Cascade Corporation

Harry F Weinert

Stanley E Farmer

Donald M Faust

David W Petronek

Dennis W Gaibler

David J Weisgerber

Larry D McCart

Troy J Schweitzer

A lift truck fork positioner for respective inner and outer pairs of load-handling forks includes power actuators for selectively extending and retracting the outer pair of forks and latch assemblies for selectively detachably connecting an inner fork fixedly to a respective adjacent outer fork in spaced relation thereto automatically in response to the extension of the outer forks beyond a predetermined inner range of extension. Each latch assembly, when connecting the inner fork to the outer fork, fixedly prevents any narrowing of the spacing between the interconnected inner and outer forks, as well as fixedly preventing any widening of such spacing.

Multiple-pair fork positioner

A parallel arm clamp assembly having longitudinally-movable elongate slide members mountable transversely on the front of a lift truck and attaching members for connecting relatively narrow opposing clamp arms to the ends of the slide members so as to extend perpendicular thereto. Each slide member has an elongate rear portion longitudinally mounted within a slide guide and a longitudinally-extending elongate front portion external of the respective guide protruding forwardly therefrom, the elongate front portions of the respective slide members intersecting a common plane extending vertically and longitudinally with respect to the slide members. The clamp arm attaching members each have a pair of legs formed monolithically and homogeneously into a single member with the legs oriented at substantially a 90.degree. angle with respect to each other. One leg of each such member is connected in end-to-end abutment with a respective end surface of a respective front portion of a slide member so as to also intersect the aforesaid common plane. The second leg of each attaching member protrudes forwardly from the first leg and is adapted for end-to-end abutment with the rear edge of a respective clamp arm.

Parallel arm clamp having improved attaching assembly for narrow clamp

A paper roll-handling clamp for lift trucks of the pivoted arm type. The pivoting movement of the clamp arms with respect to one another to perform the clamping function is accomplished by use of a generally forwardly extending, selectively extensible and retractible multi-stage telescoping hydraulic piston and cylinder assembly, which gives the clamp arms an exceptionally wide range of motion.

Lift truck load clamp for handling paper rolls

A selectively rotatable load clamp for lift trucks, having a pair of openable and closable clamp arms. The clamp arms are capable of shifting the position of a load relative to the lift truck by movement of the clamp arms in unison, by which the load may be moved relative to the lift truck between a position of equal extension, wherein the forward ends of the clamp arms extend a substantially equal distance forwardly of the lift truck, and a position of unequal extension wherein the forward end of one clamp arm extends a greater distance forwardly than the forward end of the other clamp arm. The fluid motor apparatus for accomplishing such shifting function is selectively actuatable only in certain predetermined rotation positions of the clamp, that is, those positions where the two clamp arms are disposed at substantially a 45.degree. angle relative to horizontal. A valve assembly responsive to the rotational position of the clamp permits the selective actuation of the shifting function in such position, while preventing the selective opening or closing of the clamp arms. Conversely, when the clamp arms are placed either one above the other or side-by-side, the selective opening or closing of the arms is permitted while the actuation of the shifting function is prevented.

Rotatable load clamp adapted for selective load positioning in response

A side shifter mountable on a conventional hook-type lift truck carriage. The shifter includes an upper hook which, through removable wear shoes, accommodates a sliding engagement between the shifter and the upper bar in such a carriage, and a rotary spherical-segment bearing disposed below the hook which accommodates a rolling point contact with the lower bar in such a carriage.

Slider roller side shifter for use on a forklift truck

A lift truck-mounted load clamp for handling paper rolls having selectively openable and closeable opposing clamp arms with elongate, arcuate, concave contact pads hingedly connected to the forward ends of the respective clamp arms. Each contact pad is provided with exceptionally compact, durable restraints which limit the hinged movement of the respective pad, such restraints each comprising a cable having a swaged-on eye at one end pivotally connected to the contact pad and a swaged-on ferrule at the other end which is slidably contained within a yoke mounted on the clamp arm. A pair of such restraints are provided for each respective contact pad, the restraints being located exterior of each longitudinal edge of the clamp arm rather than interior thereof. A specially formed, heat-treated protective casting is provided on the rear surface of each contact pad which prevents wear and resultant weakening of the hinge joint of each pad, while also preventing wear and weakening of the tips of the pad, and provides an exceptionally durable and strong connection between the respective restraints and the pad.

Lift truck paper roll clamp having improved contact pad restraint and

A paper roll-handling clamp for lift trucks of the pivoted arm type capable of clamping a paper roll and shifting the position of the roll relative to the lift truck between a position of equal extension, wherein the forward ends of the clamp arms extend a substantially equal distance forwardly of the lift truck, and a position of unequal extension wherein the forward end of one clamp arm extends a greater distance forwardly than the forward end of the other clamp arm. The shifting movement of the clamp arms in unison occurs about a first transverse pivot axis, while the pivoting of the clamp arms with respect to one another to perform the clamping function occurs about a second transverse pivot axis located a spaced distance away from the first pivot axis and movable with respect thereto. The employment of the two separate pivot axes for the shifting function and the clamping function respectively enables the center of the paper roll to be placed very close to the longitudinal centerline of the lift truck and axis of rotation of the clamp when the clamp is in the position of equal extension, despite the fact that the first pivot axis about which the shifting movement occurs is offset transversely by a substantial distance from the truck centerline and axis of rotation, and enables the center of the roll to be offset advantageously from the centerline and axis of rotation in the unequal extension position.

A single-acting, three-stage, four-section telescopic ram for use in conjunction with a triple-lift type mast in a lift truck. The ram features an extremely low overall length when fully contracted, thus affording good operator visibility. The ram also is capable of producing surprisingly 'high-lift' despite its low contracted profile. Further, the ram features an internal construction that produces constant lifting and lowering speeds for a load, as well as providing for positive control over the sequence of movements of parts in and on an associated mast.

Growing community of inventors

Portland, OR, United States of America

Harry F Weinert