US PATENT SUBCLASS 415 / 144
WORKING FLUID BYPASS


Current as of: June, 1999
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415 /   HD   ROTARY KINETIC FLUID MOTORS OR PUMPS

144WORKING FLUID BYPASS {1}
145  DF  .~> Selectively adjustable vane or working fluid control for bypass


DEFINITION

Classification: 415/144

(under the class definition) Apparatus comprising a path for a portion of the working fluid* from the inlet upstream of the runner* through the apparatus, which path includes less than all of the blade* row on the runner* (i.e., less than all runner* stages).

(1) Note. In order to qualify under this definition, there must be means specifically provided to cause the bypass a device having a path for working fluid* which has leaked past a joint and does not include all of the runner* stages is not classified in this group of subclasses, but will be found in subclass 168.1.

(2) Note. Included under this definition is a device comprising a plurality of runner* stages and (1) a plurality of diverse working fluids*, one of which is caused to enter at an intermediate stage, or (2) a single working fluid*, at least a portion of which is discharged at an intermediate stage.

(3) Note. Included under this definition is a pump* comprising a plurality of blade* sets, a separate portion of the working fluid* impinging on each set and discharging separately from the other portion and at a different pressure.

(4) Note. Included under this definition is a device in which a portion of the working fluid* bypasses completely all of the runner* stages and is combined in the outlet conduit

with the working fluid* which has impinged on the runner.

(5) Note. Included under this definition is a device having a pressure relief valve in an intermediate stage for exit of working fluid*. (6) Note. Included under this definition is a device in which working fluid* in passing to a lower runner* stage, is caused to stratify and only one layer is passed to the lower runner* stage, or both layers act on a plurality of runner* stages in parallel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

61, for plural runners* mounted for independent or relative movement and means to bypass at least one of the runners*.

115, for a device in which working fluid* is bypassed around at least one runner* blade row by means of a passage in a vane*, blade*, shaft* or rotary distributor.

116+, for a device in which a plurality of diverse fluids or a plurality of diverse inlets enter the apparatus upstream of all disclosed runner* stages.