IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
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출원번호 |
US-0040512
(1998-03-17)
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발명자
/ 주소 |
- Lee Kin Bong
- Lee Steven K.
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인용정보 |
피인용 횟수 :
8 인용 특허 :
16 |
초록
▼
Apparatus for bleeding and refilling hydraulic brake system, particularly, automotive hydraulic brake system, includes a bleeding unit and a refilling unit. The bleeding unit comprises a peristaltic pump having an inlet and an outlet tubing for removing brake fluid and entrapped air in a hydraulic s
Apparatus for bleeding and refilling hydraulic brake system, particularly, automotive hydraulic brake system, includes a bleeding unit and a refilling unit. The bleeding unit comprises a peristaltic pump having an inlet and an outlet tubing for removing brake fluid and entrapped air in a hydraulic system. A collection container is provided for holding the brake fluid removed. A first electronic timer operates the pump for a predetermined length of time. An opto-sensor attached to the inlet tubing serves as an air bubble detector, on each air bubble detected, a signal is issued to start a second electronic timer which operates the pump for an additional predetermined length of time simultaneously with the first timer. When the first timer almost reaches resetting, each air bubbles detected, thereafter, will trigger the second timer to operate the pump until no more air bubbles are detected. The output signal from the opto-sensor also activates a LED and an electronic beeper to indicate the presence of each air bubble. A bleeder valve adapter is provided for preventing air leak past the threads of the bleeder valve during bleeding. The refilling unit includes a peristaltic pump having an inlet and an outlet tubing for delivering new brake fluid to a master cylinder reservoir. An electronic timer operates the pump for a predetermined length of time so as to prime the refilling unit before refilling. A first capacitive proximity sensor serving as a fluid level controller is clamped together with the outlet tubing to the master cylinder reservoir by a reservoir clamp. A second capacitive proximity sensor serving as a flow detector is attached to the inlet tubing. When flow interruption such as air or low new brake fluid level is detected, the second capacitive proximity sensor outputs a signal to light a LED and to activate an electronic beeper to indicate flow interruption. A LED controlled by the first capacitive proximity sensor is used to indicate the new brake fluid level in the master cylinder reservoir during bleeding. A collection container is provided for holding the brake fluid removed during priming of the refilling unit.
대표청구항
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[ We claim:] [1.] Apparatus for bleeding and refilling hydraulic brake system includes a bleeding unit and a refilling unit, the bleeding unit, comprising:a) a bleeder valve adapter made of rubber, in the shape of an cylindrical body having an axial passageway dimensioned to enclose a bleeder valve
[ We claim:] [1.] Apparatus for bleeding and refilling hydraulic brake system includes a bleeding unit and a refilling unit, the bleeding unit, comprising:a) a bleeder valve adapter made of rubber, in the shape of an cylindrical body having an axial passageway dimensioned to enclose a bleeder valve and a short length of flexible hose at one end and terminating in conical shape at the other end, during bleeding an automotive brake caliper, said adapter is to be pushed over the bleeder valve so as to enclose the valve completely, a hose clamp is used to tighten said adapter to the hex nut of the bleeder valve, and said adapter is further tightened towards the brake caliper, providing sealing means for preventing air leak past the threads of the bleeder valve,b) a first electronic circuit board provides means for operating the bleeding unit,c) a first peristaltic pump having an inlet tubing and an outlet tubing, provides suction means for removing brake fluid and entrapped air in the hydraulic system,d) a first electronic timer provides means for operating said first pump for a predetermined length of time in each bleeding sequence,e) an opto-sensor disposed at the inlet tubing, provides means for detecting entrapped air bubbles in a hydraulic system and to output a signal on each air bubble detected,f) a second electronic timer operated by the output signal of said opto-sensor, provides means for operating said first pump for an additional amount of predetermined length of time on each air bubble detected,g) a first LED controlled by the signal of said opto-sensor, provides means for displaying the presence of each air bubble detected,h) a first electronic beeper operated by the signal of said opto-sensor, provides means for producing audible signals to indicate each air bubble detected,i) a first collection container mounted on the side of the bleeding unit, provides means for holding brake fluid removed during bleeding, refilling unit, comprising:j) a second electronic circuit board provides means for operating the refilling unit,k) a second peristaltic pump having an inlet and an outlet tubing, provides suction means for refilling a master reservoir with new brake fluid during bleeding,l) a third electronic timer provides means for operating said second pump for a predetermined length of time so as to prime the refilling unit before refilling,m) a first capacitive proximity sensor holding by a reservoir clamp and operatively connected to said second pump, provides means for detecting brake fluid level so as to maintain the brake fluid level in a master cylinder reservoir during bleeding,n) a second capacitive proximity sensor disposed at the inlet tubing, provides means for producing signals to indicate flow interruption of new brake fluid to a master cylinder reservoir caused by entrapped air or low fluid level,o) a second LED controlled by the output signal of said second sensor, provides means for indicating flow interruption,p) a second electronic beeper operated by the output signal of said second sensor provides means for producing audible signals to indicate flow interruption,q) a third LED controlled by the output signal of said first capacitive proximity sensor, provides means for indicating the brake fluid level in a master cylinder reservoir during bleeding,r) a second collection container mounted on the side of the refilling unit, provides means for holding brake fluid removed during priming of the refilling unit, reby the flashing of said first LED and beeping signals from said first electronic beeper indicate each air bubble is being removed, and each air bubble while being removed extends the operating time of said first pump so that said first pump will continue to run until no more air bubbles are detected, resulting that a hydraulic brake system is bled automatically, and reby a master cylinder reservoir is automatically refilled during bleeding, in combination, the bleeding unit and the refilling unit of the present invention bleeds and refills automotive hydraulic brake systems conveniently, efficiently and automatically.
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