Expansible chamber devices – With fluid purifying means
Patent
1982-06-28
1984-11-06
Maslousky, Paul E.
Expansible chamber devices
With fluid purifying means
92 63, 92 86, 92114, 92169, 403326, F01B 3100, F15B 2104, F16J 1002
Patent
active
044805306
ABSTRACT:
The invention pertains to vehicle brake actuators of the expansible motor type wherein the actuator includes a cylinder having a piston and piston rod assembly reciprocal therein, a helical spring biases the piston in a braking direction, and a pressurized medium, such as hydraulic fluid, forces the piston in a spring compressing direction. The unique features include a piston drawn from sheet metal wherein the piston rod is pressed thereinto, and the piston seals are retained in position by a wire ring having an interference fit with the piston. Additionally, novelty resides in the use of a retainer formed of wire or of stamped construction having protuberances defined thereon for retaining the cylinder end cap upon the cylinder in a manner to permit ease and safety of assembly, and uniform force distribution. Further, an embodiment is disclosed having a permanently mounted piston retractor wherein a removable insert is employed therewith to hold the piston rod in a retracted position during shipping and installation, and is removed during normal operation of the brake actuator.
REFERENCES:
patent: 1698087 (1929-01-01), Field
patent: 2854954 (1958-10-01), Howze
patent: 3136227 (1964-06-01), Williams
patent: 3495503 (1970-02-01), Gummer et al.
patent: 3508470 (1970-04-01), Swander, Jr. et al.
patent: 3572162 (1971-03-01), Gresham et al.
patent: 3717072 (1973-02-01), Kaltenthaler et al.
patent: 3977308 (1976-08-01), Swander, Jr. et al.
patent: 4247147 (1981-01-01), Rettowski
Aeroquip Corporation-Bulletin 8153-Maxibrake "R" Spring Brake-4 pages-Copyrighted 1979.
Aeroquip Corporation
Maslousky Paul E.
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