Vaccum cleaners especially quiet vacuum cleaners, pumps, and engines
First Claim
1. A vacuum cleaner, wherein no centrifugal impeller is included and wherein a siren scream noise is not made, wherein the vacuum cleaner delivers a vacuum suction of at least about 300 inches of water.
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Accused Products
Abstract
This impeller-free vacuum cleaner is based on a rotary piston. Vacuum suction of 300 inches of water or better can be delivered. Quietness of below 70 db can be delivered. Tongued rotary piston assemblies may be strategically placed, such as stacked, to eliminate vacuum suction dead zones. Sealing problems that otherwise were encountered with previous reciprocating and rotary piston structures for vacuum cleaners are solved by using a tongued rotary piston with a double-notched rotary valve operating by a Geneva mechanism, and a novel pancake-shaped cylindrical structure to house the rotary piston. An inventive rotary combustion engine also is disclosed.
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Citations
30 Claims
- 1. A vacuum cleaner, wherein no centrifugal impeller is included and wherein a siren scream noise is not made, wherein the vacuum cleaner delivers a vacuum suction of at least about 300 inches of water.
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7. An impeller-free vacuum cleaner, comprising:
- a reciprocating piston actuated by a diamond level wind screw.
- View Dependent Claims (8)
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9. A vacuum cleaner comprising a double-acting piston.
- 10. A vacuum cleaner comprising at least one rotary piston.
- 20. A vacuum cleaner, comprising a stack of at least two rotary pistons, each rotary piston disposed in a respective hollow, closed chamber.
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27. A vacuum cleaner comprising a set of at least two tongued rotary pistons in a single chamber, the piston tongues being staggered to minimize dormant zones.
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28. A vacuum cleaner, comprising a Geneva mechanism.
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29. A rotary combustion engine, without any trochoidal chamber.
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30. A rotary piston engine including at least one piston, wherein the piston (i) always follows a purely circular path and/or (ii) does not reciprocate and/or (iii) need not speed up or slow down to operate properly.
Specification