Abstract: PCT No. PCT/US80/00056 Sec. 371 Jan. 21, 1980 Sec. 102(e) Date Jan. 21, 1980 PCT Filed Jan. 21, 1980A joint sealing structure (16) providing a seal between variably spaced joint members (11,12). The sealing structure includes a seal element (17) having a lip portion (20) engaging a sealing surface (21) of one of the joint members (12) and a base portion (19) having a dynamic sealing engagement with the other of the joint members (11). The lip portion is carried on a flexible mounting portion (18). A Belleville spring (24) applies a sealing force to the lip portion (20) through a stiffener ring (23) held against the seal element solely by the force of the spring without the need for bonding or other fastening means. The stiffener ring may embrace a portion (22) of the seal element which, in the illustrated embodiment, comprises a corner portion thereof. A portion (26) of the stiffener ring may be axially aligned with the lip portion (20) of the seal element.

Abstract: PCT No. PCT/US79/00133 Sec. 371 Date Mar. 5, 1979 Sec. 102(e) Date Mar. 5, 1979, PCT Filed Mar. 5, 1979 PCT Pub. No. WO 80/01927 PCT Pub. Date Sept. 18, 1980A router bit assembly (18,22) for the sides (20,24) of the bowl (10) of an earthmoving machine (12). The router bit assembly is of two-piece construction and includes a router bit (42) and a holder (26) which, when secured to the vertical side walls (20,24) of the bowl (10), captures the bit (42) between the holder (26) and the vertical side wall (24). The rear edge (56) of the bit (42) is held against the leading edge (58) of the corner (25) of the vertical side wall (24) by the holder (26). The two-piece router bit assembly advantageously reduces the amount of metal that is discarded when the life of the bit is expended.

Abstract: A differential (10) having differential gears (56,58) connecting a pair of axles (44,46) includes a pair of opposed cam rings (66,68) mounted for rotation with one of the axles. One cam ring (66) is adapted to lock the axles (44,46) relative to the differential housing (12) when no differential rotation exists between the axles (44,46) and is movable when differential rotation does exist by the interaction between the cam rings (66,68) to an inoperative position to unlock the axles from the housing. A lockout ring (70) maintains the cam rings (66,68) in disengaged relation during differential rotation.

Abstract: PCT No. PCT/US79/00841 Sec. 371 Date Oct. 15, 1979 Sec. 102(e) Date Oct. 15, 1979, PCT Filed Oct. 15, 1979A stabilized seal structure (24,124,224) for use in a seal space (20,120,220) defined by a first wall (17), a second wall (18) confronting the first wall and variably spaced therefrom, a third wall (19) extending across the seal space between the first and second walls, and a fourth wall (16) extending across the space oppositely of the third wall (19). The seal structure includes a seal member (25,125,225) defining a first leg (26,126,226), a second leg (27,127,227) having a sealing portion (34,134,234) engaging the second wall, and a bight portion (28,128,228) extending adjacent the fourth wall. The legs and bight portion cooperatively define a load member space (29,129,229) receiving a load ring (30,130,230). At least one of the bight portion of the seal ring and the fourth wall is provided with an annular recess (31,13,231) facing the other element.

Abstract: A parking brake and transmission interlock system including a transmission control element (30) movable between at least two opposed drive positions and an intermediate neutral position, a parking brake control element (14-22) movable between engaged and disengaged positions, a stop (36) having two stop surfaces (38,40) connected to the transmission control element (30), to be movable therewith between the drive and neutral positions, a pair of movably mounted abutments (52,56) each confronting a respective one of the stop surfaces (38,40) and engageable therewith, a spring (58) biasing each of the abutments (52,56) toward its associated stop surface (38,40) to engage the same and urge the stop (36) toward the neutral position, and a fluid motor (64) responsive to the positioning of the brake control element (14-22) in the disengaged position for moving the abutments (52,56) away from the associated stop surfaces (38,40) so that the transmission control element (30) may be freely moved between the drive and n

Abstract: An impact mechanism for rock breaking, pile driving and pile extracting, and the like, includes a head assembly (18) with a pair of shank members (24,26) movably mounted thereto and flywheel (76,78) and eccentric crankshaft parts (74) rotated by a motor (84). The crankshaft parts (74) intermittently contact one of the shank members (24,26) to drive it outwardly from the head assembly (18) by transmitting flywheel energy thereto. A biasing and dampening device (110) associated with each shank member (24,26) absorbs rebound energy from the shank member (24,26) and maintains the shank members (24,26) disengaged from the crankshaft parts (74) until it is positively urged thereagainst. The head assembly (18) is movably mounted at the end of an articulated arm (10) for maneuvering it into desired work position.

Abstract: A method of preparing large pore volume zirconia-silica catalyst supports, the resulting supports and a method of polymerizing olefins comprising contacting an olefin or mixture of olefins with a catalyst prepared with these supports. The supports are prepared by reacting a zirconium compound of the formula M.sub.4 Zr(C.sub.2 O.sub.4).sub.4.nH.sub.2 O, where M is an alkali metal or ammonium ion and n equals 0 to 10, with a silicon compound of the type A.sub.2 SiO.sub.3, where A is an alkali metal, in an aqueous solution at a pH equal to at least 11, then adding an acidic solution to a pH of about 5-9 to produce a hydrocogel. The hydrocogel is then aged and washed free of soluble by-products first with water, then with aqueous ammonium nitrate and again with water. The water is removed from the washed hydrocogel by azeotropic distillation or by washing with a water miscible solvent and then calcining the resulting xerocogel.

Abstract: A control circuit for effectively preventing damage to the blower or fan motor of a vacuum cleaner which could otherwise result from a jammed condition of the beater brush thereof. The control circuit effects discontinuation of the energization of the motor in the event the rotational speed of the beater brush drops below a preselected speed. The discontinuation of energization may be effected by the control a preselected period of time after the speed drops below the preselected speed. An indicating device may be provided for indicating such discontinuation of energization. A second indicating device may be provided for indicating a reduction in speed of the beater brush less than that sufficient to cause discontinuation of the energization but sufficient to warrant warning the user that a partial jamming of the beater brush has occurred.

Abstract: A spool valve including a valve body having a bore intercepted by at least two axially spaced ports and a spool reciprocally received within the bore and having two axially spaced lands separated by a groove, one side wall of the groove being adjacent one of the lands and defining a shoulder. At least one shallow metering slot is disposed in the other of the lands and opens to the groove through another side wall thereof opposite from the first mentioned side wall. The slot has an increasing depth in the direction toward the groove and a cross sectional area taken transversely to the axis of the spool at any point along the slot less than the area of the top of the slot from the point to the end of the slot remote from the groove. An additional slot is disposed in the shoulder and opens to the groove, has a ramp-like bottom, and a width different from that of the metering slot.

Abstract: An improved tire bead seating apparatus for use with tire changers. The tire changer serves as a support structure for tire bead seating apparatus which includes at least one nozzle having an outlet end adapted to be directed at the interface of a tire bead and wheel rim. The nozzle has an internal passage terminating at the outlet end which internal passage has a straight line length extending from the outlet end of at least 1/4 inch. The internal passage in the nozzle also has a substantially uniform cross section over the straight line length thereof. One embodiment of the invention shows the use of the improved bead seating apparatus in a tire changing stand of the type having a rotatable rim receiving table while another embodiment illustrates the tire bead seating apparatus in connection with a tire changing apparatus having a stationary table.

Abstract: Disclosed is a spring-engaged, pressure fluid-disengaged, parking brake of the disc type which includes an annular piston movable towards and away from the brake discs for engaging and disengaging the brake. The brake housing includes an aperture coaxial with the brake shaft and the piston carries a tapped bore in alignment with the aperture in the housing. A bolt may be threaded into the bore through the aperture and rotated to draw the piston towards the aperture to disengage the brake in the absence of pressure fluid.

Abstract: A windshield wiper (10) is provided with parts for connecting a plastic windshield wiper blade assembly (11) to a wiper arm (14). The connecting parts include a side pin (30) carried by the wiper arm (14) having a keyway (75) at the end (71) thereof and a pin-receiving aperture (42) defined in a yoke (17) with a U-shaped spring (50) extending in chordal fashion through the aperture (42) and a key (66) projecting into the aperture (42). When the side pin (30) is fully inserted into the aperture (42), spring portions (57,58) will releasably seat in a reduced diameter constricted segment (69) of the side pin (30) to secure the yoke (17) on the wiper arm (14). If the side pin (30) is not fully inserted, engagement of the key (66) and the keyway (75) will lock the yoke (17) and the wiper arm (14) in skewed relation to prevent proper contact of a wiping element (27) carried by the yoke (17) with a windshield (16).

Abstract: A circuit for providing a signal proportional to the RMS value of a periodic input waveform having either a variable or fixed frequency. The input waveform is applied to a rectifier. The output from the rectifier is squared and integrated at least once each period of the periodic waveform. The integrated voltage is sampled and a voltage equal to the sampled voltage is applied to a divider circuit. The output of the divider circuit is applied to a square root circuit until the integrated voltage is again sampled, at which time the voltage provided to the square root circuit is updated. The output from the square root circuit is a voltage proportional to the RMS value of the input waveform. The circuit can be coupled to an AC generator to provide RMS regulation of the AC voltage wherein the voltage proportional to the RMS value of the input waveform is applied to the exciter winding of the generator for control thereof.

Abstract: A dishwasher apparatus having an improved soil separator arranged to bypass a portion of the dishwashing liquid being circulated by the circulation impeller and to separate from the bypass portion of the dishwashing liquid soil which may have been entrained therein. The cleansed dishwashing liquid is then returned to the circulation system for reuse in effecting the dishwashing operation. The soil separator is further arranged to separate from the dishwashing liquid delivered thereto air which may have been entrained in the liquid and return the air to the dishwashing liquid being circulated for washing the dishes. The structure for collecting the soil is arranged to collect the soil from a relatively slowly moving portion of the bypassed liquid. The soil separator structure is arranged to effectively discharge the collected soil to drain upon initiation of a drain operation.

Abstract: A composite article and method of forming the same wherein an inner casting is separated from an outer casting by an insulative portion defining the pattern for the outer surface of the inner casting and the pattern for the inner surface of the outer casting. The insulative portion is captured between the castings to define a thermal barrier therebetween. The castings are formed by gasifying an expendable gasifiable pattern corresponding to the inner and outer castings, respectively. The patterns are assembled with the insulative portion of the article disposed therebetween and a mold is formed about the assembled patterns and insulative portion. Upon pouring of molten casting metal into the mold, the expendable patterns are gasified into the mold, permitting the inner and outer portions of the article to be cast about the insulative portion to form the desired final composite article.

Abstract: This invention relates to apparatus for drying gases, more particularly compressed air. In the gas drying apparatus there is presented a single vessel partitioned into various flow passages so as to direct the incoming water vapor bearing compressed gases through a heat exchanger, a refrigeration section, a demister, and then through a second heat exchanger for exit from the apparatus. The arrangement of parts is such as to permit all of these functions in a very small vessel.

Abstract: A portable shell of a lightweight construction usable as a room divider, display panel, or acoustical or visual enclosure detachably connectable to the framework for mounting in either a support position or a storage position. The leg structure includes a pair of legs each having a pivotally-mounted foot movable between an operative position or a storage position. Additionally, the shell has a canopy panel hinged to one end thereof for extending the height of the shell and the legs can be attached at different positions on the framework for providing different effective shell heights.

Abstract: A track assembly for crawler-type vehicles including a pair of spaced endless belts formed of flexible material and disposed in a generally parallel relation, a plurality of shoe-mounting cross bars extending through each of the belts to project from both sides thereof, the cross bars in one belt being aligned with the cross bars in the other belt, a plurality of elongated shoes spanning the belts and secured to corresponding aligned ones of the cross bars and disposed on the outer sides of the belts, a plurality of inwardly directed, sprocket engaging, nose-shaped lugs disposed in the space between the belts and extending inwardly of the inner sides thereof and secured to adjacent ends of aligned ones of the cross bars, and a plurality of inwardly directed, lateral guides on the inner sides of the belt extending inwardly of the inner sides thereof and secured to remote ends of aligned ones of the cross bars.

Abstract: .Iadd.An electronic scorer for scoring bowling games played by a multiplicity of players including a device for receiving pinfall information relevant to the balls rolled by a multiplicity of players during a bowling game, a single computation device for computing the bowling scores for all of the multiplicity of players, a multiple player storage for storing scores held by the multiplicity of players and other information relevant to their games and a single control system connected to the pinfall receiving device, the computer and the multiple player storage for directing the computation of the bowling scores of each of the multiplicity of players. .Iaddend.

Abstract: A bowling score computer having either manual keyboard or automatic pinfall sensing input. The computer is operative to record mark counts, totalize and display team scores, allow entry of handicap scores and automatically record pace-setter scores. First and second pinfall values for each frame are recorded and the scoring cycle is modified in accordance with first and second ball pinfall. In a first embodiment the frame scores are printed on individual tablets which are thereafter manipulated to display positions. In a second embodiment, the scores are printed on a moveably disposed scoresheet. A device is provided for projecting the scores.