Duncan J Johnstone

US Patent:

6436289, Aug 20, 2002

Filed:

Oct 13, 2000

Appl. No.:

09/689639

Inventors:

Duncan Johnstone - McLean VA 22101

International Classification:

C02F 302

US Classification:

210620, 210758, 210776, 210170, 210220, 2102421, 2102422, 2102423, 2102571, 210258, 222105, 405 64, 405 66, 405 68

Abstract:

A vertical membrane storage system including a flexible membrane housing having an upper enclosed portion capable of storing a fluid and a lower open portion for receiving the fluid is disclosed. The storage system also includes a flotation tube disposed above and connected to the upper enclosed portion, and an anchor having receiving means for receiving a fluid disposed concentrically therein, whereby the anchor is connected to and encloses the lower open portion of the flexible membrane. The vertical membrane storage system can be used for storing a variety of fluids including, but not limited to, overflow sewage, oil-contaminated water, and the like.

US Patent:

6672048, Jan 6, 2004

Filed:

Jul 10, 2002

Appl. No.:

10/191278

Inventors:

Duncan Johnstone - McLean VA 22101

International Classification:

F02C 314

US Classification:

60 3935

Abstract:

The invention relates to a rotary impeller driven caturbine whereby relatively small engines are placed at or near the ends of at least two opposing impeller blades on a rotor. The engines propel the impeller blades to turn the rotor and shaft which in turns generates power. The engines are powered by a combustible reaction that produces steam, preferably by catalytic decomposition of hydrogen peroxide.

US Patent:

6726846, Apr 27, 2004

Filed:

Aug 8, 2002

Appl. No.:

10/214116

Inventors:

Duncan Johnstone - McLean VA 22101

International Classification:

C02F 302

US Classification:

210747, 210620, 210758, 210776, 210170, 210220, 2102421, 2102422, 2102423, 2102571, 210258, 222105, 405 64, 405 68, 405 66

Abstract:

A vertical membrane storage system including a flexible membrane housing having an upper enclosed portion capable of storing a fluid and a lower open portion for receiving the fluid is disclosed. The storage system also includes a flotation tube disposed above and connected to the upper enclosed portion, and an anchor having receiving means for receiving a fluid disposed concentrically therein, whereby the anchor is connected to and encloses the lower open portion of the flexible membrane. The vertical membrane storage system can be used for storing a variety of fluids including, but not limited to, overflow sewage, oil-contaminated water, and the like.

US Patent:

47356391, Apr 5, 1988

Filed:

Jun 9, 1986

Appl. No.:

6/872164

Inventors:

Duncan Johnstone - Lannon WI

Assignee:

Vacuum America Corporation - Lannon WI

International Classification:

B01D 4604
B01D 5000

US Classification:

55302

Abstract:

Vacuum loading apparatus is provided for ingesting a mixture of debris (such as particulate matter) and ambient air, for collecting the debris for disposal, and for filtering the ingested air before discharging it to atmosphere. The apparatus comprises three relatively light-weight, portable, independently movable modules, each incorporating a weeled chassis, to facilitate their movement to, from and on the jobsite, whereat they are interconnected for use by large flexible hoses. The power module comprises a motor-driven vacuum blower. The debris-receiver module comprises a receiver tank with a removable disposable debris-collection bag therein (which bag may or may not have an associated filter) and a debris-collection vacuum hose connected to the exterior thereof. The upper and lower ends of the receiver tank and the inside and outside of the bag are exposed to the same negative air pressure in the tank to prevent its collapse or damage by a pressure equalization duct. The filtration module, which is connected between the vacuum pump and the receiver tank by flexible hoses, comprises two filter tanks, each having a filter assembly therein, and further comprises selector valves which are operable to enable use of either or both filter tanks during normal vacuuming and also to enable purging either one of the filter tanks so that accumulated filtrate therein can be fed back to the debris-collection bag in the receiver tank.

US Patent:

40172813, Apr 12, 1977

Filed:

Oct 2, 1975

Appl. No.:

5/618945

Inventors:

Duncan Johnstone - Lannon WI

International Classification:

B01D 5000

US Classification:

55334

Abstract:

An industrial vacuum loader comprises an enclosed hopper into which particulate matter is drawn through a loading hose. The hopper is connected by a suction hose to the lower intake port of a bag house and the upper outlet port of the bag house is connected by a transformation hose to the suction port of an engine-driven positive displacement rotary blower. The bag house comprises an upper chamber containing filtration bags and a lower dust collection chamber in which dust filtered from dust-laden air passing through the bag house is collected. Means are provided to remove the collected dust from the dust collection chamber before the accumulation thereof adversely effects filtration capacity and comprises gates for selectively closing off the dust collection chamber from the upper chamber at a location below the inlet port of the bag house so as to isolate the dust collection chamber from the blower and enable build-up of substantially atmospheric rather than low pressure in the dust collection chamber and a dust duct for connecting the closed-off dust collection chamber to the enclosed hopper whereby the collected dust is sucked into the hopper as a result of the pressure differential between the dust collection chamber and the hopper.

Author:

Duncan Johnstone

ISBN #:

0140281002