Flexure-pivot assemblies and methods of making them

Details Flexure-pivot assemblies and methods of making them Flexure-pivot assemblies and methods of making them

G - Physics

01

C

79/14, 26/180

G01C 19/16 (2006.01) F16C 11/12 (2006.01) F16F 1/14 (2006.01)

Patent

CA 1052601

Abstract Flexure-pivots for providing a resilient restraint that opposes relative angular displacement between two members are known in which the resilient restraint is provided by two flat springs which are each held at one of its ends to a first rotatable sleeve carried by one member and at the other end to a second rotatable sleeve coaxial with the first and carried by the other member. Such flexure-pivots are difficult to manufacture accurately and have the disadvantage in that any debris accumulating between the sleeves can cause friction between the members and damage to the assembly. According to one aspect of this invention pairs of pins are carried by both members and each spring is secured at one of its ends between a pair of pins of one member and at its other end between a pair of pins at the other member. According to another aspect of this invention the flexure-pivot is manufactured by securing four pairs of pins at one end to one member, securing each spring at each end between a pair of pins, securing the four pairs of pins at their other ends to the other member, and cutting through each pair of pins such that each spring is secured at one of its ends between a pair of pins of one member and at its other end between a pair of pins of the other memeber. Such flexure-pivots require only component parts that can be manufactured simply, produce an accurate location of the springs, and have an open form of construction which prevents any build up of dirt or debris in the flexure-pivot during manufacture or use.

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