DE1611121C

DE1611121C - Screw-on liquid filter

Info

Publication number: DE1611121C
Application number: DE19671611121
Authority: DE
Original assignee: Purolator, Ine , Rahway, NJ (V St
Priority date: 1966-07-22
Filing date: 1967-07-22
Publication date: 1973-06-14

Description

weg zum Ventil 17 zu erhalten. Das offene Ende 11 b des Gehäuses wird nach dem Einsetzen der Filterpatrone 12 durch die Abdeckung 23 verschlossen, welche aus der Verstärkungsplatte 24 und der Abdeckplatte 25 besteht. Der äußere Rand 24 a der Verstärkungsplatte 24 besteht aus ziemlich dickem Blech, der Innenteil der Verstärkungsplatte 24 ist relativ zum Gehäuse 11 konvex und enthält mehrere Einlaßöffnungen 24 c. Der mittlere Teil der Verstärkungsplatte 24 ist mit einem Gewinde 24 d versehen und ragt in das Innere des Gehäuses hinein.get away to valve 17. After the insertion of the filter cartridge 12, the open end 11 b of the housing is closed by the cover 23, which consists of the reinforcement plate 24 and the cover plate 25. The outer edge 24 a of the reinforcing plate 24 consists of fairly thick sheet metal, the inner part of the reinforcing plate 24 is convex relative to the housing 11 and contains several inlet openings 24 c. The middle part of the reinforcement plate 24 is provided with a thread 24 d and protrudes into the interior of the housing.

Die Abdeckplatte 25 besteht aus einem äußeren Band 25 a, dem inneren Band 25 £> und der Rinne 25 c, die von den Bändern abgestützt wird. Jedes der Bänder hat im wesentlichen Kegelstumpfform und konvergiert gegen die Befestigungslinien an der Rinne 25c. Wie aus Fig.2 ersichtlich, halten die Bänder die Rinne 25 c im Abstand von der Verstärkungsplatte 24. Die Abdeckplatte 25 weist ferner mehrere Rohrstutzen 2Sd auf, weiche sich in jede der Einlaßöffnungen 24 c in der Verstärkungsplatte erstrecken.The cover plate 25 consists of an outer band 25 a, the inner band 25 £> and the channel 25 c, which is supported by the bands. Each of the bands is generally frustoconical in shape and converges against the lines of attachment on the channel 25c. As can be seen from FIG. 2, the bands hold the channel 25 c at a distance from the reinforcement plate 24. The cover plate 25 also has a plurality of pipe stubs 2Sd which extend into each of the inlet openings 24 c in the reinforcement plate.

Vor der Befestigung der Abdeckung 23 auf dem Gehäuse wird eine Scheibe 26 aus biegsamem Material rund um die Außenwand 24 e des Gewindes 24 d angeordnet, so daß sich die Scheibe über die öffnungen erstreckt, welche durch die Rohrstutzen 25 d und die Oberseite des Randes 24 α der Verstärkungsplatte gebildet werden. Eine Membranfeder 27, welche sich von der Leitung 14 a in radialer Richtung erstreckt, drückt auf die Scheibe 26, so daß diese dieBefore the cover 23 is fastened to the housing, a disk 26 made of flexible material is arranged around the outer wall 24 e of the thread 24 d so that the disk extends over the openings which are made through the pipe socket 25 d and the top of the rim 24 α of the reinforcement plate are formed. A diaphragm spring 27, which extends from the line 14 a in the radial direction, presses on the disc 26, so that this the

ίο öffnungen verschließt.ίο closes openings.

Die Abdeckplatte kann aus einem verhältnismäßig dünnen Blech bestehen, das mit dem Gehäuse 11 verwalzt wird, wodurch eine ausreichende Abstützung der Verstärkungsplatte 24, die aus verhältnismäßig dickem Blech bestehen kann, ermöglicht wird. In der Rinne 25 c ist ein Dichtungsring 28 aus elastischem Material angeordnet. Bei schlechter Ausrichtung oder Verzerrung der Lagerfläche des Motors kann die Rinne 25 c relativ zur Verstärkungsplatte 24 abgelenkt werden, da sie durch die inneren und äußeren Bänder 25 a und 256 elastisch gegen die Verstärkungsplatte 24 abgestützt ist.The cover plate can consist of a relatively thin sheet metal that is rolled with the housing 11, whereby sufficient support of the reinforcement plate 24, which can consist of relatively thick sheet metal, is made possible. In the channel 25 c , a sealing ring 28 made of elastic material is arranged. In the event of poor alignment or distortion of the bearing surface of the motor, the channel 25 c can be deflected relative to the reinforcement plate 24, since it is elastically supported against the reinforcement plate 24 by the inner and outer bands 25 a and 256.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

Claim:

Screw-on liquid filter, consisting of a housing with an open end, which is closed by a reinforcement plate with at least one inlet opening and a central outlet opening, which is in connection with the central return flow channel of a filter element arranged in the housing, the reinforcement plate being externally supported by a die central outlet opening of the reinforcing plate comprehensive cover plate is superimposed, which is attached with its circumference at the end edge of the filter housing and carries on its outside an annular seal which is pressed when screwing the filter against the filter bearing surface and seals the filter inlet to the outside, characterized in that the Cover plate (25) is lifted from the reinforcement plate (24) in the area of the ring seal (28) and has several pipe sockets (25 d) on its radially inner section, which are inserted into the inlet openings (24 c) provided in the verse in the same number The reinforcing plate (24) extend in and form an elastic holder for the cover plate area lifted off the reinforcing plate.

The invention relates to a screw-on liquid filter, which consists of a housing with an open end is formed by a reinforcement plate with at least one inlet opening and a central outlet opening is completed with the central return channel one in the Housing arranged filter element is in connection, the reinforcing plate outside of a cover plate encompassing the central outlet opening of the reinforcement plate is superimposed, which is attached with its circumference on the end edge of the filter housing and on its outside carries a ring seal which is pressed against the filter bearing surface when the filter is screwed on and seals the filter inlet to the outside.

From U.S. Patent 3232437 is a Liquid filter known, the reinforcing plate of which the outside of the central outlet opening of the Reinforcing plate comprehensive cover plate is superimposed with its circumference at the end Edge of the filter housing is attached and carries a ring seal on its outside, which when screwed on of the filter is pressed against the filter bearing surface. The ring seal is in a groove of the Cover plate arranged, the bottom of which is supported against the reinforcement plate. With such liquid filters has been found that with consideration of the rigid support of the sealing ring and the cover plate against the reinforcement plate often do not have a sufficient seal between them reach the motor housing and the lower end of the liquid filter screwed onto it leaves. The known liquid filter also have the disadvantage that the cover plate is only as Ring is formed, which extends from the outer circumference of the housing only to the area around the axial Outlet opening arranged inlet openings extends. This arrangement allows the cover plate Support radially inward only through the annular groove against the reinforcement plate in which the Ring seal is arranged. If the reinforcement plate is subjected to torsion under high pressure, the cover plate and the sealing ring thus follow these "twists", which leads to leaks can lead to the motor housing.

ίο The invention is based on the object that to improve known liquid filter of the type mentioned so that even with different Pressure ratios and unfavorable conditions on the contact surface of the motor housing a perfect Sealing of the filter housing against the motor housing is guaranteed.

The solution to this. There would be that the cover plate in the area of the ring seal of the Reinforcing plate is lifted off and a plurality of pipe sockets on its radially inner section has, soft in the provided in the same number of inlet openings in the reinforcement plate extend into it and an elastic holder for the cover plate area lifted from the reinforcement plate form. This ensures that the sealing ring and the sealing groove in the Cover plate is independent of twisting of the reinforcement plate and is under the pressure of the Filter housing screwed onto the motor housing the surface of the motor housing evenly everywhere can create.

To further explain the invention, reference is made to an embodiment shown in the drawing referenced. It shows

F i g. 1 a plan view of the closed end part of the filter,

2 shows a vertical partial longitudinal section level 2-2 of FIG. 1,

Fi g. 3 a plan view of the lower end of the filter,

F i g. 4 shows a vertical partial longitudinal section through the lower part of the filter.

The filter 10 comprises a housing 11 having a closed end 11a and an open end portion 11 b. In the housing 11 a filter cartridge 12 made of folded filter paper 12 a is arranged, which is held between end caps 13 and 14. The annular filter cartridge 12 encloses the interior 15 of the housing, which is delimited by a perforated tube 16 against which the folds of the filter cartridge 12 are supported.

The end cap 13 has an annular flange 13 α, de.r rests against the inside of the tube 16. On the flange a U-shaped valve body 17 is secured α which b through the bottom 17 of the pressure relief valve is finished 17th The valve opening 136 in the flange 13 a is arranged adjacent to the annular valve seat 13 c of the pressure relief valve 17. The valve 17 is provided with a valve disk 17 c which is pressed by the spring 17 d against the seat 13 c. The spring 17 d is supported by the bottom 17 b of the housing • 17 α .

When assembling the filter 10, the filter patroie 12 is arranged within the housing 11, and the end cap 13 is fitted into engagement with the bow spring 22. The pen is with an opening 22 a, to ensure an unobstructed flow