Motors: expansible chamber type – With correlated control of motive fluid and locking means
Patent
1986-09-05
1988-02-16
Look, Edward K.
Motors: expansible chamber type
With correlated control of motive fluid and locking means
188 718, 188196A, 188351, F15B 1526
Patent
active
047247410
ABSTRACT:
Spring-loaded cylinder with a tension piston (7) which can be pressurized by a pressure medium. Between the tension piston (7) and a piston rod (3) movable thereby, a cylinder-piston arrangement (19, 20, 21) is installed, whose cylinder chamber (21) can be pressurized from the pressurization chamber (10) of the tension piston (7) via a sealing ring (18), constituting a reflux valve. A first axial friction coupling (17, 18) is provided between the tension piston (7) and the piston rod (3) and a second friction coupling (13, 14) between a housing section (1) and the piston rod (3). The second friction coupling (13, 14) has a buffer clearance A, corresponding to the nominal application stroke. The friction force of the first friction coupling (17, 16) is greater than the expansion force of the cylinder-piston arrangement (19, 20, 21), and the friction force of the second friction coupling (13, 14) is greater than the friction force of the first friction coupling (17, 16) reduced by the expansion force. The cylinder chamber (21) of the cylinder-piston arrangement (19, 20, 21) can be randomly emptied into the pressurizing chamber (10) of the tension piston (7).
REFERENCES:
patent: 2988058 (1961-06-01), Warnecke
patent: 3118520 (1964-01-01), Tjernstrom
patent: 3586138 (1971-06-01), Engle
patent: 4214795 (1980-07-01), Kakuminato
Knorr-Bremse AG
Look Edward K.
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