Magnetic pump drive

Details Magnetic pump drive Magnetic pump drive

1988-04-11

1991-03-12

Smith, Leonard E.

Pumps

With signal, indicator, or inspection means

417420, 41742311, 41742314, 464 29, F04B 4910

Patent

active

049988638

ABSTRACT:
A magnetic pump drive comprises a double-walled isolating shell having an inner shell and an outer shell. The inner shell and the outer shell are in contact at least along a cylindrical section of both shells. In the contact area, a channel system is incorporated between the shells by means of which channels the intactness of both shells may be checked. Channels of the channel system have the shape of a screw-channel. The magnetic pump drive so constructed closely approximates the characteristics of one constructed with a unitary thick-walled isolation shell.

REFERENCES:
patent: 2662478 (1953-12-01), Surre
patent: 3131638 (1964-05-01), Wilson et al.
patent: 3163790 (1964-12-01), White
patent: 3605566 (1971-09-01), Vetter
patent: 3661060 (1972-05-01), Bowen
patent: 4013384 (1977-03-01), Oikawa
patent: 4120618 (1978-10-01), Klaus
patent: 4226574 (1980-10-01), Villette
patent: 4569634 (1986-02-01), Mantell
patent: 4600821 (1986-07-01), Fichtner et al.
patent: 4752194 (1988-06-01), Wienen et al.
patent: 4838763 (1989-06-01), Kramer et al.
patent: 4854823 (1989-08-01), Hatting et al.
Magazine article, "The Double Walled Safety", Kramer and Neumaier, 4 pages, Mar. 1987.

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