US PATENT SUBCLASS 418 / 75
GROOVED ABUTTING CYLINDER-ROTATING MEMBER END SURFACES

Current as of: June, 1999
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418 /   HD   ROTARY EXPANSIBLE CHAMBER DEVICES

75GROOVED ABUTTING CYLINDER-ROTATING MEMBER END SURFACES {7}
76  DF  .~> Non-working fluid directed to groove
77  DF  .~> Grooved working member surface
78  DF  .~> Working fluid portion fills intertooth spaces or spaces between adjacent vanes
79  DF  .~> Radial groove
80  DF  .~> Radially spaced grooves
81  DF  .~> Annular groove or recess completely encircles rotation axis
82  DF  .~> Groove communicates with vane slot

DEFINITION

Classification: 418/75

(under the class definition) Apparatus in which there is provided an elongate, relatively shallow recess or depression of substantially the same cross-sectional dimension along its center line on at least one-side surface of either one of the adjacent substantially engaging cylinder or rotating member side surface, the recess or depression being other than the inlet or outlet or a part of the inlet or outlet of the device.

(1) Note. The recess or depression may be fluidly connected to the inlet or outlet of the device or may be connected to a source of nonworking fluid or it may collect leakage pressure fluid only.

(2) Note. The recess or depression enhances the operation of the device and may be used for lubricating, cooling, sealing, balancing, conducting fluid to or from a vane slot, etc.

(3) Note. A mere port is not considered proper for classification here, however, a port having a flared mouth portion is considered classifiable here. Otherwise, the elongate shallow recess or depression has substantially the same dimensions about its center line for a substantial portion of its length.