Vibrating screen apparatus for use in non-level operating conditions

A vibrating screen apparatus comprising:

• a base;
• a frame;
• a screen deck coupled to the frame;
• means for vibrating the frame and the screen deck;
• and
• a plurality of rubber shear spring assemblies, each including a rubber element coupled between the frame and the base so that a first plane in which that rubber element lies is substantially perpendicular to both a second plane in which the frame lies and a third plane in which the base lies, the rubber shear spring assemblies permitting vibrating movement of the frame relative to the base in a direction substantially perpendicular to the base and resisting lateral movement of the frame relative to the base resulting from a non-level condition of the base.

A vibrating screen apparatus comprising:

• a base;
• a frame;
• a screen deck coupled to the frame;
• means for vibrating the frame and the screen deck;
• and
• a plurality of rubber shear spring assemblies coupled between the frame and the base, each rubber shear spring assembly permitting vibrating movement of the frame relative to the base in a direction substantially perpendicular to the base, each rubber shear spring assembly resisting compressive and tensile forces thereby limiting lateral movement of the frame relative to the base during non-level conditions of the base, and each rubber shear spring assembly including a first plate for coupling the rubber shear spring assembly to the base, a second plate spaced apart from the first plate for coupling the rubber shear spring assembly to the frame, and a rubber element coupled to both the first and second plates and having the shape of an oblique rectangular prism.

A vibrating screen apparatus comprising:

• a base;
• a frame;
• a screen deck coupled to the frame;
• means for vibrating the frame and the screen deck;
• and
• a plurality of rubber shear spring assemblies coupled between the frame and the base, each rubber shear spring assembly permitting vibrating movement of the frame relative to the base in a direction substantially perpendicular to the base and each rubber shear spring assembly resisting compressive and tensile forces thereby limiting lateral movement of the frame relative to the base during non-level conditions of the base;
• wherein the vibrating means comprises:
• an eccentric drive shaft;
• a shaft housing surrounding the drive shaft;
• a bearing coupled to the drive shaft;
• means for rotating the drive shaft to vibrate the frame and the screen deck;
• an oil housing coupled to an end of the drive shaft adjacent the bearing to provide an oil chamber for lubricating the bearing;
• a seal coupled to the drive shaft to prevent oil from passing out of the oil housing on the drive shaft;
• and
• means for capturing oil which moves past the seal on the drive shaft and returning the captured oil to the oil housing, the capturing and returning means including a baffle coupled to the shaft housing adjacent the oil housing to define an oil collection pocket in the shaft housing.

A vibrating screen apparatus comprising:

• a base;
• a frame;
• a screen deck coupled to the frame;
• a plurality of spring mounts coupled between the frame and the base for supporting the frame;
• means for vibrating the frame and the screen deck;
• and
• means for reducing lateral forces on the spring mounts resulting from a non-level condition of the base, said means including a rubber shear spring assembly coupled between the frame and the base adjacent each spring mount;
• wherein each spring mount includes a coil spring coupled between the base and the frame and a rubber shear spring assembly is coupled between the frame and the base adjacent the coil spring.

A vibrating screen apparatus comprising:

• a base;
• a frame;
• a screen deck coupled to the frame;
• a plurality of spring mounts coupled between the frame and the base for supporting the frame;
• means for vibrating the frame and the screen deck;
• and
• means for reducing lateral forces on the spring mounts resulting from a non-level condition of the base, said means including a rubber shear spring assembly coupled between the frame and the base adjacent each spring mount, each rubber shear spring assembly including a first plate for coupling the rubber shear spring assembly to the base, a second plate spaced apart from the first plate for coupling the rubber shear spring assembly to the frame, and a rubber element coupled to both the first and second plates and having the shape of an oblique rectangular prism.

A vibrating screen apparatus comprising:

• a base;
• a frame;
• a screen deck coupled to the frame;
• a plurality of spring mounts coupled between the frame and the base for supporting the frame;
• means for vibrating the frame and the screen deck;
• and
• means for reducing lateral forces on the spring mounts resulting from a non-level condition of the base, said means including a rubber shear spring assembly coupled between the frame and the base adjacent each spring mount;
• wherein each spring mount includes a coil spring coupled between the base and the frame and the means for reducing lateral forces on the spring mounts is coupled between the frame and the base adjacent the coil spring.

A vibrating screen apparatus comprising:

• a base;
• a frame;
• a screen deck coupled to the frame;
• a plurality of spring mounts coupled between the frame and the base for supporting the frame;
• means for vibrating the frame and the screen deck;
• and
• means for reducing lateral forces on the spring mounts resulting from a non-level condition of the base, said means including a rubber shear spring assembly coupled between the frame and the base adjacent each spring mount;
• wherein each spring mount includes two spaced apart coil springs coupled between the base and the frame and the means for reducing lateral forces on the spring mounts is coupled between the frame and the base at a position between the two coil springs.

A vibrating screen apparatus comprising:

• a base;
• a frame;
• a screen deck coupled to the frame;
• a plurality of spring mounts coupled between the frame and the base for supporting the frame;
• means for reducing lateral forces on the spring mounts resulting from a non-level condition of the base, said means including a rubber shear spring assembly coupled between the frame and the base adjacent each spring mount;
• and
• means for vibrating the frame and the screen deck, the vibrating means including:
• an eccentric drive shaft;
• a shaft housing surrounding the drive shaft;
• a bearing coupled to the drive shaft;
• means for rotating the drive shaft to vibrate the frame and the screen deck;
• an oil housing coupled to an end of the drive shaft adjacent the bearing to provide an oil chamber for lubricating the bearing;
• a seal coupled to the drive shaft to prevent oil from passing out of the oil housing on the drive shaft;
• and
• means for capturing oil which moves past the seal on the drive shaft and returning the captured oil to the oil housing, the capturing and returning means including a baffle coupled to the shaft housing adjacent the oil housing to define an oil collection pocket in the shaft housing.

A vibrating screen apparatus comprising:

• a base;
• a frame;
• a screen deck coupled to the frame;
• a plurality of spring mounts coupled between the frame and the base for supporting the frame in a direction substantially perpendicular to the base, each spring mount including a coil spring coupled between the base and the frame;
• means for vibrating the frame and the screen deck;
• and
• means for reducing lateral forces on the spring mounts resulting from a non-level condition of the base, said means including a rubber shear spring assembly coupled between the frame and the base adjacent the coil spring and having a rubber element coupled between the frame and the base adjacent each spring mount.

A vibrating screen apparatus comprising:

• a base;
• a frame;
• a screen deck coupled to the frame;
• a plurality of spring mounts coupled between the frame and the base for supporting the frame in a direction substantially perpendicular to the base, each spring mount including a coil spring coupled between the base and the frame;
• means for vibrating the frame and the screen deck;
• and
• means coupled between the frame and the base adjacent the coil spring for reducing lateral forces on the spring mounts resulting from a non-level condition of the base, said means including a rubber shear spring assembly having a rubber element coupled between the frame and the base adjacent each spring mount.

A vibrating screen apparatus comprising:

• a base;
• a frame;
• a screen deck coupled to the frame;
• a plurality of spring mounts coupled between the frame and the base for supporting the frame in a direction substantially perpendicular to the base, each spring mount including two spaced apart coil springs coupled between the base and the frame;
• means for vibrating the frame and the screen deck;
• and
• means coupled between the frame and the base at a position between the two coil springs for reducing lateral forces on the spring mounts resulting from a non-level condition of the base, said means including a rubber shear spring assembly having a rubber element coupled between the frame and the base adjacent each spring mount.

A vibrating screen apparatus comprising:

• a base;
• a frame;
• a screen deck coupled to the frame;
• a plurality of spring mounts coupled between the frame and the base for supporting the frame in a direction substantially perpendicular to the base;
• means for vibrating the frame and the screen deck, the vibrating means including an eccentric drive shaft, a bearing coupled to the drive shaft, means for rotating the drive shaft to vibrate the frame and the screen deck, an oil housing coupled to an end of the drive shaft adjacent the bearing to provide an oil chamber for lubricating the bearing, a seal coupled to the drive shaft to prevent oil from passing out of the oil housing on the drive shaft, and means for capturing oil which moves past the seal on the drive shaft and returning the captured oil to the oil housing, the capturing and returning means including a baffle coupled to the shaft housing adjacent the oil housing to define an oil collection pocket in the shaft housing;
• means for reducing lateral forces on the spring mounts resulting from a non-level condition of the base, said means including a rubber shear spring assembly having a rubber element coupled between the frame and the base adjacent each spring mount;
• and
• a shaft housing surrounding the drive shaft.