GB536786A - Improvements in or relating to rock drill tools - Google Patents

Improvements in or relating to rock drill tools

Info

Publication number
GB536786A
GB536786A GB3962/40A GB396240A GB536786A GB 536786 A GB536786 A GB 536786A GB 3962/40 A GB3962/40 A GB 3962/40A GB 396240 A GB396240 A GB 396240A GB 536786 A GB536786 A GB 536786A
Authority
GB
United Kingdom
Prior art keywords
stem
march
bore
relating
inner sleeve
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
GB3962/40A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB536786A publication Critical patent/GB536786A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/005—Cylindrical shanks of tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2226/00—Materials of tools or workpieces not comprising a metal
    • B23B2226/33—Elastomers, e.g. rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2231/00—Details of chucks, toolholder shanks or tool shanks
    • B23B2231/02—Features of shanks of tools not relating to the operation performed by the tool
    • B23B2231/0216—Overall cross sectional shape of the shank
    • B23B2231/0232—Hexagonal

Abstract

536,786. Percussive drills. DUNSTAN, W. March 2, 1940, Nos. 3962 and 3963. Convention dates, March 4, 1939, and May 11, 1939. Addition to 521,323. [Class 124] In a percussive drill tool in which the stem is surrounded by a collar consisting of an inner sleeve of rubber or like resilient material and a rigid outer casing with a non- cylindrical outer surface, as described in the parent Specification, the outer casing 4 is internally cylindrical and is preformed in hardened metal so as to avoid any deformation, whilst the inner sleeve 5 has a bore of less diameter than the stem 2 and is expanded by a partly conical mandrel 11 when forcing the stem into the bore. Alternatively, the rear end 8 of the casing 4 may be closed and the front end fitted with a screwed gland 16 having a dished surface 18 for compressing the sleeve 5.
GB3962/40A 1939-03-04 1940-03-02 Improvements in or relating to rock drill tools Expired GB536786A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA536786X 1939-03-04

Publications (1)

Publication Number Publication Date
GB536786A true GB536786A (en) 1941-05-27

Family

ID=25560390

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3962/40A Expired GB536786A (en) 1939-03-04 1940-03-02 Improvements in or relating to rock drill tools

Country Status (1)

Country Link
GB (1) GB536786A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3971447A (en) * 1973-12-03 1976-07-27 Sandvik Aktiebolag Drill rod for percussion drilling
DE2920139A1 (en) * 1979-05-18 1980-11-20 Ruhrkohle Ag Impact drill bit for underground mining - has additional weights arranged as collars surrounding bits
GB2142267A (en) * 1983-07-01 1985-01-16 Nilsson Goran Alfred Improvements in or relating to pressure medium operated needle hammers
US4627166A (en) * 1984-03-26 1986-12-09 Mcminn William D Washer cutter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3971447A (en) * 1973-12-03 1976-07-27 Sandvik Aktiebolag Drill rod for percussion drilling
DE2920139A1 (en) * 1979-05-18 1980-11-20 Ruhrkohle Ag Impact drill bit for underground mining - has additional weights arranged as collars surrounding bits
GB2142267A (en) * 1983-07-01 1985-01-16 Nilsson Goran Alfred Improvements in or relating to pressure medium operated needle hammers
US4627166A (en) * 1984-03-26 1986-12-09 Mcminn William D Washer cutter

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