Brakes – Internal-resistance motion retarder – With means for locking parts together temporarily
Patent
1996-04-02
1997-03-25
Oberleitner, Robert J.
Brakes
Internal-resistance motion retarder
With means for locking parts together temporarily
267202, F16F 932
Patent
active
056135807
ABSTRACT:
A plurality of embodiments of dual-rate linear dampers which can be utilized as hold open rods. These dampers provide significantly greater resistance to movement in one direction than in the other and, in the claimed embodiment, effectively lock in the hold open position unless and until the design breakover force is incurred. A second spring causes axial compression and, hence, radial bulging, of a first spring causing a inner cylindrical member to be locked in position relative to an outer cylindrical housing. An actuator includes a first rod that extends through the inner cylindrical member, and a second rod portion that is biased by a third spring to a non-engaging position relative to the first rod. A laterally extending lever can be manually engaged to overcome the bias of the second and third springs to unload the first spring significantly reducing the resistance force enabling the relative positions of the inner and outer cylindrical members to be adjusted.
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Bartz C. T.
Lord Corporation
Oberleitner Robert J.
Thomson Richard K.
Wayland Randall S.
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