Multi-purpose vacuum cleaner nozzle

• US 3,913,168 A
• Filed: 11/19/1973
• Issued: 10/21/1975
• Est. Priority Date: 11/22/1972
• Status: Expired due to Term

• Current Assignee: Kjell Ake Vilhelm Lovgren
• Original Assignee: Kjell Ake Vilhelm Lovgren
• Inventors: Lovgren, Kjell Ake Vilhelm
• Primary Examiner(s): Roberts, Edward L.
• Application Number:
  US05/417,413
• Time in Patent Office: 701 Days
• Field of Search: 15/319,368,371
• US Class Current: 15/319
• CPC Class Codes: A47L 9/06 with fixed, e.g. adjustably fixed brushes or the like
• CPC Class Codes: A47L 9/0646 with pneumatic actuation

Abstract

A vacuum cleaning device having a stationary and a movable working member. The movable working member is shiftable between two end positions by means of a shifting device. The latter includes an operating diaphragm dependent upon the negative pressure prevailing in the vacuum cleaner nozzle and defining a chamber communicating with the suction channel of the nozzle and supporting the movable working member. The device is provided with at least one slide arranged to move between two end positions and being associated with blocking parts, the slide being so constructed and arranged that a working member is blocked by the blocking parts in at least one end position of the slide.

Claims

1. In a multi-purpose vacuum cleaner nozzle comprising a housing having a suction channel, a stationary and a movable working member in said housing, said movable working member being adapted to move between upper and lower positions with respect to said housing and comprising a pneumatically operable shifting device dependent upon a source of supply of air at a partial vacuum, said shifting device including a diaphragm operated by the pressure of said partial vacuum and at least partially defining a space communicating with said suction channel, a plate in said housing and provided with at least two spaced abutment structures thereon, said diaphragm supporting said movable working member and said plate, the invention comprising at least one slide movable between two end positions in said housing, a pair of spaced blocking means mounted on said slide, each of said blocking means in one end position of said slide co-acting with a respective one of said abutment structures, the latter blocking the movement of said plate and said movable working member in said one end position, and in the other end position of said slide the latter assumes a position in which the plate is capable of free movement relative to movements of said diaphragm.

2. A vacuum cleaner nozzle as set forth in claim 1 further comprising a second slide, a second pair of spaced blocking means mounted on said second slide, and a pair of additional elements on said plate arranged to co-act with a respective one of said second blocking means in one end position of saiD second slide to thereby block the movement of said movable working member in another position thereof.

3. A vacuum cleaner nozzle as set forth in claim 2 wherein said elements are hook-shaped parts.

4. A vacuum cleaner nozzle as claimed in claim 3 wherein said hook-shaped parts are constituted of a slightly resilient material.

5. A vacuum cleaner nozzle as claimed in claim 2 further comprising a common operating device for selectively moving said slides to positions in which said movable working member is blocked, and spring means associated with said slides for moving said working member to a release position.

6. A vacuum cleaner nozzle as claimed in claim 7 wherein said operating device is connected to said slides whereby said device can assume a selected one of three positions;

the first position being a condition whereby said one slide is in its blocking end position while the second slide is unaffected, the second position being a condition in which said second slide is in its blocking end position and said one slide is unaffected, and the third position being a condition in which both slides are unaffected.

7. A vacuum cleaner nozzle as claimed in claim 6 wherein said third position results in a further condition in which both slides rest against said operating device by means of the forces applied by said spring means, and said operating device thus creating the unblocking positions of the slides.

8. A vacuum cleaner nozzle as claimed in claim 7 wherein said housing is provided with a part having an opening through which said operating device projects, said operating device having a guide pin, a structure on said plate provided with a guide surface having notches forming said three positions, and said guide pin being adapted to be selectively seated in one of said notches, said guide surface being resilient in a direction perpendicular to the direction of movement of said operating device.

9. A vacuum cleaner nozzle as set forth in claim 2 wherein said second blocking means are stop parts extending downwardly from said housing.

10. A vacuum cleaner nozzle as set forth in claim 9 further comprising a spring positioned between said plate and said housing, and one end of said spring being fitted into a portion of a corresponding stop part so that movement of said movable working member from the lower position to the upper position will be against spring pressure.

11. A vacuum cleaner nozzle as set forth in claim 1 wherein said spaced blocking means rests against the top of said abutment structure when said one slide is in said one end position.

12. A vacuum cleaner nozzle as claimed in claim 1 each of wherein said blocking means is constituted of a resilient material.

13. A vacuum cleaner nozzle as claimed in claim 12 each of wherein said blocking means are leaf spring elements that yield in the direction of movement.

14. A vacuum cleaner nozzle as claimed in claim 13 wherein each leaf spring element has one end fixed to said one slide and the other free end engaging an associated abutment structure.