Patent US3762438A successfully refreshed from Google Patents.
US3762438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure balanced connection
Assignee: B AND L MACHINE CO Inc
•
Filing: 1971-02-18
•
Granted: 1973-10-02
•
Expires: 1991-02-18
Abstract
Abstract Tubular members are connected by telescopically inserting cylindrical pin end of one member into first opening in cylindrical socket end of other member, with a first O-ring seal around pin between pin and socket. Socket has a second opening to medium exterior to members. A second seal between the members encompasses the second opening. The flow path through the connection includes a first flow passage through the first seal and a second flow passage between the seals. The areas encompassed by the seals projected onto a plane perpendicular to the telescopic axis are equal, whereby forces on the connection due to internal pressure are balanced with respect to separation of the connection. The axes of the tubular members are inclined relative to the pin and socket axis so that the tubular members are coaxial or angularly disposed as desired. The balance of pressure enables simple means to be used for holding the members together mechanically, and for the same reason the connection can be made of aluminum or plastics or other low strength materials. A full opening flapper check valve is incorporated in one of the tubular members.
Inventors
- 👤 M Litchfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:15
CPC Classifications
F; F16; F16L; F16L29/00; F16L25/00; F16L25/0018; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7854; Y10T137/7856; Y10T137/7898; Y10T137/9029
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
353 words
A connection comprising first and second tubular members, a first end of each said member being adapted for connection to another element of a fluid system, a second end of one of said tubular members being provided with and opening into a generally cylindrical socket, said socket having a first opening and a second opening to the space outside said one of said tubular members, a second end of the other of said tubular members being provided with and opening into a generally cylindrical pin disposed in said socket, said pin having an end adapted to be inserted through said first opening and including wall means closing said second opening, first seal means between said pin and socket around said first opening, second seal means between said pin and socket around said second opening, the areas encompassed by said seal means projected perpendicularly onto a plane perpendicular to the axis of said pin and socket being equal and the axial force on said socket due to fluid pressure within said socket between seals acting on said socket through said seals being zero, said end of said pin having an opening communicating and registering with the interior of said socket where said second end of said one of said tubular members opens thereinto, thereby providing a flow passage between said pin and socket, said flow passage extending between said first and second seal means, and means for preventing relative rotation of said pin and socket, the interior angle between said tubular members lying in the range from obtuse to a straight angle, said pin having a cross-sectional area perpendicular to its axis equal to the cross-sectional area of said other of said tubular members, and said flow passage between said pin and socket having a cross sectional area perpendicular to the axis of said one of said tubular members equal to the cross-sectional area of said one of said tubular members, whereby a full opening is provided for fluid flow through said connection from one of said first ends of said tubular members to the other of said first ends of said tubular members.
Claim 2
Dependent Claim
353 words
A connection comprising first and second tubular members, a first end of each said member being adapted for connection to another element of a fluid system, a second end of one of said tubular members being provided with and opening into a generally cylindrical socket, said socket having a first opening and a second opening to the space outside said one of said tubular members, a second end of the other of said tubular members being provided with and opening into a generally cylindrical pin disposed in said socket, said pin having an end adapted to be inserted through said first opening and including wall means closing said second opening, first seal means between said pin and socket around said first opening, second seal means between said pin and socket around said second opening, the areas encompassed by said seal means projected perpendicularly onto a plane perpendicular to the axis of said pin and socket being equal and the axial force on said socket due to fluid pressure within said socket between seals acting on said socket through said seals being zero, said end of said pin having an opening communicating and registering with the interior of said socket where said second end of said one of said tubular members opens thereinto, thereby providing a flow passage between said pin and socket, said flow passage extending between said first and second seal means, and means for preventing relative rotation of said pin and socket, the interior angle between said tubular members lying in the range from obtuse to a straight angle, said pin having a cross-sectional area perpendicular to its axis equal to the cross-sectional area of said other of said tubular members, and said flow passage between said pin and socket having a cross sectional area perpendicular to the axis of said one of said tubular members equal to the cross-sectional area of said one of said tubular members, whereby a full opening is provided for fluid flow through said connection from one of said first ends of said tubular members to the other of said first ends of said tubular members.
Claim 3
Dependent Claim
17 words
Combination according to claim 1, the angle between said tubular members being less than a straight angle.
Claim 4
Dependent Claim
12 words
Combination of claim 2 wherein said wall means is a curved plate.
Claim 5
Dependent Claim
19 words
Combination of claim 2, wherein the axis of the pin is coaxial with the tubular member joining said pin.
Claim 6
Dependent Claim
30 words
Combination of claim 2, wherein a curved flow directing plate is coaxial with the tubular member joining said socket, said plate lying at the junction of the pin and socket.
Claim 7
Dependent Claim
28 words
Combination of claim 5 wherein the end of said pin projects beyond said plate away from said other tubular member and is closed by a flat cylindrical plate.
Claim 8
Dependent Claim
46 words
Combination according to claim 1, said one of said tubular members that is provided with said socket also being provided with a flapper check valve opening away from said socket and spring biased to closed position, the other of said tubular members being provided with handles.
Claim 9
Dependent Claim
17 words
Combination of claim 1 further including means to hold said pin and socket against relative axial movement.
References Cited (Backward Citations)
US1774151A
Cited
US2882923A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |