Dust cup latch for cyclone separator vacuum

1. In a suction type vacuum cleaner comprising a housing with a cyclone separation chamber and a dust cup removably mounted beneath the cyclone separation chamber, the cyclone separation chamber having an inlet opening and an outlet opening; an exhaust conduit extending through the dust cup between the cyclone separation outlet opening and a discharge opening in a bottom wall of the dust cup; a latching mechanism positioned beneath the dust cup for raising dust cup into engagement with the cyclone separation chamber and for lowering the dust cup from engagement with the cyclone chamber, and a suction source having an inlet opening in communication with the exhaust conduit when the dust cup is in engagement with the cyclone separation chamber, an improved latching mechanism comprising:

an annular seal member mounted on the housing beneath the dust cup in sealing relationship with the dust cup and for selective movement between a raised position and a lowered position; and

a slide lock member in sliding engagement with the annular seal member, the slide lock member movable laterally along a slide axis between a latched and a release position relative to the housing to raise and lower the seal member and thus raise and lower the dust cup into and out of engagement with the cyclone separation chamber.

2. The latching mechanism of claim 1 and further comprising a filter case having a filter mounted therein and in fluid communication with the dirt cup discharge opening and with the inlet opening of the suction source, the filter case being removably mounted to the dirt cup.

3. The latching mechanism of claim 1 , wherein the slide-lock member movably mounts the annular seal member in guide slots.

4. The latching mechanism of claim 3 , wherein the housing has a pair of posts spaced from each other and the slide-lock member has a pair of channels that receive the posts to guide the movement of the slide-lock member with respect to the housing.

5. The latching mechanism of claim 4 , wherein the slide-lock member is generally U-shaped and includes a pair of spaced arms, and the channels are formed in the arms.

6. The latching mechanism of claim 5 wherein sidewalls of the slide lock arms are provided with tracks that extend at an acute angle to the slide axis and mount laterally extending arms of seal member.

7. The latching mechanism of claim 6 wherein the outer ends of the tracks are higher than their inner ends thereof whereby pushing the slide lock fully into housing forces the dust cup into sealing engagement with the cyclone separation chamber.

8. The latching mechanism of claim 7 wherein outer ends of the tracks level off to secure the seal in its fully raised position.

9. The latching mechanism of claim 4 wherein the slide-lock member further comprises a pair of guide slots at an upper surface thereof in registry with the channels, and the posts further comprise retainers that overly the guide slots to retain the slide-lock member on the posts.

10. The latching mechanism of claim 9 wherein the retainers are washers that are removably mounted to an upper portion of the posts.

11. The latching mechanism of claim 9 wherein the upper ends of guide posts include reduced-diameter bosses that ride in guide slots.

12. The latching mechanism of claim 11 wherein there are two posts that are received in each channel.

13. The latching mechanism of claim 12 wherein the limits of the movement of the slide-lock member with respect to the housing are defined by the position of the posts in the channels.

14. The latching mechanism of claim 9 and further comprising slot covers removably mounted on the slide-lock member over the guide slots.

15. The latching mechanism of claim 1 and further comprising friction latches between the slide-lock member and the housing to releasably retain the slide-lock member in the latched position.