US PATENT SUBCLASS 277 / 361
.~.~ Multiple sealing faces (e.g., double seals, etc.)

Current as of: June, 1999
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277 /   HD   SEAL FOR A JOINT OR JUNCTURE

345  DF  SEAL BETWEEN RELATIVELY MOVABLE PARTS (I.E., DYNAMIC SEAL) {10}
358  DF  .~ Relatively rotatable radially extending sealing face member (e.g., face, mechanical, etc.) {9}
361.~.~ Multiple sealing faces (e.g., double seals, etc.) {7}
362  DF  .~.~.~> Floating intermediate sealing face member {1}
364  DF  .~.~.~> Concentric and radially spaced
365  DF  .~.~.~> Three or more
366  DF  .~.~.~> Shaft mounted sealing face members biased axially away from each other
367  DF  .~.~.~> Shaft mounted sealing face members biased axially towards each other
368  DF  .~.~.~> Housing mounted sealing face members biased axially away from each other
369  DF  .~.~.~> Housing mounted sealing face members biased axially towards each other

DEFINITION

Classification: 277/361

Multiple sealing faces (e.g., double seals, etc.):

(under subclass 358) Sealing face member including more than one pair of sealing faces.

(1) Note. Sealing face members having one or more points of contact between them form only one sealing face.

SEE OR SEARCH CLASS

384, Bearings, for more than nominal bearing structure or detail (e.g., liner, bearing race, cage, etc.) combined with a specific seal,

143, for a plain, radial bearing having plural seals consisting of a relatively rotatable, radially extending, sealing face member (e.g., face, mechanical, etc.).