US3975119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm pump having auxiliary chamber
Assignee: Individual
•
Filing: 1975-09-17
•
Granted: 1976-08-17
•
Expires: 1995-09-17
Abstract
Abstract An improved diaphragm pump including motor driven reciprocating means secured at its outboard end to a flexible diaphragm spanning a pump cavity defined by a pump head including an integrally formed auxiliary chamber provided with valve means adapted to depressurize the pump cavity and the downstream side of the pumping system and to drain the downstream side of the system preparatory to dismantling the pump.
Inventors
- 👤 Jr. Farris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:04
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/04; F04B43/00; F04B43/02; F04B53/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
182 words
In a diaphragm pump including a pump cavity, a distenable diaphragm spanning said cavity, means for distending said diaphragm in forward and backward strokes, inlet and outlet check valves controlling the flow of a liquid through said pump in response to reciprocable distension of said diaphragm, the improvement comprising an outlet chamber located immediately adjacent said outlet check valve, an auxiliary chamber in fluid communication with said outlet chamber and having a wall means and defining a void volume, flange cap means threadably engaging said wall means, conduit means mounted concentrically in said cap means and defining a flow path for the flow of liquid from said auxiliary chamber and, valve means disposed within said auxiliary chamber, said valve means comprising a resilient annular valve seat means and a valve member disposed between the inboard end of said conduit means and said valve seat means whereby the position of said valve member with respect to said valve seat means is selectable by selection of the threaded position of said flange cap means with respect to said wall means of said auxiliary chamber.
Claim 2
Dependent Claim
182 words
In a diaphragm pump including a pump cavity, a distenable diaphragm spanning said cavity, means for distending said diaphragm in forward and backward strokes, inlet and outlet check valves controlling the flow of a liquid through said pump in response to reciprocable distension of said diaphragm, the improvement comprising an outlet chamber located immediately adjacent said outlet check valve, an auxiliary chamber in fluid communication with said outlet chamber and having a wall means and defining a void volume, flange cap means threadably engaging said wall means, conduit means mounted concentrically in said cap means and defining a flow path for the flow of liquid from said auxiliary chamber and, valve means disposed within said auxiliary chamber, said valve means comprising a resilient annular valve seat means and a valve member disposed between the inboard end of said conduit means and said valve seat means whereby the position of said valve member with respect to said valve seat means is selectable by selection of the threaded position of said flange cap means with respect to said wall means of said auxiliary chamber.
Claim 3
Dependent Claim
23 words
The improvement of claim 1 and including an inlet chamber and removable inlet and outlet fittings disposed in said inlet and outlet chambers.
Claim 4
Dependent Claim
23 words
The improvement of claim 1 and including continuous web means securing said conduit means in substantially concentric relationship to said flange cap means.
Claim 5
Dependent Claim
23 words
The improvement of claim 1 wherein said conduit means includes nozzle means on the outboard end thereof for receiving a drainage conduit means.
Claim 6
Dependent Claim
24 words
The improvement of claim 1 wherein said passage leading from said outlet chamber extends in a direction substantially perpendicular from said outlet chamber means.
Claim 7
Dependent Claim
24 words
The improvement of claim 1 wherein said inboard end of said conduit means is provided with groove means for the flow of liquid therealong.
Claim 8
Dependent Claim
23 words
The improvement of claim 6 wherein said inboard end of said conduit means defines a concavity within which said valve member partially resides.
References Cited (Backward Citations)
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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) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |