Bellows-type pump

Details Bellows-type pump Bellows-type pump

1989-06-23

1991-01-08

Chambers, A. Michael

Pumps

Expansible chamber type

Bellows-type chamber

92 42, F04B 4502

Patent

active

049831046

ABSTRACT:
A bellows-type pump having a support ring positioned interiorly within the coil of the plastic bellows. The support ring is initially coiled to a diameter smaller than the normal bellows coil diameter. The free ends of the support ring have a telescopic relationship so that, when expanded to form a complete loop for supportive engagement within the bellows coil, the oppose free ends of the loop circumferentially engage one another and are positively held in telescopic engagement due to the circumferential hoop stress of the support ring.

REFERENCES:
patent: 1561065 (1925-11-01), Eggleston

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