Patents Represented by Attorney, Agent or Law Firm J. Stewart Brams
  • Fluid motor
    Patent number: 4196655
    Abstract: A fluid motor and more particularly a fluid motor having an improved piston head structure.
    Type: Grant
    Filed: January 12, 1976
    Date of Patent: April 8, 1980
    Assignee: Joy Manufacturing Company
    Inventors: Louis H. LeBlanc, Arthur A. Michaud
  • Drilling apparatus and method
    Patent number: 4194579
    Abstract: A drilling apparatus including improved means for drill string manipulation for effecting an improved method of drill steel breakout and disassembly.This is a continuation, division, of application Ser. No. 712,622, filed Aug. 9, 1976.
    Type: Grant
    Filed: May 8, 1978
    Date of Patent: March 25, 1980
    Assignee: Joy Manufacturing Company
    Inventors: Edward A. Bailey, James F. Ordway
  • Rock drill
    Patent number: 4174010
    Abstract: A percussive rock drill and more particularly a percussive rock drill having improved means for passing a flow of flushing fluid therethrough.
    Type: Grant
    Filed: August 15, 1977
    Date of Patent: November 13, 1979
    Assignee: Joy Manufacturing Company
    Inventor: George A. Hibbard
  • Filter
    Patent number: 4169794
    Abstract: A rotary filtering apparatus having improved filtrate flow conducting means.
    Type: Grant
    Filed: March 2, 1977
    Date of Patent: October 2, 1979
    Assignee: Joy Manufacturing Company
    Inventor: Charles L. Badino
  • Fluid operable hammer
    Patent number: 4150603
    Abstract: A fluid operable hammer including variable volume exhaust fluid receiving chamber means cooperable with improved motive fluid inlet and exhaust valve means.
    Type: Grant
    Filed: September 6, 1977
    Date of Patent: April 24, 1979
    Assignee: Joy Manufacturing Company
    Inventors: Murray D. Etherington, David V. Roberts
  • Control means
    Patent number: 4111066
    Abstract: This invention relates to improved traction control means for a mobile vehicle such as a tractor or excavating machine having a pair of laterally spaced, endless crawler tracks, each of which is powered independently by its own traction motor for generally curvilinear travel of the vehicle at variable speeds in either the forward or reverse direction.
    Type: Grant
    Filed: November 10, 1976
    Date of Patent: September 5, 1978
    Assignee: Joy Manufacturing Company
    Inventor: Frank B. Kendrick
  • Drill
    Patent number: 4106573
    Abstract: This invention relates generally to improved means for securing a working member within a rotary tool and is described hereinbelow with particular reference to a percussively actuatable striking bar secured by the novel securing means hereof within a percussive rock drilling apparatus.
    Type: Grant
    Filed: September 13, 1976
    Date of Patent: August 15, 1978
    Assignee: Joy Manufacturing Company
    Inventor: Edward A. Bailey
  • Drilling apparatus
    Patent number: 4102414
    Abstract: A drilling apparatus adapted to have a drill string releasably secured thereto and including improved means for selectively locking such a drill string against axial rotation.
    Type: Grant
    Filed: August 9, 1976
    Date of Patent: July 25, 1978
    Assignee: Joy Manufacturing Company
    Inventors: Edward A. Bailey, James F. Ordway
  • Rock drill
    Patent number: 4074771
    Abstract: A rock drill assembly and more particularly a rock drill assembly having improved fluid power means therefor.
    Type: Grant
    Filed: March 25, 1976
    Date of Patent: February 21, 1978
    Assignee: Joy Manufacturing Company
    Inventor: Ward D. Morrison
  • Screw rotor machine rotors and method of making
    Patent number: 4053263
    Abstract: Screw rotors for a screw compressor or expander incorporating improved screw profiles on both male and female rotors wherein certain mating portions of the two rotor screws have involute profiles to provide conjugate action of these screw portions with minimum sliding motion of such mating portions and with the remaining non-involute screw portions having generally circular arc profiles so that gear cutting and measuring techniques can be used in the production of such screw rotors.
    Type: Grant
    Filed: January 2, 1976
    Date of Patent: October 11, 1977
    Assignee: Joy Manufacturing Company
    Inventor: Robert A. Ingalls
  • Clamp
    Patent number: 4052047
    Abstract: Improved clamping or gripping means particularly for gripping an elongated formed member.
    Type: Grant
    Filed: February 12, 1976
    Date of Patent: October 4, 1977
    Assignee: Joy Manufacturing Company
    Inventor: Edward A. Bailey
  • Mining machine with cutter drum having internal drive motors
    Patent number: 4047763
    Abstract: A continuous mining machine having a rotary cutter drum provided with internal drive motors. The drive motors extend on opposite sides of the support boom for the rotary cutter drum and each motor is within the axial extent of the cutter drum on each side of the support boom.
    Type: Grant
    Filed: April 27, 1976
    Date of Patent: September 13, 1977
    Assignee: Joy Manufacturing Comapny
    Inventors: James L. Gilliland, Frank B. Kendrick
  • Hose training means
    Patent number: 4039032
    Abstract: This invention relates to conduit training means and more particularly an elongated, tensioned training means for training conduits in a predetermined path.
    Type: Grant
    Filed: October 24, 1975
    Date of Patent: August 2, 1977
    Assignee: Joy Manufacturing Company
    Inventor: Ward D. Morrison