Title:
CLAW PUMP
Document Type and Number:
WIPO Patent Application WO/2015/068762
Kind Code:
A1
Abstract:
A claw pump has: a housing forming a pump chamber; two rotating shafts arranged parallel to each other inside the housing; a pair of rotors secured respectively to the two rotating shafts inside the housing, hook-shaped pawls that mesh with each other without coming in contact being formed on the rotors; a rotational drive device for rotatably driving the pair of rotors; and an intake port and discharge port formed in the wall of the housing. The discharge port is configured from a first discharge port and a second discharge port, the first discharge port being formed in a position that, within a compression space formed by a first pocket and a second pocket merging together between the pair of rotors and the wall of the housing, is interconnected with an initial compression space formed in the initial state of a compression stroke, and the second discharge port being formed in a position that, within the compression space, is interconnected with a final compression space formed in the final stage of the compression stroke. The claw pump is provided with an opening/closing mechanism which opens the first discharge port when the pressure of the initial compression space reaches a threshold equal to or greater than atmospheric pressure, and closes the first discharge port when the pressure does not reach this threshold.
Inventors:
KOBAYASHI KENICHI (JP)
Application Number:
PCT/JP2014/079436
Publication Date:
May 14, 2015
Filing Date:
November 06, 2014
Export Citation:
Assignee:
ANEST IWATA CORP (JP)
International Classes:
F04C18/18; F04C29/12
Foreign References:
JPH07243331A | 1995-09-19 | |||
JPH03194184A | 1991-08-23 | |||
JPS6045719A | 1985-03-12 | |||
JP2011038476A | 2011-02-24 |
Other References:
See also references of EP 3067563A4
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
Yoshiki Hasegawa (JP)
Yoshiki Hasegawa (JP)
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