Fluid actuator including a composite piston rod

Details Fluid actuator including a composite piston rod Fluid actuator including a composite piston rod

1986-03-28

1988-10-18

Garrett, Robert E.

Expansible chamber devices

Piston

Nonmetallic portion

92255, 138 31, 291565A, F16J 900

Patent

active

047778695

ABSTRACT:
Fluid actuator includes a piston rod comprised of a wound filamentary composite structure to provide an extremely light weight, relatively low cost, envelope efficient design. Attached to the piston rod are one or more non-integral piston heads which are preloaded against one or more ramp surfaces on the exterior of said piston rod. A pair of oppositely facing ramp surfaces may be formed on the piston rod by interspersing filler means between the piston rod fiber layers. Another ramp area may be formed by providing an external groove in the piston rod which is engaged by longitudinally split support shoes that provide an attachment surface for a detachable piston head. An internal ramp may also be provided on the inner diameter of the piston rod adjacent the axial outer end thereof for mating engagement by a conically ramped exterior surface on an internal metal stud used to attach a rod end assembly to the axial outer end of the piston rod. The internal ramp may be formed by radially displacing the layers of piston rod fibers radially inward by interspersing circumferential fiber windings therebetween.

REFERENCES:
patent: 2853319 (1958-09-01), Press
patent: 3040712 (1962-06-01), Harrah
patent: 3326092 (1967-06-01), Murphy
patent: 3333778 (1967-08-01), Levenetz et al.
patent: 3698264 (1972-10-01), York
patent: 3783620 (1974-01-01), Moe
patent: 4211589 (1980-07-01), Fisher et al.
patent: 4272971 (1981-06-01), Loyd et al.
patent: 4315454 (1982-02-01), Knodel
patent: 4329915 (1982-05-01), Schulz

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