Abstract:
Procédé de forgeage d'un segment de roue dentée pour le sous-châssis d'un véhicule du type à chenille. Le procédé de forgeage produit des segments de roues dentées qui répondent à des tolérances très strictes sans qu'un usinage ou un finissage supplémentaires ne soient nécessaires. Le procédé consiste à chauffer une billette métallique (5') dans un four électrique (60), à façonner grossièrement la billette (5'), à forger la billette (5') dans un moule (62) pour former un segment de roue dentée (5) possédant une taille et une forme sensiblement égales à la forme finie désirée du segment (51). Le segment de roue dentée forgé (5) est ébavuré et placé dans un moule de frappe (8) dans lequel au moins deux surfaces non parallèles (A, B, C) sont formées selon des dimensions finies désirées. L'invention comprend également un dispositif (8) permettant de forger un segment de roue dentée selon des dimensions finies désirées. Le dispositif (8) comprend un organe de moule supérieur (80), un organe de moule inférieur (8'), et un organe de moule mobile transversalement (82).
Abstract:
A dropout compensating signal conditioning circuit (10) especially well suited for conditioning signals utilized in doppler shift monitoring apparatus. The circuit (10) includes phase-locked loop (32) responsive to an input signal at (30) for generating a second signal at (44) of a frequency substantially directly proportional to the input signal. This circuit (10) provides an output on line (75) which tracks the input at (12) with great precision and is free from the occasional absence of one or more periods of the input signals, which is known as dropout.
Abstract:
A transmission module (10) having an offset arrangement of a transmission mechanism (11) relative to the axis (17) of the input shaft (16) of the module. The transmission mechanism (11) includes an input gear (12) and an output gear (13). The input shaft (16) is provided with an input transfer gear (18) meshed with the transmission mechanism input gear (12) and the transmission output gear (13) is meshed with an output transfer gear (19) rotatably driving an output bevel pinion gear (20) meshed with an output bevel ring gear (22) for delivering power to the apparatus to be driven. The module (10) includes an outer housing (25) which houses the transmission module components, which, in the illustrated embodiments, further include the transmission mechanism control (15). The power takeoff shaft (27), in the illustrated embodiment, extends coaxially of the input transfer gear (18) through the space within the housing (25) that is adjacent the output of the transmission mechanism (11), and through a support (26) defined by the housing portion (28) to an external power takeoff connector.
Abstract:
Appareil (10) et procédé de formation, in situ d'un organe de protection externe (12), de préférence un matériau en fil d'acier élastique, sur un tuyau (14). Le fil d'acier élastique est extrêmement avantageux comme matériau pour en faire des organes protecteurs. Jusqu'à présent, il a été nécessaire de préformer le fil d'acier élastique sur une machine de bobinage et d'installer des longueurs précoupées de serpentins sur des tuyaux partiellement assemblés. La présente invention surmonte les problèmes exposés ci-dessus concernant la construction et l'assemblage en proposant un appareil (10) et un procédé de formation de l'organe de protection en fil d'acier élastique (12) sur place sur un tuyau (14) ayant des raccords préassemblés aux deux extrémités. L'appareil (10) comprend une tête de formation (20) ayant une première et une seconde parties séparables (46, 48). Une pluralité d'organes matriciels radialement espacés (60) sont prévus sur la première et la seconde parties (46, 48) pour former entièrement deux rouleaux complets d'un organe de protection (12). L'appareil (10) et le procédé de la présente invention sont particulièrement utiles pour former des organes de protection en fil d'acier élastique sur des tuyaux hydrauliques de haute pression utilisés dans des conditions de fonctionnement rigoureuses.
Abstract:
A planetary transmission (10) including a front section (42/160) having a rotating housing (46/176) and a planetary gear set (20/162) with a ring gear (66/168), a sun gear (68/170) and a planet carrier (70/172). Advantageously, the rotating housing (46/176) serves as the input and one of the planet carrier (70) and the ring gear (168) serves as the output. The sun gear (68/170) is continually held stationary, a first clutch assembly (30/164) selectively connects the rotating housing (46/176) to the ring gear (66/168), and a second clutch assembly (32/166) selectively connects the rotating housing (46/176) to the planet carrier (70/172). The front section (42/160) of the transmission (10) is operatively connected to a rear section (44) for multi-speed use particularly adaptable to a truck or earthmoving vehicle.
Abstract:
Method and apparatus for efficiently reducing the amounts of nitrogen oxides contained in a combusted gas stream from an engine combustion chamber (14). Ammonia is reliably and instantaneously metered to the combusted gas stream conduit (24) in a preselected proportion to the fuel mass flow and only in response to the sensed temperature of the combusted gas stream in the reactor (26) being within a preselected range.
Abstract:
Heat recovery systems are useful, for example, in vehicles that generate large amounts of heat energy during operation. The heat energy is used to drive a turbine that produces useful work. In order to fully utilize the great majority of the heat energy produced, the engine exhaust is used to convert a fluid to a gas and superheat the gas to a preselected temperature at a preselected pressure. If the fluid entering the heat exchanger in the exhaust system is too cool, soot collects on the heat exchanger thus greatly reducing system efficiency. Also various oxides precipitate out of the exhaust and chemical attack the elements in the exhaust system. The present heat recovery system (10) utilizes the heat energy from the oil cooling system (26) to preheat all of the fluid before it reaches the exhaust system (16). Furthermore, the heat energy from the jacket water of the engine (12) is used to convert a portion of the preheated fluid to a gas. The system (16) converts the remaining portion of fluid to a gas and superheats the gas to a higher preselected temperature. A first stage (120) of a dual pressure turbine (100) receives the superheated gas and directs the gas at a supersonic velocity against the blades (126) of the rotor (124). The gas exiting the first stage (120) and the superheated gas at a lower preselected temperature are controllably and substantially separately directed to a second stage (150) at substantially the same velocity. This heat recovery system (10) fully utilizes the heat enregy generated by the engine (12) and substantially eliminates the sooting and the formation of oxides within the exhaust system (16). The dual pressure turbine (100) effectively utilizes the superheated gases to produce useful work at a high system efficiency.
Abstract:
An arc welding head (13) suitable for robotic welding has a fiber optic bundle (12) and remotely located laser light source (24) which is imaged onto an end of the fiber optic bundle (12) and optically linked to substantially a single fiber of the fiber optic bundle (12). The light source (24) is then repetitively scanned across the coherent arrangement of fibers within the bundle (12), such that, a substantial portion of the transmitted light will be sequentially delivered to each individual fiber within a row of fibers and subsequently delivered to a workpiece (11). This arrangement provides a high signal to noise ratio making the laser light reflected from the workpiece (11) easily distinguishable from the optical "noise" generated by the welding arc flash.
Abstract:
Apparatus (10) and method of turning a bushing (20) of a track chain link assembly (12) which enables the bushing (20) to be turned in place in the link assembly (12), thereby eliminating the need to disassemble the link assembly (12) in order to effect the bushing turn. The apparatus (10) includes clamping means (34) having three jaws (41, 42, 43) for clamping the bushing (20), each of which has a deformable insert (62) of an aluminum alloy so that, upon application of the clamping force, the shape of insert (62) can change to accommodate one-sided sprocket wear on the bushing (20) and insure intimate clamping contact therewith. Each of the deformable inserts (62) is supported on an arcuate surface (64) of a support block (60) which has apertures (66) and grooves (68) for providing space into which material of the insert (62) can extrude to facilitate the ability of insert to conform to the bushing (20). The grooves (68) are oriented longitudinally so as to provide a mechanical interlock between the insert (62) and the support blocks (60), thus eliminating any slippage between the block (60) and insert (62) as the links (15, 16) are being rotated.
Abstract:
Spring-applied, pressure-released brakes are useful, for example, in construction vehicles or other vehicles that require an automatic braking in the event of an engine failure. In order to tow the vehicle for service, the brakes must be released. Most brake release systems require an alternate pump and associated valves on each vehicle with the fluid from the alternate pump being controlled by the brake valve on the vehicle. The alternate pump on each vehicle add cost to the vehicle and the spool of the brake valve is a known path for fluid leakage thus requiring an alternate pump of a larger capacity than is actually needed. The present brake release mechanism (10) provides an isolating mechanism (84) that is effective to isolate a work port (46/48) of a brake valve (20) from a valving element (50/52) in a housing (30). The isolating mechanism (84) is adapted to connect with an alternate source (76) of pressurized fluid and adapted to direct the pressurized fluid to a brake (14, 14') for release thereof. The isolating mechanism (84) and the alternate source (76) of pressurized fluid are adaptable to several vehicles thus eliminating the need of the alternate pump and associated valves on each vehicle. Furthermore, the alternate source (76) is smaller in capacity since the leakage in the brake valve (20) during towing is eliminated.