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US 5,245,877 AGranted
Tong load cell assembly
AssigneeWeatherford U.S., Inc.
InventorGraham M. Ruark
Life of this patent
Estimating the term…
Abstract
An apparatus and method including a load cell mounting apparatus movably mounted on a load cell which applies either of two types of loads to the load cell as one type of load. The apparatus and method for applying either a tensile load or a compressive load to a load cell as a tensile load; and a tong assembly with such apparatus or in another aspect, for applying either a tensile load or a compressive load to a load cell as a compressive load; and, a tong assembly with such apparatus.
Claims9
A load cell assembly comprising
- a load cell for indicating a tensile load thereon,
- load cell mounting apparatus movably mounted on the load cell and movable with respect to the load cell,
- the load cell mounting apparatus applying a tensile load imposed on the load cell mounting apparatus to the load cell as a tensile load, and applying a compressive load imposed on the load cell mounting apparatus to the load cell as a tensile load.
A load cell assembly comprising
- a load cell for indicating a compressive load thereon,
- load cell mounting apparatus movable mounted on the load and movable with respect to the load cell,
- the load cell mounting apparatus applying a tensile load imposed on the load cell mounting apparatus to the load cell as a compressive load, and applying a compressive load imposed on the load cell mounting apparatus to the load cell as a compressive load
- the load cell assembly further comprising
- an outer bracket connectible to a load-indicating device, the outer bracket having first outer holes therein for receiving and holding a first rod secured to a first end of the load cell and having second outer holes therein for receiving and co-acting with a second rod secured to a second end of the load cell, the holes spaced apart from each other,
- an inner bracket disposed partially within the outer bracket and connectible to a load-inducing device, the inner bracket having second inner holes therein for receiving and holding the second rod and having first inner holes for receiving and co-acting with the first rod, and
- the inner bracket disposed partially within the outer bracket and the load cell connected to the rods so that either a tensile load or a compressive load applied to the load cell assembly is applied to the load cell as a compressive load.
4 more elements
A tong assembly comprising
- a lead power tong,
- a back-up tong,
- a load cell assembly interconnected between the tongs, the load cell assembly comprising
- a load cell for indicating a tensile load thereon,
- load cell mounting apparatus movably mounted on the load cell and movable with respect to the load cell,
- the load cell mounting apparatus applying a tensile load imposed on the load cell assembly by either of the tongs as a tensile load on the load cell, and the load cell mounting apparatus applying a compressive load imposed on the load cell assembly by either of the tongs as a tensile load on the load cell.
3 more elements
Dependencies are inferred from the claim text.