Elliptic motion driving apparatus for a step screen

• US 6,490,941 B1
• Filed: 03/28/2000
• Issued: 12/10/2002
• Est. Priority Date: 03/28/2000
• Status: Expired due to Fees

• Current Assignee: Sookja Ree
• Original Assignee: Hur, Sung
• Inventors: Hur, Sung
• Primary Examiner(s): FENSTERMACHER, DAVID MORGAN
• Application Number:
  US09/536,608
• Time in Patent Office: 987 Days
• Field of Search: 74/25, 209/314, 209/309, 198/774.3, 198/775, 198/750.8
• US Class Current: 74/25
• CPC Class Codes: B01D 29/03 self-supporting
• CPC Class Codes: B01D 29/445 Bar screens
• CPC Class Codes: B01D 29/6476 with a rotary movement with respect to the filtering element
• CPC Class Codes: B01D 33/0166 Bar screens
• CPC Class Codes: B01D 33/275 using contiguous impervious surfaces
• CPC Class Codes: B01D 33/801 Driving means, shaft packing systems or the like
• CPC Class Codes: B07B 1/42 Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
• CPC Class Codes: F16H 21/10 all movement being in, or parallel to, a single plane
• CPC Class Codes: Y10T 74/18056 Rotary to or from reciprocating or oscillating

Abstract

An elliptic motion driving apparatus for a step screen in which the elliptic motion of an elliptic motion driving unit is transferred to a driven link so as to make steep movable plates, connected by a movable column, perform elliptical movement in a longitudinal direction of the movable column, includes a driving rotation cam combined to a power transmission shaft rotating in linkage with a worm reduction gear of a driving motor, a horizontal motion eccentric shaft axially combined to the driving rotation cam so that a horizontal eccentric bearing of the horizontal motion eccentric shaft moves horizontally along a horizontal motion guiding rail, and a vertical motion eccentric shaft combined to the horizontal motion eccentric shaft through an eccentric rotation cam so that a vertical eccentric bearing of the vertical motion eccentric shaft moves vertically along a vertical motion guiding rail as the horizontal motion eccentric shaft rotates.

Claims

1. An elliptic motion driving apparatus for a step screen in which elliptic motion of an elliptic motion driving unit is transferred to a driven link so as to make a plurality of movable plates, connected by a movable column, perform an elliptical movement in a longitudinal direction of the movable column, the apparatus comprising:

a worm reduction gear which is driven by a drive motor for driving a power transmission;

a driving rotation cam having a first end coupled to said power transmission shaft and includes a second end;

a horizontal motion guiding rail;

a vertical motion guide rail;

an eccentric shaft for horizontal motion axially connected to said second end of said driving rotation cam, said eccentric shaft having a horizontal eccentric bearing for horizontal motion thereof which is movable horizontally along said horizontal motion guiding rail upon rotation of said driving rotation cam, said eccentric shaft having a vertical eccentric beating; and

an eccentric shaft for vertical motion and an eccentric rotation cam mounted on said eccentric shaft for vertical motion and being engagable with said eccentric shaft for horizontal motion through said eccentric rotation cam such that said vertical eccentric bearing of the eccentric shaft for vertical motion moves vertically along said vertical motion guiding rail upon rotation of said eccentric shaft for horizontal motion.