Expansible chamber devices – Cylinder detail – With reinforcing member
Patent
1984-08-08
1987-08-04
Garrett, Robert E.
Expansible chamber devices
Cylinder detail
With reinforcing member
181200, F01B 1102
Patent
active
046838074
ABSTRACT:
A vacuum brake booster assembly comprising front and rear housing shells connected to form a single piece their output peripheral edges and mounted within the passenger compartment of a vehicle, a piston body axially movable in the housing shells, a diaphragm member hermetically secured at its inner peripheral edge to the piston body and clamped at its outer peripheral edge by the outer peripheral edges of the housing shells to subdivide the interior of the housing shells into a vacuum chamber and a variable pressure chamber, and a pressure control valve cooperable with the piston body for selectively communicating the variable pressure chamber to the vacuum chamber or the atmospheric air in response to movements of the piston body, wherein at least the rear housing shell is formed as a double or multi layer wall for the variable pressure chamber to dampen air suction noises caused by expansion and vibration of the air flowing through the valve into the variable pressure chamber from the passenger compartment in response to actuation of the brake booster assembly.
REFERENCES:
patent: 733379 (1903-07-01), Felt
patent: 3012544 (1961-12-01), Pulkownik
patent: 3125003 (1964-03-01), Hoekstra
patent: 3799703 (1974-03-01), Paine et al.
patent: 3996913 (1976-12-01), Hamparian
patent: 4022112 (1977-05-01), Putt et al.
patent: 4135830 (1979-01-01), Hishida et al.
patent: 4146112 (1979-03-01), Usry
patent: 4408679 (1983-10-01), Littrell
patent: 4442419 (1984-04-01), Kanoi et al.
Furuta Youichi
Kiriyama Takashi
Murata Takeo
Nishii Michiharu
Shibatani Juichi
Aisin Seiki Kabushiki Kaisha
Garrett Robert E.
Toyota Jidosha & Kabushiki Kaisha
Williamson Mark A.
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