Tensioning devices
AssigneeBorg-Warner Corporation
InventorAlan G. King
Life of this patent
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Abstract
A chain tensioning device comprises a pair of arms 2, 3 which are pivoted together and urged apart, so that the arm 3 applies a tensioning force to a chain, by means of a block 9 biased by a compression spring 10 axially along the arm 2 in conjunction with links 14 coupled between the block 9 and the arm 3 and serving to pivot the arm 3 relative to the arm 2, in response to such spring biased axial movement of the block 9. A catch disc 12 and rod 6 arrangement is provided to prevent return movement of the spring loaded block 9 and hence collapse of the arm 3 under load reversals of the chain.
Claims9
A tensioning device for an endless driving element, comprising a pivoted arm, a rod, an actuator slidably mounted on said rod, compression spring means mounted about said rod and biasing said actuator in one axial direction along said rod, link means coupled between said actuator and said pivoted arm by which to convert axial movement of said actuator into pivotal movement of said arm, and vice versa, said arm being caused to pivot in a tensioning sense in response to spring biased movement of said actuator in said one direction, a catch disc mounted on said rod and tiltable into binding engagement therewith in response to return movement of said arm, by which to inhibit said return movement of said actuator and hence said return pivotal movement of said arm, and a shoe adapted to directly engage the endless driving element and connected to said pivoted arm.
Dependencies are inferred from the claim text.