Tool-free indexable tooth with hermetic spring
AssigneeGreen Manufacturing, Inc.
InventorBrian P. Holly
Life of this patent
Estimating the term…
Abstract
A tree stump grinding wheel assembly includes a rotor having a plurality of holders distributed about its cutting periphery. Each holder has a neck in which resides a socket adapted to receive the shank of an indexable tooth. A head is attached to one end of the shank and screw threads are formed in its other end. The head has a plurality of flats configured to sequentially register with a forward shoulder on the neck. A hermetic spring is operatively disposed on the shank between a rearward face of the socket and a retention nut. The hermetic spring is made of elastomeric material and has a tapered nose that self-seats in a countersink at the rearward opening of the socket. The hermetic spring has an accordion-like bellows section. The bellows section can have a central annular bulge.
Claims17
An indexable cutting tooth assembly for tree stump grinding, said assembly comprising:
- a shank and having first and second ends, a head attached to said first end of said shank, said head including cutting tip,
- a retainer operatively secured to said second end of said shank, and
- a hermetic spring operatively disposed on said shank between said retainer and said head, said hermetic spring being fabricated from an elastomeric material, wherein said hermetic spring has a nose, said nose comprising a tapered point which forms a fluid tight seal with a holder.
An indexable tooth and holder assembly for a tree stump grinding wheel, said assembly comprising:
- a holder having a base and a neck extending from said base, said neck having a distal end spaced from said base, said distal end including a socket extending cylindrically along a tooth axis, said socket having a forward opening and a rearward opening, said distal end of said neck having a forward face and a rearward face, said distal end of said neck having a forward shoulder associated with said forward face,
- an indexable tooth having a shank slidably received in said socket, said shank having first and second ends, a head attached to said first end of said shank, said head protruding from said forward face of said socket, said second end protruding from said rearward face of said socket, said head having at least one flat configured to register with said forward shoulder, said head including cutting tip,
- a retainer operatively secured to said second end of said shank, and
- a hermetic spring operatively disposed on said shank between said retainer and said rearward face of said of said socket,
- wherein said rearward opening of said socket is formed with a countersink, said hermetic spring having a nose, said nose including a tapered point seated in said countersink at said rearward opening of said socket which forms a fluid tight seal with said holder.
A tree stump grinding wheel assembly comprising:
- a rotor having a cutting periphery, a plurality of holders distributed about said cutting periphery of said rotor, each holder having a base and a neck extending from said base, said neck having a distal end spaced from said base, said distal end including a socket extending cylindrically along a tooth axis, said socket having a forward opening and a rearward opening, said distal end of said neck having a forward face and a rearward face, said forward face and said rearward face disposed perpendicular to said tooth axis, said distal end of said neck having a forward shoulder,
- an indexable tooth disposed in each holder, said indexable tooth having a shank slidably received in said socket in said distal end of said neck, said shank having first and second ends, a head attached to said first end of said shank, said head protruding from said forward face of said socket, said second end protruding from said rearward face of said socket, said head having at least one flat configured to register with said forward shoulder, said head including cutting tip,
- a retainer operatively secured to said second end of said shank, and
- a hermetic spring operatively disposed on said shank between said retainer and said rearward face of said of said socket,
- wherein said rearward opening of said socket is formed with a countersink, said hermetic spring having a nose, said nose including a tapered point seated in said countersink at said rearward opening of said socket which forms a fluid tight seal with said holder.
Dependencies are inferred from the claim text.