Fred Edwin Sjogren

US Patent:

43611982, Nov 30, 1982

Filed:

Nov 21, 1980

Appl. No.:

6/209312

Inventors:

Fred E. Sjogren - Coos Bay OR

International Classification:

G01G 1910

US Classification:

177141

Abstract:

A horizontal table is provided for rigid support from a vehicle mounting portion and an upper plate including a downwardly directed peripheral flange is centered over the table and a diaphragm is sealingly secured to and extends between remote portions of the peripheral flange below the top plate and overlies and is supported from the table. The top plate is mounted from the table for limited vertical and horizontal shifting relative thereto and limited canting in all directions. A vertically elongated pop-off valve assembly is sealingly secured through a central portion of the table and includes an upwardly projectable piston plunger engageable with the underside of the top plate in response to the valve assembly being charged at its lower end and valve assembly includes structure operative to effect venting of the lower end thereof to the ambient atmosphere in response to upward movement of the plunger to its uppermost limit position.

US Patent:

41627105, Jul 31, 1979

Filed:

Nov 14, 1977

Appl. No.:

5/854311

Inventors:

Fred E. Sjogren - Coos Bay OR

International Classification:

G01G 1910
G01G 504

US Classification:

177141

Abstract:

A horizontal table is provided including a depending central support portion for rigid support from a vehicle mounting portion. An upper top plate including a downwardly directed peripheral flange is centered over the table and a diaphragm is sealingly secured to and extends between remote portions of the peripheral flange below the top plate and overlies and is supported from the table. The top plate and table include coacting structure guiding the top plate from the table for vertical movement relative thereto, limited horizontal shifting relative thereto and limited canting in all directions about a central zone of the table. A vertically elongated pop-off valve assembly is sealingly secured through a central portion of the table and includes an upwardly projectable piston plunger engageable with the underside of the top plate in response to the valve assembly being charged at its lower end and the assembly includes structure operative to vent the assembly to the ambient atmosphere in response to upward movement of the plunger to a predetermined level and to close the assembly against venting to the ambient atmosphere upon lowering of the plunger below the aforementioned predetermined level.