Accessory Side Slope Blade for Bulldozers (Patent No: 481161)

Inventor: Burggren, Ora A.

Location: Calgary

Comments: see Glenbow Archives b 1888 m Muriel MacIntosh 1910, 3 children; farmer; construction worker; well-known cowboy; stampede; d 1987; see William Freeman who married Muriel's mother

Description: Having regard to the foregoing disclosure, the patent of which this specification forms part confers, subject to the conditions prescribed in The Patent Act,1935, the exclusive right, privilege and liberty of making, constructing, using and vending to others to be used, the invention as defined in claims submitted by the patentee as follows:

1. A road scraper blade for forming side slopes, and to be mounted as an accessory on the conventional blade of a dirt moving machine such as a bulldozer, comprising in
junction a lever arm pivotally connecting these two blades together, a plate mounted rigidly on the rear face of said bulldozer blade and slotted lengthwise to receive a slidable pivot bolt of the lever arm for reciprocal movement therealong, a pivot bolt on the other end of said arm connecting same pivotally with said accessory scraper blade, means to slide said slidable bolt with its arm along said slot to raise and lower said accessory blade thereby, and in swingable manner relative to said bulldozer blade, a swingable link pivotally connecting the bulldozer blade with the accessory blade at
their rotatively coordinating ends so that the accessory blade will swing outwardly away from and reversely towards the bulldozer blade at one end as said bolt of the slidable lever arm slides reciprocally within said plate slot, and an adjustable bar bracing the accessory blade to a part of the bulldozer machine.

2. Dirt scraper apparatus for forming side sloping fills and down sloping banks, comprising an accessory scraper blade coordinating at one end with a conventional blade of a road scraper machine, a lever arm pivotally connecting these two blades together by means of a pivot bolt at each end of the arm in a relatively adjustable manner, a plate mounted longitudinally on the blade of the road scraper machine, a slot longitudinally apertured in said plate to receive one of said pivot bolts for reciprocal guidance of said arm, powered means to slidably reciprocate this bolt and its pivotally attached said arm relative to said slot, a link pivotally anchored at one end on said road scraper machine blade, and the other end pivotally attached to the accessory blade with a bolt radially swingable about said anchored bolt, about which bolt the accessory blade swings into its variable positions on application of power to said slot-guided bolt, and. means to brace the accessory blade to its mounting machine when in its extended positions.

3. Dirt moving apparatus for use with a road scraper of the bulldozer type, comprising an accessory blade pivotally mounted on and swingable relatively with a conventional blade of said road scraper and outwardly beyond one end of its conventional blade, for the construction and grading of angularly up and down slopes with relation to the road grade level, a longitudinally slotted plate attached to said conventional scraper blade, a pivot bolt slidable reciprocally within said slot, a lever arm pivotally connecting the swingable blade with said pivot bolt, powered means to reciprocally move said pivot bolt and its attached lever arm, link means to loosely connect one end of said swingable blade with said conventional scraper blade to retain the swingable blade during its powered swinging action and in its outboard positions, a roller on said scraper blade to slidably support said accessory blade, and means to brace said accessory blade in its operational positions.