Patents by Inventor Stephen W. Darwell

Stephen W. Darwell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11732472
    Abstract: Disclosed is a form work system (100) that comprises first (102a) and second (102b) building formwork components that are connected by a building formwork connector (104) The connector (104) comprises a moveable portion (128) that is moveable from a closed position to an open position. In the closed position, one or more sidewalls of the connector (104) define a cavity (144) for receipt of cementitious material. The cavity (144) of the connector (104) is located with respect to cavities (110) of the first (102a) and second (102b) formwork components. In the open position, access is provided to the cavity (144) of the connector (104).
    Type: Grant
    Filed: June 23, 2021
    Date of Patent: August 22, 2023
    Assignee: CSR BUILDING PRODUCTS LIMITED
    Inventor: Stephen W. Darwell
  • Patent number: 11332927
    Abstract: A building formwork component comprising first and second spaced sidewalls having one or more webs extending there-between, each sidewall comprising a flange extending inwardly along a first edge of the sidewall such that an outer surface of the flange forms a ramp surface; and a groove extending along an opposing second edge of the sidewall. The component may be coupled to a like component by relative movement of the components towards each other, whereby the flanges are received in respective grooves of the like component, and whereby the ramp surfaces facilitate such coupling by engaging respective second edges of the like component to move the second edges and/or ramp surfaces for engagement of the flanges in the grooves.
    Type: Grant
    Filed: January 5, 2021
    Date of Patent: May 17, 2022
    Assignee: CSR BUILDING PRODUCTS LIMITED
    Inventor: Stephen W. Darwell
  • Publication number: 20210317657
    Abstract: Disclosed is a form work system (100) that comprises first (102a) and second (102b) building formwork components that are connected by a building formwork connector (104) The connector (104) comprises a moveable portion (128) that is moveable from a closed position to an open position. In the closed position, one or more sidewalls of the connector (104) define a cavity (144) for receipt of cementitious material. The cavity (144) of the connector (104) is located with respect to cavities (110) of the first (102a) and second (102b) formwork components. In the open position, access is provided to the cavity (144) of the connector (104).
    Type: Application
    Filed: June 23, 2021
    Publication date: October 14, 2021
    Inventor: Stephen W. Darwell
  • Patent number: 11078666
    Abstract: Disclosed is a form work system (100) that comprises first (102a) and second (102b) building formwork components that are connected by a building formwork connector (104). The connector (104) comprises a moveable portion (128) that is moveable from a closed position to an open position. In the closed position, one or more sidewalls of the connector (104) define a cavity (144) for receipt of cementitious material. The cavity (144) of the connector (104) is located with respect to cavities (110) of the first (102a) and second (102b) formwork components. In the open position, access is provided to the cavity (144) of the connector (104).
    Type: Grant
    Filed: March 6, 2018
    Date of Patent: August 3, 2021
    Inventor: Stephen W. Darwell
  • Publication number: 20210123235
    Abstract: A building formwork component comprising first and second spaced sidewalls having one or more webs extending there-between, each sidewall comprising a flange extending inwardly along a first edge of the sidewall such that an outer surface of the flange forms a ramp surface; and a groove extending along an opposing second edge of the sidewall. The component may be coupled to a like component by relative movement of the components towards each other, whereby the flanges are received in respective grooves of the like component, and whereby the ramp surfaces facilitate such coupling by engaging respective second edges of the like component to move the second edges and/or ramp surfaces for engagement of the flanges in the grooves.
    Type: Application
    Filed: January 5, 2021
    Publication date: April 29, 2021
    Inventor: Stephen W. Darwell
  • Patent number: 10907348
    Abstract: A building formwork component comprising first and second spaced sidewalls having one or more webs extending there-between, each sidewall comprising a flange extending inwardly along a first edge of the sidewall such that an outer surface of the flange forms a ramp surface; and a groove extending along an opposing second edge of the sidewall. The component may be coupled to a like component by relative movement of the components towards each other, whereby the flanges are received in respective grooves of the like component, and whereby the ramp surfaces facilitate such coupling by engaging respective second edges of the like component to move the second edges and/or ramp surfaces for engagement of the flanges in the grooves.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: February 2, 2021
    Assignee: CSR BUILDING PRODUCTS LIMITED
    Inventor: Stephen W. Darwell
  • Publication number: 20200385986
    Abstract: Disclosed is a form work system (100) that comprises first (102a) and second (102b) building formwork components that are connected by a building formwork connector (104). The connector (104) comprises a moveable portion (128) that is moveable from a closed position to an open position. In the closed position, one or more sidewalls of the connector (104) define a cavity (144) for receipt of cementitious material. The cavity (144) of the connector (104) is located with respect to cavities (110) of the first (102a) and second (102b) formwork components. In the open position, access is provided to the cavity (144) of the connector (104).
    Type: Application
    Filed: March 6, 2018
    Publication date: December 10, 2020
    Inventor: Stephen W. Darwell
  • Publication number: 20200123769
    Abstract: A building formwork component comprising first and second spaced sidewalls having one or more webs extending there-between, each sidewall comprising a flange extending inwardly along a first edge of the sidewall such that an outer surface of the flange forms a ramp surface; and a groove extending along an opposing second edge of the sidewall. The component may be coupled to a like component by relative movement of the components towards each other, whereby the flanges are received in respective grooves of the like component, and whereby the ramp surfaces facilitate such coupling by engaging respective second edges of the like component to move the second edges and/or ramp surfaces for engagement of the flanges in the grooves.
    Type: Application
    Filed: December 20, 2019
    Publication date: April 23, 2020
    Inventor: Stephen W. Darwell
  • Patent number: 10519654
    Abstract: A building formwork component comprising first and second spaced sidewalls having one or more webs extending there-between, each sidewall comprising a flange extending inwardly along a first edge of the sidewall such that an outer surface of the flange forms a ramp surface; and a groove extending along an opposing second edge of the sidewall; wherein the component may be coupled to a like component by relative movement of the components towards each other, whereby the flanges are received in respective grooves of the like component, and whereby the ramp surfaces facilitate such coupling by engaging respective second edges of the like component to move the second edges and/or ramp surfaces for engagement of the flanges in the grooves.
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: December 31, 2019
    Assignee: CSR BUILDING PRODUCTS LIMITED
    Inventor: Stephen W. Darwell
  • Publication number: 20160289960
    Abstract: A building formwork component comprising first and second spaced sidewalls having one or more webs extending there-between, each sidewall comprising a flange extending inwardly along a first edge of the sidewall such that an outer surface of the flange forms a ramp surface; and a groove extending along an opposing second edge of the sidewall; wherein the component may be coupled to a like component by relative movement of the components towards each other, whereby the flanges are received in respective grooves of the like component, and whereby the ramp surfaces facilitate such coupling by engaging respective second edges of the like component to move the second edges and/or ramp surfaces for engagement of the flanges in the grooves.
    Type: Application
    Filed: November 7, 2014
    Publication date: October 6, 2016
    Inventor: Stephen W. Darwell