Mechanism for transferring movements between first and second linearly displaceable bodies
First Claim
1. A mechanism for transferring movements between first and second linearly displaceable bodies, such as pistons or displacers, said mechanism comprising a connecting member having first, second and third pivots defining first, second and third vertices of a triangle with fixed side lengths, a rotary device, such as a crank or an eccentric, connected to the first pivot of the connecting member for rotating said first pivot about a fixed axis, the second pivot of the connecting member being connected to said first displaceable body through an elongated body connector, and a two-armed lever having a fixed fulcrum and having a first arm connected directly to the connecting member by said third pivot and a second arm pivotally connected to said second, linearly displaceable body through a second elongated body connector.
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Accused Products
Abstract
A mechanism for transferring movement between two reciprocating bodies, such as pistons or displacers (10, 11) comprises a crank or eccentric (12) and may be included in a Stirling or Vuilleumier engine. The crank or eccentric is connected to a connecting member (13) by means of a bearing or pivot (D). The connecting member (13) is connected to one (10) of the pistons or displacers via a second pivot (X) and to one arm (16) of a lever (15) by means of a third pivot (A). The pivots (A, D, X) of the connecting member (13) defines the vertices of a triangle. The other arm (17) of the lever (15) is pivotally connected to the other piston or displacer (11).
The arms (16, 17) of the lever (15) may define an angle therebetween, and this angle may be selected so as to obtain a desired angle between the directions of the movements of the pistons, for example an angle of 90°. It is also possible to obtain a desired phase angle between the movements of the pistons and desired lengths of the piston strokes by suitably dimensioning other parts of the mechanism.
7 Citations
14 Claims
- 1. A mechanism for transferring movements between first and second linearly displaceable bodies, such as pistons or displacers, said mechanism comprising a connecting member having first, second and third pivots defining first, second and third vertices of a triangle with fixed side lengths, a rotary device, such as a crank or an eccentric, connected to the first pivot of the connecting member for rotating said first pivot about a fixed axis, the second pivot of the connecting member being connected to said first displaceable body through an elongated body connector, and a two-armed lever having a fixed fulcrum and having a first arm connected directly to the connecting member by said third pivot and a second arm pivotally connected to said second, linearly displaceable body through a second elongated body connector.
Specification