Sieving apparatus

Details Sieving apparatus Sieving apparatus

1990-10-11

1992-09-01

Hajec, Donald T.

Classifying, separating, and assorting solids

Sifting

Elements

2093651, 310325, B07B 142

Patent

active

051432226

ABSTRACT:
Sieving apparatus has a piezoelectric transducer directly bonded to a grating (100), the transducer comprising a number of piezoelectric elements (1) sandwiched between first and second bodies (2,3 ). The first body (2) is in two parts (2A, 2B) which are releasably secured together (6, 7), one part (2B) being directly bonded (5) to the grating (100). The arrangement allows use of a transducer with different gratings with different parts (2B) of a first body (2) bonded thereto in order to achieve a required operational mode.

REFERENCES:
patent: 3049255 (1962-08-01), Newburg
patent: 3140859 (1964-07-01), Scarpa
patent: 3183378 (1965-05-01), McCracken
patent: 3210580 (1965-10-01), Bodine, Jr.
patent: 3331589 (1967-07-01), Hammitt et al.
patent: 3694675 (1972-09-01), Loveday
patent: 3772538 (1973-11-01), Spitov
patent: 4062768 (1977-12-01), Elliot
patent: 4816144 (1989-03-01), Monteith

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