Patents Assigned to Hotwork Developments Ltd.
  • Limiting the presence of the oxides of nitrogen in regenerative heating systems
    Patent number: 5217373
    Abstract: The presence of the oxides of nitrogen in the exhaust gas leaving a regenerator is limited by injecting water or water vapour into the regenerator 1 during its firing phase and causing the water or water vapour to reach the combustion chamber 26 of the regenerator 1 by way its heat storage bed 11 which has been preheated during a previous heat collecting phase.
    Type: Grant
    Filed: June 7, 1990
    Date of Patent: June 8, 1993
    Assignees: British Gas PLC, Hotwork Developments Ltd.
    Inventor: James H. Goodfellow
  • Limiting the presence of the oxides of nitrogen in regenerative heating systems
    Patent number: 4957430
    Abstract: The presence of the oxides of nitrogen in the exhaust gas leaving a regenerator is limited by injecting water or water vapor into the regenerator 1 during its firing phase and causing the water or water vapor to reach the combustion chamber 26 of the regenerator 1 by way its heat storage bed 11 which has been preheated during a previous heat collecting phase.
    Type: Grant
    Filed: October 6, 1989
    Date of Patent: September 18, 1990
    Assignees: British Gas plc, Hotwork Developments Ltd.
    Inventor: James H. Goodfellow
  • Regenerator for a regenerative heating system
    Patent number: 4807695
    Abstract: A regenerator for a regenerative heating system comprises a chamber 2 for storing a heat storage bed in the form of discrete particles 45, a closable inlet 16 for introducing fresh particles into the chamber 2 to replace contaminated particles and a closable outlet 18 for removing the contaminated particles from the chamber 2 so that the fresh particles may be introduced.
    Type: Grant
    Filed: June 9, 1988
    Date of Patent: February 28, 1989
    Assignees: British Gas plc, Hotwork Developments Ltd.
    Inventor: Trevor Ward
  • Limiting the presence of the oxides of nitrogen in regenerative heating systems
    Patent number: 4768949
    Abstract: The presence of the oxides of nitrogen in the exhaust gas leaving a regenerator is limited by injecting water or water vapor into the regenerator 1 during its firing phase and causing the water or water vapor to reach the combustion chamber 26 of the regenerator 1 by way its heat storage bed 11 which has been preheated during a previous heat collecting phase.
    Type: Grant
    Filed: September 14, 1987
    Date of Patent: September 6, 1988
    Assignees: British Gas plc, Hotwork Developments Ltd
    Inventor: James H. Goodfellow
  • Operation of a pulse-fired burner
    Patent number: 4747771
    Abstract: A pulse-fired burner is operated by modulating a fuel supply rate between a pilot level and a main level to provide a flame the level of which modulates respectively between a pilot level during a non-firing phase and a main flame level during a firing phase. Air supplied at a pilot rate is premixed with the fuel before ignition, the pilot air level being sufficient to support combustion of the fuel at the pilot rate but not at the main rate. The supply of fuel is terminated if no flame is sensed.
    Type: Grant
    Filed: November 10, 1986
    Date of Patent: May 31, 1988
    Assignees: British Gas PLC, Hotwork Developments Ltd.
    Inventors: James H. Goodfellow, Trevor Ward