John Lee Olson
Dentist at 39, Portland, OR

4205938, Jun 3, 1980

Oct 26, 1978

5/954894

John E. Olson - Portland OR

Cascade Corporation - Portland OR

B60P 118

414497

A load push-pull assembly for a lift truck having a main frame and a tiltable load-supporting frame. The push-pull assembly comprises a push frame connected by a selectively extensible and retractable linkage to a rear mounting frame which does not tilt in unison with the tiltable load-supporting frame but rather maintains a constant angular attitude with respect to the truck-supporting surface regardless of the tilting attitude of the load-supporting frame. The linkage maintains the push frame in a constant angular attitude with respect to the rear mounting frame such that the push frame is maintained perpendicular with respect to the truck-supporting surface during the tilting of the load-supporting frame. The push frame is freely movable vertically with respect to the rear mounting frame, and is supported vertically by the tiltable load-supporting frame, such that it moves vertically with a rectilinear motion in response to the tilting movement of the load-supporting frame without changing its angular attitude with respect to the truck-supporting surface. A slip sheet clamp is mounted on the bottom of the push frame such that both jaws of the clamp move vertically in unison with the vertical movement of the push frame.

4605255, Aug 12, 1986

Dec 4, 1984

6/677929

John E. Olson - Portland OR

Cascade Corporation - Portland OR

B66C 166

294 6733

A carton clamp having a frame adapted to be mounted on a materials-handling machine, especially an automatically guided vehicle, includes clamp arms coupled directly together, independently of the frame, by motor-driven screw-type linear actuators which selectively open and close the arms. A centering assembly coupled to each clamp arm corrects for any imbalance of clamp arm speeds relative to the frame which may occur due to the fact that the screw actuators are free to move relative to the frame. The direct interconnection of the clamp arms by the screw actuators effectively doubles the clamping force which would otherwise be obtainable if the actuators were fixed to the frame.

4274794, Jun 23, 1981

Oct 29, 1979

6/088751

John E. Olson - Portland OR

Cascade Corporation - Portland OR

B66F 914

414663

A mobile lift truck for handling unpalletized loads comprising a tiltable load-carrying platform projecting forwardly from the main frame of the truck rotatably mounted so as to permit rotation of the platform about a generally vertical axis of rotation between respective rotatable positions substantially 90. degree. apart. A forwardly-facing push-pull frame having a slip sheet clamp is provided which does not rotate in unison with the platform, enabling the push frame to push loads forwardly off of the platform in both of the rotatable positions of the platform. Power-actuating circuitry is provided interconnecting the platform rotation function, push frame retraction function and slip sheet clamp release function so that the platform is prevented from rotating until the slip sheet clamp has been released and the push frame has been retracted off of the platform. Methods of application of the lift truck are also disclosed.

4927320, May 22, 1990

Jul 14, 1989

7/379821

John E. Olson - Portland OR

Cascade Corporation - Portland OR

B66F 920

414786

A load push-pull slipsheet handler is disclosed having automatic features adapting it particularly for use with driverless, automatically-guided vehicles. These features include proximity sensors which sense the distance between the slipsheet handler and a vertically-oriented external surface so as to deposit a load in a predetermined relationship to the surface either on the floor or atop another load. Load contact sensors also are provided for enabling the device to gauge the distance to a load to be picked up so as to control the approach thereto. Further sensors sense the transversely-opposite extremities of a load prior to engagement, and transversely center the push-pull assembly relative to the load. Other features include a system associated with the slipsheet clamp for sensing the presence or absence of a slipsheet tab prior to clamping, and a device for permanently deforming the tab to facilitate subsequent regrasping after the load has been deposited. A vertical heght sensor ensures proper elevation of the slipsheet handler for depositing a load atop another load.

4726729, Feb 23, 1988

May 2, 1986

6/859062

John E. Olson - Portland OR
Donald E. Van Beek - Oregon City OR

Cascade Corporation - Portland OR

B25J 1502

414621

An electric motor-actuated load clamp for automatically-guided vehicles has clamp arms which are selectively opened and closed by a plurality of rotary electric motors connected to the clamp arms by ball screws. Clamping force is accurately controlled by regulation of current to the electric motors, any of a number of different predetermined clamping forces being selectively obtainable. During clamping of a load, the electric motors are energized only a small fraction of the time according to a time-sequenced clamping and reclamping procedure, clamping force being otherwise maintained by a one-way brake. Further control features ensure against inaccuracy and overclamping due to current in-rush, and against malfunctions which could cause safety hazards.

4008875, Feb 22, 1977

Jan 2, 1976

5/646401

John E. Olson - Portland OR
Richard D. Seaberg - Vancouver WA

Cascade Corporation - Portland OR

F15B 1306

251 634

A fluid control valve which operates accurately in response to the pressure difference that exists between a pair of ports in the valve. The valve features a spool which is normally biased to one control position wherein it remains with the sensed pressure difference being below one preselected amount. The spool shifts rapidly to another control position on the sensed pressure difference exceeding this amount. In this other control position, the spool remains until the sensed pressure difference drops to another preselected amount which is significantly lower than the first-mentioned preselected amount. On this latter event occurring, the spool returns to its first-mentioned control position.

4714399, Dec 22, 1987

May 2, 1986

6/859063

John E. Olson - Portland OR

Cascade Corporation - Portland OR

B66F 900, B66F 906

414621

An automatically-guided, driverless vehicle for handling loads has a selectively openable and closeable load clamp. The clamp is equipped with various sensors for automatically sensing the load and other objects and surfaces surrounding the load, and controlling the movement of the clamp along a load-engaging direction, the vertical reciprocation of the clamp, and the opening and the closing of the clamp in response thereto.

4284384, Aug 18, 1981

Mar 3, 1980

6/126440

John E. Olson - Portland OR

Cascade Corporation - Portland OR

B66F 922, B66F 924

414434

An apparatus for a lift truck, of the type equipped with a push frame, for extending the push frame at a predetermined speed of extension with respect to the lift truck while simultaneously causing the lift truck to move rearwardly at a predetermined reverse speed equal to the speed of extension of the push frame so as to deposit a load in a predetermined position. The apparatus is actuated automatically in response to extension of the push frame.

4041839, Aug 16, 1977

Nov 24, 1975

5/634422

John E. Olson - Portland OR

Cascade Corporation - Portland OR

F01B 1502

91189R

A multistage, extensible-contractible hydraulic ram assembly for use in conjunction with a triple-lift-type mast in a lift truck. The assembly is designed for mounting in such a truck in a so-called inverted position. It is constructed with special, externally actuated, internal valving which, through controlling the action of pressure fluid within the assembly, assures positive control over the sequence of movements of the sections in a mast as such are raised and lowered, without requiring latching and interlocking of these sections. Further, the assembly features the capability of producing substantially uniform or constant lifting and lowering speeds for a load which is carried on the usual carriage mounted on a mast of the type indicated.