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US 3,954,604 AGranted
Sifting machine
Assignee"Rhewum" Rheinische Werkzeug- u. Maschinenfabrik GmbH
InventorsRudolf Krause, Gunter Erlenstaedt
Life of this patent
Estimating the term…
Abstract
A sifting machine having vibration generators connected to the opposite ends of a sieve screen, the vibration generators being so constructed as to vibrate one end of the sieve screen at a relatively low frequency and a relatively high amplitude and to vibrate the other end of the sieve screen at a relatively high frequency and a relatively low amplitude.
Claims8
A sifting machine, comprising in combination:
- a. a rectangular sieve screen having a first end and a second end, the length of the sieve screen being greater than its width, said length extending between said first and second ends, said sieve screen being inclined in a direction extending downwardly from said first end toward said second end;
- b. a first vibration generator operatively connected to said first end, said first vibration generator having means for imparting a vibration of relatively low frequency and relatively high amplitude to said first end in a direction having a component perpendicular to the plane of said sieve screen;
- c. a second vibration generator operatively connected to said second end, said second vibration generator having means for imparting a vibration of relatively high frequency and relatively low amplitude to said second end in a direction having a component perpendicular to the plane of said sieve screen;
- d. a first clamp located at the first end of the sieve screen to which said first end is mounted;
- e. a second clamp located at the second end of the sieve screen to which said second end is mounted;
- f. a first rotatably mounted shaft located adjacent the first clamp and said first vibration generator;
- g. a second rotatably mounted shaft located adajcent the second clamp and said second vibration generator;
- h. a first lever arm fixedly attached to the first shaft and connected to the first clamp;
- i. a second lever arm fixedly attached to the second shaft and connected to the second clamp;
- j. spring means connected to at least one of said clamps for providing relative yielding movement of the clamps toward each other;
- k. a third lever arm fixedly attached to the first shaft and extending therefrom oppositely from said first lever arm and connected to said first vibration generator;
- and
- l. a fourth lever arm fixedly attached to the second shaft and extending therefrom oppositely from said second lever arm and connected to said second vibration generator.
10 more elements
A sifting machine, comprising in combination:
- a. a sieve screen having a first end and a second end;
- b. a first vibration generator operatively connected to said first end, said first vibration generator having means for imparting a vibration of relatively low frequency and relatively high amplitude to said first end in a direction having a component perpendicular to the plane of said sieve screen;
- c. a second vibration generator operatively connected to said second end, said second vibration generator having means for imparting a vibration of relatively high frequency and relatively low amplitude to said second end in a direction having a component perpendicular to the plane of said sieve screen;
- d. a first clamp located at the first end of the sieve screen to which said first end is mounted;
- e. a second clamp located at the second end of the sieve screen to which said second end is mounted;
- f. a first rotatably mounted shaft located adjacent the first clamp and said first vibration generator;
- g. a second rotatably mounted shaft located adjacent the second clamp and the second vibration generator;
- h. a first lever arm fixedly attached to the first shaft and connected to the first clamp;
- i. a second lever arm fixedly attached to the second shaft and connected to the second clamp;
- j. a third lever arm fixedly attached to the first shaft and extending therefrom oppositely from said first lever arm and connected to said first vibration generator;
- and
- k. a fourth lever arm fixedly attached to the second shaft and extending therefrom oppositely from said second lever arm and connected to said second vibration generator.
9 more elements
A sifting machine, comprising in combination:
- a. a rectangular sieve screen having a first end and a second end, the length of the sieve screen being greater than its width, said length extending between said first and second ends, said sieve screen being inclined in a direction extending downwardly from said first end toward said second end, said first end being the inlet end of the sieve screen and said second end being the outlet end of the sieve screen;
- b. a first vibration generator operatively connected to said first end, said first vibration generator having means for imparting a vibration of relatively low frequency and relatively high amplitude to said first end in a direction having a component perpendicular to the plane of said sieve screen;
- c. a second vibration generator operatively connected to said second end, said second vibration generator having means for imparting a vibration of relatively high frequency and relatively low amplitude to said second end in a direction having a component perpendicular to the plane of said sieve screen;
- d. one of said vibration generators being an eccentric motor;
- e. a first clamp located at the first end of the sieve screen and being attached thereto;
- f. a second clamp located at the second end of the sieve screen and being attached thereto;
- g. spring means connected to at least one of said clamps for providing relative yielding movement of the clamps toward each other;
- h. a frame including means for mounting said clamps thereto adjacent said screen ends and
- i. a transverse bar on said frame, said eccentric motor being fixedly connected to said transverse bar.
6 more elements
Dependencies are inferred from the claim text.