Robert H Fritz

US Patent:

7188385, Mar 13, 2007

Filed:

Sep 21, 2004

Appl. No.:

10/945495

Inventors:

Robert A. Fritz - Palm Harbor FL, US

International Classification:

A47L 13/12

US Classification:

15111, 15105, 15113, D4116, D4118, D4129

Abstract:

A utility brush including a plastic body with plastic bristles and a grip portion. A stainless steel pick device is molded into the grip portion of the plastic brush body which may be used as either a pick or a scraper.

US Patent:

59795638, Nov 9, 1999

Filed:

Feb 17, 1998

Appl. No.:

9/025102

Inventors:

Robert K. Fritz - Harrisburg PA

International Classification:

A62C 3500

US Classification:

169 5

Abstract:

A method and apparatus for providing pressurized water to a residential fire sprinkler system in the absence of electricity. The apparatus includes a double diaphragm pump operated from compressed nitrogen gas. The pump includes a housing containing a pair of flexible diaphragms mechanically connected and separating the housing into a pair of pressurized chambers and a pair of pumping chambers. The pressure chambers are connected to a supply of compressed nitrogen gas. The inlet to the pumping chambers is connected to any water supply and the outlet to the pumping chambers is connected to a residential fire sprinkler system. Compressed nitrogen gas is alternately supplied to the pressure chambers and alternately discharges the gas from the pressure chambers thereby causing water from the water supply to flow alternately into one of the pumping chambers and to be discharged alternately from the other pumping chamber for delivering pressurized water to the fire sprinkler system. An expansion tank is flow connected to the discharge line of the pumping chambers to balance the pressure in the discharge line whereby pulsing of the discharge water to the fire sprinkler system is eliminated.