초록 ▼

The freezing chamber of a frozen or semi-frozen confection freezer has a mixing rotor having a shaft which extends through an opening in a wall. The seal between the shaft and wall comprises an elastomeric cup having a rim engaged with the wall about said opening. The cup has a hub engaged with the

The freezing chamber of a frozen or semi-frozen confection freezer has a mixing rotor having a shaft which extends through an opening in a wall. The seal between the shaft and wall comprises an elastomeric cup having a rim engaged with the wall about said opening. The cup has a hub engaged with the shaft and a yieldable skirt between the hub and the rim. The hub has a socket which receives a metal ring with an oblique wear surface. An O-ring is engaged between a fillet on the shaft and the oblique wear surface on the ring whereby the cup is self-centering with respect to the shaft, notwithstanding any tendency of the shaft to nutate.

대표청구항 ▼

In a frozen or semi-frozen confection freezer having a freezing chamber with a mixing rotor having a shaft therein, a wall having an opening through which the shaft extends and a seal between the shaft and wall to seal confection in said chamber from said opening, the improvement in which said seal

In a frozen or semi-frozen confection freezer having a freezing chamber with a mixing rotor having a shaft therein, a wall having an opening through which the shaft extends and a seal between the shaft and wall to seal confection in said chamber from said opening, the improvement in which said seal comprises an elastomeric cup having a rim engaged with the wall about said opening, a hub adapted to be engaged with the shaft and a yieldable skirt between the hub and rim, a metal ring and means mounting the ring on the hub, said ring having an oblique wear surface, an O-ring in contact with said oblique metal wear surface on the ring and in contact with said shaft whereby the cup is self-centering with respect to the shaft notwithstanding any tendency of the shaft to nutate.