US3702624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston pump
Assignee: Pumpenfabrik Urach GmbH
•
Filing: 1969-09-12
•
Granted: 1972-11-14
•
Expires: 1989-09-12
Abstract
Abstract A piston pump in which the cylinder head encloses the valve housing in such a manner that the delivery valve chamber which is located behind the delivery valve, as seen in the direction of flow of the fluid conveyed through the pump, needs to be sealed relative to the outside only by a single high-pressure gasket which is provided between this valve chamber and the intake line.
Inventors
- 👤 Hugo Fries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:43
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/109; F16; F16K; F16K15/00; F16K15/02; F16K15/06; F16K15/063; F16K15/066; F16K17/00; F16K17/02; F16K17/04; F16K17/044; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7838; Y10T137/7842; Y10T137/7845; Y10T137/7859; Y10T137/7861; Y10T137/7862; Y10T137/7865
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
346 words
A piston pump, especially for conveying fluid under high pressure, comprising, in combination, a one-piece cylinder head being formed with a blind bore having a large-diameter bore portion at the open end and a small-diameter bore portion at the closed end thereof and forming a shoulder face between said open and said closed end, said small-diameter bore portion constituting a delivery chamber; a valve housing located in said large-diameter bore portion and having a maximum diameter substantially equal to that of said large-diameter bore portion so as to be insertable and removable through said open end of said bore, said valve housing having at one end an end face facing said shoulder face of said cylinder head; a cylinder housing connected to the other end of said valve housing, said valve housing and said cylinder housing defining a pump chamber; intake passage means extending through said cylinder head and said valve housing and communicating with said pump chamber; intake valve means for controlling flow of fluid from said intake passage means into said pump chamber; further passage means extending through said valve housing and providing communication between said pump chamber and said delivery chamber; delivery valve means for controlling flow of fluid from said pump chamber through said further passage means into said delivery chamber, said intake valve means and said delivery valve means are respectively disposed at opposite ends of said valve housing, respectively facing said pump chamber and said delivery chamber, and are adapted to open in opposite directions to each other; spring means having one end acting upon said intake valve means and tending to maintain the same in closed position; means for supporting the other end of said spring means; an element connecting said supporting means substantially rigidly to said delivery valve means so that said spring means also tend to maintain said delivery valve means in closed position; delivery passage means communicating with said delivery chamber downstream of said delivery valve means; and a high-pressure gasket between said faces to prevent escape of fluid from said delivery chamber between said faces.
Claim 2
Dependent Claim
346 words
A piston pump, especially for conveying fluid under high pressure, comprising, in combination, a one-piece cylinder head being formed with a blind bore having a large-diameter bore portion at the open end and a small-diameter bore portion at the closed end thereof and forming a shoulder face between said open and said closed end, said small-diameter bore portion constituting a delivery chamber; a valve housing located in said large-diameter bore portion and having a maximum diameter substantially equal to that of said large-diameter bore portion so as to be insertable and removable through said open end of said bore, said valve housing having at one end an end face facing said shoulder face of said cylinder head; a cylinder housing connected to the other end of said valve housing, said valve housing and said cylinder housing defining a pump chamber; intake passage means extending through said cylinder head and said valve housing and communicating with said pump chamber; intake valve means for controlling flow of fluid from said intake passage means into said pump chamber; further passage means extending through said valve housing and providing communication between said pump chamber and said delivery chamber; delivery valve means for controlling flow of fluid from said pump chamber through said further passage means into said delivery chamber, said intake valve means and said delivery valve means are respectively disposed at opposite ends of said valve housing, respectively facing said pump chamber and said delivery chamber, and are adapted to open in opposite directions to each other; spring means having one end acting upon said intake valve means and tending to maintain the same in closed position; means for supporting the other end of said spring means; an element connecting said supporting means substantially rigidly to said delivery valve means so that said spring means also tend to maintain said delivery valve means in closed position; delivery passage means communicating with said delivery chamber downstream of said delivery valve means; and a high-pressure gasket between said faces to prevent escape of fluid from said delivery chamber between said faces.
Claim 3
Dependent Claim
35 words
A piston pump as defined in claim 1, and further comprising at least one annular low-pressure gasket surrounding said valve housing in the region of said opeN end of said bore in said cylinder head.
Claim 4
Dependent Claim
50 words
A piston pump as defined in claim 1, wherein said valve housing and said cylinder housing have end surfaces facing each other and including means for connecting said housings to each other and an other high-pressure gasket between said end surfaces and sealing said pump chamber against the outer atmosphere.
Claim 5
Dependent Claim
57 words
A piston pump as defined in claim 1, wherein said delivery valve means is located at one end of said further passage means and said intake valve means is annular and surrounds the other end of said further passage means, said intake passage means through said valve housing being located radially outwardly of said further passage means.
Claim 6
Dependent Claim
160 words
In a piston pump, a combination comprising a body means defining a pump chamber; fluid intake passage means in said body means communicating with said pump chamber for feeding fluid into said chamber; a delivery chamber in said body means; further passage means in said body means providing communication between said pump chamber and said delivery chamber; intake valve means movable between open and closed positions for controlling flow of fluid from said fluid intake passage means to said pump chamber; delivery valve means movable between open and closed position for controlling flow of pressurized fluid from said pump chamber to said delivery chamber; a spring engaging with one end one of said valve means and tending to maintain the latter in said closed position; and means supporting the other end of said spring and connected to the other of said valve means so that said spring tends to hold also the other of said valve means in closed position.
Claim 7
Dependent Claim
160 words
In a piston pump, a combination comprising a body means defining a pump chamber; fluid intake passage means in said body means communicating with said pump chamber for feeding fluid into said chamber; a delivery chamber in said body means; further passage means in said body means providing communication between said pump chamber and said delivery chamber; intake valve means movable between open and closed positions for controlling flow of fluid from said fluid intake passage means to said pump chamber; delivery valve means movable between open and closed position for controlling flow of pressurized fluid from said pump chamber to said delivery chamber; a spring engaging with one end one of said valve means and tending to maintain the latter in said closed position; and means supporting the other end of said spring and connected to the other of said valve means so that said spring tends to hold also the other of said valve means in closed position.
Claim 8
Dependent Claim
77 words
A combination as defined in claim 5, wherein said intake valve means and said delivery valve means are coaxially arranged, said one of said valve means being an annular valve and said supporting and connecting means comprises a valve stem on the other of said valve means projecting with a portion thereof through and beyond said annular valve and an abutment on said portion of said valve stem against which the other end of said spring abuts.
Claim 9
Dependent Claim
27 words
A combination as defined in claim 6, wherein said one valve means constitutes said inlet valve means and said other valve means constitutes said delivery valve means.
Claim 10
Dependent Claim
120 words
A combination as defined in claim 7, said body means comprising a cylinder head formed with a blind bore, a valve housing in said blind bore, a cylinder housing connected to one end of said valve housing which faces away from the closed end of said blind bore and defining with said valve housing said pumps chamber, said further passage means communicating at one end with said pump chamber and extending through said valve housing, said intake passage means surrounding said one end of said further passage means, said one means being located at said one end of said valve housing and said other valve means at the other end thereof, said valve stem extending through said further passage means.
Claim 11
Dependent Claim
42 words
A combination as defined in claim 5, said body means including a valve housing through which said fluid intake passage means and said further passage means extend, and valve seats for said valve means provided on opposite ends of said valve housing.
Claim 12
Dependent Claim
21 words
A combination as defined in claim 9, and including an additional spring pressing said delivery valve means against its valve seat.
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) | 1975-11-14 | 1976-05-15 | 1976-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-14 | 1980-05-15 | 1980-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-14 | 1984-05-15 | 1984-11-14 | $7700.00 | Window Closed / Lapsed |