US4306728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sliding surface packing
Assignee: Woma Apparatebau Wolfgang Maasberg and Co GmbH
•
Filing: 1980-04-03
•
Granted: 1981-12-22
•
Expires: 2000-04-03
Abstract
Abstract A sliding surface packing for use in pumps and particularly high-pressure pumps between spaced apart pair of prop rings and a pump plunger and a pump cylinder wall comprises a plurality of packing rings arranged between the prop rings. At least one of the packing rings comprises a rigid high-pressure ring and at least one packing ring comprises a flexible leakage ring and at least one packing ring comprises a high-pressure ring. A plurality of self-lubricating packing rings form guide rings embedding the leakage ring between adjacent ones of said self-lubricating guides forming a pack of laminations.
Inventors
- 👤 Adalbert Huperz
- 👤 Wolfgang Maasberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:17
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/18; F16J15/184; F16J15/185; F16J15/186; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/936; Y10S277/937; Y10S277/944; Y10S277/945; Y10S277/946
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
93 words
A sliding surface packing for use in pumps, particularly high-pressure pumps between a spaced pair of prop rings and a pump plunger and a pump cylinder wall, comprising a plurality of packing rings arranged between prop rings, at least one of said packing rings comprising a high-pressure ring and at least one of said packing rings comprising a flexible leakage ring, said packing ring also including a plurality of self lubricating packing rings forming guide rings embedding said leakage ring between adjacent ones of said guide rings forming a pack of laminations therewith.
Claim 2
Dependent Claim
93 words
A sliding surface packing for use in pumps, particularly high-pressure pumps between a spaced pair of prop rings and a pump plunger and a pump cylinder wall, comprising a plurality of packing rings arranged between prop rings, at least one of said packing rings comprising a high-pressure ring and at least one of said packing rings comprising a flexible leakage ring, said packing ring also including a plurality of self lubricating packing rings forming guide rings embedding said leakage ring between adjacent ones of said guide rings forming a pack of laminations therewith.
Claim 3
Dependent Claim
19 words
A sliding surface packing according to claim 1 wherein said high-pressure ring comprises a PTFE-impregnated mesh of PTFE fibers.
Claim 4
Dependent Claim
23 words
A sliding surface packing according to claim 1 wherein said leakage ring comprises a PTFE-impregnated mesh of bast fibers, for example, ramie fibers.
Claim 5
Dependent Claim
14 words
A sliding surface packing according to claim 1, wherein said guide rings comprise carbon.
Claim 6
Dependent Claim
52 words
A sliding surface packing according to claim 1 wherein said pack of laminations comprise in the pressure direction a brass ring forming a prop ring, a guide ring, a leakage ring, a second guide ring, a high-pressure ring, a third guide ring, and a corrosion resistant steel ring forming a prop ring.
Claim 7
Dependent Claim
82 words
A sliding surface packing for use in pumps comprising a pump cylinder, a plunger slidable in said cylinder, first and second axially spaced apart prop rings disposed in said cylinder between said plunger and said interior said cylinder, a plurality of packing rings disposed between said prop rings at least one comprising a rigid high-pressure ring, at least one other comprising a flexible leakage ring, and guide ring means embedding said packing rings forming a laminate structure thereof between said prop rings.
Claim 8
Dependent Claim
82 words
A sliding surface packing for use in pumps comprising a pump cylinder, a plunger slidable in said cylinder, first and second axially spaced apart prop rings disposed in said cylinder between said plunger and said interior said cylinder, a plurality of packing rings disposed between said prop rings at least one comprising a rigid high-pressure ring, at least one other comprising a flexible leakage ring, and guide ring means embedding said packing rings forming a laminate structure thereof between said prop rings.
References Cited (Backward Citations)
CA763306A
Cited
US2292543A
Cited
US3019739A
Cited
US3231460A
Cited
US3168869A
Cited
US3559950A
Cited
US3655207A
Cited
US3698726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-21 | 1985-06-22 | 1985-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-21 | 1989-06-22 | 1989-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-21 | 1993-06-22 | 1993-12-22 | $7700.00 | Window Closed / Lapsed |