Oilless rotary vane pump having open ends of vane grooves...

Details Oilless rotary vane pump having open ends of vane grooves... Oilless rotary vane pump having open ends of vane grooves...

2005-07-27

2009-12-15

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Non-radially positioned sliding vane or abutment

C418S152000, C418S178000

Reexamination Certificate

active

07632084

ABSTRACT:
It is an object of the present invention to provide a vane rotary type air pump in which a pump mechanism and a drive motor are directly connected to each other and low noise is realized. In the vane rotary type air pump in which a cylinder (103), a rotor (110) and a vane (112) are sandwiched between a front plate (not shown) and a rear plate (not shown), an opened end (111b) of the vane groove (111) is provided in a reversed rotation direction region of the rotor (110) with respect to straight line connecting a center O of the rotor (110) and the closed end (111a) of the vane groove (111). That is, a “stroke” type vane disposition is employed. With this noise of the air pump is reduced.

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Chinese Office Action dated Oct. 19, 2007 w/translation.
Chinese Office Action mailed Jul. 17, 2009, including an English-language translation.

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