Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1982-02-11
1985-09-24
Hershkovitz, Abraham
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
92 94, 92 99, 92169, F15B 910
Patent
active
045426805
ABSTRACT:
The diaphragm of a vacuum booster device is normally placed in intimate contact with the disc portion of the booster piston due to the pressure difference between the first and second working chambers. The diaphragm has through-holes which the tie rods penetrate, and the peripheral portion of each through-hole is resiliently pushed to the disc portion of the booster piston by means of an elastic member. When the booster piston is manually operated while no vacuum pressure is stored in the first working chamber, the air in the first working chamber compressed by the advance of the booster piston is discharged into the second working chamber through the through-hole of the diaphragm, thus insuring smooth manual operation of the booster piston. When vacuum pressure is stored in the first working chamber, the peripheral portion of the through-hole of the diaphragm is resiliently pushed to the disc portion of the booster piston by the elastic member, thereby reliably closing the through-hole of the diaphragm and preventing unnecessary leakage of the vacuum pressure from the first working chamber to the second working chamber.
REFERENCES:
patent: 3543298 (1970-11-01), Rockwell
patent: 3688647 (1972-09-01), Kytta
patent: 3921501 (1975-11-01), Rosback
patent: 4245845 (1981-01-01), Ando
patent: 4292887 (1981-10-01), Ohta
patent: 4325218 (1982-04-01), Weiler
patent: 4328738 (1982-05-01), Hamamatsu
patent: 4334459 (1982-06-01), Riedel
patent: 4377966 (1983-03-01), Parker
patent: 4398449 (1983-08-01), Takayama
patent: 4399735 (1983-08-01), Katagiri
patent: 4428274 (1984-01-01), Takeuchi
Hershkovitz Abraham
Nissan Kogyo Kabushiki Kaisha
LandOfFree
Vacuum booster device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vacuum booster device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vacuum booster device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1608648