US2685276A - Valve operated pressure control - Google Patents

Valve operated pressure control Download PDF

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Publication number
US2685276A
US2685276A US219494A US21949451A US2685276A US 2685276 A US2685276 A US 2685276A US 219494 A US219494 A US 219494A US 21949451 A US21949451 A US 21949451A US 2685276 A US2685276 A US 2685276A
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Prior art keywords
valve
pressure
pressure control
cylinder
piston
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Expired - Lifetime
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US219494A
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Charles P Dyken
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
    • F15B11/0426—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in" by controlling the number of pumps or parallel valves switched on
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/31523—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and an output member
    • F15B2211/31535—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and an output member having multiple pressure sources and a single output member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40576—Assemblies of multiple valves
    • F15B2211/40592—Assemblies of multiple valves with multiple valves in parallel flow paths
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41509—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and a directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/42—Flow control characterised by the type of actuation
    • F15B2211/426—Flow control characterised by the type of actuation electrically or electronically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/455—Control of flow in the feed line, i.e. meter-in control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7052—Single-acting output members
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87169—Supply and exhaust
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/877—With flow control means for branched passages
    • Y10T137/87708—With common valve operator
    • Y10T137/87748—Pivoted or rotary motion converted to reciprocating valve head motion
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/877—With flow control means for branched passages
    • Y10T137/87909—Containing rotary valve

Definitions

  • My invention relates to improvements in pressure control and more particularly to a control for hydraulic or pneumatic pressure.
  • the object of my invention is to provide a means for positively controlling pressure.
  • Another object of my invention is to provide a means for providing a gradual pressure, a full pressure, or an immediate release of the pressure applied to an actuating means and this is accomplished by manual manipulation or by mechanical control.
  • Figure 1 is a side, fragmentary, cross sectional view of the assembled device.
  • Figure 2 is a cross sectional view of the assembled units with the valve arrangement set for quick feed of the pressure.
  • Figure 3 is a similar view of the assembled units with the valve arrangement set for a gradual feed or" the pressure
  • Figure 4 is a similar view as shown in Figures 2 and 3, with the valve arrangement set for aquick release or exhaust.
  • the character It indicates the inlet to the assembled unit, for supplying pressure either hydraulically or pneumatically by means of a pump or a compressor to a tubular member H which enters a valve 12 at l3.
  • the valve 12 is operated either mechanically or manually by the lever M which rotates an inner member It provided with a port [6 having an inlet [1 and an outlet l8.
  • valve l2 There is an outlet tube 19 leading from the valve l2 and an exhaust tube 2c also leading from the valve [2 to a reservoir (not shown), in the event that the device is used for hydraulic pressure control, or to the outside atmosphere when the device is employed for pneumatic pressure control.
  • a by-pass tube 2! leads from the tubular member II to a control valve 22 which may be of any conventional design and is shown in the illustration as regulated manually by the screw 23, operated by the hand wheel 24, for adjusting the opening between the ground seat and the cone point or" the screw as shown at 25.
  • the control valve 22 has a tubular outlet 26 leading to a two-Way valve 2? which is provided with a revolving member 28 and is actuated by means of a lever 29 attached by a link 30, to the lever is on the main valve 12.
  • the revolving member 23 in the valve 27 is provided with a port 3
  • the entire unit is a self-contained, closed assembly of tubes and valves to supply the liquid or air to a cylinder shown as 33.
  • the manipulation of the handle it on the valve l2 revolves the member l5 in the valve I2 so as to place the port HS in position as shown in Fig. 1, when a quick or rapid travel of the piston 34 within the cylinder 33- is desired.
  • the valve 21 is closed as shown in Fig. 1, the pressure of the air or liquid entering the assembly It will flow directly through the valve l2 into the cylinder 33 causing the piston 3A to move upward.
  • the lever or handle 54 in the valve i 2 When a control of the pressure is desired the lever or handle 54 in the valve i 2 is moved so that it will close the valve 12 as shown in Fig. 2, and open the valve 27, thereby causing the liquid or air entering at H] to flow through the tube 2! to the control valve 22 which is set at a pre-determined point, and through this valve 22 through the tube 26 to the valve 2'! and into the cylinder 33. This will cause the piston 34 to rise upward at a speed determined by the setting of the control valve 22.
  • Fig. 4 I show an arrangement in which the lever M is set to open the port It to the tubular member l9 and the exhaust outlet 20, and inasmuch as the valve 27 is in a closed position, the piston 34 will force the air or liquid out of the cylinder 33 through the tubes 32 and I 9, where it will be exhausted out of the valve l2 at 20.
  • a pressure control comprising a tubular supply member leading to an individual three-way valve having an inlet port, an outlet port, and an exhaust port, a separate manually controlled pressure regulating valve, both of said valves equipped with operating levers, said pressure regulating valve having its inlet connected by tubular means to said supply member, a separate two-way valve having an inlet port and an outlet port, an operating lever connected.
  • tubular means connecting the outlet of said pressure regulating valve to the inlet of said twoway valve, a cylinder, a piston within said cylinder, a tubular member connected to said cylinder and leading to both the outlet ports of said twoway and three-way valves, and a link member attached to the operating lever of said three-way Valve at one end and to the operating lever of the two-way valve at the other end, so as to open said two-way valve when said three-way valve is closed and closing said two-way valve when said three-way valve is open.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Earth Drilling (AREA)

Description

C. P. DYKEN VALVE OPERATED PRESSURE CONTROL Aug. 3, 1954 Filed April 5 1951 INVENTOR. CHARLES P. DYKEN mzw ATTORNEY,
Patented Aug. 3, 1954 UNITED STATES e TNT OFFICE 1 Claim.
My invention relates to improvements in pressure control and more particularly to a control for hydraulic or pneumatic pressure.
The object of my invention is to provide a means for positively controlling pressure.
Another object of my invention is to provide a means for providing a gradual pressure, a full pressure, or an immediate release of the pressure applied to an actuating means and this is accomplished by manual manipulation or by mechanical control.
It is manifest to any one familiar with the art that in the manipulation of various types of machines, apparatuses or actuating mechanisms it is ofttimes desirable to apply full pressure quick, or to apply a gradual pressure, and this is usually accomplished by valve manipulation or action. With the arrangement shown it is possible to obtain a quick feed, a gradual feed, or a rapid release with but a single operating lever.
Other and further objects of my invention will become more apparent as the description proceeds when taken in conjunction with the drawing, in which Figure 1 is a side, fragmentary, cross sectional view of the assembled device.
Figure 2 is a cross sectional view of the assembled units with the valve arrangement set for quick feed of the pressure.
Figure 3 is a similar view of the assembled units with the valve arrangement set for a gradual feed or" the pressure, and
Figure 4 is a similar view as shown in Figures 2 and 3, with the valve arrangement set for aquick release or exhaust.
Similar characters of reference indicate corresponding parts throughout the several views and referring now to the same, the character It indicates the inlet to the assembled unit, for supplying pressure either hydraulically or pneumatically by means of a pump or a compressor to a tubular member H which enters a valve 12 at l3. The valve 12 is operated either mechanically or manually by the lever M which rotates an inner member It provided with a port [6 having an inlet [1 and an outlet l8.
There is an outlet tube 19 leading from the valve l2 and an exhaust tube 2c also leading from the valve [2 to a reservoir (not shown), in the event that the device is used for hydraulic pressure control, or to the outside atmosphere when the device is employed for pneumatic pressure control.
A by-pass tube 2! leads from the tubular member II to a control valve 22 which may be of any conventional design and is shown in the illustration as regulated manually by the screw 23, operated by the hand wheel 24, for adjusting the opening between the ground seat and the cone point or" the screw as shown at 25.
The control valve 22 has a tubular outlet 26 leading to a two-Way valve 2? which is provided with a revolving member 28 and is actuated by means of a lever 29 attached by a link 30, to the lever is on the main valve 12. The revolving member 23 in the valve 27 is provided with a port 3| and a tubular member 32 extends from the valve 21 to a cylinder 33 which encases a piston 34, and this piston is provided with a rod shown as 35 which is employed to actuate the mechanism being operated. The member [9 enters the tubular member 32 at 35.
The entire unit is a self-contained, closed assembly of tubes and valves to supply the liquid or air to a cylinder shown as 33. The manipulation of the handle it on the valve l2 revolves the member l5 in the valve I2 so as to place the port HS in position as shown in Fig. 1, when a quick or rapid travel of the piston 34 within the cylinder 33- is desired. In this manner the valve 21 is closed as shown in Fig. 1, the pressure of the air or liquid entering the assembly It will flow directly through the valve l2 into the cylinder 33 causing the piston 3A to move upward.
When a control of the pressure is desired the lever or handle 54 in the valve i 2 is moved so that it will close the valve 12 as shown in Fig. 2, and open the valve 27, thereby causing the liquid or air entering at H] to flow through the tube 2! to the control valve 22 which is set at a pre-determined point, and through this valve 22 through the tube 26 to the valve 2'! and into the cylinder 33. This will cause the piston 34 to rise upward at a speed determined by the setting of the control valve 22.
In Fig. 4, I show an arrangement in which the lever M is set to open the port It to the tubular member l9 and the exhaust outlet 20, and inasmuch as the valve 27 is in a closed position, the piston 34 will force the air or liquid out of the cylinder 33 through the tubes 32 and I 9, where it will be exhausted out of the valve l2 at 20.
The drawings illustrate the arrangement em ployed when a weight (not shown) is lifted by the piston 34, and when the pressure of the liquid or air in the cylinder 33 is released the piston 34 will force the air or liquid out of the cylinder due to the weight of the piston, which is equivalent to the piston and cylinder arrangement employed for raising the top roller in my rug rolling ma- 3 chine covered by my Patent No. 2,573,188, dated October 13, 1951.
While I have shown a particular arrangement of the component parts constituting my device, I am fully cognizant of the fact that many changes may be made in the direction, size and arrangement of the tubular members without affecting their operativeness, and I reserve the right to make such changes that do not affect the spirit of my invention or the scope of the appenda-nt claim.
Having thus described my invention what I claim and desire to secure by Letters Patent in the United States is:
A pressure control comprising a tubular supply member leading to an individual three-way valve having an inlet port, an outlet port, and an exhaust port, a separate manually controlled pressure regulating valve, both of said valves equipped with operating levers, said pressure regulating valve having its inlet connected by tubular means to said supply member, a separate two-way valve having an inlet port and an outlet port, an operating lever connected. to said two-way valve, tubular means connecting the outlet of said pressure regulating valve to the inlet of said twoway valve, a cylinder, a piston within said cylinder, a tubular member connected to said cylinder and leading to both the outlet ports of said twoway and three-way valves, and a link member attached to the operating lever of said three-way Valve at one end and to the operating lever of the two-way valve at the other end, so as to open said two-way valve when said three-way valve is closed and closing said two-way valve when said three-way valve is open.
References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,441,088 Hofstetter Jan. 2, 1923 1,566,111 Miller Dec. 15, 1925 1,605,133 Woroney Nov. 2, 1926 1,920,596 Schafer Aug. 1, 1933 2,063,414 Tweddell Dec. 8, 1936 2,067,492 Kingsbury Jan. 12, 1937 2,232,038 Stone Feb. 18, 1941 2,311,336 Gora Feb. 16, 1943 2,331,790 Nichols Oct. 12, 1943 2,369,887 Eckman Feb. 20, 1945 2,375,946 Reichelt May 15, 1945 2,416,722 Waldie Mar. 4, 1947 2,418,840 Karweit Apr. 15, 1947 2,483,312 Clay Septv 27, 1949 2,647,980 1953 Moore Aug. 4,
US219494A 1951-04-05 1951-04-05 Valve operated pressure control Expired - Lifetime US2685276A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3511130A (en) * 1967-04-25 1970-05-12 Fishburne Equipment Co Inc Differential reciprocating hydraulic motor
US3877347A (en) * 1973-03-13 1975-04-15 Res Engineering Company Hydraulic control
US3901128A (en) * 1973-08-24 1975-08-26 Ltv Aerospace Corp Fluid powered control system and fail-safe valving system for a fluid powered system
US4622135A (en) * 1984-10-29 1986-11-11 Calvin Williams Grease filtering apparatus
US4715264A (en) * 1985-02-22 1987-12-29 Kurt Stoll Piston and cylinder unit
US4736585A (en) * 1985-03-15 1988-04-12 Mannesmann Rexroth Gmbh Hydrostatic machine
US20130061968A1 (en) * 2010-06-02 2013-03-14 Bernhard Schlichter Switching device for conducting a fluid
US20130068979A1 (en) * 2010-06-25 2013-03-21 Hydac Process Technology Gmbh Switching apparatus for a fluid flow

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1441088A (en) * 1919-03-01 1923-01-02 Illinois Tool Works System of air control
US1566111A (en) * 1923-10-23 1925-12-15 Miller Thomas Spencer Fluid-pressure-operated device and control therefor
US1605133A (en) * 1922-10-23 1926-11-02 Oliver C Moroney Liquid-measuring device and sprayer
US1920596A (en) * 1929-02-19 1933-08-01 Nat Automatic Tool Co Hydraulic actuating and control valve means
US2063414A (en) * 1933-11-17 1936-12-08 Victor R Heftler Hydraulic feed for machine tools
US2067492A (en) * 1934-01-30 1937-01-12 Kingsbury Edward Joslin Feeding apparatus
US2232038A (en) * 1938-10-31 1941-02-18 Themselves And Kenneth M Ryals Electric spot welding machine
US2311336A (en) * 1940-07-27 1943-02-16 Jenkins Bros Hydraulic valve mechanism
US2331790A (en) * 1941-02-25 1943-10-12 Jr Herbert L Nichols Hydraulic control valve
US2369887A (en) * 1943-01-23 1945-02-20 Brown Instr Co Control mechanism
US2375946A (en) * 1942-07-08 1945-05-15 Western Electric Co Control system
US2416722A (en) * 1944-04-17 1947-03-04 Hpm Dev Corp Valve for hydraulic circuit
US2418840A (en) * 1942-11-03 1947-04-15 Ex Cell O Corp Hydraulic drill press
US2483312A (en) * 1944-08-02 1949-09-27 Bendix Aviat Corp Valve
US2647980A (en) * 1950-03-30 1953-08-04 Thomson Electric Welder Compan Platen control mechanism for welding machines

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1441088A (en) * 1919-03-01 1923-01-02 Illinois Tool Works System of air control
US1605133A (en) * 1922-10-23 1926-11-02 Oliver C Moroney Liquid-measuring device and sprayer
US1566111A (en) * 1923-10-23 1925-12-15 Miller Thomas Spencer Fluid-pressure-operated device and control therefor
US1920596A (en) * 1929-02-19 1933-08-01 Nat Automatic Tool Co Hydraulic actuating and control valve means
US2063414A (en) * 1933-11-17 1936-12-08 Victor R Heftler Hydraulic feed for machine tools
US2067492A (en) * 1934-01-30 1937-01-12 Kingsbury Edward Joslin Feeding apparatus
US2232038A (en) * 1938-10-31 1941-02-18 Themselves And Kenneth M Ryals Electric spot welding machine
US2311336A (en) * 1940-07-27 1943-02-16 Jenkins Bros Hydraulic valve mechanism
US2331790A (en) * 1941-02-25 1943-10-12 Jr Herbert L Nichols Hydraulic control valve
US2375946A (en) * 1942-07-08 1945-05-15 Western Electric Co Control system
US2418840A (en) * 1942-11-03 1947-04-15 Ex Cell O Corp Hydraulic drill press
US2369887A (en) * 1943-01-23 1945-02-20 Brown Instr Co Control mechanism
US2416722A (en) * 1944-04-17 1947-03-04 Hpm Dev Corp Valve for hydraulic circuit
US2483312A (en) * 1944-08-02 1949-09-27 Bendix Aviat Corp Valve
US2647980A (en) * 1950-03-30 1953-08-04 Thomson Electric Welder Compan Platen control mechanism for welding machines

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3511130A (en) * 1967-04-25 1970-05-12 Fishburne Equipment Co Inc Differential reciprocating hydraulic motor
US3877347A (en) * 1973-03-13 1975-04-15 Res Engineering Company Hydraulic control
US3901128A (en) * 1973-08-24 1975-08-26 Ltv Aerospace Corp Fluid powered control system and fail-safe valving system for a fluid powered system
US4622135A (en) * 1984-10-29 1986-11-11 Calvin Williams Grease filtering apparatus
US4715264A (en) * 1985-02-22 1987-12-29 Kurt Stoll Piston and cylinder unit
US4736585A (en) * 1985-03-15 1988-04-12 Mannesmann Rexroth Gmbh Hydrostatic machine
US20130061968A1 (en) * 2010-06-02 2013-03-14 Bernhard Schlichter Switching device for conducting a fluid
US20130068979A1 (en) * 2010-06-25 2013-03-21 Hydac Process Technology Gmbh Switching apparatus for a fluid flow
US9004106B2 (en) * 2010-06-25 2015-04-14 Hydac Process Technology Gmbh Switching apparatus for a fluid flow

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