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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 8060978 | Surface sweeping machine with tilting blower housing A road sweeper includes a blower housing having an opening, a hopper having an opening, and the openings being in axial alignment when the hopper and blower housing are each in a sweeping position thereof. The blower housing is biased for tilting movement from its s... | 11/22/2011 |
| 7185953 | Surface sweeping machine with a dump door and chute actuating mechanism A dump hopper for a road sweeper includes a dump door, a debris guide chute, and an actuating mechanism for pivoting the dump door and debris chute between travel and dumping positions. The dump door is sandwiched between a hopper and the guide chute in the travel p... | 03/06/2007 |
| 6161250 | Dustless regenerative air sweeper A closed-loop Regenerative.RTM. air sweeper is provided which constitutes an improvement of that disclosed in U.S. Pat. No. 3,512,206. The sweeper of the latter patent is provided as an integral portion thereof, whereas a conversion, a "dustless" mechanis... | 12/19/2000 |
| 5564147 | Broom assisted pick-up head A pick-up head is formed by a housing which defines a broom chamber rearward of an associated air pressure chamber and its associated blast orifice. The broom is rotated in a direction to impel debris from a surface in the same direction as air emitted fr... | 10/15/1996 |
| 5560065 | Broom assisted pick-up head A pick-up head is formed by a housing which defines a broom chamber rearward of an associated air pressure chamber and its associated blast orifice. The broom is rotated in a direction to impel debris from a surface in the same direction as air emitted fr... | 10/01/1996 |
| 5542148 | Broom assisted pick-up head A pick-up head is formed by a housing which defines a broom chamber rearward of an associated air pressure chamber and its associated blast orifice. The broom is rotated in a direction to impel debris from a surface in the same direction as air emitted fr... | 08/06/1996 |
| 5363533 | Surface sweeping machine with over-the-cab hopper dumping A road sweeper which includes a hopper between a cab and a centrifugal separator, a pair of relatively telescopically extendable and retractable members, one member of each pair being pivoted to a frame of the vehicle and another member of each pair being... | 11/15/1994 |
| 5337444 | Surface sweeping machine with over-the-cab hopper dumping A road sweeper which includes a hopper between a cab and a centrifugal separator, a pair of relatively telescopically extendable and retractable members, one member of each pair being pivoted to a frame of the vehicle and another member of each pair being... | 08/16/1994 |
| 5173989 | Surface sweeping machine with over-the-cab hopper dumping A road sweeper which includes a hopper between a cab and a centrifugal separator, a pair of relatively telescopically extendable and retractable members, one member of each pair being pivoted to a frame of the vehicle and another member of each pair being... | 12/29/1992 |
| 5113548 | Surface sweeping machine with over-the-cab hopper dumping A street sweeper which includes a frame, a hopper, a cab and a centrifugal separator on opposite sides of the hopper, a mechanism for moving the hopper from a position behind the cab to a position above and forward of the cab for dumping debris from the h... | 05/19/1992 |
| 5072485 | Surface sweeping machine with over-the-cab hopper dumping A road sweeper which includes a hopper between a cab and a centrifugal separator, a pair of relatively telescopically extendable and retractable members, one member of each pair being pivoted to a frame of the vehicle and another member of each pair being... | 12/17/1991 |
| 4660248 | Pickup truck mounted sweeper This disclosure relates to a sweeper for roads, parking lots or like surfaces which is particularly adapted to be mounted upon a bed of a pickup truck, the sweeper including a hopper into which air-entrained debris is discharged, the hopper having a fore-... | 04/28/1987 |
