Abstract: A braking system stopping the rotational movement of a spindles used in power equipment may have brake pads that engage the spindle. The braking system has a brake arm that pivots at one end and has a brake pad at the other end. The brake arm is connected to a spring which, when the brake system is engaged, causes the brake arm to pivot upwards and the brake pad comes into contact with a rotating spindle or pulley. For example, the pulley may be attached to a lawn mower blade. The combination of the spring pivoting the brake arm upwards as well as the rotation of the pulley towards the brake arm causes the pulley to cease rotating, bringing the rotating member to a stop.

Abstract: A wheel hub assembly for use in powered lawn equipment is disclosed. The wheel hub assembly has a receiving member which is coupled to an intermediate shaft having an intermediate gear. The intermediate gear is coupled to an output shaft having an output gear. The output shaft is connected to an output hub; the intermediate shaft gear meshes with the output gear such that when the receiving pulley is rotated in one direction, the output hub rotates in the opposite direction.

Abstract: A wing lawn mower for cutting grass is herein described. The wing lawn mower is attached to a main mower, the wing mower moveable from a lowered position to a raised position. When in the lowered position, the wing mower is driven by a wing belt, which is in turn driven by a main mower deck pulley. When the wing mower is moved to the raised position, the wing belt becomes slack. The slack causes the wing mower blades to cease turning. Then the wing mower is lowered into the cutting position, the wing belt pulled taught. When this occurs, the wing belt is guided back into place against the wing pulley by belt retainers. This allows the wing mower to be raised and lowered without having to remove or reconfigure the wing belt.

Abstract: A bypass pin for a hydrostatic transmission is disclosed. The hydrostatic transmission has a hydraulic pump. The bypass pin has a head positioned at one end of a shaft. The bypass pin also has a tip positioned at an opposite end of the shaft. The bypass pin is configured to receive a linear force exerted against the head in a first direction which causes the bypass pin to move in the first direction. The shaft of the bypass pin is configured to be positioned through a casing containing the hydrostatic transmission. The tip is configured to contact a rotating member in the hydraulic pump when the rotating member is in contact with a fluid directional member, the tip pushing the rotating member away from a fluid directional member in the first direction when the linear force is applied.

Abstract: A bypass pin for a hydrostatic transmission is disclosed. The hydrostatic transmission has a hydraulic pump. The bypass pin has a head positioned at one end of a shaft. The bypass pin also has a tip positioned at an opposite end of the shaft. The bypass pin is configured to receive a linear force exerted against the head in a first direction which causes the bypass pin to move in the first direction. The shaft of the bypass pin is configured to be positioned through a casing containing the hydrostatic transmission. The tip is configured to contact a rotating member in the hydraulic pump when the rotating member is in contact with a fluid directional member, the tip pushing the rotating member away from a fluid directional member in the first direction when the linear force is applied.

Abstract: A gradual engagement system for use in power equipment is herein described. The gradual engagement system causes a clutch pulley to rotate around a clutch arm when an engagement tensile force is applied by an engagement spring. The engagement spring is attached to a pivot arm which is also connected to the clutch arm. The gradual engagement system allows the clutch arm to be pressed against a drive belt in a gradual fashion, providing for a smooth engagement of the various components of the power equipment.

Abstract: A gradual engagement system for use in power equipment is herein described. The gradual engagement system causes a clutch pulley to rotate around a clutch arm when an engagement tensile force is applied by an engagement spring. The engagement spring is attached to a pivot arm which is also connected to the clutch arm. The gradual engagement system allows the clutch arm to be pressed against a drive belt in a gradual fashion, providing for a smooth engagement of the various components of the power equipment.

Abstract: A wing lawn mower for cutting grass is disclosed. The wing lawn mower is attached to a main mower, the wing mower moveable from a lowered position to a raised position. When in the lowered position, the wing mower is driven by a wing belt which is in turn driven by a main mower deck pulley. When the wing mower is moved to the raised position, tension in the wing belt is removed and the wing belt is held in place by retainers, allowing the wing mower to be raised and lowered without having to remove or reconfigure the wing belt.

Abstract: A wheel hub assembly for use in powered lawn equipment is disclosed. The wheel hub assembly has a receiving member which is coupled to an intermediate shaft having an intermediate gear. The intermediate gear is coupled to an output shaft having an output gear. The output shaft is connected to an output hub; the intermediate shaft gear meshes with the output gear such that when the receiving pulley is rotated in one direction, the output hub rotates in the opposite direction.

Abstract: A brake system for use in power equipment is disclosed. The brake system has a brake arm that pivots at one end and has a brake pad at the other end. The brake arm is connected to a spring which, when the brake system is engaged, the spring causes the brake arm to pivot upwards and the brake pad comes into contact with a rotating member, for example a pulley, that may be attached to a lawn mower blade. The combination of the spring pivoting the brake arm upwards as well as the rotation of the pulley towards the brake arm causes the pulley to cease rotating, bringing the rotating member to a stop. The operator of the power equipment may have a lever or other apparatus to cause the brake arm to move between an engaged position and a disengaged position.

Abstract: A tire tread (74,76,194) is injection molded by increments in a mold cavity (56,58,119,224,262) having an open end (110,272) closed by a trailing end (116) of a cured section (114,228). A temperature moderating closed end (109,207,268) prevents complete curing of a trailing portion (116) of the cured section (114,228) while the rest of the section is cured. The mold (14,16,90,188,236) is opened so that the cured section (114,228) may be shifted to a position where the trailing portion (116) is clamped in the open end (110,272) of the mold cavity (56,58,119,224,262). A second section (118,228,264) is injection molded in the cavity (56,58,119,224,262) and the partially cured trailing portion (126) of the cured section (114,228,264) is cured and adhered to the leading portion (130) of the second section (114,228,264) as the second section is cured. This process may then be repeated for later sections to provide a desired length of cured tire tread stock (74,194,264).

Abstract: A tire tread (74,76,194) is injection molded by increments in a mold cavity (56,58,119,224,262) having an open end (110,272) closed by a trailing end (116) of a cured section (114,228). A temperature moderating closed end (109,207,268) prevents complete curing of a trailing portion (116) of the cured section (114,228) while the rest of the section is cured. The mold (14,16,90,188,236) is opened so that the cured section (114,228) may be shifted to a position where the trailing portion (116) is clamped in the open end (110,272) of the mold cavity (56,58,119,224,262). A second section (118,228,264) is injection molded in the cavity (56,58,119,224,262) and the partially cured trailing portion (126) of the cured section (114,228,264) is cured and adhered to the leading portion (130) of the second section (114,228,264) as the second section is cured. This process may then be repeated for later sections to provide a desired length of cured tire tread stock (74,194,264).

Abstract: Phosphoric acids of significantly different content of soluble impurities, especially magnesium compounds, can be blended to produce a phosphoric acid with a decreased tendency for forming detrimental solids when converted to a liquid fertilizer or on storage, or during transportation as when the acid is transported by ocean vessel or rail road tank car. The blending can be effected either before or after a concentration step or steps (e.g., evaporation to "merchant grade" or to superphosphoric acid). For example, wet process phosphoric acid produced by a dihydrate or gypsum process can be blended with a phosphoric acid produced by a hemihydrate process.

Abstract: Phosphoric acids of significantly different content of soluble impurities, especially magnesium compounds, can be blended to produce a phosphoric acid with a decreased tendency for forming detrimental solids when converted to a liquid fertilizer or on storage, or during transportation as when the acid is transported by ocean vessel or railroad tank car. The blending can be effected either before or after a concentration step or steps (e.g., evaporation to "merchant grade" or to superphosphoric acid). For example, wet process phosphoric acid produced by a dihydrate or gypsum process can be blended with a phosphoric acid produced by a hemihydrate process.

Abstract: Phosphoric acids of significantly different content of soluble impurities, especially magnesium compounds, can be blended to produce a phosphoric acid with a decreased tendency for forming detrimental solids when converted to a liquid fertilizer or on storage, or during transportation as when the acid is transported by ocean vessel or railroad tank car. The blending can be effected either before or after a concentration step or steps (e.g., evaporation to "merchant grade" or to superphosphoric acid). For example, wet process phosphoric acid produced by a dihydrate or gypsum process can be blended with a phosphoric acid produced by a hemihydrate process.

Abstract: Metal ion impurities are removed from phosphoric acid by adding to the acid a precipitant comprising ions of calcium and fluorine to cause precipitation of a magnesium-containing precipitate. A preferred precipitant is one containing calcium flouride, such as the sludge obtained by treating pond water from a phosphoric acid plant with a calcium-containing compound. Preferably, the soluble sulfate content of the phosphoric acid is maintained at at least about 2% by weight. An animal feed can be prepared from the precipitate by combining the precipitate with phosphate rock, water, and a sodium-containing compound, and then calcining the combination.

Abstract: Anhydrous hydrogen fluoride of high purity can be recovered from metallic fluoride salts containing phosphate values by digesting the metallic salts in an aqueous solution in a humid atmosphere at a sufficiently high temperature to release a gas containing hydrogen fluoride and negligible amount of P.sub.2 O.sub.5. The released gas is rectified in a rectification operation which includes a rectification zone in which the rectification occurs in the presence of sulfuric acid.

Abstract: Calcium fluoride is produced from pond waters resulting from phosphoric acid processing by treating the pond waters with calcium carbonate and/or calcium oxide in two stages to precipitate out the major part of the fluorine values from the waters as calcium fluoride. After removal of the calcium fluoride the filtrate is treated with calcium oxide to remove a substantial portion of the remaining fluorine values as calcium fluoride. After removal of these calcium fluoride solids, the filtrate is treated with another charge of calcium oxide to produce dicalcium phosphate (dical) which is separated from the aqueous phase. The aqueous phase is treated with an additional charge of calcium oxide to remove a substantial portion of the solids from the aqueous phase leaving waters that can be discharged as waste or recycled as process water.

Abstract: Metal ion impurities are removed from phosphoric acid by adding to the acid a precipitant comprising ions of calcium and fluorine to cause precipitation of a fluoride solid which contains ions of magnesium, and other metals (e.g., Al, N.sub.a) which were in the impure acid. A preferred precipitant comprises calcium fluoride, such as the sludge obtained by treating pond water from a phosphoric acid plant with calcium ions (e.g. lime and/or limestone).