An improved jointer device comprises removable jointer blade attached to a plate member; in a preferred embodiment, the plate member comprises a pair of plate member halves between which the jointer blade is clamped.

A compressor cylinder is provided, along its outer periphery, with an annular supply channel for a working fluid, this channel communicating with the interior of the cylinder via a multiplicity of triangular ports lying in the path of reciprocation of the piston. The cylinder head carries an outlet with a check valve which closes during the suction stroke so that a partial vacuum is created inside the cylinder until the piston clears the ports to aspirate the fluid; upon the subsequent return st...

A conveyor system having pusher assemblies on a driven chain supported above a carrier track along which carriers are propelled with each carrier having a front trolley having a push lug and a rear trolley having a release camming lug. The pusher assemblies include a pivotedly supported front pusher dog assembly and a pivotally supported rear pusher dog assembly with the front pusher dog assembly including a forwardly projecting release blade for releasing the pusher dog from driving engagement ...

In combination with an apparatus having at least one stationary ring gear and one planet gear for each ring gear for converting rotary motion into rectilinear reciprocating motion of a reciprocating member attached to the pitch circle of the said planet gear by rotary attach means, a planet gear swallowing counterweight for each planet gear having mass sufficient to offset that of the reciprocating member, the counterweight having a cross sectional shape which is quadrilaterally symmetrical abou...

The invention is a free-piston pump incorporating an integral switching ve modified for fail proof operation.

A piston engine comprises a cylinder defining a combustion chamber, a ringless piston reciprocally mounted within the cylinder, the cylinder having means spaced from the combustion chamber and defining a zone of reduced clearance around the piston. This zone-defining means includes means for lubricating the zone to reduce friction. The lubricating means may comprise a gas-flow arrangement, or a bushing formed of self-lubricating material, or both of these features. The cylinder and piston are fa...

A by-pass including a heat regenerator is provided for a cylinder in which an oscillating free piston of a gas pump is driven. Shunting of gas back and forth through the by-pass between disparate hot and cold regions of the cylinder while the piston coasts in the by-pass region produces a periodic temperature and pressure variation which may be applied to a load. In one embodiment the by-pass includes in seriatim cold, regenerator, and hot chambers. In another embodiment the heating and/or cooli...

A contamination free surgical evacuator comprising an evacuator bag having valves in the input (drain) and the output (purge) lines leading to and from the bag is disclosed. The drain valve is a one-way flap valve that allows fluids to enter the bag from a patient yet prevents fluids from returning to the patient. The purge valve is a one-way magnetic valve that allows drained fluids to be purged from the evacuator bag without allowing contaminants to enter the bag. The evacuator bag is collapsi...

A free form cushion assembly adaptable for selective arrangement in plural operative configurations and especially suitable for use on a beach, patio, lawn or recreational area. The assembly includes articulated cushion segments detachably hinged together to provide pivotal independent movement for each segment. The segments can be vertically stacked for use as a hassock, arranged horizontally on a planar surface to form a bed, or alternately positioned in various other combinations to form a ch...

Disclosed herein is an invention directed to a method of deasphalting in which a desired amount of asphalt is removed by adjusting the solvent power of the solvent-feed system to obtain a desired cotangent theta for the system. Also disclosed is the application of the cotangent theta principle to two-stage deasphalting of Athabasca bitumen.