US3780397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wet/dry suction cleaner
Assignee: Singer Co
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Filing: 1973-01-03
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Granted: 1973-12-25
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Expires: 1993-01-03
Abstract
Abstract A wet/dry suction cleaner having a dirt storage receptacle and a power suction module mounted thereon. The module includes a lower housing, a separator housing and a top cover. A by-pass motorblower unit is mounted between the two housings and an air shutoff valve assembly depends downwardly from the lower housing into the receptacle. The separator housing includes downwardly depending annular walls which separate the blower working airflow from the motor cooling airflow and has an exhaust port which communicates with the blower airstream. Motor cooling air enters inlet slots in the separator housing and is baffled by a labyrinth of vertical walls formed by the top cover and separator housing. The air then flows between the top and the separator floor and enters the motor through an opening in the separator. The cooling air exits the motor to a cooling air exhaust chamber formed by the annular walls of the separator housing, exhausts therefrom between the cover and separator housings, and is baffled before exiting by a labyrinth similar to that at its entry.
Inventors
- 👤 M Harbeck
- 👤 R Lagerstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:13
CPC Classifications
A; A47; A47L; A47L7/00; A47L7/0004; A47L7/0023; A47L7/0028; A47L5/00; A47L5/12; A47L7/0042
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
329 words
A power suction module adapted for use with an open top storage receptacle having an air inlet for drawing wet and dry dirt laden air therethrough, said module comprising a substantially cup shaped lower housing having an air inlet supporting a by-pass motor-blower unit with the blower intake in flow communication with said inlet, the motor of said unit positioned above the blower and being cooled by an airstream separate from the blower working airstream, a separator housing having inner and outer downwardly extending annular walls positioned on the motor-blower unit, the outer wall forming with the lower housing a blOwer working airstream exhaust chamber for receiving working air exhausted from the blower, means defining an exhaust port in said separator housing communicating with said blower exhaust chamber, the inner and outer walls forming therebetween a motor cooling air exhaust chamber for receiving cooling air which has passed through the motor, means defining a cooling air inlet aperture in said inner wall, means defining a cooling air exhaust aperture communicating with said cooling air exhaust chamber, said separator housing including inlet baffles and exhaust baffles, each of said baffles comprising at least an inner and outer upstanding wall and a peripheral rim spaced above the lower housing, means defining cooling air inlet and cooling air exhaust slots intermediate a respective outer upstanding annular wall and peripheral rim, a cover positioned on said separator housing including a peripheral rim engaging said separator housing outwardly of each of said inlet and exhaust slots and being spaced from said separator housing to define a cooling air inlet path from said cooling air inlet slots to said motor cooling air inlet aperture, and a cooling air exhaust path from said cooling air exhaust aperture to said exhaust slots, and a downwardly extending annular wall formed on said cover intermediate the upstanding annular walls of each said baffle, each last named wall terminating below the elevation of the tops of respective upstanding annular walls.
Claim 2
Dependent Claim
329 words
A power suction module adapted for use with an open top storage receptacle having an air inlet for drawing wet and dry dirt laden air therethrough, said module comprising a substantially cup shaped lower housing having an air inlet supporting a by-pass motor-blower unit with the blower intake in flow communication with said inlet, the motor of said unit positioned above the blower and being cooled by an airstream separate from the blower working airstream, a separator housing having inner and outer downwardly extending annular walls positioned on the motor-blower unit, the outer wall forming with the lower housing a blOwer working airstream exhaust chamber for receiving working air exhausted from the blower, means defining an exhaust port in said separator housing communicating with said blower exhaust chamber, the inner and outer walls forming therebetween a motor cooling air exhaust chamber for receiving cooling air which has passed through the motor, means defining a cooling air inlet aperture in said inner wall, means defining a cooling air exhaust aperture communicating with said cooling air exhaust chamber, said separator housing including inlet baffles and exhaust baffles, each of said baffles comprising at least an inner and outer upstanding wall and a peripheral rim spaced above the lower housing, means defining cooling air inlet and cooling air exhaust slots intermediate a respective outer upstanding annular wall and peripheral rim, a cover positioned on said separator housing including a peripheral rim engaging said separator housing outwardly of each of said inlet and exhaust slots and being spaced from said separator housing to define a cooling air inlet path from said cooling air inlet slots to said motor cooling air inlet aperture, and a cooling air exhaust path from said cooling air exhaust aperture to said exhaust slots, and a downwardly extending annular wall formed on said cover intermediate the upstanding annular walls of each said baffle, each last named wall terminating below the elevation of the tops of respective upstanding annular walls.
Claim 3
Dependent Claim
24 words
A power suction module as recited in claim 1 wherein said cooling air inlet and exhaust slots are disposed in a substantially horizontal plane.
Claim 4
Dependent Claim
74 words
A power suction module as recited in claim 1 wherein the upstanding walls of said inlet baffles, said inlet slots and said cooling air inlet aperture are substantially within the sector of a circle on one side of said separator housing, and the upstanding walls of said exhaust baffles, said exhaust slots and said cooling air exhaust aperture are substantially within the sector of a circle on the opposite side of said separator housing.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |