Patent US3602613A successfully refreshed from Google Patents.
US3602613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure pump
Assignee: Flowserve Corp
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Filing: 1969-09-25
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Granted: 1971-08-31
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Expires: 1989-09-25
Abstract
Abstract A high-pressure pump is provided operating in a range from 50,000 p.s.i. to 100,000 p.s.i. but which is useful down to 3,000 p.s.i. in which packings at moving parts are eliminated and seal bushings are used, one toward the process fluid side and the other toward the atmosphere with a lubricating type fluid compatible with the fluid being pumped introduced between the bushings and tending to flow in both directions along the plunger. The pressure of the source of fluid is adjusted to control the clearance at the bushings. Static seals are provided at the outboard ends of each of the bushings to prevent the flow of the fluid except at the clearance locations. The leakage into the system and to the atmosphere is very small.
Inventors
- 👤 Rush B Gunther
- 👤 Robert C Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:23
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/16; F04B53/162; F04B53/164
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
243 words
A pump comprising a cylinder having a continuous longitudinal bore with a working end and a process fluid pumping end, fluid inlet and delivery valves for said pumping end of said cylinder, a plunger reciprocable in said cylinder, axially disposed seal bushings in said cylinder bore and intermediate said cylinder ends and each having interior bores within which said plunger is movable, a clearance between said plunger and said interior bores of said bushing providing orifices for fluid lubricant delivery towards said ends of said interior bores, means for supplying fluid lubricant under pressure to said orifices, a seal supporting member at the working end of said cylinder and through which said plunger is reciprocable, said seal support member having a transverse face with which one end of one of said seal bushings is in engagement, a static seal at said end of said seal bushing contiguous to said seal supporting member between the exterior of said seal bushing and said cylinder bore, said process fluid pumping end of said bore being closed by an end cover member, a hollow cylindrical filler member in said cylinder bore between and in engagement 17 cover with said cover member and the other of said seal bushings and in the interior of which said plunger is reciprocable, and a static seal at the end of said other seal bushing contiguous to said filler member between the exterior of said other seal bushing and said cylinder bore.
Claim 2
Dependent Claim
243 words
A pump comprising a cylinder having a continuous longitudinal bore with a working end and a process fluid pumping end, fluid inlet and delivery valves for said pumping end of said cylinder, a plunger reciprocable in said cylinder, axially disposed seal bushings in said cylinder bore and intermediate said cylinder ends and each having interior bores within which said plunger is movable, a clearance between said plunger and said interior bores of said bushing providing orifices for fluid lubricant delivery towards said ends of said interior bores, means for supplying fluid lubricant under pressure to said orifices, a seal supporting member at the working end of said cylinder and through which said plunger is reciprocable, said seal support member having a transverse face with which one end of one of said seal bushings is in engagement, a static seal at said end of said seal bushing contiguous to said seal supporting member between the exterior of said seal bushing and said cylinder bore, said process fluid pumping end of said bore being closed by an end cover member, a hollow cylindrical filler member in said cylinder bore between and in engagement 17 cover with said cover member and the other of said seal bushings and in the interior of which said plunger is reciprocable, and a static seal at the end of said other seal bushing contiguous to said filler member between the exterior of said other seal bushing and said cylinder bore.
Claim 3
Dependent Claim
24 words
A pump as defined in claim 1 in which said seal supporting member is a nut and said nut is engaged with said cylinder.
Claim 4
Dependent Claim
20 words
A pump as defined in claim 1 in which said end cover member has a portion extending into said bore.
Claim 5
Dependent Claim
25 words
A pump as defined in claim 3 in which a static seal is provided between said portion of said end cover member and said bore.
Claim 6
Dependent Claim
32 words
A pump as defined in claim 1 in which said means supplying fluid under pressure includes a member delivering fluid at a pressure higher than the delivered pressure of the process fluid.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |