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US 5,012,582 AGranted
Hand-held, battery-operated rotary blade saw
AssigneeBristol and Williams
InventorsSteven L. Bristol, Joseph D. Casanueva
Life of this patent
Estimating the term…
Abstract
A hand-held, battery-operated rotary blade saw useful for cutting plastic clips or straps which secure a face mask to a football helmet. Several configurations, having differing safety shields, are disclosed. The device is an emergency/rescue tool to quickly remove a face mask from a football helmet allowing access to the face of a football player without removal of the helmet with its concomitant risk of cervical injury.
Claims4
A hand-held, battery operated rotary blade saw comprising:
- a housing,
- batteries contained within said housing,
- an electro-mechanical on-off switch,
- a battery operated motor contained within said housing,
- electrical connections between the said batteries and said motor through said electro-mechanical switch,
- a rotor shaft extending out of said motor through said housing,
- a rotary saw blade attached to said rotor shaft, and
- a removable rotary saw blade shield which protects the rotary saw blade from inadvertent contact with objects exterior to the device;
- wherein:
- the exterior of said housing serves as a handle, and the surface of said housing provides a detachable housing access cover;
- and
- said removeable rotary saw blade shield comprises:
- a blade cover which is hollow and cylindrical in shape and provides both a blade cover male connector and a blade cover female connector.
10 more elements
Dependencies are inferred from the claim text.