Abstract: A filling nozzle which is releasably secured to a container through which liquid can be dispensed from the container into another receptacle when the nozzle is directed downwardly in a liquid dispensing position. The nozzle contains a butterfly valve for automatically shutting off the flow of liquid from the container to the receptacle when the receptacle is substantially filled.

Abstract: A tree harvester comprises a head boom at the lower free end of which is mounted a tree felling head having a cylindrical cutting knife behind which is formed a storage area for felled trees. The head includes pivotable gripping arms for pressing the trees to be felled against the cylindrical knife and for driving them and holding them in the storage area.

Abstract: An off-the-highway vehicle tire employing long and short lugs alternately disposed about the periphery in a substantially symmetric manner whereby lugs from each side of the tire strike the ground substantially simultaneously thereby minimizing side forces.

Abstract: Automatic control device for the slats of a venetian blind which responds to ambient radiation and which includes at least one reversible electric motor connected to rotate the slats between open and closed conditions, a sensing device indicating the level of ambient radiation of light and/or heat, two switches connected to the motor to determine its direction of rotation, an electrical control circuit responding to the sensing device to operate either one of the two switches, and limit switches to halt the motor in predetermined condition of the slats.

Abstract: A counterweight (12) provided at the end of a shaft (8) for winding up the door-raising belts (3) of a concertina type door. The counterweight (12) is designed to open the door to a fraction of its height. It co-operates with the motor (7) when the door is being opened and closed under normal circumstances. A motor and brake unit (14) is provided including both the motor (7) and a brake for locking the shaft (8) when the motor is not in operation. Catch means may also be provided on the bottom of the door. Manual means are provided for releasing the shaft-locking brake means in the event of a power failure. The device is essentially a safety device and in the event of a motor breakdown or a power failure it enables the concertina-type door to be rapidly opened, at least partially. Similarly, in the event of the coupling between the drive shaft and the motor being broken, the device prevents the door from falling to its closed position in a catastrophic manner.

Abstract: A windshield sunshade for placement behind the windshield of an automobile, truck, boat or other vehicle that blocks and reflects hot radiation from the sun that otherwise greatly overheats a vehicle interior during hot sunny days. The sunshade is made up of connected and hinged planar parallelograms each having spaced parallel side edges but with the vertically extended edges at an angle relative to the generally horizontal upper and lower edges other than perpendicular. Other than at overall sunshade outer side edges and top and bottom edges the parallelograms are joined in horizontal tiers and side by side in vertical columns. There is a top center cut out to accomodate rear view mirror structure with part of the windshield sunshade still positionable to extend between the back of the rear view mirror and the windshield.

Abstract: Lower end portions of the life cords of a Venetian blink assembly are retained within the bottom rail of the assembly by a helical tension spring that is normally in an unexpanded or unloaded condition when the bottom rail is moved toward or away from the top rail by manipulating the lift cords. When the bottom rail is held in fixed position relative to the top rail, the lower end portions of the lift cords can be pulled from within the bottom rail to expand the spring so as to apply a user controllable tensioning force on the lift cords which are then locked in position. The now tensioned lift cords serve to maintain and stabilize the position of the ladder and slat structure of the blind assembly where it is mounted in a moving vehicle, for example, or where it is inclined from a vertical plane.

Abstract: A mold and method for producing, or casting a high-melting metal article from a high-melting metal having a melting point of about 900.degree. to 1600.degree. C.

Abstract: A casting process which is disclosed herein comprises placing a breakable core into a cavity in a mold and pouring a molten metal under a pressure into the cavity by means of a plunger. The casting process is characterized in that the speed of plunger moved is controlled at three stages of first, second and third velocities, the second velocity being set higher than the first velocity and the third velocity being lower than the second velocity.

Abstract: A mold oscillator for a continuous casting machine in which a mold is mounted for vertical reciprocation on a mold table frame, the machine having an enclosed spray chamber beneath the mold for spray cooling of a continuous casting therein as it emerges from the mold, in which an oscillator cam connected to a drive motor is connected through a yoke to first and second vertical shafts fixed to the mold table frame at their upper ends, and are seated within and vertically oscillatable within tubular guide means and ball bushings therein, which control the alignment of the shafts, thus reducing horizontal vibration and strand misalignment.

Abstract: An endless track continuous casting machine having a pair of upper and lower endless belts facing each other in a spaced apart relationship and travelling in a downwardly slanted direction which form the long side walls of a mold. Dam blocks continuously and closely disposed and pinched between both side edges of the pair of endless belts and each supported by a link forming part of an endless chain wound around sprockets disposed on each side of the pair of endless belts form the short side walls of the mold. The dam blocks are mounted on each of the links of the endless chain to be movable inwardly and outwardly, and they are guided by a guiding mechanism to a projecting position when entering the advancing path of the mold and are guided to a set back position when entering the returning route. This guiding mechanism is adjustable to change the projected position of each dam block while the endless chain is moving, thus enabling the width of a cast piece to be altered without stopping the casting work.

Abstract: A width changing method in which the width of a slab under casting is changed by a movement of narrow face of a continuous casting mold by the operation of a horizontal driving device and a rotary driving device operable independently of the horizontal driving device. The period of width changing operation is divided into a forward taper changing period in which each narrow face is inclined toward the center of the mold and a rearward taper changing period in which each mold wall is inlcined away from the center of the mold. The acceleration of the horizontal movement of each narrow face is determined by means of allowable shell deformation resistance as a parameter for each period. Also is determined the angular velocity of the rotary device or the difference in velocity between the upper and lower ends of the narrow face. The width changing operation is conducted while maintaining the acceleration and the angular velocity or the velocity difference at constant levels in respective periods.

Abstract: A dual drive sheet casting machine for casting metal sheet has a pair of water cooled rolls between which the metal is cast. Each roll of the casting machine is driven by a separate motor, with one motor being a master and the other a slave driven at a controlled percentage of the speed or current of the master motor. Differential current to the two motors indicates sticking or microsticking of metal to the rolls. When the magnitude of the differential current exceeds a high limit indicating sticking, the master roll is slowed to eliminate the sticking. When the magnitude of differential current passed by a band pass filter between one half and ten Hertz exceeds a selected maximum indicating microsticking, the rotational speed of the master roll is decreased. After making a change in roll speed, the control circuit is disabled for an interval to permit the casting machine to regain stability.

Abstract: Tantalum or niobium in the form of powder or pieces containing volatile impurities, e.g. sodiothermic tantalum powder, is first converted into crude cast metal by plasma melting and then the crude cast metal is refined by electron beam melting.

Abstract: An apparatus and method for automatically forming ceramic shell molds as part of an investment casting process. The apparatus includes structure defining a plurality of processing stations which together define a process line through which set ups are conveyed and coated with cermic material. The first station includes a pickup arm assembly operative to transfer a set up from a transfer cart to a slurry tank where it is released. A transfer arm forming part of a second station engages the set up rotates it within the slurry tank for a predetermined time, after which, the slurry transfer arm transfers it to a spin-off tank and releases it. A stucco transfer arm assembly forming part of a third station engages the set up and rotates it to spin-off excess slurry solution after which the stucco transfer arm transfers it to a stucco tank and releases it.

Abstract: An energy storage and conversion system utilizes unique heat exchange media for storing and transferring heat. In one embodiment, a refractory material is heated to the molten state by a solar furnace. The refractory material is stored in its molten form and metered to a direct-contact heat exchanger. It is fed into the heat exchanger in a plurality of streams that break into a plurality of droplets. The droplets flow through the heat exchanger in countercurrent relationship with a relatively inert gas such as argon or nitrogen. The gas is heated and expanded through an expansion engine to convert the thermal energy to mechanical energy which in turn can be utilized to produce electricity, for example. The refractory can be sufficiently cooled in the heat exchanger to fuse into beads, which can be easily recycled to the solar furnace.

Abstract: Apparatus for exchanging contaminated room air with fresh outdoor air and a method for operating same is disclosed. The apparatus includes a housing having a pair of substantially parallel air passageways sealed from one another and providing fluid communication between the room and the outdoors. A heat recovery rotor is disposed in the air passageways in an inclined orientation.

Abstract: An expandable heat rejection system for radiating heat generated by a source of heat on a spacecraft or like vehicle is described and comprises a fluid heat exchange medium in operative heat exchange contact with the source for absorbing heat by evaporation of the liquid phase of the medium, a thin flexible wall structure having an inlet and an outlet and defining a volume expandable and collapsible between preselected limits and defining an inner condensation surface and an outer heat radiating surface, a multiplicity of capillary grooves on the condensation surface for promoting condensation of vaporous medium and for facilitating flow of condensate along the condensation surface toward the outlet, and a pump for circulating the medium through the system.

Abstract: A device for cooling hot, compressed, dust-laden gases. The device consists of an inner structure made out of cooled tubes, positioned inside a pressurized container. The device contains several straight partitions made out of tubes. The partitions parallel the longitudinal axis of the inner structure. The object is to redesign the heat-emitting surfaces of the device in order to make it more compact. At least one of the straight partitions is bent out into a nest of tubes. The nest extends through the cross-section of the inner structure. The tubes that the nest is made out of extend through and are supported by the rest of the partitions.

Abstract: A data entry terminal for use in a hostile environment is sealed from the outside environment. The terminal has a housing made up of a front panel, shroud and base plate that are fastened together in two different orientations to facilitate desk top and wall mounting, and electronic equipment is mounted inside the terminal enclosure. A fan circulates air around the inside of the terminal enclosure for cooling the electronic equipment inside. The enclosure base acts as a heat sink to transfer the heat to the outside environment in whatever position the terminal is mounted.

Abstract: An improved heat exchanger is shown for indirect heat exchange between two fluid media. The heat exchanger has thin metallic walls and a multitude of convoluted shaped internal flow passages, increasing the effective contact time during which heat is transferred between the media. The heat exchanger is particularly suitable for heat exchange between fluids having low differential temperatures or specific heats, due to the thin wall structure, the elongated internal flow path created by the convoluted core structure and the absence of welds, soldering, or other thick areas which tend to inhibit heat transfer due to their relatively greater mass. The heat exchanger may be produced by a novel technique. A support matrix is assembled from a plurality of low melting point forms, each of which has angled internal passages. The passages of each form are positioned in register with the passages of adjacent forms.

Abstract: A fluid sampling apparatus is disclosed for withdrawing samples of groundwater or other fluids from a well or other monitoring site. The apparatus preferably includes pump means, conduit means and a wellhead assembly that are substantially permanently installed at such well or monitoring site and are thereby dedicated thereto in order to avoid or minimize cross-contamination of samples from site to site. The apparatus preferably also includes a removable and portable controller means adapted for easy and convenient transportation and connection to such dedicated fluid sampling components at various wells or monitoring sites. A recovery, collection and control system for cleanup of leachate or other liquid material or contaminated groundwater from a landsite is also disclosed.

Abstract: An oil recovery process employing a well pattern having a horizontal well located along each of the four sides of a substantially rectangular well pattern, a vertical injection well located at the center of the well pattern, and four vertical infill wells located midway between the central injection well and the four corners of the rectangular well pattern. Steam is initially injected through the central injection well and production taken at the four infill walls. After the injection of about 0.5 to about 1.0 pore volumes of steam through the central injection well, central injection is converted to water, the infill production wells are converted to steam injection, and production is taken from the horizontal wells.

Abstract: In a continuous or cyclic steam foam drive, recovery of an acidic reservoir oil (1) is improved by injecting steam accompanied by (a) enough dissolved alkaline monovalent salt to ion-exchange multivalent cations from the reservoir rocks and precipitate those ions in compounds which are insoluble in an alkaline aqueous liquid as well as forming soaps of the reservoir oil acids and (b) surfactants for foaming the steam and increasing the salt tolerance of an aqueous surfactant system containing the soaps of the reservoir oil acids, and (2) is further improved by using trona or an equivalent mixture of alkali metal carbonates and bicarbonates as the alkaline monovalent salt.

Abstract: The invention relates to a tool suitable for closing a production column (100) of a well when the tool is located in a connector of enlarged diameter (101). The tool is lowered on the end of a cable (76) and includes a tilting valve member (60) which is oblong in shape and which is oriented longitudinally to pass through the corresponding oblong orifice of a valve seat (69) fixed to the connector, and is then oriented transversely in order to co-operate with said seat in order to close the production column when a traction force (F) is applied to the cable (76).

Abstract: Mine clearing apparatus for attachment to a vehicle and comprising a frame mountable onto a vehicle for selectable positioning in a raised or lowered orientation; apparatus mounted onto the frame for raising and shunting aside mines including a plow section, the plow section defining a plurality of plow teeth which, in operation, extend below the ground surface, and conveyer apparatus extending along the length of the plow section and adapted to convey the contents of the earth raised by the plow section to one side of the vehicle.

Abstract: A reciprocating hand tool arranged to be operated by a rotating power source consisting of a rotatable eccentric, a flexible sleeve, a cable within the sleeve reciprocated by the rotation of the eccentric and a device for attaching a cutting tool to the end of the cable opposite the eccentric. Two alternative cutting tool attaching device are disclosed, one which produces continuous reciprocation for sawing, filing, or sanding, the other which produces intermittent reciprocation in the nature of hammer blows for chisels and the like.

Abstract: In an earth boring bit of the type having a rotatable cone secured to a bearing shaft, an improved pressure compensating and relief system. A flexible diaphragm has an enlarge peripheral portion in an o-ring configuration sealingly secured in a compensator cavity to form a mud region and a lubricant region. A central portion of the diaphragm has a perforated and ridged protrusion extending into the mud region to form a self energizing area, exposed to the mud region, that seals the perforation when the pressure of the lubricant is less than or substantially equal that of the mud. A wall at the end of the compensator cavity surrounds the mud passage and engages an area around the protrusion when the diaphragm is fully extended by lubricant pressure build-up that exceeds the hydrostatic pressure. Thus, the resulting pressure differential opens the perforation, releases lubricant and relieves the build-up of lubricant pressure.

Abstract: A drill bit for drilling into earth formations comprising a plurality of sections having connection means to connect said sections to form a unitary drill bit; means in said plurality of sections for storing and delivering lubricants to the cutting cones; and wear bar segments on said plurality of sections to form continuous wear bars about the periphery of said unitary drill bit thus reducing the wear on said unitary drill bit.

Abstract: A percussion drill apparatus is provided which isolates the surfaces that pound on one another from borehole cuttings, while also sealing in grease, all in a compact assembly. The percussion sub which holds the drill bit and which has an anvil surface which can be repeatedly struck, includes a cylindrical outer surface extending down from the anvil surface. The outer barrel, which has a hammer surface that hammers the anvil surface, carries a cage which surrounds the cylindrical surface, and which holds a seal assembly which seals to the cylindrical surface. Thus, percussion occurs in a sealed area.

Abstract: A cutting element includes a stud having an inclined supporting surface. The supporting surface intersects a side surface of the stud to form an edge. A cutting member is bonded to the supporting surface. A reinforcing shoulder projects from the supporting surface adjacent a rear portion of the cutting member. The shoulder includes a side surface, a portion of which intersects the edge along a region of the edge whose forwardmost point is spaced rearwardly from a rearwardmost point of the cutting member. When the cutting element is positioned within a bore of a drill bit, that region of the edge is completely positioned within the bore so as to be reinforced by the bore wall.

Abstract: A rotary drill bit, for drilling wells in subsurface earth formations, and designed for rotation in a given direction, comprises a bit body having an internal passageway for drilling fluid. The bit body has an operating end face and at least one opening through that face communicating with the passageway. Cutters on the bit body form at least one elongate cutting region extending generally radially along a substantial portion of the operating end face. The cutters have cutting surfaces facing in the forward direction and generally continuous cutting edges at the outer extremity of the cutting surfaces. An elongate fence is carried on the bit body, extending generally parallel to the cutting region and spaced from the cutting region in a leading direction.

Abstract: A combinational weighing system with a plurality of weighing devices employs at least three central processing units such as microprocessors. One keeps monitoring the weight information from the weighing devices and analyzes stability of weight data. Another one controls the charging and discharging of the weighing devices. The third performs combinational computation to select a combination. The system has increased flexibility regarding operation and adjustments, and allows efficient methods of zero-point and span adjustment of weighing devices. Its compact unitized input-output unit allows the user to operate the system interactively.

Abstract: A rearwardly projecting mounting arm is provided for the rear of a lawn or garden tractor and has its forward end secured anchored relatively to the rear drive wheel axle of the tractor. The rear end portion of the mounting arm mounts longitudinal mid-portion of a transverse idle wheel axle therefrom for adjustable positioning of the idle wheel axle longitudinally of the mounting arm and the idle wheel axle includes a pair of opposite end idle wheels journalled therefrom in front-to-rear alignment with drive wheels journalled from the drive axle. The lower peripheral portions of the idle wheels are spaced approximately 1 to 2 inches above the lower peripheral portions of the drive wheels and endless flexible track assemblies are trained about corresponding drive and idle wheels.

Abstract: An all terrain vehicle has two vehicle units and an articulating link which interconnects the vehicle units in tandem. Each vehicle unit has a body and a pair of spaced crawler tracks which are powered for moving the respective vehicle unit. The articulating link has two longitudinally spaced apart pitch hinge assemblies, each of which cooperates with a respective vehicle unit to permit relative rotation therebetween about a horizontal pitch axis without interference between the vehicle units. Pitch swivelling means associated with one particular pitch hinge assembly can force relative rotation about the particular pitch axis between a particular vehicle unit and the link, so that one vehicle unit can be rotated forcibly relative to the other vehicle unit to negotiate marginal terrain. The remaining pitch hinge assembly can be either freely hinged to permit rotation about the remaining pitch axis or alternatively can have a similar pitch swivelling means.

Abstract: An electric power steering system (200) for vehicles including a driving control circuit (76, 100, 108) for feeding, in consideration of an output signal (S.sub.1, S.sub.2) from a steering torque detection mechanism (77) for detecting steering torque (Ts) acting on an input shaft (4), a drive signal (Va) to an electric motor (33) for producing auxiliary torque to be supplied to an output shaft (7). In the steering system, the auxiliary torque to be developed at the electric motor (33) is reduced, under the condition that a steering angle (Th) of the steering wheel has exceeded a predetermined angle (Th.sub.1).

Abstract: A body structure for a motorcycle with a front wheel and a rear wheel, including a body frame assembly having an engine mounted thereon and having vertically swingably joined thereto a front leading arm for supporting the front wheel and a rear trailing arm for supporting the rear wheel. The front leading arm as viewed from the side thereof is curved upwardly in the direction of a steering axis of the front wheel. The body frame assembly is shaped in a concave form having front standing portions and rear standing portions to thereby surround the engine. The engine is a V-type with at least a pair of internal combustion cylinders substantially vertically arranged to be respectively forwardly and rearwardly inclined, and may be secured at a front part thereof to the front standing portions of the body frame assembly and at a rear part thereof to the rear standing portions of the body frame assembly.

Abstract: A body structure for a motorcycle with a front wheel and a rear wheel, including a body frame assembly having an engine mounted thereon and having vertically swingably joined thereto a front leading arm for supporting the front wheel and a rear trailing arm for supporting the rear wheel. The front leading arm as viewed from the side thereof is curved upwardly in the direction of a steering axis of the front wheel. The body frame assembly is shaped in a concave form having front standing portions and rear standing portions to thereby surround the engine. The engine is a V-type with at least a pair of internal combustion cylinders substantially vertically arranged to be respectively forwardly and rearwardly inclined, and may be secured at a front part thereof to the front standing portions of the body frame assembly and at a rear part thereof to the rear standing portions of the body frame assembly.

Abstract: A pair of main frames, which form an essential part of a body frame of a motorcycle, are fixed at the front ends to a head pipe, and extend toward the rear portion of a body at a given increasing interval. Each of the main frames includes therein a partition extending in the longitudinal direction.

Abstract: A pair of planetary gear devices are provided in a power transmitting system. One of the members of one of the planetary gear devices is operatively connected to a front drive shaft and another member of the other planetary gear device is operatively connected to a rear drive shaft. A pair of clutches are provided to separately lock the planetary gear devices.

Abstract: In a motor vehicle having in an engine room a carbon canister for adsorbing a vapor from a fuel tank, there is provided a vapor diffusing device which comprises a front side channel member extending in the engine room from a front portion of the vehicle toward a passenger room of the same, a structure incorporated with a part of the channel member to define an enclosed chamber, a first arrangement for fluidly connecting the interior of the enclosed chamber with a purge air opening of the carbon canister, and a second arrangement for defining a vapor diffusing opening through which the interior of the enclosed chamber is exposed to the interior of the engine room.

Abstract: A method of providing a marine seismic signal comprising the steps of: arranging a plurality of seismic sources into a seismic array having at least two seismic subarrays with each subarray having a plurality of seismic sources, towing the seismic array behind a vessel and operating the plurality of seismic sources such that the seismic array satisfies a predetermined relation which is a function of the operating pressure, gun volume and towing depth of the respective seismic sources in the respective subarrays.

Abstract: A rubber vibration isolator is used as a muffler hanger or muffler mount between a car body and a muffler to hang the latter from the former. The isolator includes a body made of rubber-like elastic material whose damping factor is high, two holes, upper and lower, formed in the center of the body of rubber-like elastic material, and a weight provided between the two holes and supported at opposite sides thereof by rubber-like elastic members. The rubber vibration isolator is advantageous in that coefficients of transfer of vibrations of both high and low frequencies, respectively, are lowered.

Abstract: An automobile mechanic's body support includes a H-shaped mobile frame with an attached upstanding support platform. The support platform includes knee rests and a chest support with appropriate adjustment means being provided for positioning the various rests at selected heights. The chest support is mounted to a curved rod which allows the mechanic to position his body over a vehicle's engine.

Abstract: Assembly equipment for rocket stages or other large structures includes three towers arranged on a circle and being circumscribed by a plurality of platforms; another platform ring is held in different levels on an inside circle, and a spiral structure is coaxially mounted for rotation on a circular track to permit access to every part of the centrally positioned structure to be assembled. An arch shaped bridge may span the top part; multiple equipment may be axially superimposed.

Abstract: A support structure adapted for facilitated assembly. The support structure includes a base portion in the general configuration of a sawhorse having spaced horizontal sideboards secured to angled legs at opposite ends thereof in recesses provided in the upper end portions of the legs. Bolts are provided for securing the sideboards to the legs and maintaining the upper end portions of the legs in locked abutting relationship. The outer edges of the upper end portions of the legs are received in slots on the inner surfaces of the sideboards for further improved rigidity of the support structure. Different upper extensions are provided, with adjustable clamping structure for permitting variable height of horizontal supports carried on the upper end of upright portions thereof. A ladder is removably associated with the support.

Abstract: A portable, foldable tree stand (10) upon which a hunter may be seated. The tree stand has a vertical rigid back support member (11) with means (22) for releasably securing the back support member to a tree trunk (20). A seat (23) is pivotally mounted to the back support member (11) intermediate its length and movable from a vertical to a horizontal position to support a hunter in a seated position. A foldable (50) footrest pivotally depends from the seat (23) with the seat (23) being provided with pivotable bracing means (40) releasably connected to the back support member, and footrest bracing means pivotally connected to the seat (23) and to the footrest (50). Flexible, adjustable web strap means (13,18) are secured to the back support member to encircle a tree trunk (20) and to encircle the torso of a hunter seated in the seat.

Abstract: Movable sensing arrangements are prone to damage, unable to position a load engaging device relative to a load for stacking purposes, and unable to controllably position the sensing arrangement. A movable sensing apparatus having a housing and first and second signaling devices mounted in the housing is provided. A guide rail assembly elevationally movably mounts the housing on a carriage assembly and an actuator controllably elevationally moves the housing along the guide rail assembly. A coupling connects the actuator to the housing and releases the housing from connection with the actuator in response to a force of a preselected magnitude being applied to the housing. Thus, the problems related to damage, stacking, and positioning are reduced. The movable sensing apparatus is particularly suited for use on an automatic guided unmanned vehicle having a lift mast assembly.

Abstract: A friction coupling incorporating wear compensating comprises friction members and a plunger adapted to extend in response to wear of the friction members. The extension of the plunger is controlled by the rotation in a predetermined direction of a rotating member housed in the plunger. On this member are engaged two one-way circumferentially-acting friction members, each consisting of at least two-thirds of a turn of a spring. One of these, connected to the plunger, is adapted to prevent rotation of the rotating member relative to the plunger when the latter moves forward. The other, coupled to a control member such as a lever, is adapted to drive the rotating member in rotation in the previously mentioned predetermined direction when the plunger moves back, if the previous forward movement of the plunger has exceeded a substantially constant set point value.

Abstract: An air disc brake assembly having a shortened end cap and an integral air chamber bracket is provided. The shortened end cap is bolted to an end of the air cylinder which is opposite the end from which the piston extends. An air cylinder support portion is integral with the end cap and extends from the outer surface. This support portion has a plate with a recessed central portion and two end lobes for receiving air cylinder mounting bolts. A supporting web extends between the angular flange and the outer wall of the end cap to support the air cylinder. The end cap has stepped cylindrical surfaces to receive bearings and a fluted plan form.