Movable backup bar assembly
AssigneeJervis B. Webb Company
InventorsChristopher A. Hook, Ronald L. Bailey
Life of this patent
Estimating the term…
Abstract
A movable backup bar assembly includes an endless drive chain, a sprocket or the like for coupling the drive chain to the power source, and a backup bar for guiding the drive chain. The assembly has two positions: a first position for holding the drive chain in engagement with the chain to be driven and a second position for holding the drive chain away from the driven chain. An actuator is provided for positively shifting the assembly between these two positions.
Claims17
In a drive chain assembly for transferring power from a power source to a driven chain, said assembly comprising an endless drive chain, sprocket means for coupling said drive chain to the power source, a backup bar for guiding said drive chain, an actuator connected to said backup bar for selectively biasing said backup bar against said drive chain, said actuator being mounted to slide between a first predetermined position where the actuator is moved to properly engage the drive chain with the driven chain and a second predetermined position where the actuator is moved to properly disengage the drive chain with the driven chain, and said actuator having a first indicating member for indicating the location of the first predetermined position and a second indicating member for indicating the location of the second predetermined position, whereby an operator can operate the backup bar assembly by moving the actuator directly between the first and second indicating members.
A backup bar assembly for engaging a drive chain with a driven chain, the backup bar assembly comprising a backup bar, a backup bar support, an actuator for shifting said backup bar and backup bar support, said actuator being mounted to slide between a predetermined first position where the actuator is moved to properly engages the drive chain with the drive chain and a second predetermined position where the actuator is moved to properly disengage the drive chain with the driven chain, and first and second indicating members for indicting the locations of the first and second predetermined position respectively, whereby an operator can operate the backup bar assembly by moving the actuator directly between the first and second indicating members.
A drive chain assembly for transferring power from a power source to a driven chain, said assembly comprising:
- a housing;
- a first shaft having an axis and supported in said housing for rotation about said first shaft axis;
- a second shaft having an axis and supported in said housing for rotation about said second shaft axis;
- a power source supported by said housing fox rotating it least one of said first and second shafts;
- a first sprocket supported on said first shaft for rotation about said first shaft axis;
- a second sprocket supported on said second shaft for rotation about said second shaft axis;
- an endless drive chain supported by said first and second sprockets for rotation thereabout;
- a backup bar support connected to said housing and comprising a first wall and a second wall spaced apart from and generally parallel to said first wall, said second wall adapted to engage said drive chain;
- a backup bar connected to said backup bar support first wall;
- a lockable push/pull clamp connected between said backup bar support and said housing for moving said backup bar between a first predetermined position where the actuator is moved so that said backup bar is held against said drive chain properly engage the drive chain with the driven chain and a second predetermined position where said second wall is held against said drive chain;
- and
- first and second indicating members for indicting the locations of the first and second predetermined positions respectively, whereby an operator can operate the backup bar assembly by moving the actuator directly between the first and second indicating members.
Dependencies are inferred from the claim text.