Versatile roof bolt assembly

Patent · Tue Nov 03 04:00:00 EST 1987

OSTI ID:5702664

Hipkins, Sr, E C; Locotos, F M

In an anchor bolt assembly of the type used in mine roofs and the like in which the anchor bolt assembly is positioned in a bore hole of a rock formation, where the bolt assembly includes an elongated bolt shaft with an upper end and with a head on a lower end, wherein a quick-setting resin cartridge is positioned in the bore hole above the upper end of the bolt shaft, and wherein the anchor bolt assembly is secured to the rock formation by at least the quick-setting resin, the improvement is described comprising an entrant plug provided at the upper end of the bolt shaft and adapted to rupture the resin cartridge and an elongated helical coil external of and surrounding the bolt shaft. It has a direction of coil for mixing the quick-setting resin and urging the quick-setting resin upwardly toward the upper end while the bolt shaft is rotated in one continuous direction. The helical coil is disposed below the entrant plug and connected to the entrant plug or the bolt shaft and extending a substantial length along the bolt shaft to achieve the mixing.

• Assignee: H and S Machine and Supply Co., Inc., Coroapolis, F.M. Locotos Co., Inc., Pittsburgh, PA
• Patent Number(s): US 4703053
• OSTI ID: 5702664
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012031* -- Coal
Lignite
& Peat-- Underground Mining-- Strata Mechanics & Control-- (1987-)
COAL MINING
DESIGN
EQUIPMENT
FASTENERS
MACHINE PARTS
MINING
MINING EQUIPMENT
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
RESINS
ROCK-FLUID INTERACTIONS
ROOF BOLTS
SEALS
SHAFTS
STRATA CONTROL
UNDERGROUND MINING