GB505916A - Prefill valves for hydraulic presses - Google Patents
Prefill valves for hydraulic pressesInfo
- Publication number
- GB505916A GB505916A GB32099/37A GB3209937A GB505916A GB 505916 A GB505916 A GB 505916A GB 32099/37 A GB32099/37 A GB 32099/37A GB 3209937 A GB3209937 A GB 3209937A GB 505916 A GB505916 A GB 505916A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- port
- valve element
- ram chamber
- vertical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
- B30B15/18—Control arrangements for fluid-driven presses controlling the reciprocating motion of the ram
- B30B15/183—Controlling the filling of the press cylinder during the approach stroke of the ram, e.g. prefill-valves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Actuator (AREA)
- Control Of Presses (AREA)
- Check Valves (AREA)
Abstract
505,916. Hydraulic presses. BLISS CO., E. W. Nov. 22, 1937, No. 32099. Convention date, Nov. 20, 1936. [Class 69 (ii)] In a hydraulic press a prefill valve for opening and closing liquid communication between the ram chamber and a source of supply of liquid at substantially atmospheric pressure, comprises a port through which such liquid may pass into and out of the ram chamber, and a reciprocating valve element having a portion adapted to extend into and close said port and held in such closed position by hydraulic pressure acting in opposition to pressure within the ram chamber tending to move said element to an open position; the adjacent surfaces of the valve element and port which coact to close the latter are so relatively formed that said port is opened gradually during the withdrawal of the valve element from within the port whereby to prevent an instantaneous release of high pressure within the ram chamber. The valve element 15, Fig. 1, has oblique and vertical seating surfaces 15a and 15b respectively coacting with corresponding surfaces 29a, 29b on the valve seat. Grooves 32 of different lengths are provided in the surface 15b, of the valve element, for the purpose stated. The valve is opened by a spring 30 and closed by pressure liquid introduced through a port 14b, and passing, when the valve has closed, through a check valve 21 in the valve into the ram chamber 16a. In a modification, Fig. 2 (not shown), the oblique seating surfaces are. below the vertical ones, grooves being provided as before in the vertical seating surface of the valve element. In a modification, Fig. 5 (not shown), the grooves are provided in the vertical seating surface of the valve seat. In a modification, Fig. 4, the vertical seating surface 34 of the valve element is inclined relative to the corresponding surface 29b of the valve seat; alternatively, as in Fig. 6 (not shown), the vertical seating surface of the valve seat is inclined relatively to the corresponding surface of the valve element.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US505916XA | 1936-11-20 | 1936-11-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB505916A true GB505916A (en) | 1939-05-19 |
Family
ID=21966153
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB32099/37A Expired GB505916A (en) | 1936-11-20 | 1937-11-22 | Prefill valves for hydraulic presses |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB505916A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE895851C (en) * | 1942-05-19 | 1953-11-05 | Schloemann Ag | Filling valve control for hydraulic presses |
US2672157A (en) * | 1950-06-08 | 1954-03-16 | Robertshaw Fulton Controls Co | Check valve structure for mixing valves |
EP1855014A1 (en) | 2006-05-08 | 2007-11-14 | HAWE Hydraulik GmbH & Co. KG | FIlling valve |
-
1937
- 1937-11-22 GB GB32099/37A patent/GB505916A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE895851C (en) * | 1942-05-19 | 1953-11-05 | Schloemann Ag | Filling valve control for hydraulic presses |
US2672157A (en) * | 1950-06-08 | 1954-03-16 | Robertshaw Fulton Controls Co | Check valve structure for mixing valves |
EP1855014A1 (en) | 2006-05-08 | 2007-11-14 | HAWE Hydraulik GmbH & Co. KG | FIlling valve |
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