Patent US3857414A successfully refreshed from Google Patents.
US3857414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal threaded fitting connector
Assignee: Tuthill Pump Co
•
Filing: 1973-02-26
•
Granted: 1974-12-31
•
Expires: 1993-02-26
Abstract
Abstract An easily manipulatable plug or connector for closing the open end of an internally threaded fitting, wherein the connector utilizes a pair of outwardly expansible gripper members for attachment to the internal threads of a fitting to be tested and the connector is easily positioned in the secured and sealing position by a simple movement and is easily and quickly removed thereafter.
Inventors
- 👤 W Richardson
- 👤 R Zurawski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:42
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/10; F16L55/12; F16L55/128; F16L55/136
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
169 words
A quickly attachable and detachable test plug for fluid conduits including a housing having a plunger slidably mounted therein, seal means disposed between said housing and said plunger, an actuating stem carried by said housing and positioned coaxially with said housing and plunger, said stem extending through and beyond said plunger, an actuating sleeve carried by said plunger and positioned coaxially with said stem and adapted for relative axial movement with respect to said stem, a plurality of tube gripping jaws carried by said sleeve on an outer end of said sleeve, a seal on the outer end of said plunger and positioned inwardly of said jaws, said jaws being confined axially of said sleeve and ball means associated with said jaws, said stem and said sleeve, operative, upon relative axial movement between said stem and said sleeve in one direction to cause radial outward movement of said jaws with respect to the axis of said stem to thereby provide an internal gripping connection with a fitting being tested.
Claim 2
Dependent Claim
169 words
A quickly attachable and detachable test plug for fluid conduits including a housing having a plunger slidably mounted therein, seal means disposed between said housing and said plunger, an actuating stem carried by said housing and positioned coaxially with said housing and plunger, said stem extending through and beyond said plunger, an actuating sleeve carried by said plunger and positioned coaxially with said stem and adapted for relative axial movement with respect to said stem, a plurality of tube gripping jaws carried by said sleeve on an outer end of said sleeve, a seal on the outer end of said plunger and positioned inwardly of said jaws, said jaws being confined axially of said sleeve and ball means associated with said jaws, said stem and said sleeve, operative, upon relative axial movement between said stem and said sleeve in one direction to cause radial outward movement of said jaws with respect to the axis of said stem to thereby provide an internal gripping connection with a fitting being tested.
Claim 3
Dependent Claim
26 words
The structure of claim 1 characterized by and including resilient means coacting between said plunger and housing for biasing said plunger outwardly relative to said housing.
Claim 4
Dependent Claim
29 words
The structure of claim 1 wherein said sleeve is mounted for limited movement axially within said plunger and resilient means bias said sleeve axially outwardly relative to said plunger.
Claim 5
Dependent Claim
32 words
The structure of claim 1 wherein said stem is hollow and includes an aperture for communicating pressure within said stem to the interior of said housing between said housing and said plunger.
Claim 6
Dependent Claim
25 words
The structure of claim 1 characterized by and including releasable means for locking said plunger in a preset axially withdrawn position relative to said housing.
Claim 7
Dependent Claim
26 words
The structure of claim 1 wherein said sleeve and said stem have interfitting groove and projection means to prevent relative rotation of said sleeve and stem.
Claim 8
Dependent Claim
25 words
The structure of claim 6 wherein said jaws and sleeve have interfitting groove and projection means to prevent relative rotation of said sleeve and jaws.
Claim 9
Dependent Claim
17 words
The structure of claim 1 characterized by and including resilient means for biasing said jaws radially inwardly.
Claim 10
Dependent Claim
61 words
The structure of claim 1 wherein said stem has an outer portion of enlarged external dimensions relative to the respective remaining portion thereof and a beveled portion between the enlarged portion and the remainder thereof, said ball means being confined by said sleeve to move along said enlarged portion and along said beveled portion during radial inward and outward movement thereof.
Claim 11
Dependent Claim
20 words
The structure of cLaim 9 wherein said sleeve has an enlarged bore portion receiving said enlarged portion of said stem.
Claim 12
Dependent Claim
29 words
The structure of claim 1 wherein said jaws carry external thread-like groove and projection means for a threaded engagement with the internal threads of a conduit to be tested.
References Cited (Backward Citations)
US2581536A
Cited
US2855003A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |