US3881528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hose nozzle with seal sensing system
Assignee: Individual
•
Filing: 1973-10-23
•
Granted: 1975-05-06
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Expires: 1993-10-23
Abstract
Abstract A hose nozzle particularly suitable for use in self-service gasoline pumps has a pressure seal mounted on the flange of the spout. The seal mates with a matching surface on the filling neck of the tank to be filled. A source of vacuum is connected to a chamber in the seal. When this chamber is blocked by reason of the nozzle being properly seated in the filler cap, a pressure sensitive relay device is actuated to allow gasoline to flow through the nozzle. A source of vacuum pressure is connected to a sensor tube which operates the pressure sensitive relay device when the tank is full. This same tube exhausts gasoline vapors into a remote nonhazardous area.
Inventors
- 👤 Elbert K Mackenzie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:53
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/42; B67D7/54; Y; Y10; Y10T; Y10T137/00; Y10T137/2931
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
194 words
A liquid transfer hose nozzle comprising: a flanged outlet spout, a pressure seal mounted on the flange of said spout, said seal being constructed to mate with a matching surface on a filling neck of a vessel to which liquid is to be transferred, a sensing chamber within said seal, an opening in said seal communicating said sensing chamber with said matching surface on said filler neck so that said sensing chamber is enclosed pressure tight when said seal is mated with said matching surface over said opening so as to seal said spout to said filling neck, a main valve connected between said outlet spout and a source of said liquid, a pressure sensitive pilot relay having a pilot chamber for operating said main valve, and a source of air pressure, said pilot chamber being connected between said sensing chamber and said source of air pressure so that a change in pressure in said sensing chamber caused by sealing said spout to said filling neck will actuate said pilot relay to open said main valve which will remain open only while an unbroken seal is maintained between said spout and said filling neck.
Claim 2
Dependent Claim
194 words
A liquid transfer hose nozzle comprising: a flanged outlet spout, a pressure seal mounted on the flange of said spout, said seal being constructed to mate with a matching surface on a filling neck of a vessel to which liquid is to be transferred, a sensing chamber within said seal, an opening in said seal communicating said sensing chamber with said matching surface on said filler neck so that said sensing chamber is enclosed pressure tight when said seal is mated with said matching surface over said opening so as to seal said spout to said filling neck, a main valve connected between said outlet spout and a source of said liquid, a pressure sensitive pilot relay having a pilot chamber for operating said main valve, and a source of air pressure, said pilot chamber being connected between said sensing chamber and said source of air pressure so that a change in pressure in said sensing chamber caused by sealing said spout to said filling neck will actuate said pilot relay to open said main valve which will remain open only while an unbroken seal is maintained between said spout and said filling neck.
Claim 3
Dependent Claim
18 words
The liquid transfer hose nozzle of claim 1 in which said source of air pressure provides subatmospheric pressure.
Claim 4
Dependent Claim
35 words
The liquid transfer hose nozzle of claim 2 further including an internal passage communicating with said outlet spout and extending through said nozzle to a remote, non-hazardous location for venting of the vessel while filling.
Claim 5
Dependent Claim
72 words
The liquid transfer hose nozzle of claim 1 further including a protective shield enclosing said pressure seal and having a shield opening shaped to fit said filling neck so as to guide said pressure seal into an aligned position relative to said matching surface to effect a seal, said shield opening having a configuration in combination with the shape of said outlEt spout, which prevents sealed mating with nonconforming filling neck shapes.
Claim 6
Dependent Claim
27 words
The liquid transfer hose nozzle of claim 4 in which said matching surface is the filler cap sealing surface of a standard automobile gasoline tank filler neck.
Claim 7
Dependent Claim
43 words
The liquid transfer hose nozzle of claim 1 wherein said sensing chamber is an annular opening in said pressure seal and wherein said matching surface is an annular filling neck, said annular filling neck aligning with said annular opening to close said chamber.
Claim 8
Dependent Claim
140 words
A gasoline hose nozzle for filling gasoline tanks having a filling neck comprising: a flanged outlet spout, a pressure seal mounted on the flange of said spout, said seal being constructed to mate with a matching surface on a filling neck, a sensing chamber in said seal having an opening which mates with said filling neck to enclose said sensing chamber when said seal is mated with said filling neck, a valve connected between said outlet spout and a source of said gasoline, and a pneumatic sensing device connected to said sensing chamber, said sensing device being actuated when said seal is mated with said filling neck, said sensing device being connected to open said valve when said sensing device is actuated so that the gasoline flows through said valve only when said seal is mated with said filling neck.
Claim 9
Dependent Claim
140 words
A gasoline hose nozzle for filling gasoline tanks having a filling neck comprising: a flanged outlet spout, a pressure seal mounted on the flange of said spout, said seal being constructed to mate with a matching surface on a filling neck, a sensing chamber in said seal having an opening which mates with said filling neck to enclose said sensing chamber when said seal is mated with said filling neck, a valve connected between said outlet spout and a source of said gasoline, and a pneumatic sensing device connected to said sensing chamber, said sensing device being actuated when said seal is mated with said filling neck, said sensing device being connected to open said valve when said sensing device is actuated so that the gasoline flows through said valve only when said seal is mated with said filling neck.
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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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |