US4897187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable water filtration apparatus
Assignee: Individual
•
Filing: 1988-12-05
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Granted: 1990-01-30
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Expires: 2008-12-05
Abstract
Abstract A portable water filtration system for use on a boat has a sediment filter unit and a secondary filter unit connected in series and located between end plates on a base including a flat back plate behind the two filter units. The back plate has a horizontally elongated opening above the filter units, and above this opening it provides a handle that can be conveniently grasped by a person. A first hex flange attaches the inlet end of the sediment filter unit to one of the end plates of the base and also supports a pressure regulator on the outside of this end plate. A second hex flange attaches the outlet end of the secondary filter unit to the other end plate of the base and also supports a hose coupling member on the outside of this end plate.
Inventors
- 👤 William J. Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:30
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/28; C02F1/283; C02F9/00; C02F9/20; C02F2201/00; C02F2201/002; C02F2201/006
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
350 words
A portable water filtration apparatus comprising: a mounting base having a back plate and first and second parallel end plates extending perpendicularly forward from said back plate, each of said end plates having an opening therein; a sediment filter unit having a head with a water inlet on one side and a water outlet on the opposite side, and a porous filter cartridge extending down from said head of the sediment filter unit and arranged to filter water between said water inlet and outlet; a secondary filter unit having a head with a water inlet on one side and a water outlet on the opposite side, and a filter cartridge with activated charcoal therein extending down from said head of the secondary filter unit and arranged to filter water between said water inlet and outlet of said head of the secondary filter unit; a pipe nipple connecting said water outlet of said head of the sediment filter unit to said water inlet of said head of the secondary filter unit; said head of the sediment filter unit, said pipe nipple and said head of the secondary filter unit having a combined length substantially equal to the distance between the inside faces of said end plates on the mounting base; a pressure regulator having a water inlet and a water outlet; manually attachable and releasable means at said opening in said first end plate holding said one side of said head of the sediment filter unit against the inside of said first end plate and holding said pressure regulator on the outside of said first end plate with said water outlet of the pressure regulator registering with said water inlet of said head of the sediment filter unit at said opening in said first end plate; and manually attachable and releasable means at said opening in said second end plate holding said opposite side of said head of said secondary filter unit against the inside of said second end plate with said water outlet of said head of the secondary filter unit registering with said opening in said second end plate.
Claim 2
Dependent Claim
350 words
A portable water filtration apparatus comprising: a mounting base having a back plate and first and second parallel end plates extending perpendicularly forward from said back plate, each of said end plates having an opening therein; a sediment filter unit having a head with a water inlet on one side and a water outlet on the opposite side, and a porous filter cartridge extending down from said head of the sediment filter unit and arranged to filter water between said water inlet and outlet; a secondary filter unit having a head with a water inlet on one side and a water outlet on the opposite side, and a filter cartridge with activated charcoal therein extending down from said head of the secondary filter unit and arranged to filter water between said water inlet and outlet of said head of the secondary filter unit; a pipe nipple connecting said water outlet of said head of the sediment filter unit to said water inlet of said head of the secondary filter unit; said head of the sediment filter unit, said pipe nipple and said head of the secondary filter unit having a combined length substantially equal to the distance between the inside faces of said end plates on the mounting base; a pressure regulator having a water inlet and a water outlet; manually attachable and releasable means at said opening in said first end plate holding said one side of said head of the sediment filter unit against the inside of said first end plate and holding said pressure regulator on the outside of said first end plate with said water outlet of the pressure regulator registering with said water inlet of said head of the sediment filter unit at said opening in said first end plate; and manually attachable and releasable means at said opening in said second end plate holding said opposite side of said head of said secondary filter unit against the inside of said second end plate with said water outlet of said head of the secondary filter unit registering with said opening in said second end plate.
Claim 3
Dependent Claim
173 words
An apparatus according to claim 1 wherein: said water inlet of said head of the sediment filter unit is a screw-threaded opening which is open toward said first end plate of the mounting base and registers with said opening in said first end plate; and said manually attachable and releasable means holding said head of the sediment filter unit against said first end plate is a hollow bushing having (a) a polygonal head engaging the outside of said first end plate around said opening in said first end plate and having a screw-threaded opening holding said pressure regulator, and (b) an externally screw-threaded stem joined to said polygonal head and passing through said opening in said first end plate and threadedly received in said screw-threaded opening in said head of the sediment filter unit, said stem having an opening therethrough which is a continuation of said screw-threaded opening in said polygonal head for passing water from the outlet of the pressure regulator to the inlet of said head of the sediment filter unit.
Claim 4
Dependent Claim
197 words
An apparatus according to claim 2 wherein: said water outlet of said head of the secondary filter unit is a screw-threaded opening which is open toward said second end plate of the mounting base and registers with said opening in said second end plate; and said manually attachable and releasable means holding said head of the secondary filter unit against said second end plate is a hollow bushing having (c) a polygonal head engaging the outside of said second end plate around said opening in said second end plate and having a screw-threaded opening, and (d) an externally screw-threaded stem joined to said polygonal head and passing through said opening in said second end plate and threadedly received in said head of the secondary filter unit, said stem having an opening therethrough which is a continuation of said screw-threaded opening in said polygonal head; and further comprising a male hose coupling member releasably attachable to a female hose coupling member outside said second end plate and having an externally screw-threaded stem threadedly received in said screw-threaded opening in said polygonal head of said bushing holding said head of the secondary filter unit against said second end plate.
Claim 5
Dependent Claim
23 words
An apparatus according to claim 3, wherein said back plate has a horizontally elongated opening therein near the top above said end plates.
Claim 6
Dependent Claim
197 words
An apparatus according to claim 1 wherein: said water outlet of said head of the secondary filter unit is a screw-threaded opening which is open toward said second end plate of the mounting base and registers with said opening in said second end plate; and said manually attachable and releasable means holding said head of the secondary filter unit against said second end plate is a hollow bushing having (a) a polygonal head engaging the outside of said second end plate around said opening in said second end plate and having a screw-threaded opening, and (b) an externally screw-threaded stem joined to said polygonal head and passing through said opening in said second end plate and threadedly received in said head of the secondary filter unit, said stem having an opening therethrough which is a continuation of said screw-threaded opening in said polygonal head; and further comprising a male hose coupling member releasably attachable to a female hose coupling member outside said second end plate and having an externally screw-threaded stem threadedly received in said screw-threaded opening in said polygonal head of said bushing holding said head of the secondary filter unit against said second end plate.
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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) | 1993-01-29 | 1993-07-31 | 1994-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-29 | 1997-07-31 | 1998-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-29 | 2001-07-31 | 2002-01-30 | $7700.00 | Window Closed / Lapsed |