Pipe cutting

Patent 5081768 Issued on January 21, 1992. Estimated Expiration Date:

January 22, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

1766323

2807921

2842238

3704516

Device for cutting pipes
Patent #: 4402136
Issued on: 09/06/1983
Inventor: Rast

Pipe end preparation and cutoff tool
Patent #: 4418591
Issued on: 12/06/1983
Inventor: Astle

Pipe cutter with split ring frame and enclosed feeding means
Patent #: 4493150
Issued on: 01/15/1985
Inventor: Garcia , et al.

Pipe processing device
Patent #: 4625464
Issued on: 12/02/1986
Inventor: Kubo

Portable powered pipe working machine
Patent #: 4682919
Issued on: 07/28/1987
Inventor: Mitchell

Pipe cutting device
Patent #: 4689883
Issued on: 09/01/1987
Inventor: Dent

More ...

Inventors

Application

No. 644094 filed on 01/22/1991

US Classes:

30/101, Disc cutter30/96, With clamping means30/97Rotary power source

Examiners

Primary: Watts, Douglas D.
Assistant: Heyrana, Sr., Paul M.

Attorney, Agent or Firm

Fish & richardson

International Classes

B26D 003/16
B23D 021/00
B23D 021/04

Abstract

A pipe cutting system includes an annular pipe encircling band member with parallel edge surfaces for encircling the pipe to be cut, releasable structure for securing the band member in pipe encircling configuration, and structure for spacing the edge surfaces of the band from the outer surface of the pipe. A carriage assembly includes two pairs of opposed spaced guide members for engaging opposed edges of the band and providing stable guidance of the carriage assembly around the pipe and structure for fixedly mounting a cutting tool on the carriage assembly. The cutting tool assembly is secured to the carriage assembly for movement relative to the pipe, preferably about a pivot axis parallel to the axis of the pipe, and includes a drive motor, a manual motor control, and a cutter disc coupled to the drive motor and adapted to be driven in rotation by the drive motor in response to the manual motor control.