US3867485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Humidifier with automatic flushing
Assignee: Skuttle Manufacturing Co
•
Filing: 1972-07-26
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Granted: 1975-02-18
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Expires: 1992-07-26
Abstract
Abstract A humidifier reservoir is periodically flushed for predetermined periods under control of the humidistat that controls operation of the rotating evaporator drum or other water distribution device.
Inventors
- 👤 Richard J Yeagle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:06
CPC Classifications
F; F24; F24F; F24F6/00; F24F6/02; F24F6/06; Y; Y10; Y10S; Y10S261/00; Y10S261/46
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
118 words
A humidifier of the type having a water reservoir wherein the water level is maintained by automatic means and water from the reservoir is conveyed to water distribution means adapted to disperse water into air to be humidified, said water distribution means having an electrical actuating unit, a control circuit for said unit including a humidistat responsive to the air being humidified, normally closed drain means for said reservoir, and means controlled by said humidistat and operative only when said electrical actuating unit is inactive for opening said reservoir drain means for a predetermined short period to flush said reservoir and then automatically reclosing said drain means to permit said water level to be regained in the reservoir.
Claim 2
Dependent Claim
118 words
A humidifier of the type having a water reservoir wherein the water level is maintained by automatic means and water from the reservoir is conveyed to water distribution means adapted to disperse water into air to be humidified, said water distribution means having an electrical actuating unit, a control circuit for said unit including a humidistat responsive to the air being humidified, normally closed drain means for said reservoir, and means controlled by said humidistat and operative only when said electrical actuating unit is inactive for opening said reservoir drain means for a predetermined short period to flush said reservoir and then automatically reclosing said drain means to permit said water level to be regained in the reservoir.
Claim 3
Dependent Claim
39 words
The humidifier defined in claim 1, wherein said reservoir drain means is an outlet drain passage, and said means controlled by the humidistat comprises a normally closed valve disposed in said passage that is opened during said predetermined period.
Claim 4
Dependent Claim
36 words
In the humidifier defined in claim 2, said means controlled by the humidistat including a timing device operatively connected to said valve wherebY the valve remains open for only said predetermined period and is then reclosed.
Claim 5
Dependent Claim
38 words
The humidifier defined in claim 1, wherein said water distribution means is a rotating drum having a surface portion adapted to pick up water from said reservoir and said actuating unit is a motor for driving said rotor.
Claim 6
Dependent Claim
35 words
The humidifier defined in claim 4, wherein said reservoir has a drain outlet containing a normally closed solenoid valve, and said humidistat contains switching means adapted for selectively actuating either said motor or said valve.
Claim 7
Dependent Claim
20 words
The humidifier defined in claim 5, wherein a timing device is connected to control the opening period of said valve.
Claim 8
Dependent Claim
42 words
The humidifier defined in claim 6, wherein said timing device is disposed in circuit between the humidistat and said solenoid valve and includes heating means and an associated normally closed switch adapted to be opened after said heating means has been energized.
Claim 9
Dependent Claim
34 words
The humidifier defined in claim 1, wherein said humidistat comprises single pole double throw switch operatively connecting a power source either to said electrical actuating unit or to said drain opening and closing means.
Claim 10
Dependent Claim
35 words
The humidifier defined in claim 1, wherein said means for opening and reclosing said drain means is automatically actuated to flush the reservoir each time the humidistat operates to render said electrical actuating unit inactive.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |