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The trailing, load supporting component of a product conveyor is connected to a powered, leading component by a shock absorbing tow bar that employs relatively movable friction elements in a sandwich configuration to absorb the shock by sliding engagement at internal wear surfaces. A brake tongue sl

The trailing, load supporting component of a product conveyor is connected to a powered, leading component by a shock absorbing tow bar that employs relatively movable friction elements in a sandwich configuration to absorb the shock by sliding engagement at internal wear surfaces. A brake tongue slides between opposed brake pads of the sandwich which are placed under pressure against the tongue. A two-piece, telescoping tubular housing shields the brake assembly from contaminants and enhances the structural integrity of the unit.

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The trailing, load supporting component of a product conveyor is connected to a powered, leading component by a shock absorbing tow bar that employs relatively movable friction elements in a sandwich configuration to absorb the shock by sliding engagement at internal wear surfaces. A brake tongue sl

The trailing, load supporting component of a product conveyor is connected to a powered, leading component by a shock absorbing tow bar that employs relatively movable friction elements in a sandwich configuration to absorb the shock by sliding engagement at internal wear surfaces. A brake tongue slides between opposed brake pads of the sandwich which are placed under pressure against the tongue. A two-piece, telescoping tubular housing shields the brake assembly from contaminants and enhances the structural integrity of the unit. ting bushing; a handle connected to said shaft for rotating said shaft; wherein a compression force on said spring varies as a distance between said mounting nut and said handle varies; a housing positioned between said mounting bushing and said mounting nut for enclosing said spring, said housing comprised of first and second telescoping portions, said housing positioned such that said laterally extending bore of said mounting bushing is exposed; wherein said mounting bushing is connected to said frame via its laterally extending bore; and wherein said mounting nut is connected to said drive mount. 5. The apparatus of claim 4 wherein said tensioner assembly further includes: a seal positioned between the mounting bushing and the shaft. 6. A band saw apparatus including a blade under tension, comprising: a frame; a drive mount including a first portion pivotably connected to said frame; a rotatable wheel supported by said drive mount and movable therewith, the blade extending about said rotatable wheel; a tensioner assembly including: a mounting bushing having an opening therethrough aligned with a longitudinal axis of the tensioner, the mounting bushing including at least one laterally extending bore; a shaft having at least one threaded region along its axial length, said shaft extending through said opening in said mounting bushing and sized for movement of said shaft through said opening; a mounting nut threaded onto said threaded region of said shaft and spaced from said mounting bushing, said mounting nut and said shaft being rotatable relative to one another to cause a corresponding relative axial movement between said mounting nut and said shaft, said mounting nut including at least one laterally extending bore; a spring disposed around said shaft and positioned between said mounting bushing and said mounting nut, a first end of said spring positioned against a stationary seating surface that is in a fixed position along said shaft and that is located intermediate said mounting bushing and said mounting nut such that said first end of said spring is spaced from said mounting nut, a second end of said spring positioned against a first side of said mounting bushing; and a handle connected to said shaft and positioned to a second side of said mounting bushing for rotating said shaft; wherein said mounting bushing is connected to said frame via its laterally extending bore; and wherein said mounting nut is connected to said drive mount via its laterally extending bore. 7. The apparatus of claim 6 wherein said tensioner assembly further includes: a seal positioned between the mounting bushing and the shaft. 8. A band saw apparatus including a blade under tension, comprising: a frame; a drive mount including a first portion pivotably connected to said frame; a rotatable wheel supported by said drive mount and movable therewith, the blade extending about said rotatable wheel; a tensioner assembly including: a mounting bushing having an opening therethrough aligned with a longitudinal axis of the tensioner, the mounting bushing including at least one laterally extending bore; a shaft having at least one threaded region along its axial length, said shaft extending through said opening in said mounting bushing and sized for movement of said shaft within said opening; a mounting nut threaded onto said threaded region of said shaft and spaced from said mounting bushing, said mounting nut including at least one laterally extending bore; a seating surface extending from said shaft at a position intermediate said mounting bushing and said mounting nut; a spring disposed around said shaft and positioned between said mounting bushing and said seating surface, a first end of said spring positioned against said seating surface that is in a fixed position so as to be fixed at said intermediate position along said shaft regardless of a distance between said mounting bushing and said mounting n