OpenTechnical
This is a record of a document published elsewhere, first published by the United States Patent and Trademark Office, as US-5330242-A, on 19 July 1994. OpenTechnical did not first disclose it. The identifier, hashes and timestamps below record what this library served and when, not when the material became public. View the original.

OT-2026-000003342

Rotatable hydraulic grapple

Published
Permanent URL
Classification
Lifting, Positioning & Manipulation › Hoists and Cranes
Assignee
LUCKY SR BOBBY D
Original source
US-5330242-A, the United States Patent and Trademark Office, 19 July 1994
Document SHA-256
98b012acff3a03706ffc8861099e743ddb2a123b9e1713406a36392d48ef0d92

A rotatable hydraulic grapple apparatus comprises a yoke assembly having attached to it a hydraulic motor and having within it a channel. A housing is rotatably connected to the yoke assembly and is capable of being rotated by movement of the hydraulic motor. The housing is centered along the longitudinal axis of the yoke assembly such that the longitudinal axes of both the yoke assembly and the housing are collinear. The channel in the yoke assembly communicates with a manifold in the housing. The housing has rigidly attached to it a plurality of chambers, each chamber containing an hydraulic actuator rigidly attached within the chamber. Attached to each hydraulic actuator is a grapple tine. A pressurized fluid supply provides fluid to the yoke assembly channel which communicates the fluid to the housing manifold. The fluid is then communicated from the manifold to each actuator for movement of the actuator which in turn moves the grapple tines. The housing and chambers completely enclose the actuators and the fluid supply to the actuators so that no cavities or fluid lines are exposed to the operating environment of the grapple. The walls of the housing are interconnected in a way which provides greater rigidity to the structure over the prior art.

Sheet 1
Sheet 1
Sheet 2
Sheet 2
Sheet 3
Sheet 3
Sheet 4
Sheet 4
Sheet 5
Sheet 5
Sheet 6
Sheet 6
Sheet 7
Sheet 7

Abstract

A rotatable hydraulic grapple apparatus comprises a yoke assembly having attached to it a hydraulic motor and having within it a channel. A housing is rotatably connected to the yoke assembly and is capable of being rotated by movement of the hydraulic motor. The housing is centered along the longitudinal axis of the yoke assembly such that the longitudinal axes of both the yoke assembly and the housing are collinear. The channel in the yoke assembly communicates with a manifold in the housing. The housing has rigidly attached to it a plurality of chambers, each chamber containing an hydraulic actuator rigidly attached within the chamber. Attached to each hydraulic actuator is a grapple tine. A pressurized fluid supply provides fluid to the yoke assembly channel which communicates the fluid to the housing manifold. The fluid is then communicated from the manifold to each actuator for movement of the actuator which in turn moves the grapple tines. The housing and chambers completely enclose the actuators and the fluid supply to the actuators so that no cavities or fluid lines are exposed to the operating environment of the grapple. The walls of the housing are interconnected in a way which provides greater rigidity to the structure over the prior art.

1. Drawings

[0001]Sheet 1.

[0002]Sheet 2.

[0003]Sheet 3.

[0004]Sheet 4.

[0005]Sheet 5.

[0006]Sheet 6.

[0007]Sheet 7.

Publication information

Plain textMarkdownManifestIntegrity record

Citation

OpenTechnical Publication OT-2026-000003342, “Rotatable hydraulic grapple,” published September 15, 2026 at 20:12:53 UTC, https://opentechnical.org/p/OT-2026-000003342.

To cite specific content, add the paragraph or figure numbers.

Terms

This record reproduces a document published elsewhere and is provided for reference and study. Rights in the original remain with its owner. See the publication policy.