US3653190A — Vacuum cleaners

Claim 1

Independent Claim 285 words

A vacuum cleaner having a tank divided into upper and lower chambers, a plurality of fabric filter bags mounted in said upper chamber and communicating with said lower chamber, a connection for delivery of dust-laden air to said lower chamber, an exhauster, a first pipe between said upper chamber and said exhauster to cause air to flow through said filter bags and separate dust from the air, closure valve means in said first pipe, vent valve means connected to said first pipe, valve operating means interconnecting said vent valve means and valve closure means and manipulable to vary the pressure in said upper chamber to shake said filter bags and cause dust to drop therethrough, said tank having a lower section detachable from the upper section thereof and communicating with said lower chamber and having a bottom and side walls, said detachable lower section being normally in sealing engagement with the upper tank section, a disposable bag of flexible material positioned in said detachable lower section with the upper peripheral edge of said disposable bag folded over the upper periphery of said detachable lower section, a second pipe disposed with an upturned end in operative contact with the bottom of said detachable lower section and interconnecting the space between said disposable bag and said detachable lower section with said first pipe at a point between said exhauster and said closure valve means whereby said disposable bag is held against the bottom and side walls of said detachable lower section during operation of said valve means to shake said filter bags, said upturned end of said second pipe being movably mounted for movement into and out of contact with the bottom of said detachable lower section.

Claim 2

Dependent Claim 285 words

A vacuum cleaner having a tank divided into upper and lower chambers, a plurality of fabric filter bags mounted in said upper chamber and communicating with said lower chamber, a connection for delivery of dust-laden air to said lower chamber, an exhauster, a first pipe between said upper chamber and said exhauster to cause air to flow through said filter bags and separate dust from the air, closure valve means in said first pipe, vent valve means connected to said first pipe, valve operating means interconnecting said vent valve means and valve closure means and manipulable to vary the pressure in said upper chamber to shake said filter bags and cause dust to drop therethrough, said tank having a lower section detachable from the upper section thereof and communicating with said lower chamber and having a bottom and side walls, said detachable lower section being normally in sealing engagement with the upper tank section, a disposable bag of flexible material positioned in said detachable lower section with the upper peripheral edge of said disposable bag folded over the upper periphery of said detachable lower section, a second pipe disposed with an upturned end in operative contact with the bottom of said detachable lower section and interconnecting the space between said disposable bag and said detachable lower section with said first pipe at a point between said exhauster and said closure valve means whereby said disposable bag is held against the bottom and side walls of said detachable lower section during operation of said valve means to shake said filter bags, said upturned end of said second pipe being movably mounted for movement into and out of contact with the bottom of said detachable lower section.

Claim 3

Dependent Claim 231 words

A vacuum cleaner having a tank mounted on a frame and divided into upper and lower chambers, a plurality of fabric filter bags mounted in said upper chamber and communicating with said lower chamber, a connection for delivering dust-laden air to said lower chamber, an exhauster, a connection between said upper chamber and said exhauster to cause air to flow through said filter bags and separate dust from the air, said tank having an upper section and a detachable lower section communicating with said lower chamber and normally sealed to the upper section of said tank, said detachable section having bottom and side walls, a disposable bag of flexible material in said lower section with its upper peripheral edge folded over the upper peripheral edge of said detachable lower section, means for shaking said filter bags to cause dust to fall therefrom into said disposable bag, an elevating platform positioned below said detachable lower tank section and adapted to raise the tank section into sealing engagement with the upper tank section, said platform being pivoted at one end to said tank frame and having its opposite end underlying the lower section of the tank and means for raising and lowering the platform comprising a shaft mounted for rotation in bearings in the tank frame, an eccentric disk on the shaft, and an eccentric follower connected to the disk and the platform.

Claim 4

Dependent Claim 231 words

A vacuum cleaner having a tank mounted on a frame and divided into upper and lower chambers, a plurality of fabric filter bags mounted in said upper chamber and communicating with said lower chamber, a connection for delivering dust-laden air to said lower chamber, an exhauster, a connection between said upper chamber and said exhauster to cause air to flow through said filter bags and separate dust from the air, said tank having an upper section and a detachable lower section communicating with said lower chamber and normally sealed to the upper section of said tank, said detachable section having bottom and side walls, a disposable bag of flexible material in said lower section with its upper peripheral edge folded over the upper peripheral edge of said detachable lower section, means for shaking said filter bags to cause dust to fall therefrom into said disposable bag, an elevating platform positioned below said detachable lower tank section and adapted to raise the tank section into sealing engagement with the upper tank section, said platform being pivoted at one end to said tank frame and having its opposite end underlying the lower section of the tank and means for raising and lowering the platform comprising a shaft mounted for rotation in bearings in the tank frame, an eccentric disk on the shaft, and an eccentric follower connected to the disk and the platform.

Claim 5

Dependent Claim 164 words

A vacuum cleaner having a tank divided into upper and lower chambers, a plurality of fabric filter bags mounted in said upper chamber and communicating with said lower chamber, a connection for delivering dust-laden air to said lower chamber, an exhauster, a connection between said upper chamber and said exhauster to cause air to flow through said filter bags and separate dust from the air, said tank having an upper section, and a detachable lower section communicating with said lower chamber and having bottom and side walls, the upper and lower sections of said tank being normally in sealed engagement, partition walls dividing said lower section into a plurality of separate compartments, disposable bags of flexible material in said compartments, means for shaking said filter bags to cause dust to fall therefrom into said disposable bags and means interconnecting the spaces between said disposable bags and the walls of said compartments with said exhauster to hold said bags against the walls of said compartments.

Claim 6

Dependent Claim 164 words

A vacuum cleaner having a tank divided into upper and lower chambers, a plurality of fabric filter bags mounted in said upper chamber and communicating with said lower chamber, a connection for delivering dust-laden air to said lower chamber, an exhauster, a connection between said upper chamber and said exhauster to cause air to flow through said filter bags and separate dust from the air, said tank having an upper section, and a detachable lower section communicating with said lower chamber and having bottom and side walls, the upper and lower sections of said tank being normally in sealed engagement, partition walls dividing said lower section into a plurality of separate compartments, disposable bags of flexible material in said compartments, means for shaking said filter bags to cause dust to fall therefrom into said disposable bags and means interconnecting the spaces between said disposable bags and the walls of said compartments with said exhauster to hold said bags against the walls of said compartments.

Claim 7

Dependent Claim 81 words

A vacuum cleaner according to claim 3 wherein the partitioned walls of adjacent compartments are spaced from each other, the entire upper periphery of each disposable bag is folded over the upper perimeter of the walls of the compartment in which the bag is disposed and a skeleton frame is interposed between the two tank sections, said skeleton frame having pads overlying the top of the partition walls and folded over edges of the disposable bags for sealing the joints therebetween.

Claim 8

Dependent Claim 96 words

A vacuum cleaner in accordance with claim 4 in which the lower section of the tank is cylindrical, the partition walls forming the separate compartments extend radially, the bottom wall of the lower tank section having an opening to each compartment adjacent the center of the section, and the means connecting the exhauster to the space between the lower section of the tank and disposable bags is a header underlying the bottom wall of the lower section of the tank around the openings therein in open communication with the separate compartments between the radial partition walls.

Claim 9

Dependent Claim 44 words

A vacuum cleaner in accordance with claim 5 in which each compartment has a perforated bottom wall spaced from the bottom wall of the lower tank section to support the bottom of each flexible bag above the bottom wall of the lower tank section.

Claim 10

Dependent Claim 100 words

A vacuum cleaner in accordance with claim 6 in which the connection between the upper chamber and exhauster is a pipe, the means connecting the exhauster to the space between the lower section of the tank and the disposable bag is a continuation of the first mentioned pipe at the exhauster, and valve means in the first mentioned pipe for closing the connection between said tank chamber and exhauster and venting said chamber to the atmosphere whereby to maintain a partial vacuum between the lower section of the tank and disposable bag at all times while the exhauster is operating.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1975-04-04	1975-10-04	1976-04-04	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1979-04-04	1979-10-04	1980-04-04	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1983-04-04	1983-10-04	1984-04-04	$7700.00	Window Closed / Lapsed

Vacuum cleaners

Abstract

Inventors

Bibliographic Details

Claims Analysis

References Cited (Backward Citations)

USPTO Annuity & Maintenance Windows

Assigned Categories & Tags

Assign Category Tag