US3608913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gland for piston-cylinder assembly and the like
Assignee: IND DEV CO ESTABLISHMENTS
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Filing: 1969-11-20
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Granted: 1971-09-28
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Expires: 1989-11-20
Abstract
Abstract A fluid cylinder traversed by a piston rod has a peripheral recess formed between two axially spaced, relatively adjustable annular members. Clamped within this recess is an annular gasket of relatively stiff elastic material having on one face an annular rib abutting against one of these members and bearing through a membranelike central zone of the gasket upon a resilient ring of more readily deformable material lodged in a groove flanked by two annular beads on the opposite gasket face. The rib is flanked by a pair of annular lips separated from it by respective annular incisions and facing in the direction of fluid pressure, one lip bearing upon the piston rod while the other rests against the peripheral wall of the recess; the beads flanking the groove form integral extensions of the two lips to compress the deformable ring between them upon a splaying of the lips.
Inventors
- 👤 Andre D Assignies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:58
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3204; F16J15/3232; F16J15/3236
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
128 words
A packing gland for sealing two relatively movable cylindrical surfaces against axial fluid flow, comprising an annular body of relatively stiff elastic material forming a central membrane with a pair of opposite faces, an annular rib integral with said membrane on one of said faces, an annular lip integral with said membrane separated radially from said rib on said one of said faces, the other of said faces being provided with an annular bead forming an axial extension of said lip beyond said membrane, said rib projecting axially beyond said lip, and a ring of more readily deformable resilient material adjacent said membrane and said bead aligned with said rib and compressible thereby against said bead upon an axial clamping of said body between two parallel annular shoulders.
Claim 2
Dependent Claim
128 words
A packing gland for sealing two relatively movable cylindrical surfaces against axial fluid flow, comprising an annular body of relatively stiff elastic material forming a central membrane with a pair of opposite faces, an annular rib integral with said membrane on one of said faces, an annular lip integral with said membrane separated radially from said rib on said one of said faces, the other of said faces being provided with an annular bead forming an axial extension of said lip beyond said membrane, said rib projecting axially beyond said lip, and a ring of more readily deformable resilient material adjacent said membrane and said bead aligned with said rib and compressible thereby against said bead upon an axial clamping of said body between two parallel annular shoulders.
Claim 3
Dependent Claim
74 words
A gland as defined in claim 1 wherein said body is further provided with a second lip at said one of said faces on the side of said rib remote from the first-mentioned lip, said other of said faces being provided with a second annular bead forming an axial extension of said second lip beyond said membrane, said beads defining between them an annular groove receiving said ring, said lips being substantially axially coextensive.
Claim 4
Dependent Claim
29 words
A gland as defined in claim 2 wherein said lips are of substantially wedge-shaped profile and are separated from said rib by annular incisions of generally triangular cross section.
Claim 5
Dependent Claim
16 words
A gland as defined in claim 2 wherein said ring is removably lodged between said beads.
Claim 6
Dependent Claim
15 words
A gland as defined in claim 1 wherein said ring is bonded onto said body.
Claim 7
Dependent Claim
15 words
A gland as defined in claim 1 wherein said ring is of circular cross section.
Claim 8
Dependent Claim
14 words
A gland as defined in claim 1 wherein said ring consists of cellular material.
Claim 9
Dependent Claim
67 words
A packing for sealing two relatively movable cylindrical surfaces against axial fluid flow, one of said surfaces being formed with an axially extending recess bounded by two relatively adjustable annular shoulders, comprising at least one gland as defined in claim 1 wedged between said members in said recess with said lip contacting the other of said surfaces and extending axially toward a region of higher fluid pressure.
Claim 10
Dependent Claim
25 words
A packing as defined in claim 8, further comprising a second gland as defined in claim 1 wedged in said recess adjacent the first-mentioned gland.
Claim 11
Dependent Claim
23 words
A packing as defined in claim 9, further comprising a rigid annular spacer slidably inserted in said recess and interposed between said glands.
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |