Abstract:
A track-type vehicle (10) includes a track roller frame (13), a track idler (18) mounted forwardly on the track roller frame (13), and a recoil system (19) interconnected between the track roller frame (13) and the track idler (18). Conventional recoil systems, such as those employing one or more return springs therein, are sometimes subjected to adverse impact loads which could unduly subject undercarriage components to high stresses. This invention is directed to a slider assembly (29) slidably mounted for fore and aft movements on the track roller frame (13) and having the track idler (18) rotatably mounted thereon. Linear movement of the slider assembly (29) on the track roller frame (13) is guided by a pair of guides (30) laterally spaced on either side of the track idler (18).
Abstract:
Heat exchangers depend for efficiency upon maximizing fluid flow, such as air, through their fins about tubes extending through the fins. The air flow, particularly at the ends of a heat exchanger, can sometimes be of a significantly reduced amount owing to flow restrictions caused by the construction of, or arrangement of elements in, a heat exchanger. A core (12) of a heat exchanger (10) of the present invention utilizes a relatively varied angular arrangement for tubes (16) in the core (12) which improves air flow, particularly at the ends (28, 40) of the core (12). Air flow is thus improved over a portion of the heat exchanger (10) to increase heat transfer, as well as purging of debris, for the folded or zigzag core arrangement described.
Abstract:
A transfer gear mechanism (24) for a four-wheel drive tractor (10) or the like includes a depending gear transfer train (28) that has an input gear (34) on an upper axis (36) and an output gear (38) on a lower axis (40). Housing means (26) are provided for supporting the gear transfer train (28), a pump (196) along the upper axis (36), and a PTO clutch assembly (52) along a third axis (54) between the upper and lower axes (36, 40) such that the PTO clutch assembly (52) is disposed underneath the pump (196) at an effective location. A service brake assembly (44) is also disposed on the lower axis (40) and it, the pump (196) and the PTO clutch assembly (52) can be individually serviced.
Abstract:
A sensor (10) for indicating the presence or absence of a liquid adjacent the sensor (10). The sensor (10) has first and second spaced apart thermistors (26, 28) and means (38) for controllably heating the second thermistor (28). A voltage is applied to a circuit including each of the thermistors (26, 28) and the voltages at the input (30, 30') of each of the two thermistors (26, 28) are compared by a voltage comparator (42). In response to these voltages differing by more than a preselected amount, the voltage comparator (42) produces a signal used to activate either a warning system or an engine shut-down system.
Abstract:
La présente invention élimine les désavantages du solénoïde hélicoïdal de l'art antérieur en proposant un agencement unique d'un enroulement de bobine et une construction de noyau modulaire qui non seulement permettent un assemblage rapide et économique de solénoïde de diverses dimensions produisant des forces d'intensité différente mais éliminent la tendance de l'induit à tourner par rapport au noyau. Le solénoïde à réponse rapide (10) comprend un premier et un second organe magnétisables (12, 14) montés de manière télescopique avec un mouvement axial rotatif. Le premier organe interne (12) comprend un nombre sélectionnable de sections modulaires identiques individuelles (16) qui définissent d'une manière collective une pluralité de fentes circulaires espacées longitudinalement (18). Le second organe externe (14) est formé en deux moitiés (14a, 14b) et comprend une pluralité de projections en forme d'anneaux espacées longitudinalement (20) qui s'étendent respectivement dans les fentes (18). On fait tourner certaines de ces sections (16) de 180o pendant l'assemblage de manière à générer des flux de courants dirigés en sens opposés dans les portions d'enroulement (38) des sections adjacentes (16).
Abstract:
A drive mechanism (10) for rotating a pair of tandem wheel assemblies (24, 26) journalled on a centrally pivoted tandem drive housing (16). A jointless elastomeric belt (82) extends about the wheel assemblies which are driven by two chains (32, 38) entrained over respective sprockets (34, 36, 40, 42) contained within the tandem drive housing. A planetary gear set (109) is effective to powerably drive both chains with a differential action to minimize the influence of the belt loading upon the chains. The planetary gear set and the sprockets are constructed to deliver a greater torque to the rear wheel assembly (24) than the front wheel assembly (26) through the chains.
Abstract:
A compact nutating traction drive transmission (10) having particular utility in a vehicle (232) as a steering differential. The transmission (10) includes an input body (38) rotatable about a central axis (32), first and second cone-like members (84, 86) rotatably mounted on the body (38) on an inclined axis (32), and a pair of traction rings (60, 62) reacting against the respective cone-like members (84, 86). A first embodiment includes a tubular shaft (110) and a solid main shaft (108) which are rotatably mounted and pilotably interconnected along the inclined axis (88), and a coupling apparatus (114) is utilized for transmitting torque independently from the cone-like members (84, 86) to their respective shafts (110, 108). Similar axially compact gear trains (206) are driven by the respective shafts (110, 108) which have a construction and gear train ratio sufficient for maximizing the effectiveness of the transmission (10). A second embodiment includes a tubular shaft (110), a solid shaft (108), and an extension shaft (282) connected to the second cone-like member (86') for providing a greater resistance to bending centrally thereof than the first embodiment.
Abstract:
In the use of fuel injection pumps, a distributing rotor is often utilized to sequentially deliver fuel from an inlet to a combustion chamber on an engine in combination with one or more reciprocating high pressure pistons. Due to the positioning of the various passages through which the fuel is directed, cavitation of the pump is often experienced which has a very serious effect on the life of the components within the pump. The fluid distribution apparatus (10) of the present invention provides a single delivery passage (58, 60) between the pumping chambers (22, 24) of the reciprocating pistons (26, 28) and the distributing rotor (82). With this arrangement, fluid that is communicated from the bore (54) to the pumping chambers (22, 24) in response to the intake stroke of the pistons (26, 28) is directed back through the same passage (58, 60) during the pressurization stroke of the pistons (26, 28). The positioning of the single delivery passages (58, 60) prevents the fuel injection pump from experiencing the severe cavitation that is common with previous designs and thus the fore-shortened life of the pump components.
Abstract:
Previously disclosed distributor fuel injection pumps for internal combustion engines offer the advantages of reduced size, weight, and cost of a fuel injection system. However, these pumps have not been able to provide relatively high fuel injection pressures which could improve fuel combustion for better fuel economy and lower noxious emissions. In contrast, the subject distributor fuel injection pump (14) generates relatively high fuel injection pressures in a relatively compact arrangement. A semi-spherical nutator member (74) freely rotatably mounted on an oblique journal (66) of a drive shaft (38) imparts high speed harmonic motion to at least one reciprocating pump plunger (310, 314) for pressurizing the fuel. A relatively large semi-spherical bearing interface (82, 86) between the nutator member and a pump housing (34) accomodates very high pumping reaction loads. A distributor rotor (348) for sequentially delivering the pressurized fuel to more than one engine combustion cylinder is rotatively driven by a planetary gear reduction mechanism (392, 396, 424, 428, 432, 436, 440, 444, 448) coupled to the drive shaft. Very little force is required to adjust either the timing or quantity of fuel injection which are adjustable by angular movement of at either a normally stationary planetary ring gear (396) or a fuel metering collar (146), respectively.
Abstract:
A load responsive fluid power and control system in which the speed of the prime mover (15), driving a fixed displacement pump (11), is varied to maintain a constant pressure differential between pump discharge pressure and maximum system load pressure, above a certain predetermined system flow level and in which this constant pressure differential is maintained by pump flow bypass control (36, 10), at system flows below this predetermined level.