Patent US4173989A successfully refreshed from Google Patents.
US4173989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prest-O-Fit universal adapter fitting
Assignee: Individual
•
Filing: 1978-06-12
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Granted: 1979-11-13
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Expires: 1998-06-12
Abstract
Abstract A conventional, flexible sewer drain hose from recreational vehicles, is normally connected to the most common public or private sewer systems, by means of one of many different adaptor fittings, or by means of one fitting utilizing movable or mechanical parts. This device is designed primarily for the purpose of making any of these adaptations with one simple fitting, which does not depend on moving or mechanical parts for its seal, and is described in detail in the following description.
Inventors
- 👤 J. David Prest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:54
CPC Classifications
F; F16; F16L; F16L25/00; F16L25/14; F16L43/00; F16L43/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
191 words
A universal one piece adapter fitting for connecting the sewage drain hose of a recreational vehicle to the input pipe of a sewage system, said fitting comprising in combination: (a) a hollow connector having a first arm and a second arm; (b) said first arm including: i. a cylindrical end having a smooth external surface; ii. a first male threaded section circumscribing said first arm, said first male threaded section being longitudinally displaced from said smooth surfaced cylindrical end; and iii. a second male threaded section circumscribing said first arm; said second male threaded section being longitudinally and radially outwardly displaced from said first male threaded section; (c) said second arm including: i. a further cylindrical end having a smooth external surface; ii. a female threaded section circumscribing said second arm, said female section being radially outwardly displaced from said smooth surfaced cylindrical end; and iii. a third male threaded section circumscribing said second arm, said third male section being radially displaced from said female threaded section; whereby, said connector interconnects the drain hose with any of a smooth surfaced, a male threaded or a female threaded sewage system input pipe.
Claim 2
Dependent Claim
191 words
A universal one piece adapter fitting for connecting the sewage drain hose of a recreational vehicle to the input pipe of a sewage system, said fitting comprising in combination: (a) a hollow connector having a first arm and a second arm; (b) said first arm including: i. a cylindrical end having a smooth external surface; ii. a first male threaded section circumscribing said first arm, said first male threaded section being longitudinally displaced from said smooth surfaced cylindrical end; and iii. a second male threaded section circumscribing said first arm; said second male threaded section being longitudinally and radially outwardly displaced from said first male threaded section; (c) said second arm including: i. a further cylindrical end having a smooth external surface; ii. a female threaded section circumscribing said second arm, said female section being radially outwardly displaced from said smooth surfaced cylindrical end; and iii. a third male threaded section circumscribing said second arm, said third male section being radially displaced from said female threaded section; whereby, said connector interconnects the drain hose with any of a smooth surfaced, a male threaded or a female threaded sewage system input pipe.
Claim 3
Dependent Claim
14 words
The fitting as set forth in claim 1 wherein said connector is an elbow.
Claim 4
Dependent Claim
15 words
The fitting as set forth in claim 2 wherein said elbow is a 90° elbow.
Claim 5
Dependent Claim
24 words
The fitting as set forth in claim 1 wherein said female threaded section and said third male section are radially superimposed upon one another.
Claim 6
Dependent Claim
19 words
The fitting as set forth in claim 4 wherein aid third male threaded section circumscribes said female threaded section.
Claim 7
Dependent Claim
79 words
The fitting as set forth in claim 5 wherein: (a) said cylindrical end and said further cylindrical end are three inches in outside diameter; (b) said first male threaded section is a three inch male pipe thread; (c) said second male threaded section is a three and one half inch male pipe thread; (d) said third male threaded section is a four inch male pipe thread; and (e) said female threaded section is a three inch female pipe thread.
Claim 8
Dependent Claim
14 words
The fitting as set forth in claim 6 wherein said connector is an elbow.
Claim 9
Dependent Claim
15 words
The fitting as set forth in claim 7 wherein said elbow is a 90° elbow.
Claim 10
Dependent Claim
21 words
The fitting as set forth in claim 8 wherein said cylindrical end is at least one and one eighth inch long.
Claim 11
Dependent Claim
22 words
The fitting as set forth in claim 9 wherein said further cylindrical end is at least one and one eighth inch long.
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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) | 1982-11-12 | 1983-05-14 | 1983-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-12 | 1987-05-14 | 1987-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-12 | 1991-05-14 | 1991-11-13 | $7700.00 | Window Closed / Lapsed |