Bit holder for a ploughing bit and ploughing bit

Details Bit holder for a ploughing bit and ploughing bit Bit holder for a ploughing bit and ploughing bit

2007-12-25

2007-12-25

Beach, Thomas A (Department: 3671)

Excavating

Digging edge

Tooth or adaptor

C299S108000, C299S034040

Reexamination Certificate

active

11000275

ABSTRACT:
A bit holder for a ploughing bit of a coal or extraction plough includes an insert pocket open on the top side for receiving a bit shank formed on the ploughing bit. The pocket is bounded by two lateral supporting walls, a front and a rear supporting wall, whereby the rear supporting wall has an elevated section projecting over the adjoining, lateral supporting walls. The rear supporting wall forming a bit support for the ploughing bit slopes down to its outer regions. In order to allow a good support for an inserted bit and easy and fast installation of the bit the front face of the rear supporting wall is fitted on the outer regions with guiding surfaces sloping down inwards to the insert pocket as an installation aid for the ploughing bit.

REFERENCES:
patent: 2613069 (1952-10-01), Bruestle
patent: 2901233 (1959-08-01), Brown
patent: 3205015 (1965-09-01), Krekeler
patent: 3820849 (1974-06-01), Lundstrum et al.
patent: 3834764 (1974-09-01), Krekeler
patent: 3844619 (1974-10-01), Haller
patent: 4180292 (1979-12-01), Persson
patent: 4609227 (1986-09-01), Wild et al.
patent: 4744605 (1988-05-01), Komotzki
patent: 4762372 (1988-08-01), Rassmann et al.
patent: 4776639 (1988-10-01), Braun et al.
patent: 4998778 (1991-03-01), Braun et al.
patent: 5722733 (1998-03-01), Tank et al.
patent: 7073870 (2006-07-01), Tillessen et al.
patent: 298 03 944 (1998-04-01), None
patent: 299 01 985 (1999-04-01), None

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