#Remove a broken bolt extractor portable

7 is a view of the tool extracting the broken bolt stud.Ī tool (10) for preforming the method according to claim 1, and comprising a shaft (20) threaded in a first hand and formed at its lower end with a drill bit (12) having the opposite hand, the bit (12) being superposed by an outwardly and downwardly sloping collet-spreading surface (18), the upper end of the shaft (20) having a cross-section with peripheral flats (22) to be engaged by a driving chuck (46), a bolt-gripping collet (24) internally threaded to cooperate with the threads on the shaft (20), the collet having one end (26) tapered and longitudinally split to be spread as the end engages the collet-spreading surface (18), said tool further being characterised in that the other end (36) of the collet (24) having its greatest diameter substantially larger than the diameter of the drill bit (12) and the same dimension as the diameter of the opening (O) in the flange (F), whereby with the collet (24) threaded on the shaft (20) and said other end of the collet down, the engagement of the said other end of the collet with the margins of the opening (O) in the flange (F) guides the drilling of the bit (12) toward the center line of the broken bolt (50). 6 shows the drilling proceeding with the collet right side up, and 5a is an enlarged sectional view taken on the line 5a-5a of Fig. 5 is a view of the combination tool of the present invention used to remove a broken bolt stud showing the collet inverted and the guide means in use in the opening of an adjacent flange, the tool initially penetrating the stud, 1 is a perspective view of the bolt extractor combination tool of the present invention, Further, the invention relates to improved gripping means on the outside of the collet preferably in the form of left-hand threads or fluttings.

This guide means is in the form of an enlargement on the upper end of the collet which, when the collet is inverted, engages in the aligned opening of an adjacent flange as the drilled hole is started. The present invention relates to improved guide means to guide the drill bit in making its initial contact with the stud so that the drilled bore will be in the center thereof.

B25B13/50- Spanners Wrenches for special purposes for operating on work of special profile, e.g.

B25B13/48- Spanners Wrenches for special purposes.

B25B27/18- Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same withdrawing broken threaded parts or twist drills.

B25B27/14- Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same.B25B27/00- Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for.B25B- TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING.

#Remove a broken bolt extractor portable

B25- HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS.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 Alden Corp filed Critical Alden Corp Publication of EP0451256A1 publication Critical patent/EP0451256A1/en Publication of EP0451256A4 publication Critical patent/EP0451256A4/en Application granted granted Critical Publication of EP0451256B1 publication Critical patent/EP0451256B1/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Original Assignee Alden Corp 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 or warranty as to the accuracy of the list.) ( en Inventor Eli Polonsky Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number EP90916914A Other languages German ( de)