Idler roller bearing and seal
AssigneeFMC Corporation
InventorSamuel O. Peach
Life of this patent
Estimating the term…
Abstract
A seal and bearing assembly is provided to seal the end of a conveyor roller. The seal is made up of an outer lip seal of a pliable material, a contact seal, a metallic labyrinth element and an interlocking labyrinth pliable material seal inboard of the outer lip seal.
Claims4
A rotation motion accommodating seal for use in preventing the passage of a contaminant from one side of the seal to the other side of the seal comprising:
- a first labyrinth element having an outermost circumference and a first and a second circumferential projection inboard of said outermost circumference;
- a second labyrinth element having a central aperture defined by a significant base portion and a first and a second circumferential groove which accommodate said first and said second circumferential projections;
- a seal case having a circumference and having a circumferential wall, said wall in contact with said first labyrinth element and having a cross sectional shape defining a reversed S-shape with a web connecting said seal case wall to an innermost circumference of said seal case;
- a contact seal having a surface contacting said innermost circumference of said seal case;
- a circumferential lip sea having a cavity for accommodating said contact seal and said innermost circumference of said seal case and having a second cavity for accommodating said web of said seal case and having a circumferential lip greater than the circumference of said seal case.
A rotational motion accommodating seal for use in an assembly including an axle portion and a center tube supported by a bearing on said axle, said center tube having a circumferential end surface, said seal comprising:
- a first labyrinth element carried inside said tube and in contact therewith, said first labyrinth having first and second projections;
- a second labyrinth element carried on said axle and having first and second circumferential grooves which accommodate said first and second circumferential projections of said first labyrinth element;
- a contact seal in contact with said second labyrinth element;
- and
- a circumferential lip seal carried on said axle outboard of said second labyrinth element having a cavity for accommodating said contact seal, said lip seal having a circumferential lip in contact with said circumferential end surface of said center tube.
Dependencies are inferred from the claim text.