Tensioning devices
AssigneeBorg-Warner Corporation
InventorsAlan G. King, Keith Hunt
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 spring loaded cam block 5. A catch disc 9 and rod 8 arrangement is provided to prevent return movement of the spring loaded block and hence collapse of the arm 3 under load reversals of the chain.
Claims12
A tensioning device for an endless driving element, comprising a rod, a pivotal arm, an actuator slidably mounted on said rod, compression spring means biasing said actuator in one direction along said rod, 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 actuator against said spring bias along said rod, as would be caused upon return pivotal movement of said arm, by which to inhibit said return movement of said actuator and hence said return pivotal movement of said arm, and means carried by said pivoted arm to engage said endless driving element.
A tensioning device as claimed in claim 4, wherein said actuator has an angled face adjacent said catch disc such as to effect said tilting of said catch disc into said binding engagement with said rod in response to said return movement of said actuator.
A tensioning device as claimed in claim 5, wherein said catch disc is positioned in a recess on said actuator, said recess being defined by a pair of walls, said angled face defining one of said walls of said recess, said compression spring extending through the other wall of said recess to impart its spring bias direct to said catch disc and thence to said actuator.
Dependencies are inferred from the claim text.