Title:
VACUUM CLEANERS ESPECIALLY QUIET VACUUM CLEANERS, PUMPS, AND ENGINES
Document Type and Number:
WIPO Patent Application WO/2005/107552
Kind Code:
A3
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-cylindrical
structure to house the rotary piston. An inventive rotary combustion engine
also is disclosed.
Inventors:
CASTRONOVO CHARLES A (US)
Application Number:
PCT/US2005/014652
Publication Date:
April 19, 2007
Filing Date:
April 29, 2005
Export Citation:
Assignee:
CASTRONOVO CHARLES A (US)
International Classes:
A47L5/20; A47L5/12; A47L5/16; F04B37/14; F04C18/28; F04C18/50
Foreign References:
| US2378347A | 1945-06-12 | |||
| US4235293A | 1980-11-25 | |||
| US2994098A | 1961-08-01 | |||
| US3410477A | 1968-11-12 | |||
| US3380103A | 1968-04-30 | |||
| US5797366A | 1998-08-25 | |||
| US5243733A | 1993-09-14 |
Other References:
See also references of EP 1748716A4
Attorney, Agent or Firm:
WHITHAM, Michael, E. et al. (Curtis & Christofferson PC, 11491 Sunset Hills Road, Suite 34, Reston VA, US)
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