Drive device operated by a pressure fluid
OwnerGeorg Hirmanninventor
Life of this patent
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Abstract
In a drive device operated by pressure fluid a progressive linear or swinging or rotary movement of a driven element is produced by means of at least one lifting element. Between the lifting element and the driven element there is arranged at least one wedge which carries out a stepwise reciprocating movement under the influence of the lifting element. In this way the driven element is pushed forward step by step in the loaded direction via a force locking. This drive device permits a force-locked connection to the object to be moved.
Claims13
A step motion drive device operating by fluid pressure which provides relative unidirectional stepping movement between the device and a driven element, comprising at least one fluid-actuated expansible member, a force transmitting member which is displaced by said expansible member, a linearly displaceable direction-translating member in the form of a wedge through which said force transmitting member operates, and means for biasing the wedge in the opposite direction of said stepping movement, whereby said wedge is non-positively connected to said driven member and expansion and contraction by said expansible member due to fluctuations in said fluid pressure causes reciprocal linear displacement of the force transmitting member and a corresponding reciprocal movement of the wedge, the latter causing a step-wise unidirectional displacement of the driven member by means of a frictional non-positive connection therewith.
Dependencies are inferred from the claim text.