Rotary cutter wheel
OwnerHiroaki Okinagainventor
Life of this patent
Estimating the term…
Abstract
By rotating at a high speed a cutter wheel having air intake ports and air injection ports which communicate through an inner cavity, surrounding air is introduced into the cavity from the air intake ports and discharged out through the air injection ports by the centrifugal force brought about by the rotation of the cutter wheel, to spontaneously induce a strong current of air. In this manner, cutting bits which are attached to the peripheral portion of the cutter wheel and produce superheat in cutting a rigid material such as concrete are effectively cooled by the air current thus induced.
Claims20
A rotary cutter wheel comprising:
- a cutter base formed of two mutually abutting parallel substantially disc-shaped plates, said cutter base having a radially inner portion, a radially outer portion, a radially intermediate bulging portion within which is defined an air passage cavity, a plurality of air intake ports formed at a radially inner side of said intermediate bulging portion and communicating with said air passage cavity, a plurality of air injection ports formed at a radially outer side of said intermediate bulging portion and communicating with said air passage cavity, and a plurality of radially extending slots extending from said air passage cavity through a periphery of said cutter base;
- a plurality of flap means fixed to said cutter base respectively adjacent said plurality of air intake ports for forcing air into said air passage cavity upon rotation of said cutter base;
- and
- a plurality of cutting bits fixed to said periphery of said cutter base.
A rotary wheel comprising:
- a cutter base comprising two parallel substantially disc-shaped plates, each of which has an inner face and an outer face, and a radially outer portion, a radially inner portion, and a radially intermediate portion, said inner faces of said two parallel plates abutting one another along said radially inner and said radially outer portions and being spaced from one another along said radially intermediate portion to define an air passage cavity therebetween;
- a plurality of air intake ports formed at a radially inner side of said radially intermediate portion of at least one of said two parallel plates in communication with said air passage cavity, for introducing air into said air passage cavity upon rotation of said cutter base;
- a plurality of air injection ports formed at a radially outer side of said radially intermediate portion of at least one of said two parallel plates in communication with said air passage cavity, said air injection ports being adapted to have air injected therethrough from said air passage cavity;
- a plurality of radially extending slots formed in said cutter base and extending from said plurality of injection ports, respectively, through an outer periphery of said cutter base;
- and
- a plurality of cutting bits fixed to said outer periphery of said cutter base.
Dependencies are inferred from the claim text.