Brake pressure control device for vehicles
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 5, 1991
Issued Date -
N/A
app pub date -
Apr 28, 1989
filing date -
Sep 4, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A brake pressure control device introduces pump pressure which is produced by a pump (16) into piping which connects a master cylinder (4) and wheel brakes (11, 11', 12, 12'). The increase, decrease and retention of the wheel brake pressure are effected by utilizing the pump pressure. Absorbers (19, 19') which consume hydraulic fluid are installed in branches from piping which connects the master cylinder (4) and the wheel brakes (11, 11', 12, 12'). 4-port 2-position control valves (5, 5') are installed in the hydraulic passages which connect the master cylinder (4) and the absorbers (19, 19') and at the inlet port for the pump pressure and at the outlet port to the absorbers (19, 19'). The 4-port 2-position control valves (5, 5') selectively switch the hydraulic passages in such a manner that when the pump pressure is normal, they render conductive the hydraulic passage which connects the master cylinder (4) and absorbers (19, 19') but when the pump pressure fails and thereby decreases, they render conductive the hydraulic passage which connects the master cylinder (4) and wheel brakes (11, 11', 12, 12').
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully