Syed Salman Hasan

US Patent:

7287347, Oct 30, 2007

Filed:

Apr 11, 2005

Appl. No.:

11/103389

Inventors:

Syed Q. Hasan - Sugar Land TX, US

Assignee:

Rig-A-Lite Partnership Ltd. - Houston TX

International Classification:

G09F 13/00

US Classification:

40553, 40570, 40541, 40546

Abstract:

An exit sign for use in hazardous atmospheres including an explosion-proof housing and a sign panel with indicia thereon. The housing prevents the ignition of gas or vapor surrounding the enclosure due to sparks, flashes or an explosion of the gas or vapor within the enclosure by providing an ample heat sink surface along any flame path to cool gases escaping from the housing. The sign panel preferably includes one or more transparent sheets which are edge lit from a light source contained in the explosion-proof housing that shines through a window in the housing into the top edge of the sign panel to illuminate the face(s) and the indicia thereon. The light source utilizes a number of long life light emitting diodes. The exit sign preferably includes a sealed maintenance-fee rechargeable battery for powering the light source when externally supplied power to the exit sign is absent.

US Patent:

D637339, May 3, 2011

Filed:

Jun 14, 2010

Appl. No.:

29/370179

Inventors:

Syed Q. Hasan - Sugar Land TX, US
Anibal Rosado - Pearland TX, US

Assignee:

Rig-A-Lite Partnership Ltd. - Houston TX

International Classification:

2603

US Classification:

D26 89, D26 72

US Patent:

D637340, May 3, 2011

Filed:

Jun 14, 2010

Appl. No.:

29/370189

Inventors:

Syed Q. Hasan - Sugar Land TX, US
Anibal Rosado - Pearland TX, US

Assignee:

Rig-A-Lite Partnership Ltd. - Houston TX

International Classification:

2603

US Classification:

D26 89, D26 72

US Patent:

20130286675, Oct 31, 2013

Filed:

Apr 27, 2012

Appl. No.:

13/458726

Inventors:

Syed Q. Hasan - Sugar Land TX, US
Anibal Z. Rosado - Pearlland TX, US
William E. Martin - Crosswell MI, US

Assignee:

RIG-A-LITE PARTNERSHIP, LTD. - Houston TX

International Classification:

F21S 8/10
F21L 4/02
F21L 4/08
F21S 4/00

US Classification:

362543, 362225, 362184, 362183

Abstract:

A light fixture () that has at least one explosion-proof transparent tube () having first and second ends, as well as first and second fixture ends () attached to the first and second ends of the at least one transparent tube (). The fixture ends () define openings () arranged and designed to provide access to the interior of the at least one transparent tube (). The light fixture () further includes a plurality of removable caps () arranged and designed to close and seal the openings (), and a plurality of light emitting diodes () arranged and designed to be positioned within the at least one transparent tube () and to emit light through the tube ().

US Patent:

20140063793, Mar 6, 2014

Filed:

Sep 6, 2012

Appl. No.:

13/605721

Inventors:

Syed Q. Hasan - Sugar land TX, US
Anibal Z. Rosado - Pearland TX, US
William E. Martin - Croswell MI, US

Assignee:

RIG-A-LITE PARTNERSHIP, LTD. - Houston TX

International Classification:

F21L 4/02
F21V 29/00

US Classification:

362184, 362218

Abstract:

A light fixture having a “U”-shaped frame inside a sealed cylindrical housing. Mounted along the center of the face of the frame are one or more LED lamp panels, which include a number of LEDs, some of which may be powered by a back-up source such as an optionally supplied battery for emergency egress lighting. The lamp panels are mounted using a thermal interface material to promote heat transfer from the LED lamp panels to the frame, which in turn radiates the heat into the volume of the housing to enhance cooling. To each side of the LED lamp panels, a highly polished reflector is attached to the frame to focus and concentrate the light while simultaneously shielding the LEDs from heat radiated from the frame. Attached to the obverse side of the frame is a “U”-shaped back cover that forms an electrical enclosure. An optional diffuser may be supplied.

US Patent:

20140331533, Nov 13, 2014

Filed:

May 13, 2013

Appl. No.:

13/893118

Inventors:

- Houston TX, US
SYED Q. HASAN - Houston TX, US

Assignee:

RIG-A-LITE PARTNERSHIP, LTD. - Houston TX

International Classification:

G09F 13/04
G09F 13/06

US Classification:

40570

Abstract:

An exit sign includes an explosion-proof housing having a first chamber and a second chamber within the housing separated by a divider wall, a bottom plate attached to said housing and defining an interface between said housing and said bottom plate, and a window, disposed in said bottom plate, containing a clear glass or plastic window pane and located proximate to said first chamber of said housing, wherein a volume of said first chamber, a housing wall thickness surrounding said first chamber, a divider wall thickness, and a window pane thickness are arranged and designed according to an expected internal explosion pressure within said first chamber, and wherein a volume of said second chamber, a housing wall thickness surrounding said second chamber, and a divider wall thickness are arranged and designed according to an expected internal explosion pressure within said second chamber. The exit sign includes a generally planar sign panel coupled to said housing at said window, an indicium disposed on said sign panel, a plurality of light emitting diodes disposed within said second chamber of said housing and directed to shine light through said window into said sign panel, and at least one floodlight comprising one or more light emitting diodes directed to illuminate a region in proximity with said exit sign.