MULTI-PURPOSE VACUUM CLEANER NOZZLE

• US 3,659,312 A
• Filed: 11/25/1970
• Issued: 05/02/1972
• Est. Priority Date: 11/28/1969
• Status: Expired due to Term

• Current Assignee: Bo Gunnar Mattsson
• Original Assignee: Bo Gunnar Mattsson
• Inventors: Mattsson, Bo Gunnar
• Primary Examiner(s): Scheel, Walter A.
• Assistant Examiner(s): Moore, C. K.
• Application Number:
  US05/092,695
• Time in Patent Office: 524 Days
• Field of Search: 15/319,355,368,371,382,419
• 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 multi-purpose vacuum cleaner nozzle has a suction inlet which is movable over a porous object like a rug to remove dirt therefrom. A brush is mounted on the nozzle at the vicinity of the suction inlet for movement between upper and lower positions. The brush in its lower position is below the suction inlet and functions to remove dirt from a non-porous object like a floor. The suction inlet functions to remove dirt from a porous object when the brush is in its upper position above the suction inlet. The brush is moved to its upper and lower positions by a variable pneumatic force which acts upward or downward depending upon the rate at which air at a partial vacuum flows per unit interval of time in a path of flow from the suction inlet to an air outlet socket. The variable pneumatic force is produced by mechanism which is characterized by the absence of any springs or spring biasing means.

Claims

1. A multi-purpose vacuum cleaner nozzle comprising a. a hollow body having vertically disposed wall means which forms a downward extending passageway and terminates in an opening defining a suction inlet, said body also having an air outlet socket adapted to be connected to a source of supply of air at a partial vacuum and means providing a path of flow for air between the suction inlet and outlet socket, b. brush means disposed exteriorly of said wall means at the viciniTy of said suction inlet, said brush means having vertically disposed bristles depending downward therefrom, c. structure for mounting said brush means to reciprocate on said body between upper and lower positions, d. means for producing a variable pneumatic force which is directed upward or downward depending upon the rate at which air at a partial vacuum flows in said path of flow per unit interval of time, e. said variable force producing means being operatively connected to said brush means mounting structure so the brush means assumes a multiplicity of positions including its upper and lower positions depending upon the rate at which air at a partial vacuum flows in said path of flow per unit interval of time, and f. the tips of said bristles being at a level above that of said suction inlet when said brush means is in its upper position on said hollow body and at a level below that of said suction inlet when said brush means is in its lower position on said hollow body.

2. A vacuum cleaner nozzle as set forth in claim 1 in which said variable pneumatic force producing means produces a force which is directed upward when the rate at which air flows in said path of flow per unit interval of time is at or less than a predetermined value and produces a force which is directed downward when the rate at which air flows in said path of flow per unit interval of time exceeds the predetermined value.

3. A vacuum cleaner nozzle as set forth in claim 2 in which said variable pneumatic force producing means comprises a movable member arranged to be influenced on one side by air at a partial vacuum at a first region in said path of flow and on the other side by air at a different partial vacuum at a second region of said path of flow removed lengthwise thereof from said first region.

4. A vacuum cleaner nozzle as set forth in claim 3 in which said brush means mounting structure includes a second movable member, and means interconnecting said first and second movable members for transmitting force from said first to said second movable member.

5. A vacuum cleaner nozzle as set forth in claim 4 which comprises means including said body providing first and second spaces above and below said first movable member and a third space above said second movable member, said first space being on said one side of said first movable member and said second space being on said other side thereof, and said third space on the upper side of said second movable member being arranged to be influenced by air at the second partial vacuum at the second region in said path of flow.

6. A vacuum cleaner nozzle as set forth in claim 5 in which the partial vacuum of air at the first region in said path of flow is greater than the partial vacuum of air at the second region in said path of flow.