John D Grove

US Patent:

41320409, Jan 2, 1979

Filed:

May 12, 1977

Appl. No.:

5/796381

Inventors:

John L. Grove - Greencastle PA

Assignee:

JLG Industries, Inc. - McConnellsburg PA

International Classification:

B66C 2304

US Classification:

52115

Abstract:

A lifting boom having three telescopic sections. A hydraulic ram has the piston rod free end connected by a horizontal pin movable in guide slots at the rear of the base section. A deflection limiter is axially slidable on the piston rod, and is less high then the base section. The rear of the ram cylinder is pin connected by horizontal pins to the mid section, and has a transverse ram cylinder plate attached to it. Pull rods are connected to the deflection limiter and pass forwardly through the transverse plate, having detents at their forward ends beyond the transverse plates. A pair of chains extends from the base section forward and around sprockets at the rear of the mid section, being attached to the rear of the fly section, a further chain extending thence forwardly and around a sprocket on the front end of the ram cylinder, and thence rearwardly to an anchor on the base section; the ram sprocket has a roller portion which rolls on the fly section bottom plate to support the ram cylinder. The heel of the fly section raises the ram forward end when the boom is extended and the sections are cocked or arched, limited by the roller engaging the bottom of the fly section top plate.

US Patent:

43312152, May 25, 1982

Filed:

Feb 12, 1980

Appl. No.:

6/120882

Inventors:

John L. Grove - Greencastle PA
Ernest J. Merz - Chambersburg PA
Charles W. Walters - Waynesboro PA

Assignee:

JLG Industries, Inc. - McConnellsburg PA

International Classification:

B66F 1104
G05G 100

US Classification:

182 2

Abstract:

Controls for an aerial lift platform apparatus which has a steerable mobile chassis, a rotatable upper works, and an extensible boom pivoted on the upper works for luffing movement. The controls are grouped to provide a first group of control members in physical proximity to each other for controlling upper works movement and a second group of control members for controlling movement of the chassis. Each of these control members is mounted for movement substantially to simulate the movement which is controlled. A third group of control members is for controlling the engine, and are in physical proximity to each other. The control members are mounted on a control console having near-horizontal and near-vertical surfaces from which the control members extend, the vehicle control member for drive and steering extending upwardly from the near-horizontal surface.

US Patent:

D2512394, Mar 6, 1979

Filed:

May 12, 1977

Appl. No.:

5/796294

Inventors:

John L. Grove - Greencastle PA

Assignee:

JLG Industries, Inc. - McConnellsburg PA

International Classification:

D1205

US Classification:

D12 56

US Patent:

42168694, Aug 12, 1980

Filed:

Sep 21, 1977

Appl. No.:

5/835195

Inventors:

John L. Grove - Greencastle PA

Assignee:

JLG Industries, Inc. - McConnellsburg PA

International Classification:

B66C 2306

US Classification:

212165

Abstract:

An industrial crane has a chassis with a housing mounted on the chassis having a flat, horizontal deck with a central well providing access to a bearing for a rotatable upper works, the bearing being centered on the chassis. The upper works has a portion extending into the well to the bearing. The chassis is supported by four wheels, two of which are on an oscillating axle. The wheels are one size, and extend above the chassis which is between them. The upper works includes a cab, directly over the bearing, a boom support rearwardly of the cab, an engine rearwardly of the boom support, and a lifting boom journalled to the boom support rearwardly of the cab and extending forwardly over the cab. The boom is lifted by a lift cylinder rearwardly of the cab. The boom and the cab, as well as the engine, have their lateral centers in line, along the median plane of the upper works, and the upper works median plane coincides with the chassis median plane when the upper works is forward or rearward.

US Patent:

42732140, Jun 16, 1981

Filed:

Feb 28, 1977

Appl. No.:

5/772812

Inventors:

John L. Grove - Greencastle PA

Assignee:

JLG Industries, Inc. - McConnellsburg PA

International Classification:

B66F 1104

US Classification:

182 2

Abstract:

An aerial lift platform apparatus having tracks. A rotatable upper works is mounted on a chassis, and includes a turntable, a telescopic boom having a workman's platform at its outer end, and an engine driving a hydraulic pump. The chassis has forward and rear drive wheels on each side, and two pairs of intermediate idler wheels. Each pair of idler wheels is supported by a spring biased cranked axle which is journalled in bearings, to effect joint movement of the two wheels of the pair. All wheels have pneumatic tires and a track encompasses the tires on each side.

US Patent:

42368618, Dec 2, 1980

Filed:

Sep 25, 1978

Appl. No.:

5/945325

Inventors:

John L. Grove - Greencastle PA

Assignee:

JLG Industries, Inc. - McConnellsburg PA

International Classification:

B66F 1104

US Classification:

414540

Abstract:

A vehicle has a mobile, self-propelled chassis with a platform extendable upwardly by a motor and scissors linkage. A lever is pivotally connected to the chassis and has pipe grabs on the free end; the lever is raised to deposit a pipe on rails on the platform. A vertical hydraulic motor on the platform has saddles for lifting a pipe from the rail to a higher elevation.

US Patent:

D2512408, Mar 6, 1979

Filed:

Sep 15, 1977

Appl. No.:

5/833412

Inventors:

John L. Grove - Greencastle PA

Assignee:

JLG Industries, Inc. - McConnellsburg PA

International Classification:

D1205

US Classification:

D12 57

US Patent:

D2512424, Mar 6, 1979

Filed:

May 12, 1977

Appl. No.:

5/796436

Inventors:

John L. Grove - Greencastle PA

Assignee:

JLG Industries, Inc. - McConnellsburg PA

International Classification:

D1205

US Classification:

D12 61