Robert J Holland

US Patent:

D574947, Aug 12, 2008

Filed:

Nov 21, 2007

Appl. No.:

29/297913

Inventors:

Phillip R. Grisham - Dallas TX, US
Robert Bradley Holland - Rowlett TX, US

Assignee:

Air Vent, Inc. - Dallas TX

International Classification:

2304

US Classification:

D23393

US Patent:

8292707, Oct 23, 2012

Filed:

Nov 21, 2007

Appl. No.:

11/943936

Inventors:

Phillip R. Grisham - Dallas TX, US
Robert Bradley Holland - Rowlett TX, US

Assignee:

Air Vent, Inc. - Dallas TX

International Classification:

F24F 7/02

US Classification:

454260

Abstract:

An off-peak intake vent includes spaced top and bottom walls defining a cavity therebetween and a pair of lateral side walls. The bottom wall has a generally planar bottom surface having at least one vent opening formed therethrough for communicating with an opening in a roof deck. The top wall has a curved portion that converges with the bottom wall at an uphill edge of the intake vent. The intake vent also includes air intake louvers defined between the top and bottom walls.

US Patent:

20130023197, Jan 24, 2013

Filed:

Sep 28, 2012

Appl. No.:

13/629917

Inventors:

Air Vent, Inc. - Dallas TX, US
Robert Bradley Holland - Rowlett TX, US

Assignee:

AIR VENT, INC. - Dallas TX

International Classification:

F24F 7/02

US Classification:

454260

Abstract:

An off-peak intake vent includes spaced top and bottom walls defining a cavity therebetween and a pair of lateral side walls. The bottom wall has a generally planar bottom surface having at least one vent opening formed therethrough for communicating with an opening in a roof deck. The top wall has a curved portion that converges with the bottom wall at an uphill edge of the intake vent. The intake vent also includes air intake louvers defined between the top and bottom walls.

US Patent:

43545548, Oct 19, 1982

Filed:

Apr 21, 1980

Appl. No.:

6/142096

Inventors:

Michael B. Calhoun - Carrollton TX
Robert L. Holland - Ventura CA
Paul D. Scott - Carrollton TX

Assignee:

Otis Engineering Corporation - Dallas TX

International Classification:

E21B 3410
E21B 3416
E21B 4312

US Classification:

166321

Abstract:

A wire line removable well safety valve in an oil and gas well completion design including a tubing string, a well packer around the tubing string sealing with the well casing, and a submergible well pump on the tubing string below the packer. The safety valve controls flow of pumped well fluids through the tubing string, directs separated gas into the casing annulus around the tubing string above the packer, and shuts off the flow of pumped fluids and separated gas to the surface while permitting recirculation of pumped well fluids between the annulus and tubing string below the packer. The safety valve includes a housing having separate central and annular flow passages for pumped fluids and separated gas, respectively, a ball valve for controlling flow of pumped fluids in the central flow passage, an annular bypass valve for controlling flow of separated gas along the annular flow passage, and a recirculating valve between the central and annular flow passages for recirculation of pumped fluids when the ball and bypass valves are closed. The safety valve is held open hydraulically from the surface and includes means for closing the valve when hydraulic pressure fails, shutting off the flow of pumped fluids and bypass gas while permitting continuous operation of the well pump by recirculating pumped fluids below the packer.