Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1977-12-14
1981-01-20
Smith, Robert I.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
92 98D, F16J 1512
Patent
active
042458455
ABSTRACT:
A vacuum booster device having a diaphragm the inner peripheral portion of which is rigidly clamped between the outer peripheral portion of a valve body and the central portion of a piston plate, wherein a rigid annular ring is attached to the diaphragm for preventing the radial outward movement of the material of the inner peripheral portion of the diaphragm when the diaphragm is compressed axially between the valve body and the piston plate.
REFERENCES:
patent: 2102673 (1937-12-01), Brown
patent: 2431653 (1947-11-01), Volpin
patent: 3336843 (1967-08-01), Griswold
Ando Hiromi
Azuma Tomizo
Smith Robert I.
Tokico Ltd.
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