Chisel holder changing system with chisel holder receivers

Details Chisel holder changing system with chisel holder receivers Chisel holder changing system with chisel holder receivers

2005-03-15

2005-03-15

Singh, Sunil (Department: 3673)

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

Clamped tooth holder or tooth mount

C411S903000, C411S914000

Reexamination Certificate

active

06866343

ABSTRACT:
A chisel holder changing system having a base element with a chisel holder receiver, into which a chisel holder equipped with a chisel can be inserted, wherein the chisel holder is inserted with a holder shaft into the chisel holder receivers and is maintained therein with the aid of bracing screws. Bracing screws can be screwed into a threaded receiver of the base element and during this are supported under tension in a bracing receiver of the holder shaft of the chisel holder. If in a chisel holder changing system in accordance with this invention the surfaces of the outer screw thread of the bracing screw and/or of the inner screw thread of the threaded receivers of the chisel holder receivers have a metallic layer of zinc and aluminum lamellas and a mineral chromium oxide bonding agent, which is burned in after the application, the screw connections are improved so that larger prestressing forces/tightening torques can be transmitted without damage to the screw connections.

REFERENCES:
patent: 3498677 (1970-03-01), Morrow
patent: 3983304 (1976-09-01), Sekhon
patent: 4040818 (1977-08-01), Clegg et al.
patent: 4642011 (1987-02-01), Uramoto et al.
patent: 4802807 (1989-02-01), Offenburger et al.
patent: 5573308 (1996-11-01), Simons et al.

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