Liquid Pool Seal For Gas Pump Valve Patents (Class 417/433)
  • Patent number: 9614412
    Abstract: A shaft assembling structure includes a shaft hole formed on a motor rotor and a shaft with a shaft end sheathed on a shaft hole of the motor rotor. The shaft assembling structure further includes a direction setting member secured to the top of the motor rotor and embedded with the shaft, and at least one direction setting member disposed at the bottom of the shaft assembling structure and extended into the first direction setting portion of shaft hole. The shaft end of the shaft includes at least one second direction setting portion embedded into the corresponding first direction setting portion. When the second direction setting portion is aligned precisely with the first direction setting portion, the shaft hole of the motor rotor is sheathed on the shaft end of the shaft to facilitate the process of recognizing and confirming the rotating direction of the shaft.
    Type: Grant
    Filed: October 3, 2014
    Date of Patent: April 4, 2017
    Assignee: JIA HUEI MICROSYSTEM REFRIGERATION CO., LTD.
    Inventor: Wen-Fu Chiang
  • Patent number: 6102680
    Abstract: In addition to seating on its valve seat during the combined compression and discharge stroke, the suction valve seats on the structure associated with the valve seat which has at least one shallow recessed area. In seating on its valve seat, the suction valve seats on the structure defining the shallow recesses to trap fluid therein. The recesses serve to reduce the area available for adhesion and the trapped fluid pressure provides an opening bias to the suction valve. If necessary, or desired, restricted communication between the compression chamber and the shallow recess can take place to provide a higher pressure in the recess at the time of transition from discharge to suction.
    Type: Grant
    Filed: July 1, 1998
    Date of Patent: August 15, 2000
    Assignee: Carrier Corporation
    Inventors: Bruce A. Fraser, Michael J. Dormer
  • Patent number: 5358389
    Abstract: This invention relates to a vacuum pump. The pump includes a pump housing (10) having upper and lower cylindrical, partly liquid filled, compression chambers (11 and 12 respectively) which are separated from each other and in which an upper and a lower part (14, 15) of a piston (12) is movable. The piston has a passage (21) which is provided with a check valve and which provides communication between the upper and the lower chamber (11 and 12 respectively). The upper chamber communicates, via an opening (26) which is provided with a check valve, with a liquid filled de-aeration receptacle (27). The lower chamber (12), during a part of the movement of the piston, via an inlet (33), communicates with the space being evacuated.
    Type: Grant
    Filed: September 1, 1993
    Date of Patent: October 25, 1994
    Assignee: Electrolux Research & Innovation Aktiebolag
    Inventor: Anders Haegermarck