An engagement member, which is detachably securable to the liquid outlet nipple of a filter receiving fitting, is movably carried by a filter housing which also carries an annular seal which resides against the sealing surface of the fitting. An actuating rod extending from the engagement means is received at one end of a lever which is pivotally secured to the housing. In response to movement of the lever, the housing moves relative the engagement member and the seal is separated from the sealing surface.
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1. In a liquid filter device for use in combination with a filter-receiving fitting,
which fitting includes a liquid outlet inlet nipple, a coaxial sealing surface, and a liquid return outlet opening intermediate the nipple and the sealing surface, and which filter device includes a hollow housing having an open end and a closed end and containing filter medium, engagement means detachably securable with the nipple, and a seal member carried by the housing proximate the open end and sealingly received against the sealing surface in response to securement of the engagement means with the nipple,
improvements therein for facilitating removal of said filter device from said fitting, said improvements comprising: (a) first means moveably coupling said engagement means to said housing; and (b) second means for selectively moving said housing relative said engagement means including release means normally residing in a first position in which said seal member resides in sealing engagement with said surface and moveably to a second position in which said seal member is spaced from said surface. 6. In a liquid filter device for use in combination with a filter-receiving fitting,
which fitting includes a liquid outlet inlet nipple, a coaxial sealing surface, and a liquid return outlet opening intermediate the nipple and the sealing surface, and which filter device includes a hollow housing having an open end and a closed end and containing filter medium, engagement means detachably securable with the nipple, and a seal member carried by the housing proximate the open end and sealingly received against the sealing surface in response to securement of the engagement means with the nipple,
improvements therein for facilitating removal of said filter device from said fitting, said improvements comprising: (a) first means moveably coupling said engagement means to said housing for relative linear movement between said engagement means and said housing along an axis which is parallel to the longitudinal axis of said nipple; (b) drive means interacting between said housing and said engagement means whereby said engagement means is rotatable in response to rotation of said housing; and (c) second means for selectively moving said housing relative said engagement means whereby said seal member is separated from said sealing surface. 13. In a liquid filter device for use in combination with a filter-receiving fitting,
which fitting invludes includes a liquid outlet inlet nipple, a coaxial sealing surface, and a liquid return outlet opening intermediate the nipple and the sealing surface, and which filter device includes a hollow housing having an open end and a closed end and containing filter medium, engagement means detachably securable with the nipple, and a seal member carried by the housing proximate the open end and sealingly received against the sealing surface in response to securement of the engagement means with the nipple,
improvements therein for facilitating removal of said filter device from said fitting, said improvements comprising: (a) first means moveably coupling said engagement means to said housing including; (i) a socket carried by said housing, and (ii) an engagement member carrying said engagement means telescopingly residing within said socket; and (b) second means for selectively moving said housing relative said engagement means whereby said seal member in separated from said sealing surface including: (i) a lever pivotally carried by said housing said lever normally in a retracted position and selectively movable to an extended position, (ii) an actuating member interconnecting said lever with said engagement member for moving said engagement member in a direction toward the open end of said housing as said lever is moved toward said extended position. 2. The filter device of
3. The filter device of
(a) a lever pivotally carried by said housing; said lever normally residing in a retracted position and selectively movable to an extended position; and (b) an actuating member interconnecting said lever with said engagement means whereby said housing is moved relative said engagement means to separate said seal member from said surface in response to movement of said lever to said extended position.
4. The filter device of
5. The filter device of
7. The filter device of
8. The filter device of
9. The filter device of
10. The filter device of
(a) a lever pivotally carried by said housing; which lever normally residing in a retracted position and selectively movable to an extended position; and (b) an actuating member interconnecting said lever with said engagement means whereby said housing is moved relative said engagement means to separate said seal member from said surface in response to movement of said lever to said extended position.
11. The filter of
12. The filter device of
14. The filter device of
(a) a first end moveably coupled to said actuating member; (b) a second end having integral hand grip means; and (c) means intermediate said end for pivotal securement to said housing.
15. The filter device of
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1. Field of the Invention
This invention relates to filters.
More particularly, the present invention relates to filters of the type for removing contaminates from circulating liquid such as the lubricating system of an internal combustion engine.
In a further and more specific aspect, the immediate invention concerns an improved filter device which is readily removable from the filter receiving fitting.
2. The Prior Art
The desirability of installing a filter in certain liquid circulation systems is well established. Exemplary is the lubricating system of an internal combustion engine. As a result of normal functioning, and greatly increased under adverse operating conditions, various contaminates become entrained in the lubricating oil. Removal of foreign material is mandatory to prevent accelerated wear and damage to the mechanism.
The contemporary filter particularly adapted for use in connection with systems of the above type is usually in the form of a self-contained and disposable unit. While commercially available in an array of specific configurations, the typical filter includes a relatively thin walled, cylindrical housing having a closed end and an open end. Carried at the open end are axially located engagement means, generally an internally threaded bore, and a coaxial annular seal. Filter medium, such as fibrous material, reside within the housing.
For detachable securement of the filter, the circulation system is provided with a filter-receiving fitting. Commonly, the fitting includes a liquid outlet the openings 39 as indicated by the arrowed line A Band return through the opening 39 nipple 38 intermediate nipple 38 and sealing surface 37 as indicated by the arrowed line B A. Again, a thorough and complete understanding will be immediately had by those skilled in the art.
The improvements of the instant invention, in accordance with a preferred embodiment thereof as seen with reference to FIGS. 1 and 8, include an engagement member, generally designated by the reference character 40 having outer sidewall 42 and threaded bore 43. Engagement member 40 further includes spider bracket 44, of which further description will be made presently. Socket 45 terminating with shoulder 47 is formed into tubular member 29 from the open end of housing 20.
Engagement member 40 is telescopingly movable within socket 45 along an axis which is substantially parallel to the longitudinal axis of nipple 38 which is indicated by the broken line C. Engagement member 40 is also drivingly engaged with socket 45 such that rotation of housing 20 results in concurrent rotation of engagement member 40. For this purpose, outer sidewall 42 and socket 45 have mating hexagonal cross-sections as specifically illustrated in FIG. 8. Alternate structure for achieving the desired results will readily occur to those skilled in the art. For example, outer sidewall 42 and socket 45 may be cylindrical and drivingly engaged by means of a key carried by one of the elements and a key receiving groove carried by the other.
Tubular guide 48 carrying annular seal 49, such as a convention O-ring, extends into housing 20 from domed endwall 23 as best seen with reference to FIGS. 1 and 2A. Preferably, tubular guide 48 extends along the axis. Recess 50, as seen with additional reference to FIG. 3, is formed into domed endwall 23 to extend substantially radially outward from tubular guide 48. Recess 50 is pressed into endwall 23 to form a pair of spaced apart sidewalls 52 and 53. Lever 54 having inner end 55 and outer end 57 is pivotally affixed to housing 20 by pin 58 carried by sidewalls 52 and 53. Preferably, lever 54 is in the form of a generally U-shaped stamping having depending tabs 59 through which pin 58 passes.
Actuating rod 60 extends through tubular guide 48 and is in fluid-tight engagement with the seal 49. Actuating rod 60 extends from a lower end 62 which is secured to spider bracket 44 to an upper end 63 which is pivotally affixed to the inner end 55 of lever 54 as seen with further reference to FIG. 4. To allow for relative of movement between the members lever 54 is provided with elongate slot 65 which receives pin 64.
FIG. 2A illustrates lever 54 as it would appear in the normal or retracted position wherein outer end 57 lies in closs proximity to the surface of recess 50 and inner end 55 is spaced from endwall 23. Retention member 67 spans recess 50 over lever 54 and normally retrain lever 54 in the retracted position. Retention member 67 may take alternate forms such as a flexible sheet member which is adhesively secured to the surface of endwall 23 or a thin metallic member which is bonded, as by spot welding, to the surface of endwall 23. In either case, retention member 67 is manually removable preferably in response to manually urged movement of outer end 57 in a direction away from recess 50.
Outer end 57 of lever 54, which is preferably upwardly curved, functions as hand grip means to facilitate lifting and pivoting member 54 about pin 58 as indicated by the arcuate arrowed line D in FIG. 2B. In response thereto, inner end 55 moves in the direction indicated by the arcuate arrowed line E. As is obvious, acutating rod 60 is stationary and immovable. Accordingly, housing 20 is lifted, by pin 58, in the direction indicated by the arrowed line F. The movement of housing 20 separates annular seal 27 from sealing surface 37. The manual pressure applied to lever 54 is sufficient to overcome the bonding action between seal 27 and surface 37 as the result of sediment, heat or other factors With the seal thus broken housing 27 is easily manually rotated for disengagement of engagement member 40 from nipple 38.
Reference is now made to FIG. 6 which illustrates an alternate embodiment of the invention including housing 70 having endwall 72 and further including actuating rod 73. Endwall 72 is generally analogous to previously described endwall 23 except for the inclusion of recess 50. Similarly, actuating rod 73 is analogous to previously described actuating rod 60 except that the upper end 74 is terminated by a substantially planar surface. An understanding of further structure not specifically illustrated can be had with reference to the previously described embodiment.
Shown in the retracted position is lever 75 having inner end 77 and outer end 78. Ear 79 projects upwardly from surface 72 at an intermediate location along the length of lever 75. Link 80 is pivotally connected to ear 79 by pin 82 and to lever 75 by pin 83. It is noted that the location of pin 83 is outboard of the location of pin 82. Bail 84 is pivotally carried by a second ear 85 upstanding from surface 72 proximate the outer end 78 of lever 75. Bail 84 engages and retains lever 75 in the retracted position. Arcuate camming surface 87 bears against the end 74 of actuating rod 73.
In preparation for removal of the immediate embodiment of the filter device from the filter receiving fitting, bail 84, which acts as a retention element, is first removed from the lever 75 in response to outboard actuate movement as indicated by the arcuate arrowed line G. End 78 of lever 75 is then manually lifted in a direction indicated by the arcuate arrowed line H urging lever 75 into the extended position as seen in FIG. 6B. During the movement of lever 75, surface 87 of lever 75 cammingly moves against the surface 75 of actuating rod 73. Concurrently, force transmitted through link 80 lifts housing 70 in the direction indicated by the arrowed line I. Accordingly, seal 27 is separated from surface 37 and the removal of the filter device continues as previously described.
A further embodiment of the immediate invention will now be described with reference to FIGS. 7A and 7B. Similar to the previously described embodiments, the immediate embodiment includes a hollow housing, generally designated by the reference character 90 having cylindrical sidewall 92 and a closed end defined by domed endwall 93. The immediate embodiment also includes previously described actuating rod 73 having upper end surface 74. For aspects of the immediate embodiment not specifically illustrated and described, with the exception of the detailed description below, reference is made to the previous embodiments.
Recess 94 is formed into endwall 93 to extend generally radially outward. A pair of opposed tabs 95 project upwardly from surface 93 at an intermediate location along the length of recess 94. A tab 95 resides on either side of recess 94. Lever 97 having inner end 98 and outer end 99 passes between and is pivotally to tabs 95 by pin 100. Arcuate camming surface 102, carried on inner end 98, bears against end 74 of actuating rod 73. Finger ring 103 is carried at outer end 99. Retention member 67, previously described, retains lever 97 in the retracted position as illustrated in FIG. 7A. To move lever 97 to the extended position to separate seal 27 from surface 37, retention member 67 is fractured or removed and outer end 99 lifted, by finger ring 103, in the direction indicated by the arrowed line J. In response to the movement of lever 97, housing 90 moves in a direction indicated by the arrowed line K as previously described, especially in connection with the embodiment of FIGS. 6A and 6B.
Reference is now made to FIG. 9 wherein there is seen an alternate lever structure which for purposes of illustration is shown in combination with a housing generally designated by the reference character 110 having domed endwall 112. In accordance with the immediately preferred, there is provided a lever 113 having inboard end 114 and outboard end 115. T-bar 117, the functional equivalent of finger ring 103, extends perpendicularly through lever 113 proximate end 115. In the retracted position as shown, lever 113 resides entirely within recess 118 formed in endwall 112. Lever 113 is pivotally connected to endwall 112 by a pin carried by the sidewalls of recess 118 as previously described in connection with the pin 58 specifically seen in FIG. 3 Although not specifically illustrated, inner end 114 of lever 113 is provided with a camming surface such as previously described camming surface 87 and 102, for contact with the end 74 of actuating rod 73. As will be appreciated by those skilled in the art, actuating rod 73 is somewhat shortened for use in connection with the immediate embodiment wherein the lever resides entirely within the recess. For an understanding of structure and function not specifically illustrated, reference is made to the previously described embodiments.
Various changes and modifications to the embodiments herein chosen for purposes of illustration will readily occur to those skilled in the art. To the extent that such modifications and variations do not depart from the spirit of invention, they are intended to be included within the scope thereof which is assessed only by a fair interpretation of the following claims.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Jul 10 1991 | Zipoff Oil Filter Inc. | (assignment on the face of the patent) | / |
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