131 results about "Closed path" patented technology

The invention relates to the technical field of rock monitoring, in particular to a safety monitoring method and system for a rock slope, which is characterized in that an abnormal focusing area is generated through gradient change and density sudden change judgment, a basic entrance for early risk identification is constructed, the positioning accuracy of a crack sensitive section is enhanced, and the safety of the crack sensitive section is improved. The identification precision and the dynamic intervention capability of the potential risk area of the rock slope are enhanced, the linear features of the boundary response are extracted through the convolutional neural network, the identification and the reconstruction of the crack main extension path are realized, and the method combines the direction sorting and the structure continuity analysis to improve the reliability of the crack main extension path. Closed fitting and stable connection node labeling of a crack path are completed, a traceable structural framework is provided for subsequent trend analysis, dynamic modeling of crack migration evolution is achieved through comparison recognition of a displacement direction and an angle abrupt change point, a closed path grid can be constructed in a crack direction reversal area, and the dynamic modeling of crack migration evolution is achieved. And the dynamic response layout of the crack control structure is realized.

The invention discloses an automatic calibration method and device for a chip testing machine, and relates to the technical field of chip testing, and the method comprises the steps: forming a four-end-pair closed path through two channels, building a symmetric reciprocal calibration ring, carrying out the zero check, and generating a loop health vector; based on the loop health vector, bidirectional four-quadrant sequencing is performed on the first channel and the second channel, and independent errors of a source chain and a measurement chain are separated to form a channel error map; according to the channel error atlas, slope standard deviation piecewise linearization processing is executed on each measuring range and each frequency point, a middle linear region and nonlinear regions at the two ends are determined, and a sectional calibration table is generated. According to the method, bidirectional four-quadrant sequencing is executed under a healthy loop, and source chain and measurement chain errors are separated, so that an independent error map of each channel is obtained, and error term aliasing in traditional calibration is avoided.

A grating waveguide device that reduces rainbow artifacts, and a waveguide system. The grating waveguide device comprises a waveguide substrate (2) and a grating structure. The grating structure comprises a first in-coupling grating (3-1) and a first out-coupling grating (4-1), a grating region of the first out-coupling grating (4-1) having a grating line overlapping structure of multiple dimensions; alternatively, the grating structure comprises a second in-coupling grating (3-2), a fold grating (5) and a second out-coupling grating (4-2), a grating line region of the fold grating (5) and a grating line region of the second out-coupling grating (4-2) having an overlapping region. Grating vectors of the grating structure form one and only one closed path in a k-space. When a projected image of an imaging device enters an eye box via the grating structure of the waveguide substrate (2) as a projected light beam, an image displayed by the grating waveguide device is distortion-free and aberration-free compared with the projected image of the imaging device, and diffracted light generated by the diffraction of ambient light via the grating structure does not enter the eye box, such that human eyes cannot observe the rainbow artifact phenomenon in the eye box.

The invention relates to a low-voltage distribution line comprehensive intelligent protection method based on multi-parameter linkage, and the method comprises the following steps: collecting power distribution abnormal data, calculating a trigger interval, screening segments in a period, generating a sequential segment group, analyzing a serial number difference value to form a continuous path, recognizing rhythm abnormality, and eliminating interference flow. And a time fault is checked to construct a closed chain table, a rhythm stable closed loop structure is screened, and an intelligent protection result is output. According to the method, continuous fragments are constructed based on trigger rhythms and event numbers in abnormal data processing, path continuity is judged through difference values, effective flow directions are recognized, disturbance fragments are eliminated in combination with rhythm comparison, stable closed paths are constructed, and sequences with consistent rhythms and continuous numbers are screened to serve as a judgment basis. Accurate description of an abnormal propagation path and effective tracking of a response rhythm are realized, and identification sensitivity and protection strategy adaptability of a distribution line under multi-source interference are enhanced.

The invention provides a mechanical automatic material grabbing device and method, and the method comprises the steps: screening out a plurality of finger tip adjustment parameters of a manipulator end effector through a grabbing space of a target material, and converting all the finger tip adjustment parameters into compliance control parameters of the manipulator end effector in a closing process; based on the contact signal, determining a trend vector when the target material slides relative to the finger tip surface of the end effector of the manipulator, and determining the stability of the end effector of the manipulator in the sliding state of the target material according to the trend vector; dynamically predicting the closed path of the grabbing process through the compliance control parameters and the stability to obtain the grabbing stability deviation of the manipulator end effector; and when the grabbing stability deviation is larger than a preset stability threshold value, the closing speed and the contact pressure of all the finger tips of the mechanical arm are adjusted. By the adoption of the scheme, self-adaptive compliant control of the manipulator based on local features can be achieved in a complex grabbing environment, so that stable carrying of materials in the mechanical automatic grabbing process is guaranteed.

The invention relates to a quasi-differential wavefront segmentation double-beam interference device with a planar light path structural design, which has the structural characteristic of a non-closed optical path for transmitting a measurement light beam in a one-way manner. Space coherent light of a transverse mode vector filtering mechanism based on the Huygens principle / phased array principle instead of homologous transmission time coherent light is used as each light source, and a non-closed optical path is realized under the cooperation of a one-way transmission mode on a divided measuring light beam. The problem that the sum of the loop wavelength increment or the frequency increment of a closed path interference device is zero is solved, so that the purpose of measuring the first-level effect of anisotropic physical parameters of a measured object in a linear system is achieved, and the device is particularly suitable for immersion type online measurement. The optical elements have stable performance and sound self-adaptive mechanism and self-diagnosis capability through careful layout of the optical elements; and the method also has wide application prospects in basic physical research and novel navigation / positioning systems. The invention also provides a differential wavefront segmentation and semi-transparent and semi-reflective mirror beam combination interferometer device based on the planar light path structure design, and a wavefront segmentation interferometer device based on the planar light path structure design and provided with a pre-crossing area and a bending type one-way-two-way-common mode combination light path structure. The invention relates to a wavefront segmentation interferometer device of a one-way-two-way combined light path structure which is designed based on a planar light path structure and adopts polarization light splitting-beam combination, optical rotation processing of a reference light beam and original path returning, and a use method of an interference device.

A construction task dispatching method and system based on drawing information recognition. The method comprises: acquiring a drawing to be recognized; recognizing a plurality of closed paths in the drawing; on the basis of positional relationships among the plurality of closed paths, determining a drawing frame of the drawing; on the basis of the drawing frame of the drawing and a title block range of the drawing, determining title block information; on the basis of the title block information, determining a recognition result of a target object in the drawing; and on the basis of the recognition result of the target object, performing construction task dispatching.

A cooling device (5) for a forklift truck (1) is shown and described, wherein the cooling device (5) defines a closed cavity extending along a closed path and along which a cooling medium can be moved, and wherein the cooling device (5) includes a counterweight (3) of the forklift truck (1), the counterweight (3) defining a cavity section of the closed cavity. Furthermore, a counterweight (3) for a cooling device (5), a method for manufacturing a counterweight (3), and a forklift truck (1) are shown and described.

The invention relates to a filling method and a filling line wherein a plurality of filling units, each one being suitable to contain the volume of fluid necessary to fill a respective container C, are recirculated in the filling line along a closed path P2, along a portion of which they are temporarily integral with respective containers C and fill them autonomously at a buffer station, in a longer time than that necessary for filling the same volume of fluid into said filling units which, therefore, can be filled at the normal production speed of the line at a filling station separate from the buffer station. Downstream of the buffer station, the emptied filling units are separated from the respective filled container C and are filled with a new volume of fluid, in order to autonomously transfer it to another, respective container C at the buffer station.

There is provided a baby carrier comprising: a waistband capable of being stably secured to a user's waist, defining, in use, a closed path formed along a trajectory located on a transverse plane, and comprising a shoulder strap defining a surface formed perpendicular to the transverse plane along the trajectory; a support device comprising at least one rigid panel formed along a support plane; and a fastening device that fastens the waistband and the support device to each other in such a way that the panel can rotate relative to the shoulder strap about an axis of rotation formed along a portion of the trajectory defining at least a stable closed configuration in which the panel is in contact with the shoulder strap, and a stable maximally open configuration in which the panel is in contact with the shoulder strap. The panel has a stable, maximally open configuration in which the planes are substantially parallel to each other and / or the panel is closer to the shoulder strap, and a stable, maximally open configuration in which the planes are perpendicular to each other and the panel is farther from the shoulder strap, thereby defining a maximum angle of rotation between the planes about the axis of rotation.

Certain aspects of the disclosure provide a modular conduit assembly, comprising: a plurality of straight conduit segments; one or more corner conduit segments, each comprising a bend of a predetermined angle; and a plurality of joint connectors configured to interconnect the straight conduit segments and the one or more corner conduit segments to form an enclosed pathway for routing one or more cables or wires.

The invention relates to cleaning equipment, in particular to aluminum material welding end cleaning equipment. The aluminum material welding end cleaning equipment comprises a conveying device, a cleaning device, a lifting device and a control device, a plurality of fixing clamps used for containing products are arranged on the conveying device, the conveying device is used for enabling the fixing clamps to circularly move along a closed path, the products are provided with ends, the cleaning device comprises a cleaning tank, and the lifting device is used for lifting the cleaning tank. The lifting device is used for enabling the cleaning tank and the fixing clamp to move relatively in the height direction of the aluminum material welding end cleaning equipment so that the end can enter or exit from the cleaning tank, and the control device is used for controlling starting and stopping of the lifting device and the conveying device. Only the end of the product enters the cleaning tank to be cleaned, and the cleaning tank can be very small, so that the use amount of medicaments and clean water can be remarkably reduced.

The invention discloses a mahjong machine tile storage assembly and a mahjong machine, the tile storage assembly comprises a tile storage base, a closed or non-closed path is formed on the tile storage base, and a bottom support is arranged on the path; a card inlet and a card outlet which are located in different positions of the path are further formed in the card storage base, the bottom support located between the card inlet and the card outlet is used for storing cards, and the bottom support is driven by the driving unit to move between the card inlet and the card outlet along the path. A path extends out of the tile storage channel, when the bottom support moves along the path, the moving bottom support can take away tile piers one by one, the tile piers are prevented from being stacked at the tile inlet, and the tile pushing pressure of an upstream stacking and pushing assembly is relieved; the tile piers and the bottom support are basically in a relatively static state, so that the movement of the bottom support is not influenced no matter the mahjong tiles are clean or stained, and resistance is not additionally increased; during mahjong tile feeding, the moving bottom support can apply thrust to the mahjong tile queue from the bottom, and mahjong tile feeding resistance of the mahjong tile feeding assembly can be reduced.

The utility model relates to door and window edge protection technology field provides a kind of rubber buffer layer anti-collision door and window edge protection, including edge protection, the edge protection one side is equipped with the embedded groove, the edge protection one side is equipped with magnetic attraction switching component;The magnetic attraction switching component includes the recess that is equipped in the embedded groove one side, the recess is bonded with first magnetic attraction piece;The magnetic attraction switching component further includes the guide groove that is equipped in the edge protection one side, the guide groove inner wall is bonded with guide gasket, the guide gasket inner wall smooth transition, the beneficial effects of the utility model are: when door and window are closed, the progressive guidance of guide block and guide groove,guide gasket makes second magnetic attraction piece and third magnetic attraction piece adsorb, and the edge protection is transferred to the fixed side of window frame, so that the edge protection is separated from the closed path of door and window corner, avoid entering the closed gap of door and window fan and window frame, solve the problem of jam or unable to close caused by occupying closed space due to complete cladding structure.

The utility model discloses an adsorbent transfer-free continuous water treatment device which comprises a rack, and at least one adsorbent loading structure for loading an adsorbent is movably arranged on the rack. The adsorbent loading structure moves on a closed path for water treatment with the adsorbent therein and returns to the starting point together with the adsorbent after water treatment is completed. According to the utility model, the adsorbent is fixedly loaded in the adsorbent loading mechanism, and the adsorbent loading mechanism runs on the closed route, so that the adsorbent loading mechanism not only can drive the adsorbent to move for water treatment, but also can convey the adsorbent back to the starting point of the closed route after a set of water treatment process is completed by the adsorbent; the system can be immediately put into the next round of water treatment flow; in the process, the adsorbent is always kept in the adsorbent loading mechanism and does not need to be transferred, so that zero loss of the adsorbent can be realized.

The invention discloses aerospace seamless corrugated pipe forming equipment. The aerospace seamless corrugated pipe forming equipment comprises a shell and a plurality of groups of forming modules, the shell is provided with a feeding port and a discharging port. The forming die set comprises a first half die and a second half die. A driving mechanism is arranged in the shell, and the first half mold and the second half mold of any group of forming modules are detachably and fixedly mounted on the driving mechanism through connecting assemblies respectively; the driving mechanism drives the plurality of first half dies to circularly move clockwise on one closed path and drives the plurality of second half dies to circularly move anticlockwise on the other closed path, so that the plurality of first half dies and the plurality of second half dies are simultaneously closed between the two closed paths to form an extrusion channel; a polishing assembly in transmission connection with the driving mechanism is fixedly arranged on the outer side of the discharging opening. The forming equipment is good in forming effect, the mold is fast and convenient to replace, and the production efficiency is improved.

A fluid valve has: a housing (10) which has an inner circumferential surface (11) with inlets (12); a valve slide (20) which can be rotated about an axis of rotation into different rotational positions and has an outer casing surface (21) which faces the inner circumferential surface and which has a passage arrangement with at least one passage (23); and a seal which includes an elastic support cylinder; and a net-like sealing element which is connected thereto and has multiple nodes and edges connecting said nodes and is arranged between the inner circumferential surface (11) and the outer casing surface (21), wherein, in at least one first rotational position, at least two first inlets of the inlets are connected via the passage arrangement; in at least one second rotational position, at least two of said at least two first inlets are separated from one another by means of the valve slide; and in at least one of said two rotational positions, at least one of said first inlets is surrounded by a mesh formed by a closed path of nodes and edges. The invention also relates to a method for producing the fluid valve and a motor vehicle comprising the fluid valve.

The invention provides a TMR sensor based on an annular free layer. Belongs to the technical field of sensors, and comprises a reference layer, a barrier layer and an annular free layer, and by constructing a topologically constrained annular magnetic domain structure, controllable deflection of the magnetic moment of the free layer under the action of an external magnetic field and accurate relative orientation with the reference layer are realized, so that the linear response performance of a magnetic tunnel junction (MTJ) is improved. The effective anisotropic field is reduced by adjusting geometric parameters (such as width-to-thickness ratio and internal and external diameter ratio) of the annular free layer, and the expansion of a linear response interval is realized; meanwhile, the annular structure forms a magnetization closed path, so that demagnetization factors and stray fields are effectively reduced, and the sensitivity and the anti-interference capability are improved. The sensor is prepared by combining magnetron sputtering with a micro-nano patterning process, and magnetic anisotropy is enhanced through magnetic annealing treatment. The sensor is simple in structure, excellent in performance and suitable for high-precision magnetic field detection scenes.

The invention relates to the technical field of analogue simulation, in particular to a natural caving method rock mass spatio-temporal evolution simulation method, which comprises the following steps of: extracting a joint surface trend and an intersection point, screening a closed path line, analyzing a deformation rate difference direction, comparing a slippage direction and a contact direction to extract a dominant node, and judging that an intersection area forms an extension boundary. And integrating the slip line segment time sequence to generate a natural caving method rock mass spatio-temporal evolution result. According to the method, a closed path line is constructed through a joint surface trend and an intersection relationship, the complete expression of a structure configuration is enhanced, a continuous change area is identified in combination with the time continuity of a deformation rate difference direction, the dynamic tracking capability of a deformation trend is improved, and a dominant node group is extracted based on a slip and contact direction difference; and recombining and extending the boundary by using path intersection distribution, and integrating the time sequence and the displacement direction of the slippage line segment to construct a trajectory chain, thereby realizing fine reconstruction of the structure configuration, accurate capture of trend change and continuous expression of an evolution trajectory.

The invention relates to a gap topology error repairing method and device for an automobile body model, and the method comprises the steps: analyzing a topological structure of a to-be-repaired body model, so as to obtain a closed path meeting a preset coverage condition in the topological structure; judging whether the topological structure meets a preset error condition or not according to the closed path; if the topological structure meets the preset error condition, a gap of the to-be-repaired automobile body model is positioned based on the distance between the boundary edges, and the gap is sealed and filled in the to-be-repaired automobile body model so as to determine the repaired automobile body model of the automobile. According to the method, the topology problems needing to be repaired can be classified and defined, the gap topology problems can be detected, then the algorithm can be designed to be repaired, the similar problems can be repaired in a batched and targeted mode, the manual workload is relieved, and the working efficiency is improved.

A vacuum cleaner is described comprising a dirt separator and a regenerative drive assembly. The dirt separator comprises a filter assembly for removing dirt from an airflow moving through the vacuum cleaner. The regenerative drive assembly is configured to agitate the filter assembly to dislodge dirt from the filter assembly by moving at least part of the filter assembly repeatedly along a closed path.

A regenerable fuel cell system comprising a combination of a fuel cell and a water electrolyzer (10), consisting of a polymer membrane and electrodes arranged on respective sides of the polymer membrane, wherein the regenerable fuel cell system can be operated to generate electrical energy during an energy generation period by supplying oxygen gas (O2) to an electrode arranged on one side of the polymer membrane and hydrogen gas (H2) to an electrode arranged on the other side of the polymer membrane, and can be operated to generate oxygen gas (O2) and hydrogen gas (H2) during a charging period by electrolyzing water in the combination of fuel cell and water electrolyzer (10), wherein the regenerable fuel cell system comprises: an oxygen container (1) for storing oxygen gas (O2); a hydrogen container (1') for storing hydrogen gas (H2); a first storage unit (2) for storing water and an oxygen gas (O2) that is not used to generate energy from the oxygen gas (O2) supplied during the energy generation period; a second storage unit (2') for storing water and hydrogen gas (H2); which is not used for energy generation from the hydrogen gas (H2) supplied during the energy generation period; and a vapor pressure control device for regulating the vapor pressure of the water in the first and / or second storage tank (2, 2'), wherein the combination of fuel cell and water electrolyzer (10), the oxygen reservoir (1), the hydrogen reservoir (1'), the first storage (2), the second storage (2') and a liquid / gas path connecting them are provided as a closed path, wherein the oxygen reservoir (1) and the first storage (2) are connected to each other so that the oxygen gas (O2) can move back and forth between them, and wherein the oxygen gas (O2) is supplied to the electrode arranged on one side of the polymer membrane during the energy generation period, wherein the hydrogen reservoir (1') and the second storage (2') are connected to each other so that the hydrogen gas (H2) can move back and forth between them, and wherein the hydrogen gas (H2) is supplied to the electrode arranged on the other side of the polymer membrane during the energy generation period, and wherein water required during the energy generation period is supplied to the polymer membrane.by regulating the vapor pressure of the water by the vapor pressure control medium, and wherein the vapor pressure control medium regulates the vapor pressure of the water by changing the temperature of the first storage tank (2) and the second storage tank (2').

A vacuum cleaner (1, fig.1) comprising a secondary dirt separator 400 downstream of a primary dirt separator (210, fig.8), a suction motor (500, fig.8) downstream of the secondary dirt separator, and a post-motor filter downstream of the suction motor, the secondary dirt separator comprising a drive assembly 450 for dislodging dirt and regenerating a filter assembly 405, preferably a hollow semi-elliptical tube located beneath the primary dirt separator, by agitating, moving, wobbling or shaking it, preferably along an elliptical closed path (458, fig.52). Preferably, the primary and secondary dirt separators are within primary and secondary chambers, respectively, within a bin (100, fig.8) having an openable bin base. Airflow may enter the primary chamber in a direction parallel to a central axis (185, fig.10) and a rotational axis (R, fig.57) of the suction motor. The drive assembly may comprise an electric motor (451, fig.50) and a drive shaft (446, fig.48) with an eccentric mass (455, fig.48). Figure 36

This application belongs to the field of geological logging technology, specifically disclosing an automated logging device, including a circulating transport mechanism, a feeding mechanism, a vibration mechanism, a drilling fluid recovery mechanism, a cuttings cleaning mechanism, an imaging analysis mechanism, a drying and storage mechanism, and a screen cleaning mechanism. The circulating transport mechanism includes multiple screens arranged in sequence, which circulate along a closed path to perform the following operations: the feeding mechanism injects material into the screens; the drilling fluid recovery mechanism recovers drilling fluid from the material in the screens; the cuttings cleaning mechanism cleans the material in the screens to leave clean cuttings; the imaging analysis mechanism performs imaging analysis on the clean cuttings in the screens; the drying and storage mechanism receives, dries, and stores the clean cuttings in the screens; and the screen cleaning mechanism cleans the screens. The vibration mechanism applies a vibration force to the screens at the drilling fluid recovery mechanism and the cuttings cleaning mechanism. The automated logging device of this application can continuously process drilling materials in batches.

A vacuum cleaner (1, fig.1) comprising a dirt separator 400 with a filter assembly 405 and a drive assembly 450 for dislodging dirt and regenerating a filter 410 of the filter assembly by agitating, moving, wobbling or shaking a bridge 440 wrapped around the filter. Preferably, the bridge and the filter are moved repeatedly along a closed path (458, fig.52), which is preferably elliptical and eccentric. Preferably, the filter assembly includes a rear end (417, fig.38) suspended within a housing (241, fig.30) to which an opposite front end (416, fig.38) is mounted. Preferably, the filter 410 is a hollow semi-elliptical tube with pleats (419, fig.39) extending parallel to a filter axis (411, fig.37) and a rotational axis (R, fig.57) of a suction motor (500, fig.8). The drive assembly may comprise an electric motor (451, fig.50) coupled to the filter via a drive shaft (446, fig.48) with an eccentric mass (455, fig.48), wherein the drive shaft is received within a hub (444, fig.47) of the bridge. A primary dirt separator (210, fig.8) may be located upstream of the dirt separator within a bin (100, fig.8). Figure 36

A reservoir comprises: at least one feed station equipped with a feed transfer device and associated or associable with at least one respective feed line for feeding articles; at least one pickup station equipped with a pickup transfer device and associated or associable with at least one respective removal line for removing articles; a movable support provided with a plurality of receiving seats for receiving articles and configured to move the receiving seats along a closed path passing through the feed station and the pickup station so that the articles are fed to the movable support by the feed transfer device and the articles are removed from the movable support by the pickup transfer device. The movable support comprises a plurality of sectors, each defining a plurality of receiving seats and movable independently of each other along the closed path.

An apparatus includes a plurality of nodes coupled to an optical network, each node including an optical transmitter interface configured to transmit an optical signal at a location along a coupled optical path of the optical network, and an optical receiver interface configured to receive an optical signal at a location along the coupled optical path of the optical network. The apparatus includes a first optical path of the optical network configured to propagate a guided mode around a closed path; and a second optical path of the optical network configured to propagate a guided mode around a closed path.

A vacuum cleaner (1, fig.1) comprising a secondary dirt separator 400 downstream of a primary dirt separator (210, fig.8), a suction motor (500, fig.8) downstream of the secondary dirt separator, the secondary dirt separator comprising a drive assembly 450 for dislodging dirt and regenerating a filter assembly 405, preferably a hollow semi-elliptical tube located beneath the primary dirt separator, by agitating, moving, wobbling or shaking it, preferably along an elliptical closed path (458, fig.52), wherein the primary dirt separator is within a primary chamber that airflow enters in a direction parallel to a central axis (185, fig.10) and a rotational axis (R, fig.57) of the suction motor. Preferably, the secondary dirt separator is within a secondary chamber located, along with the primary chamber, within a bin (100, fig.8) having an openable bin base. The drive assembly may comprise an electric motor (451, fig.50) and a drive shaft (446, fig.48) with an eccentric mass (455, fig.48). Figure 36

A vacuum cleaner (1, fig.1) comprising a dirt separator 400 with a filter assembly 405 and a drive assembly 450 for dislodging dirt and regenerating a filter 410 of the filter assembly by agitating, moving, wobbling or shaking it, wherein the drive assembly is activated by a controller. The drive assembly may comprise an electric motor (451, fig.50) coupled to the filter via a drive shaft (446, fig.48) with an eccentric mass (455, fig.48). The controller, which may be a microcontroller unit or a processing unit, may adjust the duration, speed, interval and / or frequency of the drive based on detection of opening of a bin base and / or dust load of the filter (i.e., blocking or blinding of the filter). Preferably, a bridge 440 and the filter are moved repeatedly along a closed path (458, fig.52), which is elliptical and eccentric. A primary dirt separator (210, fig.8) may be located upstream of the dirt separator within a bin (100, fig.8). Figure 36

A vacuum cleaner comprising: a suction motor; a dirt separator with a filter with pleats and an agitator; a bin 174 enclosing primary and secondary separators with an open end and a door 128 on another end; where the door can pivot to be perpendicular to the pleats or parallel to the pleats. Ideally the vacuum cleaner is hand held with a pistol grip inclined at 10-20 degrees from the separator axis; the filter is pleated paper surrounding a U shaped interior; the filter is the same length as the primary separator; there is a agitator moving in a closed path around the filter to dislodge dirt and regenerate it when the suction motor is off; the filter is cantilevered, only supported at one end; there is a looming conduit between the separators to contain wiring. Fig 16