US4443899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum cleaning system for a therapeutic tub
Assignee: Laars Inc
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Filing: 1982-12-20
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Granted: 1984-04-24
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Expires: 2002-12-20
Abstract
Abstract A vacuum cleaning system for a therapeutic tub that utilizes an aerating intake for jet nozzles located around the tub. A vacuum hose is connected to the air intake so that its capacity to draw in air is utilized to draw in spa water and expell it at the jet nozzles. A vacuum head, which is connected at the other end of the hose, is moved along the bottom and sides of the tub to draw in the water, as well as leaves and debris, which are trapped at a filter screen.
Inventors
- 👤 Bruce R. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:30
CPC Classifications
E; E04; E04H; E04H4/00; E04H4/14; E04H4/16; E04H4/1618; E04H4/1636; E04H4/1645; A; A61; A61H; A61H33/00; A61H33/60; A61H33/601; A61H33/6021; A61H33/6068; A61H33/6073; A61H2033/0037; A61H33/0087
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
141 words
A vacuum cleaning system for a therapeutic tub; said tub having a water conduit terminating in at least one jet nozzle mounted in a side wall thereof; a restriction in said conduit to produce a high velocity, low pressure zone; an upright air duct connected to said conduit at said low pressure zone; and means forming an air intake opening at the upper end of said air duct; said vacuum cleaning system comprising: a vacuum head to be moved over the inner surface of said therapeutic tub; an outlet port in said vacuum head; means forming a flow passage from the bottom of said head to said outlet port; a hose connected at one end thereof to said vacuum head outlet port; and means on the other end of said hose to seal around said upper end of the air duct.
Claim 2
Dependent Claim
141 words
A vacuum cleaning system for a therapeutic tub; said tub having a water conduit terminating in at least one jet nozzle mounted in a side wall thereof; a restriction in said conduit to produce a high velocity, low pressure zone; an upright air duct connected to said conduit at said low pressure zone; and means forming an air intake opening at the upper end of said air duct; said vacuum cleaning system comprising: a vacuum head to be moved over the inner surface of said therapeutic tub; an outlet port in said vacuum head; means forming a flow passage from the bottom of said head to said outlet port; a hose connected at one end thereof to said vacuum head outlet port; and means on the other end of said hose to seal around said upper end of the air duct.
Claim 3
Dependent Claim
69 words
The vacuum cleaning system defined by claim 1 wherein: there is a generally horizontal ledge around the upper edge of said tub and said upright air duct extend through said ledge with said air intake thereabove; and including: a receptacle on said other end of the hose; means forming an opening in the bottom of said receptacle; and a sealing surface around said opening to engage said horizontal ledge.
Claim 4
Dependent Claim
18 words
The vacuum cleaning system defined by claim 1 including: an elongated handle pivotally connected to said vacuum head.
Claim 5
Dependent Claim
21 words
The vacuum cleaning system defined by claim 1 including: a filter located between said vacuum head and said air intake opening.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |