Expansible chamber devices – Mutually relatively movable cylinder or sleeve – member...
Patent
1989-01-27
1990-06-26
Garrett, Robert E.
Expansible chamber devices
Mutually relatively movable cylinder or sleeve, member...
92 52, 92 53, 91167R, 91167A, 220 8, 384 15, F01B 720
Patent
active
049361937
ABSTRACT:
The present invention provides a protective device for a working member, such as the piston rod of a piston and cylinder actuator, which is arranged at least partly in a receiving member and is able to be moved and more especially slid, along a curved or straight path so that it projects to a greater or lesser extent out of the receiving member. The device is provided with a plurality of sleeve-like guard sections which surround the working member projecting out of the receiving member along the full length of the working member so that whatever the position of the latter any two adjacent guard sections overlap each other and are able to be slid in relation to each other, one of said guard sections being stationarily arranged on the receiving member and another guard section being arranged on the working member so as to move therewith so that in accordance with the actual axial extent of the part of the member to be protected the sections are telescoped into each other to a greater or lesser extent.
REFERENCES:
patent: 4449724 (1984-05-01), Ahn
patent: 4522246 (1985-06-01), Bierbrauer
V. M. Shults, "Improving Slideway Protection Devices", Stankii Instrument, vol. 45, Issue 5, 1974, pp. 17-18, (Machines & Tooling) Publication.
Festo KG
Garrett Robert E.
Stephan F. H.
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