•
Granted: 1972-06-13
•
Expires: 1991-04-15
Abstract
Abstract A boiler formed by a water containing vertically disposed casing having a heater in its depending end portion is provided with a steam outlet at its upper end portion. An overflow tube, connected with the depending end portion of the case, drains minerals and salts tending to accumulate in the bottom of the casing. A thermal switch secured to the depending end of the case operates a water flow controlling solenoid valve which refills the casing in response to temperature changes of the casing in converting water contained thereby to steam.
Inventors
- 👤 David R Dines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:17
CPC Classifications
F; F24; F24H; F24H1/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
133 words
A humidifier, comprising: a vertically disposed casing forming a primary water holding chamber, said casing having an opening adjacent its upper limit to permit steam to issue from the water holding chamber; heater means within the depending end portion of said casing; water supply means connected with the upper end portion of said casing; tube means connected with the depending end portion of said casing and forming a secondary water holding chamber limiting the quantity of water contained by said casing; thermal switch means connected with the wall of the depending end portion of said casing and operatively connected with said water supply means for refilling said casing at predetermined intervals; and, thermal conduction means interposed between said switch means and said casing wall for increasing the thermal inertia of said switch means.
Claim 2
Dependent Claim
133 words
A humidifier, comprising: a vertically disposed casing forming a primary water holding chamber, said casing having an opening adjacent its upper limit to permit steam to issue from the water holding chamber; heater means within the depending end portion of said casing; water supply means connected with the upper end portion of said casing; tube means connected with the depending end portion of said casing and forming a secondary water holding chamber limiting the quantity of water contained by said casing; thermal switch means connected with the wall of the depending end portion of said casing and operatively connected with said water supply means for refilling said casing at predetermined intervals; and, thermal conduction means interposed between said switch means and said casing wall for increasing the thermal inertia of said switch means.
Claim 3
Dependent Claim
39 words
The humidifier according to claim 1 in which said heater means comprises: a downwardly open housing coaxially received in close spaced relation within the depending end portion of said casing; and, an electrical resistance heating element within said housing.
Claim 4
Dependent Claim
46 words
The humidifier according to claim 2 in which said water supply means includes: a water supply pipe; a solenoid valve interposed in said water supply pipe; and, wiring connecting a source of electrical energy with said heating element, said solenoid valve and said thermal switch means.
Claim 5
Dependent Claim
62 words
The humidifier according to claim 3 in which said tube means comprises: a first tube substantially defining a U-shape and having an upwardly open leg portion extending upwardly substantially coextensive with said casing; and, a second tube horizontally connected, at one end, with said first tube above the upper limit of said housing, the other end of said second tube projecting downwardly.
Claim 6
Dependent Claim
33 words
The humidifier according to claim 4 and further including: normally open float valve and cage means coaxially connected with the upper end portion of said casing and said first tube leg portion, respectively.
References Cited (Backward Citations)
US1580293A
Cited
US3219796A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |