Patent US4720886A successfully refreshed from Google Patents.
US4720886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floor polishing machine
Assignee: Minuteman International Inc
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Filing: 1986-10-17
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Granted: 1988-01-26
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Expires: 2006-10-17
Abstract
Abstract A high speed floor burnisher has a pad assembly rotating at high speed in a vacuum shroud which is evacuated by forced air without a separate vacuum motor. The evacuated air and entrained dust and debris are routed to a filter assembly with a replaceable filter and a removeable receptacle provided with a trap for larger particles so that they do not plug the filter, and thereby prolong its useful life.
Inventors
- 👤 Rick McLeod
- 👤 Gary E. Palmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:46
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4013; A47L11/02; A47L11/20; A47L11/204; A47L11/206; A47L11/2065; A47L11/4027; A47L11/4036; A47L11/4038; A47L11/4063; A47L11/4069; A47L11/4077
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
147 words
In a high speed floor burnishing machine, the combination comprising a pad driver assembly including a pad adapted to contact the floor; a motor for rotating said pad driver assembly at high angular velocity; means for generating a continuous air flow outwardly of said rotating driver assembly for entraining debris generated by said rotating driver assembly; shroud means enclosing said driver assembly; collection means including a filter in fluid communication with said shroud means for receiving said air flow and entrained debris and defining a generally upright wall having at least a portion being generally cylindrical for routing said air and entrained debris in a generally circular pattern, and further including an upwardly inclined surface for further routing said air toward said filter for filtering out dust and light material from said air, and means for trapping heavier material adjacent the termination of said upwardly inclined surface.
Claim 2
Dependent Claim
147 words
In a high speed floor burnishing machine, the combination comprising a pad driver assembly including a pad adapted to contact the floor; a motor for rotating said pad driver assembly at high angular velocity; means for generating a continuous air flow outwardly of said rotating driver assembly for entraining debris generated by said rotating driver assembly; shroud means enclosing said driver assembly; collection means including a filter in fluid communication with said shroud means for receiving said air flow and entrained debris and defining a generally upright wall having at least a portion being generally cylindrical for routing said air and entrained debris in a generally circular pattern, and further including an upwardly inclined surface for further routing said air toward said filter for filtering out dust and light material from said air, and means for trapping heavier material adjacent the termination of said upwardly inclined surface.
Claim 3
Dependent Claim
50 words
The apparatus of claim 1 wherein said collection means further comprises a housing mounted to said burnishing machine, said receptacle being removably received in said housing and defining a peripheral horizontal surface for partially supporting said filter, whereby said filter may be removed from said receptacle for cleaning or replacement.
Claim 4
Dependent Claim
56 words
The apparatus of claim 1 wherein said trapping means is partially defined by a generally vertical first wall adjacent the uppermost portion of said upwardly inclined surface; and a separate vertical wall extending generally radially of said cylindrical wall portion and spaced from said first vertical wall in the direction of movement of said air therein.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-25 | 1991-07-27 | 1992-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-25 | 1995-07-27 | 1996-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-25 | 1999-07-27 | 2000-01-26 | $7700.00 | Window Closed / Lapsed |