US3872899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor recovery fluid loading arm with dripless discharge spout
Assignee: FMC Corp
•
Filing: 1973-06-04
•
Granted: 1975-03-25
•
Expires: 1993-06-04
Abstract
Abstract A vapor recovery fluid loading arm especially for transferring gasoline or other volatile fluids from a reservoir thereof to a tank truck, railway tank car, or other receptacle, and recovering the vapors evolved therefrom. The loading arm has a dripless discharge spout that prevents residual fluid from draining out of the spout after the flow control valve in the arm is closed, thereby preventing spillage and corresponding pollution of the atmosphere. Four different embodiments of dripless discharge spouts are described, each of which has a closure element that shuts off the flow of fluid through it in response to a predetermined condition or signal.
Inventors
- 👤 Houston W Knight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:29
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/42; B67D7/54
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
182 words
In a vapor recovery fluid loading arm including a fluid delivery conduit extending between fluid supply means and fluid dispensing means, and a vapor return conduit extending between said fluid dispensing means and a vapor receiving means, the improvement comprising a fluid outlet-vapor inlet assembly intermediate the fluid dispensing means and the atmosphere, said assembly including a. a generally tubular body having inner and outer ends, said inner end connected to said fluid dispensing means, said body separated into a fluid passageway and a vapor passageway by a generally longitudinal wall having a transverse web portion forming a mounting for a valve operating means, b. a valve seat formed in the outer end of the tubular body, c. a valve closure element for cooperating with the valve seat to form a barrier preventing fluid from passing to the atmosphere from the fluid passageway, d. a valve operating means mounted on the web portion and connected to the valve closure element, and e. valve control means connected to the valve operating means for controlling actuation of said operating Means from a remote location.
Claim 2
Dependent Claim
182 words
In a vapor recovery fluid loading arm including a fluid delivery conduit extending between fluid supply means and fluid dispensing means, and a vapor return conduit extending between said fluid dispensing means and a vapor receiving means, the improvement comprising a fluid outlet-vapor inlet assembly intermediate the fluid dispensing means and the atmosphere, said assembly including a. a generally tubular body having inner and outer ends, said inner end connected to said fluid dispensing means, said body separated into a fluid passageway and a vapor passageway by a generally longitudinal wall having a transverse web portion forming a mounting for a valve operating means, b. a valve seat formed in the outer end of the tubular body, c. a valve closure element for cooperating with the valve seat to form a barrier preventing fluid from passing to the atmosphere from the fluid passageway, d. a valve operating means mounted on the web portion and connected to the valve closure element, and e. valve control means connected to the valve operating means for controlling actuation of said operating Means from a remote location.
Claim 3
Dependent Claim
50 words
A vapor recovery-fluid loading arm according to claim 1 including vapor valve means in the vapor passageway for preventing reverse flow of vapor from the vapor return conduit into said vapor passageway, said vapor valve means operably connected to the valve control means for operation with the valve closure element.
Claim 4
Dependent Claim
43 words
A vapor recovery-fluid loading arm according to claim 1 including float means in the vapor passageway of the tubular body, said float means operably connected to a fluid flow control valve for closing said valve to prevent fluid flow through the fluid conduit.
Claim 5
Dependent Claim
34 words
A vapor recovery-fluid loading arm according to claim 1 wherein the valve operating means comprises a fluid powered piston and cylinder assembly with a piston rod interconnecting the piston and the valve closure element.
Claim 6
Dependent Claim
33 words
A vapor recovery-fluid loading arm according to claim 1 including means for actuating the valve control means in response to a position change of the assembly with respect to a fluid receiving means.
Claim 7
Dependent Claim
52 words
An apparatus according to claim 5 wherein the actuating means for the valve control means comprises a contact valve associated with and movable with respect to the fluid dispensing means, said contact valve disposed for movement in response to placing the fluid outlet-vapor inlet assembly into fluid delivery position in a receptacle.
References Cited (Backward Citations)
US2479454A
Cited
US2726800A
Cited
US2809677A
Cited
US2963205A
Cited
US3605824A
Cited
US3604478A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |