Diaphragm-housing connection in a pneumatic booster

Details Diaphragm-housing connection in a pneumatic booster Diaphragm-housing connection in a pneumatic booster

1990-07-18

1991-10-22

Look, Edward K.

Expansible chamber devices

Plural flexible wall working members

92 98R, 92 96, 913692, F01B 1900

Patent

active

050584863

ABSTRACT:
A pneumatic booster has a housing which includes a forward shell and a rearward shell, and a diaphragm which is installed inside the housing and secured at the outer peripheral portion thereof to the housing. The diaphragm has a bead formed on the outer peripheral portion thereof. The rearward shell has a bead retaining portion which has a bead retaining groove that opens radially outward. The forward shell has an outer peripheral portion. The bead is received into the bead retaining groove across one edge portion of the bead retaining groove and clamped between the groove and the outer peripheral portion of the forward shell. The dimensions of the bead and the bead retaining portion are set so that the inner diameter of the bead is greater than the outer diameter of the edge portion of the bead retaining groove. Thus, the rearward shell and the diaphragm can be assembled together without the need to bend the diaphragm in advance, and the assembly process is correspondingly facilitated.

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patent: 4747336 (1988-05-01), Uyama
patent: 4854220 (1989-08-01), Imayoshi
patent: 4936191 (1990-06-01), Kobayashi

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