Portable rail cutting apparatus
AssigneeThe Stanley Works
InventorStephen E. Crover
Life of this patent
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Abstract
A portable rail cutting apparatus is presented herein. The portable rail cutting apparatus comprises a housing encasing a motor, the motor configured to drive a rotary abrasive blade, a drive pulley coupled to the motor, a driven pulley coupled to the rotary abrasive blade, a loop drive belt engaged by the drive pulley at one end and engaging the driven pulley at another end, and an automatic belt tensioning mechanism. The automatic belt tensioning system comprises a spring and push rod assembly that applies a pre-set tension to the loop drive belt. The portable rail cutting apparatus may also comprise an adjustable protective guard member that partially surrounds the rotary abrasive blade and includes a detent mechanism configured to provide integral travel positions for the adjustable protective guard member.
Claims9
A portable rail cutting apparatus, comprising:
- a housing encasing a motor, said motor configured to drive a rotary abrasive blade;
- a drive pulley coupled to said motor;
- a driven pulley coupled to said rotary abrasive blade;
- a loop drive belt engaged by said drive pulley and by said driven pulley;
- and
- an adjustable protective guard member, partially surrounding said rotary abrasive blade, that includes a detent mechanism configured to provide integral travel positions for said adjustable protective guard member, said detent mechanism containing a series of first locking elements defining said integral travel positions and a spring-actuated second lock structure,
- wherein said detent mechanism is disposed proximate to a periphery of said adjustable protective guard member, and
- wherein said spring-actuated second lock structure is movable into a locking position wherein it engages one of said first locking elements to lock said adjustable protective guard member into one of said integral travel positions and movable into a releasing position wherein it is enabling the adjustment of said protective guard member.
A hand-operated rail cutting apparatus, comprising:
- a housing encasing a motor, said motor configured to drive a rotary abrasive blade;
- a drive pulley coupled to said motor;
- a driven pulley coupled to said rotary abrasive blade;
- a loop drive belt engaged by said drive pulley at one end and engaging said driven pulley at another end;
- an automatic belt tensioning mechanism containing a spring and push rod assembly to apply a pre-set tension to said loop drive belt, said spring and push rod assembly disposed at a location off-center between said drive pulley and said driven pulley;
- an adjustable protective guard member partially surrounding said rotary abrasive blade, said adjustable protective guard member including a detent mechanism configured to provide integral travel positions for said adjustable protective guard member, said detent mechanism containing a slot, disposed proximate to a periphery of said adjustable protective guard member, having a series of apertures defining said integral travel positions and a spring-actuated knob piston,
- wherein said spring-actuated knob piston engages one of said apertures to lock said adjustable protective guard member into one of said integral travel positions and depressing said spring-actuated knob piston disengages said spring-actuated knob piston enabling the adjustment of said protective guard member.
Dependencies are inferred from the claim text.