Seal for a universal joint

A seal for sealing a lubricant within a cavity in a universal joint, said universal joint having a trunnion and a bearing cup in spaced relationship to said trunnion, said seal comprising:

• a first case adjacent to the trunnion;
• a second case adjacent to the bearing cup;
• an elastomeric member cooperating with said first case and second case, said elastomeric member having a first portion between the trunnion and said first case, a second portion between the bearing cup and said second case, and a web portion extending from said first portion to said second portion, said web portion permitting relative movement between the trunnion and the bearing cup.

A seal for a universal joint, said universal joint having a trunnion and a bearing cup in spaced relation to said trunnion, said trunnion and said bearing cup defining a cavity for retaining lubricant therein, said seal comprising:

• an elastomer member adjacent to said trunnion, said elastomer member having an inner portion, an outer portion and a flexible web portion between said inner portion and outer portion, said elastomer member further defining a passage communicating with the cavity, said outer portion adjacent to said bearing cup, said flexible web portion permitting relative motion between the trunnion and the bearing cup.

A seal for a universal joint with a trunnion and a bearing cup said trunnion and said bearing cup forming a cavity, said cavity having a plurality of roller bearings therein, a first surface and a second surface radially of said first surface, said seal comprising:

• an inner member adjacent to the bearing cup;
• a webbed portion between said inner and outer members, said webbed portion preventing relative movement between the ton and the bearing cup;
• said inner member being disposed in a first condition adjacent to said first surface of said cavity to permit venting from said cavity and disposed in a second condition adjacent to said second surface of said cavity to prevent venting from said cavity.