US3909219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaner filter assembly
Assignee: SINGER ACQUISITION HOLDINGS COMPANY 8 STAMFORD FORUM STAMFORD CT 06904 A DE CORP
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Filing: 1973-01-03
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Granted: 1975-09-30
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Expires: 1993-01-03
Abstract
Abstract A filter assembly for utility type vertical axis vacuum cleaner comprising three separate members- a substantially cup-like fabric filter including a resilient upper peripheral edge, a rigid hoop about which the upper edge of the filter is fitted, a polyvinylchloride seal fitted about the upper rim of the hoop. Also disclosed is a wet/dry utility vacuum cleaner having an open top dirt receptacle and a power suction module including a housing supporting a motor-blower unit in the receptacle and having a liquid sensing air shut-off device depending from the housing. An embodiment of the filter assembly is mounted in the receptacle with the seal interposed between mating peripheral edges of the receptacle and the housing, and includes a hole in the bottom of the filter through which the sensing element protrudes.
Inventors
- 👤 Charles Thomas Fromknecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:50
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/12; A47L9/127; A47L7/00; A47L7/0004; A47L7/0023; A47L7/0028; A47L7/0042; A47L9/19; B; B01; B01D; B01D46/00; B01D46/02; Y; Y10; Y10S; Y10S55/00; Y10S55/02; Y10S55/03
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
163 words
In a wet/dry suction cleaner having an open top dirt receptacle with a top periphery including an air inlet below the top periphery, a power suction module including a housing supporting a motor-blower unit supported on the top periphery of the receptacle with the motor blower unit mounted entirely within the receptacle for drawing wet and dry dirt laden air through the inlet, and air shut-off means including a liquid level sensor secured to the housing and depending into said receptacle, a filter assembly including a fabric filter disposed entirely within said receptacle between the air inlet and the intake to the motor-blower unit, said filter assembly having an annular seal interposed in abutting sandwiched relationship between the top of the receptacle and the module housing, means defining an aperTure in said fabric filter through which said sensor protrudes, and means defining a seal about the border of said aperture in dirt sealing engagement with portions of said shut-off means above said sensor.
Claim 2
Dependent Claim
163 words
In a wet/dry suction cleaner having an open top dirt receptacle with a top periphery including an air inlet below the top periphery, a power suction module including a housing supporting a motor-blower unit supported on the top periphery of the receptacle with the motor blower unit mounted entirely within the receptacle for drawing wet and dry dirt laden air through the inlet, and air shut-off means including a liquid level sensor secured to the housing and depending into said receptacle, a filter assembly including a fabric filter disposed entirely within said receptacle between the air inlet and the intake to the motor-blower unit, said filter assembly having an annular seal interposed in abutting sandwiched relationship between the top of the receptacle and the module housing, means defining an aperTure in said fabric filter through which said sensor protrudes, and means defining a seal about the border of said aperture in dirt sealing engagement with portions of said shut-off means above said sensor.
Claim 3
Dependent Claim
73 words
In a cleaner as recited in claim 1 wherein said air shut-off means comprises a sensor housing depending from said module housing, said sensor housing inlcuding on the upper portion thereof a flange of substantially the same geometrical shape as said filter aperture, said flange being larger than said aperture, said filter being disposed about said sensor housing with the border of said aperture in abutting relationship with the bottom of said flange.
Claim 4
Dependent Claim
43 words
In a cleaner as recited in claim 2 wherein said filter assembly comprises a fabric filter having a resilient upper peripheral edge, said resilient edge being disposed about a rigid hoop, said annular seal being disposed about said hoop above said resilient edge.
Claim 5
Dependent Claim
38 words
In a cleaner as recited in claim 3 wherein said hoop includes a peripheral shelf for positionally seating said resilient edge, and a peripheral lip above said shelf, said seal including a peripheral groove positioned about said lip.
Claim 6
Dependent Claim
23 words
In a cleaner as recited in claim 3 wherein the border of said aperture inlcudes sewn stitches providing a seal with said flange.
Claim 7
Dependent Claim
20 words
In a cleaner as recited in claim 5 wherein said resilient peripheral edge comprises rubber stripping sewn to said fabric.
Claim 8
Dependent Claim
166 words
A FILTER ASSEMBLY FOR A UTILITY VACUUM CLEANER HAVING AN OPEN TOP DIRT RECEPTACLE A POWER SUCTION MODULE INCLUDING A HOUSING HAVING A PERIPHERAL EDGE MATING WITH THE TOP OF THE RECEPTACLE AND AIR SHUT-OFF MEANS INCLUDING A LIQUID LEVEL SENSOR SUPPORTED BY THE HOUSING AND DEPENDING INTO THE RECEPTACLE SAID ASSEMBLY COMPRISING A SUBSTANTIALLY CUP-LIKE FABRIC FILTER HAVING A RESILIENT RUBBER STRIPING ON THE UPPER PERIPHERAL EDGE SAID RESILIENT EDGE BEING DISPOSED ABOUT A RIGID MOLDED SYNTHETIC PLASTIC HOOP HAVING A PERIPHERAL SHELF FOR POSITIONALLY SEATING SAID RESILIENT EDGE A PERIPHERAL LIP FORMED ON SAID HOOP ABOVE SAID SHELF AN ANNULAR SEAL INCLUDING A PERIPHERAL GROOVE WITHIN WHICH SAID LIP IS RECEIVED SAID SEAL BEING ADAPTED TO BE INTERPOSED BETWEEN SAID HOUSING PERIPHERAL EDGE AND THE TOP OF SAID RECEPTACLE AND MEANS DEFINING A SENSOR RECEIVING APERTURE IN THE BOTTOM OF SAID FABRIC FILTER THE BORDER OF SAID APERTURE INCLUDING STITCHING MEANS ADATED TO PROVIDE A SEAL WITH AN ANNULAR PORTION OF SAID SHUT-OFF MEANS
Claim 9
Dependent Claim
166 words
A FILTER ASSEMBLY FOR A UTILITY VACUUM CLEANER HAVING AN OPEN TOP DIRT RECEPTACLE A POWER SUCTION MODULE INCLUDING A HOUSING HAVING A PERIPHERAL EDGE MATING WITH THE TOP OF THE RECEPTACLE AND AIR SHUT-OFF MEANS INCLUDING A LIQUID LEVEL SENSOR SUPPORTED BY THE HOUSING AND DEPENDING INTO THE RECEPTACLE SAID ASSEMBLY COMPRISING A SUBSTANTIALLY CUP-LIKE FABRIC FILTER HAVING A RESILIENT RUBBER STRIPING ON THE UPPER PERIPHERAL EDGE SAID RESILIENT EDGE BEING DISPOSED ABOUT A RIGID MOLDED SYNTHETIC PLASTIC HOOP HAVING A PERIPHERAL SHELF FOR POSITIONALLY SEATING SAID RESILIENT EDGE A PERIPHERAL LIP FORMED ON SAID HOOP ABOVE SAID SHELF AN ANNULAR SEAL INCLUDING A PERIPHERAL GROOVE WITHIN WHICH SAID LIP IS RECEIVED SAID SEAL BEING ADAPTED TO BE INTERPOSED BETWEEN SAID HOUSING PERIPHERAL EDGE AND THE TOP OF SAID RECEPTACLE AND MEANS DEFINING A SENSOR RECEIVING APERTURE IN THE BOTTOM OF SAID FABRIC FILTER THE BORDER OF SAID APERTURE INCLUDING STITCHING MEANS ADATED TO PROVIDE A SEAL WITH AN ANNULAR PORTION OF SAID SHUT-OFF MEANS
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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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |