Larry J Dehemmer

48676535, Sep 19, 1989

Jan 20, 1988

7/146472

John B. Mills - St. Paul MN
Vicky J. Peterson - Robbinsdale MN
Roger W. Young - Coon Rapids MN
C. Jeremy Crouch - Bloomington MN
Roman A. Schulz - Minneapolis MN
Irving F. Snyder - Minneapolis MN
Larry J. DeHemmer - Plymouth MN

Grace Inc. - Minneapolis MN

F04B 3914

417360

A double-diaphragm pump is designed to be molded almost entirely out of plastic and is provided with totally externally-accessible and serviceable check valves which do not require any significant disassembly of the pump itself. The pump is also fitted with a diaphragm which is formed from a uniform thickness of material and which have convolutions which are equally disposed on either side of the angle of elevation of the unstressed diaphragm. The pump is designed for mounting on top of a barrel or drum and has a set of radiused feet so as to fit snugly against the rim in an inlet pipe which fits into a bung plug having an eccentric opening such that the opening grips the inlet pipe and the plug may be rotated so as to snugly position the pump against the rim of the drum. The air valve to the pump is provided with U-cup seals in the housing. The spool of the pump moves in such a fashion so that the transitional area between the open and closed positions contacts the open end of the U-cup rather than the closed end as is traditional.

48876399, Dec 19, 1989

Jul 18, 1988

7/221024

Richard D. Lewis - Bloomington MN
James P. Korzenowski - Minneapolis MN
Larry J. DeHemmer - Plymouth MN

Graco Inc. - Minneapolis MN

G05D 1608

13750541

The pressure regulator is designed for use with materials which are particularly subject to degradation such as metallic paints. The construction of the device allows for maintenance of laminar flow throughout the device. A circular disk is located a variable distance from the upper side of the pressure reducing chamber and leads to annular spaces around the stem of the disk, the clearance is being such as to maintain laminar flow.