AT28328B - Eccentric deep drill bit. - Google Patents

Eccentric deep drill bit.

Info

Publication number
AT28328B
AT28328B AT28328DA AT28328B AT 28328 B AT28328 B AT 28328B AT 28328D A AT28328D A AT 28328DA AT 28328 B AT28328 B AT 28328B
Authority
AT
Austria
Prior art keywords
drill bit
deep drill
drilling
eccentric deep
eccentric
Prior art date
Application number
Other languages
German (de)
Inventor
William Henry Mac Garvey
Original Assignee
William Henry Mac Garvey
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 William Henry Mac Garvey filed Critical William Henry Mac Garvey
Application granted granted Critical
Publication of AT28328B publication Critical patent/AT28328B/en

Links

Landscapes

  • Earth Drilling (AREA)
  • Drilling Tools (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Exzentrischer Tiefbohrmeissel. 



   Gegenstand vorliegender Erfindung ist ein Tiefbohrmeissel, bei welchem die Bohrachse die Nachbohrschneide in einem Punkte schneidet, derart, dass die Summe der rechts von der Achse liegenden Schnoideliingen gleich ist der Summe der links liegenden Schneidelangen. zum Zwecke, um den Arbeitsdruck auf alle Schneiden gleichmässig zu verteilen und eine stärkere Abnützung zu verhindern bzw. die Sicherheit gegen Bruch der Vorbohrschneide zu erhöhen. 



   In der   Zeichnung   ist der Erfindungsgegenstand beispielsweise dargestellt, u. zw. zeigt : 
 EMI1.1 
 
Der Tiefbohrmeissel besitzt an einem mit einem konischen Schraubengewinde 2 ver-   sehenen Schafte   eine Vorbohrschneide 3. eine höher angeordnete, hiezu senkrechte Nach-   bohrschneido   und   senkrecht   zur letzteren eine gebogene Schneide 5, deren Krümmungs-   mittelpunkt   in der   Bohrachse   a-a liegt. Beiderseits dieser Schneiden betinden sich Rinnen, 
 EMI1.2 
 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



  Eccentric deep drill bit.



   The subject of the present invention is a deep drilling chisel in which the drilling axis intersects the reaming cutter at one point such that the sum of the Schnoideliingen lying to the right of the axis is equal to the sum of the cutting lengths lying on the left. for the purpose of distributing the working pressure evenly on all cutting edges and preventing excessive wear and / or increasing the security against breakage of the pre-drilling cutting edge.



   In the drawing, the subject of the invention is shown, for example, u. between shows:
 EMI1.1
 
On a shank provided with a conical screw thread 2, the deep drilling chisel has a pre-drilling cutting edge 3, a post-drilling cutting edge arranged higher up and perpendicular to this and a curved cutting edge 5 perpendicular to the latter, the center of curvature of which lies in the drilling axis a-a. On both sides of these edges there are grooves,
 EMI1.2
 

** WARNING ** End of DESC field may overlap beginning of CLMS **.

Claims (1)

PATENT-ANSPRUCH : Exzeutrischer Tiefbohrmeissel, dadurch gekennzeichnet, dass die Schneiden des Meissels derart angeordnet sind, dass die Länge der Vorbohrschneide (3) vermehrt um das an- EMI1.3 **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Exzeutrischer deep drilling chisel, characterized in that the cutting edges of the chisel are arranged in such a way that the length of the pre-drilling cutting edge (3) increases by the EMI1.3 ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT28328D 1904-07-13 1904-07-13 Eccentric deep drill bit. AT28328B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT28328T 1904-07-13

Publications (1)

Publication Number Publication Date
AT28328B true AT28328B (en) 1907-05-10

Family

ID=3540993

Family Applications (1)

Application Number Title Priority Date Filing Date
AT28328D AT28328B (en) 1904-07-13 1904-07-13 Eccentric deep drill bit.

Country Status (1)

Country Link
AT (1) AT28328B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3159223A (en) * 1960-12-30 1964-12-01 Atlantic Refining Co Underdrilling roller bit
US3163243A (en) * 1960-12-30 1964-12-29 Atlantic Refining Co Underdrilling bit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3159223A (en) * 1960-12-30 1964-12-01 Atlantic Refining Co Underdrilling roller bit
US3163243A (en) * 1960-12-30 1964-12-29 Atlantic Refining Co Underdrilling bit

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