A fluid operated tool is provided which is operable particularly for purposes of causing the linear movement of a tool member in at least one direction. The tool includes a main body, a trigger, an On-Off valve spool, a main piston, a reversing assembly, an accumulator and means for attaching the tool member to the tool. The main body is provided with a plurality of bores in which the On-Off valve spool, the main piston, the reversing assembly, and the accumulator are respectively positioned, an...

The present invention relates to a method to determine a position of at least one mark provided on a substrate, comprising the actions of: detecting a first mark on said substrate by using a first detector, detecting a first set of marks comprising at least a second mark on said substrate by using a second detector, computing a first list of relative distance(s) between said first mark and mark(s) in said first set of marks, detecting the second mark on said substrate by using one of said first ...

Eight identical fasteners receive the corner portions of six rectangular sheets to maintain the sheets and fasteners in interlocked assembled relationship.

An anticipator for controlling the cycle rate of a thermostat. The anticipator has means for transferring heat supplied thereto, and a negative temperature coefficient resistor is enclosed within the heat transferring means and disposed in heat transfer relation with it for supplying the heat thereto. The resistance of the negative temperature coefficient resistor varies as a function of its temperature wherein the negative temperature coefficient resistor is responsive to current applied theret...

A housing for an electrical terminal of the type having a resilient locking tongue with a rearwardly directed free end, which housing is molded from plastics material with a terminal-receiving passageway open to a rear of the housing and a locking abutment having a forward face engageable by the free end of the locking tongue in a snap fit on insertion of the terminal front first into the passageway from the housing rear, and a resilient tongue pusher extending across the passageway forward of t...

Spacer for the connection of mold plates for making collapsible molds elements comprising a spacing portion which has at its ends holding portions, hinge like secured thereto via flexible hinges, wherein said spacing portion and said holding portions at its ends connected with one another via the flexible hinges are one piece of plastic material; and molds made therefrom.

A method of manufacturing a spherical bearing rod end having an outer race member, an intermediate member of yieldable material within and supported by said outer race member and an inner race operationally supported by said intermediate member comprising preforming a rod end blank having a ball-like section at one end thereof, flattening the spherical section to form two enlarged faces, each face having an inwardly disposed annular dished portion whereby the material flows uniformly to the oute...

A skateboard wheel includes a roller body consisting of a solid piece of resilient plastic formed with cooling bores passing therethrough. At one end region the roller body is formed with an enlarged recess with which the cooling bores communicate. In this recess the roller body has reinforcing fins intergral with the roller body, situated in planes which contain the axis of the roller body, and distributed about this axis.

An extensible cylinder slidably containing a fluid pressure actuated piston is provided with differential first and second area portions exposed to a piston actuating pressurized fluid and an opposing pressurized fluid which opposing fluid is pressurized by a fluid pressure amplifier or booster responsive to the piston actuating pressurized fluid to maintain a proportional relationship between the pressures of the piston actuating fluid and opposing fluid to thereby generate a force balance on t...

An asphalt kettle having a heating chamber therein for the receipt of asphalt and a three-dimensional closure secured over the chamber. The side walls of the closure are provided with chute-like openings through which asphalt chunks may be loaded into the chamber and these openings are provided with hingedly mounted interior doors which normally assume a closed condition under the influence of gravity and/or the creation of a high pressure condition within the chamber. The closure may lift, with...