Patent US4699737A successfully refreshed from Google Patents.
US4699737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable humidifier
Assignee: Individual
•
Filing: 1986-07-09
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Granted: 1987-10-13
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Expires: 2006-07-09
Abstract
Abstract A portable humidifier for insertion into a receptacle for water, including an outer housing which has outlet openings formed therein, a support structure for holding the housing in depending relation within the liquid receptacle, and a driven fan positioned in the housing and arranged to draw moisture-laden air up through the housing and out the outlet passages. An inner housing is slidably received within the outer housing in telescoping relation. A secondary, non-driven fan is positioned within the inner housing for rotation therein and is arranged to disperse water droplets into the airflow created by operation of the driven fan. An air inlet means is arranged to direct air through the inner housing to be propelled with the water droplets upwardly into the outer housing for discharge through the outlet openings. The device is foldable to a compact structure making it convenient to be carried in a suitcase or the like.
Inventors
- 👤 Bradley W. Engstrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:47
CPC Classifications
F; F24; F24F; F24F6/00; F24F6/12; F24F6/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
148 words
A portable humidifier comprising: an outer housing having outlet openings formed therein, support means extending radially outwardly from said housing and arranged to dependently support said housing within a liquid receptacle, a driven fan positioned in said housing and arranged to draw moisture-laden air up through said housing and out said outlet openings, an inner housing slidably received within said outer housing in telescoping relation without relative rotative movement therebetween, a flotation collar on said inner housing supporting said inner housing for flotation on a body of liquid contained in said liquid receptacle, a secondary, non-driven fan positioned within said inner housing for rotation therein and arranged to disperse water droplets into the airflow passing thereby, and air inlet means arranged to direct air radially inwardly through said inner housing to be propelled with said water droplets upwardly into said outer housing for discharge through said outlet openings.
Claim 2
Dependent Claim
148 words
A portable humidifier comprising: an outer housing having outlet openings formed therein, support means extending radially outwardly from said housing and arranged to dependently support said housing within a liquid receptacle, a driven fan positioned in said housing and arranged to draw moisture-laden air up through said housing and out said outlet openings, an inner housing slidably received within said outer housing in telescoping relation without relative rotative movement therebetween, a flotation collar on said inner housing supporting said inner housing for flotation on a body of liquid contained in said liquid receptacle, a secondary, non-driven fan positioned within said inner housing for rotation therein and arranged to disperse water droplets into the airflow passing thereby, and air inlet means arranged to direct air radially inwardly through said inner housing to be propelled with said water droplets upwardly into said outer housing for discharge through said outlet openings.
Claim 3
Dependent Claim
25 words
A portable humidifier according to claim 1 which includes adjustment means cooperating with said air inlet means to control the amount of air entering therethrough.
Claim 4
Dependent Claim
22 words
A portable humidifier according to claim 1 including: a motor carried by said outer housing and drivingly connected to said driven fan.
Claim 5
Dependent Claim
36 words
A portable humidifier according to claim 1 wherein said secondary non-driven fan includes fan blades, a shaft supporting said fan blades for rotation, and bearing means receiving the lower end of said shaft in bearing relation.
Claim 6
Dependent Claim
34 words
A portable humidifier according to claim 4 which includes: an internally ribbed open cone secured to said shaft to assist in atomizing water droplets into the airstream being drawn up by said driven fan.
Claim 7
Dependent Claim
16 words
A portable humidifier according to claim 4 wherein said bearing means is a needle point bearing.
Claim 8
Dependent Claim
20 words
A portable humidifier according to claim 4 wherein said shaft is coaxial with the vertical axis of said outer housing.
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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) | 1990-10-12 | 1991-04-13 | 1991-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-12 | 1995-04-13 | 1995-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-12 | 1999-04-13 | 1999-10-13 | $7700.00 | Window Closed / Lapsed |