US4481977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust cap for fluid coupling
Assignee: Parker Hannifin Customer Support Inc
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Filing: 1983-07-18
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Granted: 1984-11-13
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Expires: 2003-07-18
Abstract
Abstract A dust cap for a fluid coupling includes a generally cylindrical body which is mounted on the coupling and an end wall at one end of the cylindrical body. The end wall is provided with a slit therein for permitting another coupling to be inserted through the end wall and a stress relief opening at each end of the slit. A flexible and resilient flap covers each of the stress relief openings, and a fluid drain port is provided in the cylindrical body.
Inventors
- 👤 Ojars Maldavs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:06
CPC Classifications
F; F16; F16L; F16L35/00; F16L2201/00; F16L2201/80
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
85 words
A dust cap for a coupling comprising a generally cylindrical body adapted to be mounted on the coupling, an end wall at one end of the cylindrical body, the end wall having a slit therein for permitting another coupling to be inserted through the end-wall and a stress relief opening at each end of the slot, and a flap covering each of the stress relief openings which is flexible and resilient and adapted to sealingly engage a coupling which is inserted through the end wall.
Claim 2
Dependent Claim
85 words
A dust cap for a coupling comprising a generally cylindrical body adapted to be mounted on the coupling, an end wall at one end of the cylindrical body, the end wall having a slit therein for permitting another coupling to be inserted through the end-wall and a stress relief opening at each end of the slot, and a flap covering each of the stress relief openings which is flexible and resilient and adapted to sealingly engage a coupling which is inserted through the end wall.
Claim 3
Dependent Claim
18 words
The dust cap of claim 1 in which the cylindrical body is provided with a drain port therethrough.
Claim 4
Dependent Claim
23 words
The dust cap of claim 1 in which the cylindrical body is provided with a pair of generally diametrically opposed drain ports therethrough.
Claim 5
Dependent Claim
18 words
The dust cap of claim 1 including a reinforcing means surrounding the cylindrical body adjacent the end wall.
Claim 6
Dependent Claim
36 words
The dust cap of claim 1 in which the cylindrical body is provided with an annular groove in the outer wall thereof adjacent the end wall, and a reinforcing metal ring positioned in the annular groove.
Claim 7
Dependent Claim
29 words
The dust cap of claim 1 including a clamping means surrounding the cylindrical body adjacent the end opposite said one end for clamping the cylindrical body to the coupling.
Claim 8
Dependent Claim
44 words
The coupling of claim 1 in which each of said flaps includes a first end which is attached to the end wall radially outwardly of the associated stress relief opening and a second end which extends radially inwardly to cover the stress relief opening.
Claim 9
Dependent Claim
26 words
The dust cap of claim 1 in which the dust cap is molded from elastomeric material and the flaps are molded integrally with the end wall.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-13 | 1988-05-14 | 1988-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-13 | 1992-05-14 | 1992-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-13 | 1996-05-14 | 1996-11-13 | $7700.00 | Window Closed / Lapsed |