Abstract:
A fluid pressure control system (10) for at least one clutch (38, 40, 50, 54) has a modulating pressure relief valve (62) to smooth clutch engagement, and a timed pressure control system (70) to reduce fluid pressures in the system to lower adequate levels soon after complete engagement of the selected clutch(es) (38, 42, 50, 54). The system may also provide different fluid pressure levels for the speed range clutches (38, 40) and for the directional clutches (50, 54).
Abstract:
Demolition apparatus (60) which is attached to a movable boom-like member (20) of a machine. The demolition apparatus (60) includes support structure (64) which carries a power plunger (68) and an actuator plunger (80). The plungers (68, 80) are mounted in adjacent relationship and are movable with respect to the support structure (64). A compression spring (76) urges the power plunger (68) in a direction from the support structure (64). The actuator plunger (80) includes a latch device (86) which engages a portion (72) of the power plunger (68). In operation, the support structure (64) is moved toward a surface to be demolished. The actuator member (80) engages the surface and remains fixed as the support structure (64) continues to move toward the surface. Therefore, as this occurs, there is relative movement between the support structure (64) and the actuator plunger (80). A latch (86) carried by the actuator plunger (80) engages a part (72) of the power plunger (68) and retains the position of the power plunger (68) with respect to the actuator plunger (80). Therefore, movement of the support structure (64) toward the surface is opposed by the spring (76), and compression forces of the spring (76) increase as such movement occurs. As the support structure (64) is moved toward the surface, an abutment member (90) carried by the support structure (64) engages the latch (86) and releases the latch (86) from engagement with the power plunger (68). Thus, the power plunger (68) is released for rapid movement by the spring (76), and the power plunger (68) strikes the surface for demolition thereof.
Abstract:
A track shoe deflection limiter (28) is fastened to each outboard edge portion (24, 26) for each track shoe (18) of an endless track assembly (10). Each deflection limiter (28) has a first arm portion (30) and a second arm portion (32). The first arm portion (30) of each limiter (28) overlaps a portion of the adjacent track shoe (18) and is in close proximity to the second arm portion (32) of the limiter (28) which is fastened on the adjacent track shoe (18). When wide track shoes are used on a track-type vehicle, the outer end portions of the shoes are often twisted and deflected, relative to adjacent shoes, by an external force, such as a rock which the track shoe passes over. The shoe deflection is transferred to the track joints, including the track links, bushings, pins, and seals, which results in accelerated wear of these track assembly components. The track shoe deflection limiter (28) of the present invention utilizes contact between adjacent deflection limiters (28) to share externally imposed forces between adjacent track shoes (18), thereby limiting the deflection of individual track shoes (18).
Abstract:
A target member (20) mounted on a stationary object, such as a pallet (15), includes at least three reflector elements (52, 53, 54). An identifiying means (35), such as a high intensity light source (35), and an imaging sensor (40) are carried by another, movable object, such as a forklift truck (30). The reflector elements (52, 53, 54) are so configured as to form images of the identifiying means (35) with said images defining a plane (70) oriented other than normal to a line from the identifying means (35) to that plane (70), the images also defining a circle (82) that does not include the identifying means (35). The target member (20) may be in the form of a vertically oriented planar support member (50) on which are mounted a pair of convex mirrors (52, 54) and a concave mirror (53). The images of the identifying means (35) in the mirrors (52, 53, 54) are detected by an imaging sensor (40), such as a television camera (40), and the directions of each of the images at the camera (40) are used to determine all six degrees of positional information of the sensor (40) with respect to the target member (20). That information may be used to guide the forklift truck (30) into position relative to a pallet (15).
Abstract:
An apparatus (10) increases the accuracy of a signal delivered from a remote analog sensor (22) to an analog to digital converter (58). The output of the sensor (22) is derived from a ratio between the power applied and the sensed parameter; thus, any changes to the power applied affects the accuracy of the sensor (22) output. It is, therefore, advantageous to closely control the voltage applied to the sensor (22). The apparatus (10) monitors the voltage drop across the lead lines (12, 14) which extend between the sensor (22) and a power supply and increases the voltage applied to the sensor (22) by a magnitude corresponding to the lead line voltage drop. The accuracy of the sensor (22) is preserved independent of the lead line (12, 14) length and resistance.
Abstract:
Among the variety of bucket arrangements that are commonly available, several are specifically designed for ripping applications in materials that are extremely hard to penetrate. While these types of buckets are normally satisfactory in ripping hard, strong, brittle materials, their designs do not lend themselves to excavating and dumping weaker more plastic materials and thus exhibit little or no versatility. The bucket arrangement (10) of the subject invention includes a first and second ground penetrating means (40, 48) that are selectively positioned on the bucket (10) with respect to each other. The selective positioning allows sole engagement of either of the first or second ground penetrating means (40, 48) with the ground or simultaneous engagement of both penetrating means (40, 48) with the ground. Such an arrangement provides superior operation in a ripping capacity and yet the selective positioning of the first and second penetrating means (40, 48) also permits excellent operation in weaker or plastic materials.
Abstract:
An injector system (10) adaptable for outputting a predetermined volume of lubricating oil from a diesel engine into an engine fuel system (38) includes a piston (20) slidably disposed in a body (12) and cooperates with the body (12) to define a first and second chamber (22, 23) in the body at opposite ends of the piston (20). A controller (40) controls the movement of a valve (24) to alternately connect the first and second chambers (22, 23) to a pressurized source of oil so that fluid filling one chamber (22) moves the piston (20) which will expel fluid from the other chamber (23). The chamber remains filled until the valve (24) is actuated to connect the unfilled chamber to the pressure source which causes the chamber to fill with oil and expel the oil from the previously filled chamber.
Abstract:
In many types of construction machines, the frame assembly comprises a rear frame that supports the engine and the majority of the drive train components and a front frame that supports the work implement and related structure. In this type of machine, the two frames are normally pinned together and the front frame is articulated with respect to the rear frame by a pair of steering cylinders to provide steering for the machine. In order to provide the required structural support for the components of the work implement and to accommodate the steering forces, the front frame is necessarily quite large. The present invention provides a front frame (12) structure that includes a pair of main side plates (62, 64) that are positioned a preselected distance (W) from one another and mount a lift arm assembly (30) therebetween to minimize the overall width of the frame assembly. The forward end portion of the front frame assembly (12) has a preselected height (H) that permits the front frame to have a low profile. These features provide a frame assembly that allows an operator exceptional visibility to the work implement (42).
Abstract:
An outwardly opening valve system (10, 50) for an engine includes an engine (16, 55) having a hollow piston cylinder (17, 56) in fluid communication with a gas passageway (19, 60) via an opening (18, 58). The engine (16, 55) also has a piston bore (22, 61) that opens to the hollow piston cylinder (17, 56). A portion of the opening (18, 58) includes an outward valve seat (20, 59) positionned adjacent the gas passageway (19, 60). An outward valve member (11, 51) with a valve face (14, 52) is positioned substantially in the gas passageway (19, 60). The valve member (11, 51) is movable between a closed position in which the valve face (14, 52) is against the valve seat (20, 59) closing the opening and an open position in which the valve face (14, 52) is away from the valve seat (20, 59). An intensifier piston (23, 63) is positioned to reciprocate in the piston bore (22, 61) and has one end contacting gas within the hollow piston cylinder (17, 56). Finally, a coupling linkage (27, 67) interconnects the intensifier piston (23, 63) to the outward valve member (11, 51) so that the valve member (11, 51) is held closed during combustion by exploiting combustion pressure within the hollow piston cylinder (17, 56).
Abstract:
A calibration apparatus and method (10) for calibrating a hydraulic control valve (40) connected to an electronic controller (20). The electronic controller (20) selects control signals and reads corresponding hydraulic pressure outputs of the hydraulic control valve (40) and selectively records values corresponding to control signals that produce desired calibration pressures.