GB774261A - Improvements in or relating to drum type coal and like cutters - Google Patents

Improvements in or relating to drum type coal and like cutters

Info

Publication number
GB774261A
GB774261A GB23647/55A GB2364755A GB774261A GB 774261 A GB774261 A GB 774261A GB 23647/55 A GB23647/55 A GB 23647/55A GB 2364755 A GB2364755 A GB 2364755A GB 774261 A GB774261 A GB 774261A
Authority
GB
United Kingdom
Prior art keywords
drum
bit
channels
holders
bit holders
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB23647/55A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gebr Eickhoff Maschinenfabrik u Eisengiesserei GmbH
Original Assignee
Gebr Eickhoff Maschinenfabrik u Eisengiesserei GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gebr Eickhoff Maschinenfabrik u Eisengiesserei GmbH filed Critical Gebr Eickhoff Maschinenfabrik u Eisengiesserei GmbH
Publication of GB774261A publication Critical patent/GB774261A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
    • E21C25/06—Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate
    • E21C25/10—Rods; Drums

Abstract

774,261. Mineral -- mining apparatus. EICKHOFF, MASCHINENFABRIK UND EISENGIESSEREI, GEB. Aug. 17, 1955 [Sept. 2, 1954], No. 23647/55. Class 68 (1). A number of circumferentially extending grooves at the periphery of a drum cutter of a mineral-mining machine are each adapted to receive a laterally extending projection 5 of a bit holder 4 so that when the projections 5 are housed in the grooves the bit holders are prevented from being moved in the radial direction or from being tilted or turned while permitting the bit holder to be moved in the circumferential direction of the drum. In one embodiment inwardly directed lugs 5 on each bit holder 4 engage around T-section bars 2 secured to and projecting from the peripheral surface of the drum. In a second embodiment channels of T-shaped cross-section are formed in the peripheral portion of the drum, and in a third embodiment rectangular channels are cut in the peripheral portion of the drum and members fixed to the periphery of the drum to overhang the sides of the channel. The members are formed by fixing a band over the mouth of the channel and parting the band intermediate its edges. Portions of the bars 2 or channels are cut away to permit of the entry of the lateral projections of the bit holders into the recesses and these portions are closed after the entry of the bit holders by locking members which cause the bit holders to be pressed tightly together.
GB23647/55A 1954-09-02 1955-08-17 Improvements in or relating to drum type coal and like cutters Expired GB774261A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEE9492D DE958462C (en) 1954-09-02 1954-09-02 Schraemwalze studded with chisels

Publications (1)

Publication Number Publication Date
GB774261A true GB774261A (en) 1957-05-08

Family

ID=25948060

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23647/55A Expired GB774261A (en) 1954-09-02 1955-08-17 Improvements in or relating to drum type coal and like cutters

Country Status (2)

Country Link
DE (1) DE958462C (en)
GB (1) GB774261A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5083839A (en) * 1990-06-27 1992-01-28 Rick Younger Apparatus for grooving or grinding pavement

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1155075B (en) * 1959-05-29 1963-10-03 Eickhoff Geb Schraemwalze with driving bars
AT362315B (en) * 1979-02-02 1981-04-27 Ver Edelstahlwerke Ag CUTTING HEAD FOR SUCTION EXCAVATOR

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE354856C (en) * 1921-03-27 1922-06-16 Emil Schweitzer Schraem rod, in which toothed washers are lined up in a helical line of the teeth on a rod body
GB321255A (en) * 1928-08-23 1929-11-07 Daniel Boone Mining machine
DE758584C (en) * 1941-06-28 1953-02-16 Eickhoff Maschinenfabrik Geb Schraem disc with chisels inserted in special chisel holders on its circumference

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5083839A (en) * 1990-06-27 1992-01-28 Rick Younger Apparatus for grooving or grinding pavement

Also Published As

Publication number Publication date
DE958462C (en) 1957-02-21

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