Tool for removing end of cut-off pipe from a pipe coupling

• US 5,401,126 A
• Filed: 03/04/1993
• Issued: 03/28/1995
• Est. Priority Date: 01/17/1991
• Status: Expired due to Fees

• Current Assignee: Duane Norris, Steve Cromer
• Original Assignee: Duane Norris, Steve Cromer
• Inventors: Norris, Duane, Cromer, Steve
• Primary Examiner(s): Howell, Daniel W.
• Application Number:
  US08/026,262
• Time in Patent Office: 754 Days
• Field of Search: 7/157, 408/80, 408/81, 408/82, 408/201, 408/223, 408/224, 408/225, 408/227, 408/229
• US Class Current: 408/225
• CPC Class Codes: B23B 5/168 with guiding devices
• CPC Class Codes: Y10T 408/5584 Engaging surface axially advanced of tool-action
• CPC Class Codes: Y10T 408/9065 with central lead
• CPC Class Codes: Y10T 408/909 Having peripherally spaced cutting edges

Abstract

A bit usable in combination with a rotatory driver, such as a drill, for extracting a remnant of a cut-off pipe from a pipe socket. The bit comprises a forward portion which is a pilot to keep the bit centered in the remnant and thereby centered in the pipe socket, a forward-facing ring cutter whose inner and outer diameters generally match the inner and outer diameters of the pipe remnant being extracted, said ring cutter being operable to cut and/or scrape the remnant edgewise from the socket, and a forward facing ring scraper operable to stop the bit from excessive penetration into the pipe socket and operable to scrape bonding material remnants from the end face of the pipe coupling.

Claims

1. A device useable with a rotating driver for removing a remnant of a pipe from a pipe socket comprising:

(a) an elongated shank for coupling the rotational power of the driver to the device,

(b) cutting means spaced radially from the shank and powered by the shank for cutting the pipe remnant generally edgewise when the device is rotated,

(c) non-cutting means for centering and keeping centered the device axially with respect to the pipe remnant comprising means projecting radially from the shank forward of the cutting means having a rotating diameter sufficiently smaller than the inner diameter of the pipe remnant to allow said means projecing to slidingly fit into the pipe remnant, and

(d) means, extending perpendicularly to an axis of tool rotation, for stopping the device from excessive penetration into the socket.

2. The device according to claim 1 further comprising means for scraping an end face of the socket to remove bonding material and other materials foreign to the coupling.

3. The device according to claim 2 wherein the means for stopping the device from excessive penetration into the socket comprises the means for scraping the end face of the socket.

4. The device according to claim 1 wherein the cutting means comprises a forward-facing ring cutter coaxially connected to the shank having inner and outer diameters generally matching respectively the inner and outer diameters of the pipe remnant.

5. The device according to claim 4 further comprising means for scraping an end face of the socket to remove bonding material and other materials foreign to the coupling.

6. The device according to claim 5 wherein the means for stopping the device from excessive penetration into the socket comprises the means for scraping the end face of the socket.

7. A device useable with a rotating driver for removing a remnant of a pipe from a pipe socket comprising:

(a) an elongated shank for coupling the rotational power of the driver to the device,

(b) cutting means spaced radially from the shank and rotated by the shank for cutting the pipe remnant generally edgewise,

(c) means for centering in the pipe remnant the axis of cutting means rotation comprising a plurality of angularly spaced vane means projecting radially from the shank to a uniform extent forward of the cutting means, each vane means having forward and longitudinal edges that are blunt, said plurality of vane means having a rotating diameter sufficiently smaller than the inner diameter of the pipe remnant to allow said plurality of vane means to slidingly fit into the pipe remnant, and

(d) means for abutting an end face of the socket to prevent excessive penetration of the device into the socket.

8. The device according to claim 7 further comprising means for scraping an end face of the socket to remove bonding material and other materials foreign to the coupling.

9. The device according to claim 8 wherein the means for stopping the device from excessive penetration into the socket comprises the means for scraping the end face of the socket.

10. The device according to claim 7 wherein the cutting means comprises a forward-facing ring cutter coaxially connected to the shank having inner and outer diameters generally matching respectively the inner and outer diameters of the pipe remnant.

11. The device according to claim 10 further comprising means for scraping an end face of the socket to remove bonding material and other materials foreign to the coupling.

12. The device according to claim 11 wherein the means for stopping the device from excessive penetration into the socket comprises the means for scraping the end face of the socket.