Bellows actuator

Details Bellows actuator Bellows actuator

1981-06-11

1984-08-14

Garrett, Robert E.

Expansible chamber devices

Bellows type expansible chamber

264506, 264520, F01B 1904

Patent

active

044649800

ABSTRACT:
A blow-molded bellows of a thermoplastic elastomeric material has a generally cylindrical hollow accordion-type convolution section and ends integral therewith. The ends has axial protrusions extending outwardly from the central areas of respective ends. Each protrusion is connected to an adjacent convolution by an integral shoulder which has inwardly concave portions and outwardly convex portions. The concave portions are adjacent to the parting line, whereas the convex portions are remote from the parting line. By this feature of the bellows, the outermost convolutions of the accordion-type convolution section of the bellows can be molded into circumferentially substantially uniform wall thickness to assure improved operability and heat-resistant property of the bellows.

REFERENCES:
patent: 3319532 (1967-05-01), Pridham, Jr.
patent: 3989784 (1976-11-01), Uhlig

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