David Wray Littlejohn

US Patent:

20200277085, Sep 3, 2020

Filed:

May 15, 2020

Appl. No.:

16/874747

Inventors:

- Stratford CT, US
David Littlejohn - Haslet TX, US
Sven Roy Lofstrom - Irving TX, US

International Classification:

B64F 5/10
B64C 27/473
B23Q 3/06
B23Q 3/00

Abstract:

A bond fixture including a plurality of supports mounted about a surface. At least one of the plurality of supports includes a vertical member and a hand crank operable to adjust a position of the vertical member. A first fixture is disposed at an end of the bond fixture and is movable relative to the surface. The first fixture includes a base and a support extending from the base. A second fixture includes a first member and a second member movably coupled. A fastener extending between the first member and the second member controls relative movement of the first member and the second member to define an opening there between. Each of the first member and the second member includes a plate having a heater formed therein.

US Patent:

20200001347, Jan 2, 2020

Filed:

Sep 11, 2019

Appl. No.:

16/567778

Inventors:

- Stratford CT, US
David Littlejohn - Haslet TX, US
Scott Oren Smith - Bedford TX, US

International Classification:

B21D 53/78
B29C 65/02

Abstract:

A bond fixture includes a frame that defines a chamber for receiving a component. At least one bladder assembly is mounted to the frame and extends into the chamber to apply a pressure to an adjacent surface of the component. A caul assembly is positionable about the component and receivable within the chamber. The caul assembly heats a localized portion of the component.

US Patent:

20190367187, Dec 5, 2019

Filed:

Aug 13, 2019

Appl. No.:

16/539408

Inventors:

- Stratford CT, US
David Littlejohn - Haslet TX, US

International Classification:

B64F 5/10

Abstract:

A holding fixture includes a first blade support assembly and a second blade support assembly. The second blade support assembly is spaced at a distance from the first blade support assembly and includes a base plate removably mounted to a milling machine, an adjustable conic support connectable to the base plate via a spacer block, and a blade adjustment assembly movable to control a pressure applied by the blade adjustment assembly.

US Patent:

20190241261, Aug 8, 2019

Filed:

Apr 17, 2019

Appl. No.:

16/387003

Inventors:

- Stratford CT, US
David Littlejohn - Haslet TX, US
Eric Boyle - Haslet TX, US

International Classification:

B64C 27/46
B64F 5/40
B64F 5/10

Abstract:

A bond fixture for bonding a component includes a frame defining a chamber for receiving the component. A first pad and a second pad are mounted to the frame. At least one of the first pad and the second pad is movable relative to the frame to adjust a pressure applied to the component. A caul assembly is adapted to be disposed in thermal communication with the component. The caul assembly heats a localized portion of the component.

US Patent:

20190225329, Jul 25, 2019

Filed:

Apr 3, 2019

Appl. No.:

16/374578

Inventors:

- Stratford CT, US
David Littlejohn - Haslet TX, US
Eric Boyle - Haslet TX, US
Scott Oren Smith - Bedford TX, US

International Classification:

B64C 27/473
B64F 5/10

Abstract:

A bond fixture includes a first fixture having a heater and a plurality of clamps. Each of the plurality of clamps includes a first member and a second member rotatable between a first position and a second position. A second fixture includes a root end lift translatable vertically between a retracted position and an extended position and a root end clamp translatable along a horizontal axis. The root end clamp is configured to cooperate with the root end.

US Patent:

20180093782, Apr 5, 2018

Filed:

Sep 30, 2016

Appl. No.:

15/282239

Inventors:

- Stratford CT, US
David Littlejohn - Haslet TX, US

International Classification:

B64F 5/00
B23P 15/04
B23P 6/00

Abstract:

A holding fixture includes a first blade support assembly and a second blade support assembly. The second blade support assembly is spaced at a distance from the first blade support assembly and includes a base plate removably mounted to a milling machine, an adjustable conic support connectable to the base plate via a spacer block, and a blade adjustment assembly movable to control a pressure applied by the blade adjustment assembly.

US Patent:

20180086485, Mar 29, 2018

Filed:

Sep 26, 2016

Appl. No.:

15/275915

Inventors:

- Stratford CT, US
David Littlejohn - Haslet TX, US

International Classification:

B64F 5/00
B64C 27/48
B64C 11/04

Abstract:

A root end spar plate closure tool includes a spar plate compression assembly for applying compressive force to a spar plate, a first flange extending from the spar plate compression assembly and including at least one pin opening, and a second flange extending from the spar plate compression assembly and including at least one pin opening. The first flange and the second flange define a blade root gap sized to receive a blade root.

US Patent:

20180043418, Feb 15, 2018

Filed:

Aug 9, 2016

Appl. No.:

15/232256

Inventors:

- Stratford CT, US
David Littlejohn - Haslet TX, US
Scott Oren Smith - Bedford TX, US

International Classification:

B21D 53/78
B29C 65/02

Abstract:

A bond fixture includes a frame that defines a chamber for receiving a component. At least one bladder assembly is mounted to the frame and extends into the chamber to apply a pressure to an adjacent surface of the component. A caul assembly is positionable about the component and receivable within the chamber. The caul assembly heats a localized portion of the component.