Abstract: An acoustic liner 20 includes a remote panel 26, a proximate panel 28 transversely spaced from the remote panel and a resonator chamber 34b residing between the panels. Perforations 38 penetrate the proximate panel in registration with the resonator chamber 34b. A neck 56 with an inlet 58 recessed from the proximate panel establishes communication between the chamber and a fluid stream G flowing past the proximate panel. A bypass coolant passage 66 guides coolant through the perforations without guiding it through the resonator chamber.

Abstract: A room acoustic diffuser exploits interference, by reflecting waves out-of-phase with the specular energy, making it possible to diminish specular energy. This is achieved by using a diffuser based on a ternary sequence, which nominally has reflection coefficients of 0, ?1 and +1. A method for obtaining the design sequence for Quaternary diffusers is also disclosed. Also, design methods for forming the sequences into arrays, and forming hemispherical diffusers are explained.

Abstract: The aid provides a manner of supporting a plank, on a roof, for workers to stand on. The plank is carried on plank-jacks, but the plank-jacks are not attached directly to the roof joists. Rather, the plank-jacks are suspended via rope-slings from a pair of ridge saddles, which are firmly and safely secured to the ridge of the roof. The rope-slings are adjustable, and the worker can very readily adjust the working level of the plank.

Abstract: A sectional overhead ladder with a fold assist feature for controlling the extension of the sectional overhead ladder. The fold assist feature of the sectional overhead ladder limits the possibility of free extension of the extendable overhead ladder by preventing gravitational forces from causing the ladder sections to fall into their extended configuration. The sectional overhead ladder includes generally a stair structure and an extendable dampening system. The extendable dampening system is comprised of a dampener and, optionally, a housing. The stair structure includes a first section and a second section. The dampening system is attached to the first and second sections of the stair structure such that the dampener limits the free extension of the stair structure and assists with the collapse of the stair structure.

Abstract: Disclosed is a pneumatic grease applicator includes a receptacle in which a retainer that retains a bearing to which grease is to be applied and a presser that securely holds the presser on the retainer are movably received. The receptacle has a bottom nozzle through which grease is continuously supplied from an external source under a pneumatically induced driving force, whereby the grease can be consecutively applied to a number of bearings without interrupts. Sealing members are provided between the retainer and the presser and side wall of the receptacle to prevent leakage of grease.

Abstract: An elevator installation has a support device engaging a driven drive pulley for driving an elevator car. The support device loops around the drive pulley at least partly and has a safety section which is so arranged that the safety section interacts with the drive pulley when the elevator car or a counterweight after overrunning an upper position approaches an upper shaft end. The safety section is formed in such a manner that a slipping through results due to the interaction between the drive pulley and the support device.

Abstract: The present invention relates to an elevator system for use during an emergency. The elevator system comprises two elevator shafts constructed adjacent to each other. Each elevator shaft houses an elevator car. The elevator system operates without the use of a building's power source by incorporating a primary pulley system to move the elevator cars. Generally, the elevator cars work in tandem such that as one elevator car goes up its respective elevator shaft, the other elevator car will go down its respective elevator shaft. Moreover, a secondary pulley system and a gear system are employed to also facilitate movement of the elevator cars without using the building's power supply.

Abstract: In an elevator installation, an apparatus and a method use a support end connection for fastening a support device to an elevator car, a counterweight and/or a building. The support device has at least one cable or cable strand enclosed by a cable casing and is held in a wedge pocket by a wedge. The cable casing is formed of thermoplastic material or an elastomer and the cable or the cable strand is glued to, fused together with or mechanically connected with the cable casing in the region of the support end connection. A friction force transmitted from the support end connection to the cable casing can then be directly passed on to the load-bearing core of the support device, to the cables or to the cable strands. The tolerable tension force in the support device is increased. The support device is preferably a multiple cable.

Abstract: The safety device according to the invention for maintenance personnel in elevators having no machine rooms and flexible tension member, the elevator booth comprising an upper median crosspiece (5) on its roof forming part of its support arcade is characterized in that it comprises, with symmetry with respect to the median traction plane of the booth or to the median plane of the set of flexible tension members (17), at least two rigid rods (9) mounted sliding on the crosspiece (5) on one side and approximately parallel to the latter and able to be moved in an active outgoing position projecting from the crosspiece (5) so as to come opposite and simultaneously in contact with a corresponding stop (23) fixed at an adequate height on the booth guide rail (21), and in an inactive incoming position where they are out of range of said stop (23) corresponding to the normal functioning of the elevator.

Abstract: A brake device for a power tool has a brake assembly, a bearing portion, a pinion and a gearbox. The brake assembly includes a brake base, a cover, a first throttle cable, a second throttle cable, a brake-activating block, a brake-guiding pillar, a brake band and a brake drum. The first throttle cable, the brake-activating block and the second throttle cable are linearly connected together in series. The brake-activating block is designed to abut against the brake-guiding pillar in a brake position and a release position, respectively. With the relative movement among the first throttle cable, the brake-activating block and the brake-guiding pillar, the abutting or separating state between the brake band and the brake drum can be easily controlled.

Abstract: Provided is a disk brake system for automotive vehicles capable of pressing a brake pad against a circumferential surface of a brake disk in a braking operation, thus making sure that heat can be readily dissipated from a friction surface with a minimized possibility of thermal deformation of the brake disk, which would otherwise cause a judder phenomenon to the disk, thereby assuring a stabilized braking operation, an improved braking performance and a reduced weight of the brake system. The disk brake system includes a disk with a circumferential braking surface, a caliper having a wheel cylinder and a piston extendibly received in the wheel cylinder, and a brake pad attached to a frontal end of the piston in a confronting relationship with the circumferential surface of the disk for making contact with the circumferential surface of the disk in response to actuation of the piston.

Abstract: A gearbox having an integral wet brake assembly is provided to replace the prior gearbox assembly of an underground mining machine. The brake housing is configured and contoured to be nestingly received upon the gearbox housing and without intrusion upon the output drive flanges. The brake housing includes concentric parking and service brake pistons adapted to engage and disengage a brake disc stack provided within a cavity machined into an end plate of the gear box assembly. An intermediate shaft of the gearbox is provided with a hub to engage the rotary discs of the brake disc stack. The parking brake is normally engaged by a spring and released by hydraulic pressure, while the service brake is normally released by a spring and engaged by hydraulic pressure.

Abstract: An electric disk brake for a vehicle, includes an electric motor in which a brush coming into slide contact with a commutator provided on an output shaft rotatably supported in a motor housing is held by a brush holder secured to the motor housing, and a rotation angle detection sensor for detecting a rotation angle of the electric motor. A brake piston driven by the electric motor is slidably fitted to a caliper body. A detected portion to be detected by the rotation angle detection sensor housed and placed in the motor housing is provided on the output shaft in the motor housing. Thus, the rotation angle detection sensor can be provided without any special waterproof seal and with a reduced number of components.

Abstract: This invention discloses a type of drum brake that can be used for automobiles, comprising a brake drum, one or more brake shoes, and one ore more brake cylinders. Its special characteristics are: the drum brake further comprises an ordinary gear train which comprises an annulus, one or more planetary gears and a sun gear. Here, the annulus is attached to the brake drum. The sun gear and a mounting shell of the brake shoes are attached to each other. The planetary gears are located between the annulus and the sun gear, and one ore more planetary gear axles of the respective planetary gears are affixed with one or more planetary carriers. By adopting the drum brake of this invention and the ordinary gear train, when the brake is applied, the brake shoes rotate in the opposite direction relative to the moving direction of the brake drum, thereby greatly reduce the braking distance and braking time.

Abstract: To provide the mechanical brake actuator enabling to downsize the device and to reduce the manufacturing costs of the parts. The mechanical brake actuator comprises the strut (23) which engages with one brake shoe (12) and has two facing plates (23b) with a strut-bridge (23a) connecting therebetween and the plate-like brake lever (24) which engages with the other brake shoe (13). The brake lever (24) is retained in the space (23c) between the facing strut plates and is pivotally supported on the strut (23), and the inner cable (41) of the brake cable (40) connected to the free end (24e) of the brake lever (24) via the connecting pin (43). The mechanical brake actuator which is operated by pulling the inner cable (41) comprises the clip (30), which attaches to the strut-bridge (23a) and restricts the rotation of the brake lever (24) in the cable releasing direction.

Abstract: A disc brake pad including a brake lining having at least one friction surface, and provided with a heat dissipating structure which circulates the heat to be dissipated in one or more directions substantially parallel to the plane of the friction surface. The structure is arranged in the lining and/or in a carrier plate if there is one, or at the interface. The structure may be formed from cylindrical holes with axes following one or more directions substantially parallel to the friction surface. These holes are through holes, such that the air can freely pass therethrough. The structure may also be formed from projections at the periphery of the carrier plate, optionally fitted with cooling fins, or bars which are good heat conductors enclosed a component of the pad.

Abstract: A control structure for a shock absorber that comprises: a base, a control assembly, and a moving assembly. The control assembly controls the motion of the moving assembly and is moved by a steel cable. A control member and a returning spring of the control assembly serve to control the motion of the moving assembly. The steel cable drives the control member to move, and the returning spring provides an elastic force for returning the relative components to their original positions. The shock absorber is defined with a working space for reception of the moving assembly. The moving assembly is provided with sliding members, and is formed with slopes form cooperating with the sliding members. When the control member drives the moving assembly to move, the pushing member of the moving assembly will push the sliding members from the deep portion to the shallow portion of the moving member, thus making the pushing rod move.

Abstract: A shock absorber having a valve controlling the flow rate of fluid between a compression chamber and a rebound chamber in a housing and separated by a piston. The valve has an orifice component and a blocker component, one of which has a permanent magnet, and the other of which has a magnetically permeable material. Upon the application of sufficient fluid pressure, the blocker component is forced away from the orifice component, despite the magnetic bias that tends to attract the two structures. Because the magnetic force decreases as the two components are spaced farther apart, the shock absorber has excellent performance characteristics. Alternatively, a mechanical spring urges the blocker closed, and magnetic attraction between the blocker and a spaced opener mitigates the increased force of the compressed spring tending to close the valve.

Abstract: An improved bushing assembly for the center seal used with an adapter base separating pressure chambers in a spring brake actuator to allow a push rod to pass through an aperture therein without loss of pressurized fluid between the pressure chambers. The improved bushing assembly has a flexing component that allows for non-linear or flexing motion of the push rod, a sealing component for sealably engaging the push rod and a locking component for securing the bushing assembly inside the aperture. The improved bushing prevents damage to the sealing member and aperture from the non-linear push rod motion. The flexing component comprises a bushing member having an inner wall and outer wall that form a channel therebetween. The outer wall has engagement tabs to lockingly engage a groove in the aperture to secure the bushing assembly therein. A spring brake adapter is provided that utilizes the improved bushing assembly.

Abstract: A valve assembly progressively opens to provide a smooth transition from a closed position to an open position. The fluid pressure reacts against a valve plate in a non-symmetrical manner to progressively open the valve. The valve can include a plurality of varying sized fluid passages or valve lands can be positioned eccentrically to each other to provide a non-symmetrical pressure area.

Abstract: A hydraulic brake device is disclosed.

Abstract: The present invention relates to an energy dissipation device with a first force-transferring element, a second force-transferring element, and a first and second energy dissipation element which are disposed in the energy dissipation device such that the force flow taking place during the transfer of the tractive and impact forces in the longitudinal direction of the energy dissipation device runs parallel through the two energy dissipation elements. By the activation behavior of the individual energy dissipation elements being chosen appropriately, the total characteristic curve of the energy dissipation device can be precisely determined in advance. In particular, the invention makes possible the construction of energy dissipation devices with force-path characteristic curves with regions of the characteristic curve, which fall off sharply.

Abstract: A torque converter clutch for a constant slip application including a cover, a friction plate secured to the cover, and at least one channel between the cover and the friction plate. In another embodiment, the torque converter clutch may further include a one-way valve operatively arranged to permit a fluid to flow out of a channel, while preventing the fluid from flowing in through the channel.

Abstract: An overrunning clutch (24) has first and second clutch members (30, 32) having coupling faces (34) and (36) between which spring biased pivotal struts (40) and locking formations (44) cooperate to prevent relative rotation in only one direction. A snap ring (48) and thrust plate (50) cooperate to axially secure the clutch members (30) and (32) to each other and the thrust plate has a retainer (52) projecting therefrom to prevent rotation. The retainer (52) in certain embodiments is received between ends (58) of the snap ring (48) to prevent thrust plate rotation.

Abstract: A drive force transmission device includes a first direction one-way clutch, a second direction one-way clutch, a second direction rotation transmission clutch, a cam mechanism and a regulating member. The first direction one-way clutch and the second direction one-way clutch are arranged to connect first and second force transmission paths between an input shaft and an output shaft to transmit rotation in first and second rotational directions, respectively. The second direction rotation transmission clutch is arranged to connect the second direction one-way clutch with the output shaft. The regulating member is coupled to the cam mechanism to regulate movement of the cam mechanism to maintain a disengaged state of the second direction rotation transmission clutch. The regulating member is arranged to be non-rotatable in response to rotation of the input shaft in the first rotational direction.

Abstract: A clutch for vehicles comprises a driving member (10) and a driven member (22) coaxial to the driving member, with a pack of clutch plates between them which are alternatively connected to the driving member and to the driven member, a pressure member (38) engaged by elastic means (44) to push the clutch plates against a ledge (10b) of the driven member, a floating member (20) that is axially translatable between the driven member (10) and the pressure member (38), and driving means (22, 24, 26) on said driving member and floating member which are in mutual, rotary and shifting engagement to axially push the floating member (20) against the pressure member in contrast to said elastic means. The driving means comprises rollers (22) each pivotally supported by the driving member (10) about a substantially radial axis to engage respective inclines (26s) that are frontally made on the floating member.

Abstract: An overload clutch is described, having two clutch bodies (11, 12), one of which is mounted rotationally fixed and the other of which is mounted so it is rotatable on a clutch carrier (3), and which may be coupled in the axial direction, of which the axially displaceably mounted clutch body (12) is impinged to disengage, and having a holding unit adjustable as a function of the size of the transmitted torque for the clutch engagement. In order to provide advantageous triggering conditions, it is suggested that the holding unit comprise a switching unit (16), which releases the axial actuator travel of the displaceably mounted clutch body (12) and may be actuated by an actuating drive connected to an energy accumulator (23).

Abstract: A wheel hub with clutch where power is transferred through a drive, such as a chain that is linked between a peddle arrangement and a gear or gears splined onto the hub. The hub provides free-wheeling when torque is not applied thereto and will instantly engage, transferring an applied torque therethrough and into a wheel connected to the hub when torque is applied as through a peddle arrangement. For locking, the hub includes, as a radial load bearing component, a sleeve whereon a gear or gears are splined, with the splined gear sleeve mounting a thick ring for fitting into an end of a hub body. The thick ring contains spaced sloping slots, each containing a curved member. The hub body includes an annular ring that receives the thick ring fitted there and has spaced steps, or the like, formed therein to engage the curved members and transfer torque.

Abstract: A power transmission device includes a friction clutch operable to selectively transfer torque between an input member and an output member. An actuator is operable to provide an actuating force to the friction clutch. The actuator includes an electric motor having an output shaft drivingly coupled to a gerotor. The gerotor is operable to provide pressurized fluid to a piston acting on the friction clutch.

Abstract: A clutch assembly for use in a transmission of a motor vehicle is provided including, a stationary frame, a non-rotating apply piston mounted with the frame, a clutch hub torsionally connected with a portion of a friction pack, a clutch housing torsionally connected with another portion of a friction pack, the housing having a stop for the friction pack, an apply bearing with a first race operatively associated with an apply member and a second race operatively associated with the piston, and a reaction bearing with an outer race operatively associated with the frame and an inner race associated with the clutch housing.

Abstract: An article transport device comprises an endless revolving body that is configured to move along a cyclic path in a substantially horizontal direction; a plurality of article supports each of which supports an article, wherein the article supports move together with the endless revolving body with the supports spaced apart from each other in a traveling direction; a support mechanism for supporting the article supports to the endless revolving body such that the article supports can move between a transport position adjacent the endless revolving body and an away position spaced apart from the transport position; and a guide mechanism for causing at least some of the article supports to move from the transport position to the away position and to move from the away position to the transport position, at an article delivering location or an article receiving location along the cyclic path of the endless revolving body.

Abstract: A diverter system includes a conveying surface with a conveying direction for conveying an article at a conveying speed, a first diverter assembly at a first side of the conveying surface, and a second diverter assembly at the second side of the conveying surface. In addition, each of the diverter assemblies includes an arm mounted for pivotal movement between a non-diverting position and a diverting position. When actuated the arm of the actuated diverter assembly is pivoted across at least a portion of the conveying surface. The system further includes a first driver for selectively moving the arm of the first diverter assembly between its diverting position and its non-diverting position and a second driver for selectively moving the arm of the second diverter assembly between its diverting position and its non-diverting position.

Abstract: The invention includes multi-station workpiece processors, methods of processing semiconductor workpieces within multi-station workpiece processors, and methods of moving semiconductor workpieces within multi-station workpiece processors. In one implementation, a multi-station workpiece processor includes a processing chamber comprising multiple stations for processing individual workpieces. A pedestal is associated with individual of the stations. The pedestals are mounted for selective vertical up movement within the chamber to contact a workpiece and for selective vertical down movement within the chamber to be displaced from a workpiece. The pedestals respectively comprise an upper surface upon which an individual workpiece is received during processing within the chamber. At least one workpiece engagement arm is associated with individual of the pedestals.

Abstract: A conveyor belt cleaner scraper blade for cleaning the surface of a conveyor belt and a method of manufacture of the scraper blade. The scraper blade includes a body having a base member adapted to be attached to a cross shaft of a conveyor belt cleaner and a scraping member which extends outwardly from the base member to a scraping tip. The scraper blade includes one or more electrical sensors that are embedded in an insert member. The insert member and the sensors are molded and embedded within the body of the scraper blade. Each of the sensors is adapted to provide an electrical output signal representing a physical condition of the scraper blade sensed by the sensor. A variety of sensor embodiments are described, as well as two embodiments of control and monitoring systems for use in conjunction with the various blade and sensor combinations.

Abstract: Methods and apparatus for a conveyor system for evenly spacing conveyed objects are provided. In one embodiment, the conveyor system includes a conveyor belt that includes a conveyor having cavities, rollers in some of cavities, and a positioning component. The conveyor system further includes a conveyor drive coupled to the conveyor system and a roller engagement surface positioned adjacent the conveyor belt and configured to engage the plurality of rollers.

Abstract: The invention relates to a conveyor belt (1) provided with a bearing side (2) and a backing side (3) made of an elastomer material, in addition to an embedded reinforcement carrier (4), wherein the bearing side (2) is reinforced with ball-type elements (5).

Abstract: A conveyor belt having a longer effective operating life when continuously conveying hot materials of the order of from about 300° F. to about 330° F. and without the need for premature production line shutdowns for belt shortening and resplicing. The belt includes woven upper and lower cotton fiber layers and two intermediate layers of woven polyester fibers. The layers are held together in face-to-back relationship with rubber skim that is subsequently vulcanized. The upper and lower cotton layers are structured to provide heat insulation for the inner polyester fibers.

Abstract: A link of a conveyor chain is connectable to a similar and adjacent link and has a main base body with two shoulders, protruding upward from ends of transverse sides of the main base body. Ends of a pair of first and second shafts are associated with the pair of shoulders and first rollers are rotatably associated with the shafts. Second rollers are associated on the pair of first and second shafts and are supported in a loaded condition by at least one pair of first supporting elements, activatable when a load passes. A third shaft, with which third rollers are associated rotatably, is further provided that is supported by at least one pair of second supporting elements, the ends of the third shaft being free.

Abstract: A link of a conveyor chain, connectable to similar links comprising a main base body with two shoulders, which protrude upward from the ends of the transverse sides of the main base body and are parallel to the direction of advancement of the chain. Ends of a pair of first and second shafts are associated with the pair of shoulders, first rollers being rotatably associated with the shafts. Second rollers are associated on the pair of first and second shafts, have a smaller diameter than the first rollers, and are supported in a loading condition by first supporting elements, activatable under load and protruding from the main base body. The link further comprises a slider, supported by at least one pair of second supporting elements, protruding from the main base body and has free ends supported on the base body.

Abstract: A bracket for use in a modular belt conveyor, the bracket comprises a modular portion having a first bracket opening, a support portion having a second bracket opening, and an offset portion that joins the modular portion and support portion such that the support portion is offset from the modular portion. A pair of spaced apart brackets is installed in a row of modules, and a load member is positioned in the holder openings to make a low cost flight for a modular belt conveyor. A modular link-pair having first and second link ends extending in opposite directions from an intermediate section. The second link end has a holder that has a holder opening, and a pair of modular link-pairs is installed in a row of modules. A load member is positioned in the spaced apart holder openings to thus make a low cost flight.

Abstract: A conveyor assembly includes a support structure for a belt constructed of interlocking segments. The support structure includes straight segments that may be cut to any desired length. These straight segments are joined using a friction-fit connector. The connector does not require any drilling or other modifications to the straight segments. The straight segments may be constructed from a single sheet of stainless steel. The conveyor assembly may also include support arms, legs and other accessories.

Abstract: A conveying machine includes two opposed supporting frames, several locating members spaced apart along the supporting frames, and several conveying rollers supported on the locating members at two ends; the locating members can be relocated to adjust the distance between the conveying rollers according to the dimensions of articles to be conveyed with the conveying machine; when the conveying machine is used to convey big articles, the user is allowed to increase the distance between the conveying rollers, thus reducing the number of conveying rollers in use and power consumption.

Abstract: The operation mechanism for electric apparatus is provided. An operation mechanism includes a switch element mounted on a circuit board, an upper housing formed with an opening and covering the circuit board, and an operation grip that has an operation shaft hanging therefrom and which is rotatably supported by the upper housing. When the operation grip is oscillatingly operated, the operation shaft drives actuators of the switch element.

Abstract: A kinetic energy transferring element applied to a button structure for pressing an electric switch has a curved portion, a first extended portion and a second extended portion, in which the curved portion is bridged between the first extended portion and the second extended portion. The first extended portion is served as a fulcrum of the transferring element, while the second extended portion is a free end to receive foreign application. When the user presses the second extended portion, the curved portion of the kinetic energy transferring element can protrude to touch the electric switch.

Abstract: The invention relates to a device for pyromechanical separation comprising a housing (4) and a conducting rail (2) which is arranged therein and embodied in such a way that it is separable at a separation point (13) by a separating tool (6) which is actuated by a propulsion pyrotechnical charge (12). In order to protect said conducting rail against manipulations and ensure an unequivocal positioning, the conducting rail (2), the propulsion charge (12) and the separating tool (6) are fixed in the housing (4) in an irremovable manner by a latch (5) which is inserted into the housing (4) and are nondetachably fixed thereto. Said latch (5) is also used as a support for the separating tool (6), i.e. it comprises a cutting edge (7) along which said separating tool (7) cuts.

Abstract: A mechanism is provided for actuating a switch that transmits motion from a first component, which moves along a first path, to a system that is attached to the mechanism. The mechanism includes a second component that moves transverse to the first path and a third component having a switch actuating portion, wherein movement of the first component causes the third component to actuate the switch using motion that is generally along the first path.

Abstract: A waterproof structure with a simple structure and a good assemble workability is provided. A recess portion is formed on a side of an inner casing, and a through hole is formed at the bottom of the recess portion. The through hole runs to a housing recess portion, and a dome switch opposes to the through hole in the inner casing. A protrusion of a cup member is inserted into the through hole from the outside of the inner casing. A protrusive portion protruding from the bottom surface of a push button is inserted into the opening of the cup member. A rubber sheet which couples the push button is sandwiched between the inner casing and a top cover and a back cover.

Abstract: A keypad is provided for a computing device. The keypad includes one or more lighting devices or mechanisms for illuminating a plurality of keys structures. In an embodiment, the plurality of key structures are formed from a milky material.

Abstract: A miniature circuit breaker is disclosed with a latch for continuously opening and closing a contact point with a contact lever on which the moving contact member is molded. A toggle lever gear with a link connected to a switching handle and a coupling element are provided, the coupling element connecting the link with the contact lever, which toggle lever gear can be brought from a first stable position (switched-on position) into a second stable position via a dead-center position by a tripping mechanism. The contact lever can be rotated and the contact point can be permanently opened. A compression spring is provided which acts on the link, the force of which acts approximately in a direction of the longitudinal extent of the link in the switched-off position, and thus at the beginning of the switching-on process, and transversely thereto in the switched-on position.

Abstract: The present invention provides more efficient, cost effective coke drum isolation valve devices and system as well as more efficient, cost effective methods for isolating the flow of matter from location to another in the delayed coker unit operation where the valve comprises a first seat; a second seat aligned with said first seat; a blind; a main body having an orifice dimensioned to align with an orifice in said line; wherein said main body is coupled to said line; an upper and lower bonnet coupled to said main body, wherein said bonnets may be removed in order to replace valve parts without separating the main body from the line; and a plate located inside a bonnet, wherein the plate comprises a planar surface that contacts a surface of the blind.