Fluid handling – Systems – Multi-way valve unit
Patent
1992-02-10
1994-03-22
Nilson, Robert G.
Fluid handling
Systems
Multi-way valve unit
92 62, 137563, 251 634, 425562, F16K 1107
Patent
active
052955087
ABSTRACT:
The mixing apparatus, which is constructed like a known mixing apparatus with return grooves (18, 19) in the control piston (2), has return grooves (18, 19) of a length which is equal to the distance between the inlet and return openings (4to 7) to be connected by it, the control piston (2) being able to be moved into an intermediate position (B), in which the return grooves (18, 19) connect the inlet openings (4, 5) to the assigned return openings (6, 7), and into a further advanced clearing position (C), in which the return grooves are no longer connected to the return openings. Due to the short return grooves, the length of which is no longer dependent o the length of the mixing chamber or of the outlet pipe of the mixing chamber, the overall length of the mixing apparatus is shortened. It is then only twice the stroke of the control piston. The neck region of the control piston is shortened, as a result of which the area of adhesion is reduced. With a long run-out pipe, the mixing apparatus is nevertheless short.
REFERENCES:
patent: 3706515 (1972-12-01), Keuerleber et al.
patent: 3799199 (1974-03-01), Rumpff
patent: 3964731 (1976-06-01), Ernst
patent: 4854713 (1989-08-01), Soechtig
Elastogran Polyurethane GmbH
Nilson Robert G.
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