Brakes – Internal-resistance motion retarder – Controlled by an operator remote from retarder
Patent
1987-06-15
1989-03-21
Graham, Matthew C.
Brakes
Internal-resistance motion retarder
Controlled by an operator remote from retarder
188282, 188285, 18832215, 267 6415, B60G 1700, B60G 1126
Patent
active
048135194
ABSTRACT:
A cylinder piston apparatus according to the present invention comprises a cylinder housing having an oil chamber therein, and a rod fitted in the cylinder housing. A piston-shaped partition member is arranged in the cylinder assembly. The oil chamber is divided into first and second oil chambers by the partition member. The partition member is provided with a valve housing, which has an outside circulation hole capable of communicating with the second oil chamber. A rotary valve is fitted in the valve housing. The valve has an inside circulation hole, which is situated at a position corresponding to the outside circulation hole, and can communicate with the first oil chamber. A stepping motor for driving the rotary valve is housed in a motor-holding chamber which is defined inside the cylinder assembly. The motor-holding chamber is filled with oil, so that the motor is immersed in the oil.
REFERENCES:
patent: 3399905 (1968-09-01), Vogel
patent: 3559776 (1971-02-01), Schultze
patent: 3627348 (1971-12-01), Klees
patent: 4061295 (1977-12-01), Somm
patent: 4334600 (1982-06-01), Palitto
patent: 4491207 (1985-11-01), Boonchanta et al.
patent: 4527676 (1985-07-01), Emura et al.
patent: 4555126 (1985-11-01), Ishimitsu et al.
patent: 4620619 (1986-11-01), Emura et al.
Fukumura Takeo
Matsubara Kousuke
Graham Matthew C.
Kashnikow Andres
NHK Spring Co. Ltd.
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