WO2016200400A1 - Système d'actionnement de clapet à deux étages - Google Patents

Système d'actionnement de clapet à deux étages Download PDF

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Publication number
WO2016200400A1
WO2016200400A1 PCT/US2015/035545 US2015035545W WO2016200400A1 WO 2016200400 A1 WO2016200400 A1 WO 2016200400A1 US 2015035545 W US2015035545 W US 2015035545W WO 2016200400 A1 WO2016200400 A1 WO 2016200400A1
Authority
WO
WIPO (PCT)
Prior art keywords
lever
latch
actuation
valve
valve assembly
Prior art date
Application number
PCT/US2015/035545
Other languages
English (en)
Inventor
Dieter A. Tischler
Derek BADE
Original Assignee
Federal Signal Corporation
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Federal Signal Corporation filed Critical Federal Signal Corporation
Priority to PCT/US2015/035545 priority Critical patent/WO2016200400A1/fr
Publication of WO2016200400A1 publication Critical patent/WO2016200400A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K35/00—Means to prevent accidental or unauthorised actuation
    • F16K35/02—Means to prevent accidental or unauthorised actuation to be locked or disconnected by means of a pushing or pulling action
    • F16K35/022—Means to prevent accidental or unauthorised actuation to be locked or disconnected by means of a pushing or pulling action the locking mechanism being actuated by a separate actuating element
    • F16K35/025—Means to prevent accidental or unauthorised actuation to be locked or disconnected by means of a pushing or pulling action the locking mechanism being actuated by a separate actuating element said actuating element being operated manually (e.g. a push-button located in the valve actuator)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/002—Manually-actuated controlling means, e.g. push buttons, levers or triggers
    • B05B12/0022—Manually-actuated controlling means, e.g. push buttons, levers or triggers associated with means for restricting their movement
    • B05B12/0024—Manually-actuated controlling means, e.g. push buttons, levers or triggers associated with means for restricting their movement to a single position
    • B05B12/0026—Manually-actuated controlling means, e.g. push buttons, levers or triggers associated with means for restricting their movement to a single position to inhibit delivery
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/18—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float
    • F16K31/32—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float actuating a tap or cock
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
    • G05G1/30—Controlling members actuated by foot
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G5/00—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member
    • G05G5/005—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member for preventing unintentional use of a control mechanism

Definitions

  • Waterblasting devices typically include a valve assembly and a trigger element for actuating the valve assembly to direct a high-pressure blast of fluid, such as water, against various surfaces such as concrete, metal, and the inside of tubes and vessels.
  • Certain examples of waterblasting devices use a foot-operated valve assembly where an operator needs to operate a cleaning lance by hand.
  • the foot- operated valve assembly typically includes a base, a valve mounted to the base, and a pedal for operating the valve. The valve is actuated when an operator simply depresses the pedal, and a high-pressure fluid is developed at the cleaning lance at hand.
  • the valve actuation system includes a safety latch configured to at least partially cover an actuation lever, such as a foot pedal, to prevent inadvertent operation of the actuation lever.
  • the safety latch needs to be lifted to gain access to the actuation lever in a first stage, and then the actuation lever is operated to actuate a valve assembly in a second stage.
  • the apparatus may include an actuation lever, a safety latch, and a biasing member.
  • the actuation lever has a first lever portion and a second lever portion.
  • the actuation lever is pivotally connected to the valve assembly at the first lever portion, and the second lever portion is operated such that the actuation lever pivots between a first lever position and a second lever position. In the first lever position, the first lever portion disengages the valve assembly to prevent fluid flow through the valve assembly, and in the second lever position, the first lever portion engages the valve assembly to permit fluid flow through the valve assembly.
  • the safety latch has a first latch portion and a second latch portion.
  • the safety latch is pivotally connected to the actuation lever to pivot between a first latch position and a second latch position.
  • the actuation lever In the first latch position, the actuation lever is in the first lever position, the second latch portion covers at least a portion of the second lever portion, and the first latch portion is configured to prevent the actuation lever from pivoting from the first lever position to the second lever position.
  • the second latch portion In the second latch position, the second latch portion is lifted away from the second lever portion and the actuation lever is in the second lever position.
  • the biasing member is engaged between the actuation lever and the safety latch and configured to bias the actuation lever to the first lever position and the safety latch to the first latch position.
  • the method may begin with providing an actuation device.
  • the actuation device may include an actuation lever having a first lever portion and a second lever portion and pivotally connected to the valve assembly at the first lever portion; a safety latch having a first latch portion and a second latch portion, the safety latch pivotally connected to the actuation lever between the first and second latch portions; and a biasing member engaged between the actuation lever and the safety latch.
  • the method may further include raising the second latch portion of the safety latch from a first latch position to pivot about the actuation lever until the second lever portion is accessible; and depressing the second lever portion of the actuation lever from a first lever position to enable the actuation lever to pivot about the valve assembly until the first lever portion engages and actuates the valve assembly to permit fluid flow therethough; and releasing the second lever portion of the actuation lever to enable the actuation lever return to the first lever position and the safety latch to return to the first latch position by the biasing member.
  • the valve system may include a valve assembly, an actuation lever, a safety latch, and a biasing member.
  • the valve assembly may include a valve body and a valve closure element received in the valve body.
  • the valve closure element is movable between a first valve position in which the valve closure element closes the valve assembly to prevent fluid flow therethrough and a second valve position in which the valve closure element opens the valve assembly to permit fluid flow therethrough.
  • the actuation lever has a first lever portion and a second lever portion. The actuation lever is pivotally connected to the valve body at the first lever portion, and the second lever portion is operated such that the actuation lever pivots between a first lever position and a second lever position.
  • the safety latch has a first latch portion and a second latch portion.
  • the safety latch is pivotally connected to the actuation lever to pivot between a first latch position and a second latch position.
  • the actuation lever is in the first lever position
  • the second latch portion covers at least a portion of the second lever portion
  • the first latch portion is configured to prevent the actuation lever from pivoting from the first lever position to the second lever position.
  • the second latch portion is lifted away from the second lever portion and the actuation lever is in the second lever position.
  • the biasing member is engaged between the actuation lever and the safety latch and configured to bias the actuation lever to the first lever position and the safety latch to the first latch position.
  • Figure 1 is a schematic perspective view of an example valve system accordance with the present disclosure.
  • Figure 2 is a perspective view of an example actuation device of the valve system of Figure 1.
  • Figure 3 is a schematic side view of the valve system of Figure 1.
  • Figure 5 illustrates that the actuation device is in a first position.
  • Figure 6 illustrates that the actuation device is in a second position.
  • Figure 7 illustrates that the actuation device is in a third position.
  • Figure 8 illustrates another example of the actuation device.
  • Figure 9 illustrates an example operation of the actuation device using an operator's foot.
  • Figure 10 illustrates a different position of the actuation device of Figure 9.
  • Figure 11 illustrates a different position of the actuation device of Figure 9.
  • Figure 12 illustrates a different position of the actuation device of Figure 9.
  • Figure 1 is a schematic perspective view of an example valve system 100 in accordance with the present disclosure.
  • Figure 2 is a perspective view of an example actuation device of the valve system 100.
  • Figure 3 is a schematic side view of the valve system 100 of Figure 1.
  • Figure 4 is a schematic front view of the valve system 100 of Figure 1.
  • the valve system 100 is configured to direct a high pressure blast of a fluid, such as water, against various surfaces, such as concrete, metal, and the inside of tubes and vessels, to clean coatings, deposits, seals, and other unwanted deposits therefrom.
  • a fluid stream used in the cleaning operation can has a pressure in the range about 5,000-20,000 psi in some examples.
  • Such high pressure fluid streams can be controlled by the valve system 100.
  • the valve system 100 can include a valve assembly 102 and an actuation device 104.
  • Some examples of the valve assembly 102 are illustrated in U.S. Patent No. 6,182,686, titled FOOT VALVE SAFETY COVER APPARATUS, issued February 6, 2001, and U.S. Patent No. 5,423,348, titled SHUT-IN SPRAY GUN FOR HIGH PRESSURE WATER BLAST CLEANING, issued June 13, 1995, the disclosure of which are incorporated herein by reference in their entireties.
  • Other configurations of the valve system 100 are also possible.
  • the valve assembly 102 can include a valve body 106 and a valve closure element 108.
  • the valve body 106 defines an inlet port for a source of fluid (e.g., water) under high pressure and an outlet port for discharging fluid under high pressure through a hose or tubing to a spray gun or cleaning lance (not shown).
  • the valve closure element 108 is supported within the valve body 106 and movable to selectively open a passage between the inlet and the outlet to permit fluid flow through the valve assembly 102 and close the passage to prevent fluid flow therethrough.
  • the valve closure element 108 is configured to slide along a length L ( Figure 3) thereof to selectively open and close the valve assembly 102.
  • the valve closure element 108 is configured to engage the actuation device 104 such that the actuation device 104 moves the valve closure element 108 between a first valve position and a second valve position.
  • the actuation device 104 can engage a head portion 110 of the valve closure element 108.
  • the valve closure element 108 closes the valve assembly 102 to prevent fluid flow therethrough.
  • the valve closure element 108 opens the valve assembly 102 to permit fluid flow therethrough.
  • valve closure element 108 can move gradually between the first and second valve positions, such that the valve closure element 108 adjusts the amount of fluid flowing through the valve assembly 102 depending on the position of the valve closure element 108 between the first and second valve positions.
  • the valve closure element 108 can be biased to the first valve position.
  • the valve assembly 102 as described above can be referred to as a shut- in type valve (i.e., the valve is closed to stop fluid flow when the foot pedal is released to its upward position, and the valve is open to permit fluid flow when the foot pedal is depressed).
  • the valve assembly 102 in the present disclosure is primarily described as a shut-in type valve assembly. However, other embodiments of the valve assembly 102 can be of different types.
  • the valve assembly 102 can be a dump type valve. In a dump type valve assembly, when the foot pedal is depressed, the valve closes off an otherwise open port to direct water flowing into the valve to a tool having a nozzle (e.g., a spray gun or cleaning lance).
  • a valve cartridge e.g., the valve closure element 108
  • a valve cartridge can be biased (e.g., by a spring element) to push back the actuation lever 120 (including the foot pedal) and lift the foot pedal up when not in use (i.e., when released or not depressed).
  • the spring element can be adapted to lift the actuation lever 120 and the safety latch 122 together (with the safety latch 122 covering the actuation lever 120) not to actuate the valve cartridge when not in use.
  • a biasing member 124 is configured to bias the safety latch 122 to close against the actuation lever 120 when the actuation lever 120 (e.g., the foot pedal) is in the upward position (e.g., the first lever position).
  • the biasing member 124 can also contribute to a lifting force that causes the actuation lever 120 to return into its upward position (e.g., the first lever position) through the contact end 146 of the safety latch 122 as the actuation lever 120 (i.e., the foot pedal) is released from its depressed position (e.g., the second lever position).
  • the actuation device 104 can include an actuation lever 120, a safety latch 122, and a biasing member 124.
  • the actuation lever 120 has a first lever portion 130 and a second lever portion 132.
  • the first lever portion 130 of the actuation lever 120 is pivotally connected to the valve body 106 at a pivot point 134.
  • a pin 136 can be used to pivotally support the actuation lever 120.
  • the first lever portion 130 has a tang portion 138 configured to engage the head portion 110 of the valve closure element 108 to actuate the valve assembly 102.
  • the second lever portion 132 provides an interface for an operator to control the actuation lever 120, thereby triggering the valve assembly 102.
  • the second lever portion 132 is configured as a foot pedal on which an operator steps to depress the actuation lever 120.
  • the second lever portion 132 is configured to be operated in different manners, such as by hand.
  • the actuation lever 120 can pivot between a first lever position and a second lever position. In the first lever position, as illustrated in Figures 2 and 3, the actuation lever 120 remains unactuated, and the first lever portion 130 (e.g., the tang portion 138) disengages the valve closure element 108 so that the valve closure element is in the first valve position (i.e., the valve assembly 102 is closed).
  • the first lever portion 130 e.g., the tang portion 138
  • the actuation lever 120 As the actuation lever 120 is actuated by depressing the second lever portion 132, the actuation lever 120 moves to the second lever position as illustrated in Figure 1, and the first lever portion 130 (e.g., the tang portion 138) engages and pushes the valve closure element 108 so that the valve closure element moves to the second valve position (i.e., the valve assembly 102 is open). As described below, the actuation lever 120 can be biased to the first lever position by the biasjng member 124.
  • the safety latch 122 includes a first latch portion 140 and a second latch portion 142.
  • the safety latch 122 is pivotally connected to the actuation lever 120 at a pivot point 144 so as to pivot between a first latch position and a second latch position.
  • the pivot point 144 is arranged between the first latch portion 140 and the second latch portion 142 of the safety latch 122.
  • the pivot point 144 is also arranged between the first lever portion 130 and the second laver portion 132 of the actuation lever 120.
  • the first latch portion 140 has a contact end 146, which is an end of the safety latch 122 opposite to the pivot point 144.
  • the contact end 146 of the first latch portion 140 is configured to contact the support surface 90 depending on a position of the safety latch 122 relative to the actuation lever 120 and/or the valve assembly 102. Further, the contact end 146 is configured to move along, or slide on, the support surface 90 as the safety latch 122 changes its position relative to the actuation lever 120 and/or the valve assembly 102, as described below.
  • the safety latch 122 includes a rolling element 148 arranged at the contact end 146.
  • the rolling element 148 is configured to roll on the support surface 90 as the contact end 146 of the first latch portion 140 moves along the support surface 90.
  • One example of the rolling element 148 is a roller made of acetal. Other embodiments of the rolling element 148 are also possible.
  • a spacer bush 150 is disposed with the rolling element 148 at the contact end 146.
  • the second latch portion 142 is a portion of the safety latch 122 that extends from the pivot point 144 at a side opposite to the first latch portion 140.
  • the first and second latch portions 140 and 142 generally form an L-shape, as illustrated in Figures 1-4.
  • Other configurations of the safety latch 122 are also possible.
  • the second latch portion 142 is configured to cover at least a portion of the second lever portion 132 of the actuation lever 120 in the first latch position.
  • the second latch portion 142 has a lifting end 152 configured to extend over the second lever portion 132 when the safety latch 122 is in the first latch position (i.e., the actuation lever 120 is in the first lever position).
  • the lifting end 152 is used as an interface for an operator to raise the safety latch 122 from the first latch position to the second latch position. For example, as illustrated in Figures 9- 12, an operator can engage his or her toe with the lifting end 152 and lift up the safety latch 122 with the toe.
  • the lifting end 152 can include a hooked portion 166 that extends from the second latch portion 142.
  • the hooked portion 166 is configured to further extend over the free end of the second lever portion 132 of the actuation lever 120. This configuration can ease the lifting of the safety latch 122.
  • the hooked portion 166 can prevents an operator's foot from being inadvertently engaged with the second lever portion 132 before lifting the safety latch 122.
  • the hooked portion 166 can rather lead the operator's foot under the actuation lever 120 (e.g., the foot pedal), and enable the foot to first lift the safety latch 1222 before operating the actuation lever 120.
  • the safety latch 122 can pivot between the first latch position and the second latch position.
  • the second latch portion 142 of the safety latch 122 covers at least a portion of the second lever portion 132, which is in the first lever position (i.e., the actuation lever 120 is in an unactuated position).
  • the contact end 146 of the first latch portion 140 can be in contact with the support surface 90, in some embodiments. In other embodiments, in the first latch position, the contact end 146 of the first latch portion 140 is adjacent the support surface 90 but is not in contact with the support surface 90.
  • the actuation lever 120 is in the first lever position, and the valve assembly 102 remains closed, because the valve closure element 108 is not actuated by the actuation lever 120.
  • This configuration can be referred to herein as the actuation device 104 being in a first position.
  • the first position, the first latch position, and the first lever position can be interchangeably used to refer to the same position of the valve system 100 and the associated elements therein.
  • the safety latch 122 in the first latch position can prevent the actuation lever 120 from pivoting from the first lever position to the second lever position, due to the geometry of the safety latch 122 in the first latch position.
  • a distance Dl between the pivot point 144 and the contact end 146 of the first latch portion 140 is configured such that the actuation lever 120 remains in the first lever position when the safety latch 122 is in the first latch position.
  • the actuation lever 120 is prevented from moving toward the second lever position, thereby prohibiting the actuation of the valve assembly 102.
  • the contact end 1 6 contacts a front surface of the valve box 106 to resist the depressing force.
  • the contact end 146 can contact a front wall 160 ( Figure 5) of the cover 159 as the second latch portion 140 is depressed.
  • the safety latch 122 As the safety latch 122 is raised by lifting up the lifting end 152 of the second latch portion 142, the safety latch 122 moves from the first latch position to the second latch positon as illustrated in Figure 1 (and Figures 6 and 7). While moving from the first latch position to the second latch position, the first latch portion 140 moves along the support surface 90 away from the valve assembly 102. As the first latch portion 140 moves away from the valve assembly 102, a height H of the pivot point 144 from the support surface 90 decreases so that the actuation lever 120 is lowered from the first lever position toward the second lever position (close to the support surface 90).
  • the safety latch 122 moves from the first latch position toward the second latch position (e.g., a position as illustrated in Figure 6), the second latch portion 142 is lifted up enough to expose the second lever portion 132 and enable an operator to access the second lever portion 132 and depress it to the second lever position.
  • the safety latch 122 can be biased to the first latch position while the actuation lever 120 is biased to the first lever position.
  • the biasing member 124 is engaged between the actuation lever 120 and the safety latch 124 to bias the actuation lever 120 to the first lever position and the safety latch 122 to the first latch position.
  • the biasing member 124 can be of various types.
  • the biasing member 124 is a torsion spring having a coil portion and two prongs. The coil portion can be disposed coaxially with the pivot point 144 while the prongs rest against the actuation lever 120 and the safety latch 122, respectively.
  • a first prong 154 of the torsion spring engages a bottom surface of the second lever portion 132 while a second prong 156 of the torsion spring engages a support structure 158 (e.g., a transverse pin) disposed along the width of the second latch portion 140.
  • a support structure 158 e.g., a transverse pin
  • Figure 5 illustrates the actuation device 104 is in a first position
  • Figure 6 illustrates the actuation device 104 is in a second position
  • Figure 7 illustrates the actuation device 104 is in a third position.
  • the valve system 100 includes a safety cover 159 ( Figures 9-12) configured to at least partially surround the actuation device 104.
  • a safety cover 159 Figures 9-12
  • An example of the safety cover is described in U.S. Patent Application No. 6,182,686, titled FOOT VALVE SAFETY COVER APPARATUS, issued February 6, 2001, the disclosure of which is incorporated herein by reference in its entirety.
  • the safety cover 159 includes a wall 160 configured to divide the valve assembly 102 and the actuation device 104.
  • the wall 160 defines a slot 162 through which the first lever portion 130 of the actuation lever 120 extends.
  • the actuation device 104 is operated in two stages. For example, the actuation device 104 moves from the first position ( Figure 5) to the second position ( Figure 6) in the first stage, and subsequently from the second position to the third position ( Figure 7) in the second stage.
  • the two-stage actuation device 104 according to the present disclosure can prevent an operator from inadvertently actuating the valve system 102 by stepping on the actuation lever 120.
  • the actuation lever 120 cannot be depressed when the safety latch 122 is in the first position (i.e., when the safety latch 122 covers the actuation lever 120). Operators need to get properly balanced and in position to raise the safety latch 122 to gain access to the actuation lever 120 and then operate the actuation lever 120 to actuate the valve assembly 102.
  • the actuation lever 120 When the actuation device 104 is in the first position, as illustrated in Figure 5, the actuation lever 120 is in the first lever position, and the safety latch 122 is in the first latch position, as described above. In the first position, the tang portion 138 of the actuation lever 120 is apart from the head portion 110 of the valve closure element 108, and thus the valve assembly 102 remains closed. As described herein, in the first position, the safety latch 122 covers the second lever portion 132 to prohibit access to the second lever portion 132.
  • the first latch portion 140 When the safety latch 122 is depressed, for example, by an operator who accidentally steps down on the second latch portion 142 of the safety latch 122, the first latch portion 140 functions to resist the depressing force with the contact end 146 abutted to the support surface 90 (or the wall 160 of the safety cover), thereby preventing the actuation lever 120 from moving to the second lever position to actuate the valve closure element 108.
  • the safety latch 122 When the safety latch 122 is lifted from the actuation lever 120, the actuation device 104 moves from the first position ( Figure 5) to the second position ( Figure 6). As illustrated in Figure 9, the safety latch 122 can be raised when an operator lifts up the lifting end 152 of the second lever portion 142 with the operator's toe or hand. Where the biasing member 124 is used, the safety latch 122 is lifted against a restoring force of the biasing member 124.
  • the actuation lever 120 moves away the first lever position, the actuation lever 120 does not engage the valve closure element 108 yet in the second position.
  • the actuation device 104 can be configured such that the actuation lever 120 at least slightly engages the valve closure element 108 to actuate it to at least partially open the valve assembly 102 when it is in the second position. Other configurations are also possible in yet other embodiments.
  • the actuation lever 120 When the actuation device 104 is in the third position, as illustrated in Figure 7, the actuation lever 120 is in the second lever position, and the safety latch 122 is in the second latch position, as described above. In some embodiments, the actuation lever 120 is fully depressed and the safety latch 122 is completely out of the way. In the third position, the tang portion 138 of the actuation lever 120 engages the head portion 110 of the valve closure element 108 and actuates the valve closure element 108 to open the valve assembly 102.
  • the actuation lever 120 can move to the second lever position when an operator depresses the second lever portion 132 (e.g., by stepping down on the foot pedal thereof).
  • a height H3 of the pivot point 144 from the support surface 90 further decreases (i.e., the height H3 is smaller than the height H2, which is smaller than the height HI), and the contact end 146 of the first latch portion 140 slides along the support surface 90 further away from the valve assembly 102. Accordingly, the second latch portion 142 of the safety latch 122 is further lifted up.
  • the action of depressing the actuation lever 120 e.g., the second lever portion 132 thereof
  • the action of depressing the actuation lever 120 can automatically rotates the safety latch 122 further about the pivot point 144 so that the safety latch 122 further opens up for access to the actuation lever 120. Therefore, it is not necessary to fully lift the safety latch 122 before operating the actuation lever 120.
  • the operator can then depress the actuation device 104 by stepping down on the second lever portion 132 (e.g., the foot pedal).
  • the safety latch 122 is further lifted. Once the operator removes the foot F from the actuation device 104 tc release the actuation lever 120, the safety latch 122 returns to the first latch position and the actuation lever 120 returns to the first lever position by the biasing member 124, so that the actuation device 104 returns to the first position as illustrated in Figures 5 and 9.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanically-Actuated Valves (AREA)

Abstract

Système de clapet à deux étages comprenant un fermoir de sécurité conçu pour recouvrir au moins partiellement un levier d'actionnement (120), tel qu'une pédale, afin d'empêcher tout actionnement par inadvertance du levier d'actionnement. Le fermoir de sécurité (122) a besoin d'être soulevé jusqu'à un certain niveau pour avoir accès au levier d'actionnement dans un premier étage, et ensuite le levier d'actionnement est actionné pour actionner un ensemble clapet dans un second étage.
PCT/US2015/035545 2015-06-12 2015-06-12 Système d'actionnement de clapet à deux étages WO2016200400A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2015/035545 WO2016200400A1 (fr) 2015-06-12 2015-06-12 Système d'actionnement de clapet à deux étages

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2015/035545 WO2016200400A1 (fr) 2015-06-12 2015-06-12 Système d'actionnement de clapet à deux étages

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WO2016200400A1 true WO2016200400A1 (fr) 2016-12-15

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB227372A (en) * 1924-07-18 1925-01-15 Sydney Maddison Improvements in gas and other taps, cocks and the like
US3916722A (en) * 1974-10-17 1975-11-04 Square D Co Treadle operated control
US5423348A (en) * 1993-09-30 1995-06-13 J. Edward Stachowiak Shut-in spray gun for high pressure water blast cleaning
WO2004088185A1 (fr) * 2003-02-19 2004-10-14 Sil-Sang Park Manette repliable pour soupape à bille
WO2009047701A2 (fr) * 2007-10-10 2009-04-16 Lance Charles Dixon Clapet
WO2014189655A1 (fr) * 2013-05-23 2014-11-27 Finishing Brands Holdings Inc. Système de verrouillage d'outil de pulvérisation

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB227372A (en) * 1924-07-18 1925-01-15 Sydney Maddison Improvements in gas and other taps, cocks and the like
US3916722A (en) * 1974-10-17 1975-11-04 Square D Co Treadle operated control
US5423348A (en) * 1993-09-30 1995-06-13 J. Edward Stachowiak Shut-in spray gun for high pressure water blast cleaning
WO2004088185A1 (fr) * 2003-02-19 2004-10-14 Sil-Sang Park Manette repliable pour soupape à bille
WO2009047701A2 (fr) * 2007-10-10 2009-04-16 Lance Charles Dixon Clapet
WO2014189655A1 (fr) * 2013-05-23 2014-11-27 Finishing Brands Holdings Inc. Système de verrouillage d'outil de pulvérisation

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