Chain ring protector
OwnerJames K. Rogersinventor
Life of this patent
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Abstract
A chain ring protector having a substantially planar mounting bracket operably secured to the bottom bracket sleeve of a vehicle with a durable semi-circumferential guard extending therefrom is disclosed. The durable guard has a substantially arcuate outer edge sized to approximate the outer diameter of a chain ring, and it is operably secured to the planar mounting bracket such that the outer edge extends slightly beyond the outer diameter of the portion of the chain ring extending below the bottom bracket sleeve.
Claims20
A chain ring protector for a vehicle having a frame with a lower bracket sleeve thereon and a lower bracket spindle operably secured thereto, the spindle pivotally securing a chain ring to the frame, the chain ring defining an outer radius with a portion of the chain ring extending below the lower bracket sleeve, said chain ring protector comprising:
- a substantially planar mounting bracket portion secured to the lower bracket sleeve such that the substantially planar mounting bracket remains fixed with respect to the frame while the chain ring pivots;
- and,
- a semi-circumferential guard portion extending from the substantially planar mount bracket portion adjacent to the chain ring and aligned with the portion of the chain ring extending below the lower bracket sleeve, an outer edge of said guard portion extending past the outer radius the chain ring so as to protect the portion of the chain ring extending below the lower bracket sleeve from inadvertent impacts.
A bicycle comprising:
- a frame having a lower bracket sleeve thereon,
- forward and aft wheels operably secured to said frame,
- handle bars operably engaging said forward wheel and operably secured to said frame;
- a lower bracket spindle having a pivoting shaft therein, said spindle detachably received though said lower bracket sleeve, said shaft having first and second ends;
- a left crank secured to said first end of said shaft;
- a right crank secured to said second end of said shaft;
- a substantially planar sprocket operably secured to said shaft, for driving said aft wheel by rotation of said sprocket, a portion of said sprocket extending below said lower bracket sleeve by a defined distance;
- a substantially planar mounting bracket portion secured to the lower bracket sleeve such that the substantially planar mounting bracket remains fixed with respect to the frame while the sprocket rotates about said shaft;
- and,
- a semi-circumferential guard portion extending from the substantially planar mount bracket portion adjacent to the chain ring by a length greater than said defined distance, said semi-circumferential guard portion substantially aligned with said portion of said sprocket extending below said lower bracket sleeve.
Dependencies are inferred from the claim text.