1
Marshall R Bulle, Dale A Johnson: Trailer hitch lock. Donald A Jacobson, April 15, 1986: US04581908 (18 worldwide citation)

A lock has a base with lip extensions which fit about the flange extensions of a ball hitch receptacle to cover the ball receptacle opening. The base is secured by a spring loaded latch having a ramp-shaped upper surface which is forced downward by a flange of the ball receptacle bearing against the ...


2
Marshall R Bulle: Trailer hitch ring lock. Donald A Jacobson, February 5, 1980: US04186575 (11 worldwide citation)

A lock apparatus comprising two parts which are secured together through the ring of a trailer hitch tongue to prevent the unauthorized use of the trailer. The two parts comprise mating first male and first female cylinders attached to first and second circular plates respectively, and a second male ...


3
Marshall R Bulle: Hand cart. Merchant Gould Smith Edell Welter & Schmidt, August 11, 1987: US04685854 (5 worldwide citation)

A hand cart particularly adapted for carrying a stack of material such as tires, barrels and the like utilizing a pair of arms activated by foot pedals to open and close the arms. The foot pedal mechanism is arranged such that the pedals will always be horizontal during the opening or closing of the ...


4
Marshall R Bulle: Metal stock bender. Nawrocki Rooney & Sivertson P A, May 6, 1997: US05626045 (4 worldwide citation)

A hand operated bending apparatus uses a lever arm which acts through a compound lever to increase the applied force. A pin, which mates with a number of holes at various distances along the compound lever linkage, permits changing the lever ratio readily. A bar extending outward from a forming die ...


5
Marshall R Bulle: Metal stock bender twister adaptor. Nawrocki Rooney & Sivertson P A, October 19, 2004: US06804980 (2 worldwide citation)

Adaptor and twister apparatus, which adapts an existing bender apparatus to also twist vertically oriented metal stock, is provided. Removing the alternate function's parts avoids interaction between them. The twister has an adjustable clamp which grips the supporting pedestal, having an attach ...


6
Marshall R Bulle, Dale A Johnson: Tire spreader. Donald A Jacobson, April 16, 1985: US04511121

Two hooks are pivotably mounted between two pair of vertically oriented pivotable spreader arms arranged such that the hooks can engage and spread a tire supported on two rollers between the hooks. The rollers are mounted on a plate supported by two vertical spaced channels held by a base. The arms ...


7
Marshall R Bulle: Acute angle metal stock bender. Nawrocki Rooney & Sivertson P A, May 26, 2009: US07536890

Apparatus for bending stock to an acute angle. A hydraulic cylinder with a ram extendable under hydraulic pressure provides the bending power. The ram automatically retracts from an extended position when hydraulic pressure is removed. One end of an apparatus supporting arm consists of a slide bar. ...


8
Marshall R Bulle: Repeatable bender angle apparatus. Nawrocki Rooney & Sivertson P A, July 10, 2012: US08215144

A manual and two pneumatic powered versions of bending apparatus with added indicator apparatus for indicating the bending arm angle, apparatus for rotating and locking the indicator apparatus at the rotated angle and stop means for stopping the bending arm at the rotated angle are provided. After a ...


9
Marshall R Bulle: Slide lock. Nawrocki Rooney & Sivertson P A, March 22, 2011: US07908899

Improved slide lock apparatus used in bending apparatus to bend stock to an acute angle. A hydraulic cylinder with a ram extendable under hydraulic pressure provides the bending power. The ram automatically retracts a slide from an first outward location when hydraulic pressure is removed to a secon ...


10
Marshall R Bulle: Acute angle metal stock bender. Nawrocki Rooney & Sivertson, Suite 401 Broadway Place East, August 7, 2008: US20080184758-A1

Apparatus for bending stock to an acute angle. A hydraulic cylinder with a ram extendable under hydraulic pressure provides the bending power. The ram automatically retracts from an extended position when hydraulic pressure is removed. One end of an apparatus supporting arm consists of a slide bar. ...