Expansible chamber devices – Collapsible chamber wall portion – Wall portion formed of flexible material
Patent
1985-06-14
1986-08-12
Scott, Samuel
Expansible chamber devices
Collapsible chamber wall portion
Wall portion formed of flexible material
92 98R, 92128, 220 4B, 220319, 403338, F16J 300
Patent
active
046049444
ABSTRACT:
A pneumatic booster device having an elliptical housing is formed of two stamped metal sections having mating flange and opening portions, the two sections being joined in a simple, effective, easily diassembleable manner without the use of standard nut and bolt fasteners. The flange portion and opening portion are formed with mating abutting portions for limiting the depth of insertion of the second shell into the first shell, and the flange portion of the second shell is formed with a plurality of notches extending from the outer periphery toward the center which are arranged circumferentially and spaced from one another; the opening portion of the first shell is provided with a plurality of projecting pawls for clamping the flange portion of the second shell via a pair of U-shaped lock members disposed adjacent to the outside of the flange portion; the pawls are aligned with the notches in the axial direction of the housing and made smaller than the notches; gaps are left between the inner periphery of the pair of lock members and the second shell and between the opposite ends of both lock members for permitting each lock member to slide a given extent; each lock member is formed with notches to cancel a locked relation of the lock member with the pawls as the lock member slides the given extent; and a stopper is incorporated for preventing sliding of the lock members in a normal state.
REFERENCES:
patent: 2616587 (1952-11-01), Petch
patent: 3030127 (1962-04-01), Stelzer
patent: 4296680 (1981-10-01), Ohta et al.
Aisin Seiki Kabushiki Kaisha
Flanigan Allen J.
Scott Samuel
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