Fluid handling – Systems – Multi-way valve unit
Patent
1992-10-13
1995-01-03
Michalsky, Gerald A.
Fluid handling
Systems
Multi-way valve unit
91275, 91313, 91337, 13762566, 251 47, 417395, F15B 1301, F04B 912
Patent
active
053777190
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a pneumatic valve designed to control particularly a compressed-air-operated membrane pump and is set forth in detail in the preamble of patent claim 1.
U.S. Pat. No. 3,465,686 discloses an air-operated hydraulic pump using a shuttle valve, the shuttle of which is effected in all positions by very strong permanent magnets mounted in the valve housing adjacent the ends of the shuttle. The idea with this valve is to influence the shuttle in any position, i.e. even any intermediate position, so that the shuttle operates fully from end to end. For achieving such a great attractive force and yet render the valve operative, the magnets are spaced from the ends of the shuttle. This is obligatory and extremely critical, as a gap as narrow as 0.5 mm creates only 1/10 of the retaining power of a gap equal to 0 mm, i.e. when physical contact has been established between the shuttle and one of the permanent magnets. If the control air is designed to move the shuttle from one end position to the other at a pressure of ten pounds per square inch, it will certainly not when physical contact has been established between the shuttle and a permanent magnet and a releasing force of one hundred pounds per square inch will be required. It goes without saying that this previously known valve requires very accurate tolerances and will seize to function whenever there is a light play or, after some time of operation, a certain natural wear and tear.
Furthermore, this valve will create a high level of noise, as the strong magnets will make the shuttle bounce from one seat on to the other, in which connection O-rings alledgedly intended to reduce noise necessarily must render the extremely important accurate size of said gap between shuttle and permanent magnets variable and thus creating a non-desired varying influence on the retaining power due to the material used for the O-rings and not to forget varying conditions of operation and wear and tear.
The object of the invention is to improve and develop valves already known in this field, in order to avoid in particular the aforementioned drawbacks as well as other drawbacks and achieve high reliability, which will be explained in more detail in the following description.
These objects are attained according to the invention by design of the valve disclosed hereinafter.
Additional characterizing features and advantages of the present invention are set forth in the following description, reference being made to the accompanying drawings, in which:
FIG. 1 shows a conventional pneumatic view, mainly in a diametrical longitudinal section, in one of two functional positions;
FIG. 2 shows a corresponding view of the same valve, its plunger being placed in an ineffective or locking intermediate position;
FIG. 3 is a view which corresponds to FIG. 1 and shows a valve according to the present invention;
FIG. 4 is a view which corresponds to FIG. 1 and shows another embodiment of a valve according to the invention;
FIG. 5 is a perspective view of a preferred embodiment of a plunger, designed to form a part of the valves according to FIGS. 3 and 4; and
FIG. 6 shows a partly schematic partial section of a membrane pump, provided with a valve according to the invention.
The present invention relates primarily to a main valve, i.e. a 3-way/5-gate-valve, which is pneumatically controlled and designed e.g. for compressed-air-operated membrane pumps.
Said valve mainly comprises a valve body 1, body ends 2, a plunger 5 and five connection gates 8, 9, 10, 11 and 12, which are disposed in said valve body, as well as a control air gate 13 and 14 respectively in each one of said two ends 2 respectively. Said ends are attached to the valve body by means of screws 3.
FIG. 1 shows a conventional valve with a presently used design, plunger 5 being disposed in a valve cap 4 having requisite O-ring seals 6 and 7 respectively. Plunger 5 is actuated through gate 13 or 14 by a compressed-air-impulse, which subsequently to the work done is exhausted. FIG. 1 shows plunger 5 in its
REFERENCES:
patent: 3304126 (1967-02-01), Rupp et al.
patent: 3455329 (1969-07-01), Roth
patent: 3465686 (1969-09-01), Nugier
patent: 3592230 (1971-07-01), Piroutek
patent: 3847371 (1974-11-01), Norton et al.
patent: 4203571 (1980-05-01), Ruchser
patent: 4543977 (1985-10-01), Arav
Blomquist, legal representative, heir by Lena H.
Gyllinder, deceased Lars
Gyllinder, legal representative, heir by Anne Marie
Gyllinder, legal representative, heir by Britt
Dominator Maskin AB
Michalsky Gerald A.
LandOfFree
Pneumatic valve, particularly for control of compressed-air-oper does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pneumatic valve, particularly for control of compressed-air-oper, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pneumatic valve, particularly for control of compressed-air-oper will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2204568