Preload headboard for an elongate prop

Details Preload headboard for an elongate prop Preload headboard for an elongate prop

1992-12-18

1994-02-22

Corbin, David H.

Hydraulic and earth engineering

Earth treatment or control

Shoring, bracing, or cave-in prevention

405289, 4053021, E21D 1555

Patent

active

052881784

ABSTRACT:
The invention concerns a prop headboard (10) which is used in conjunction with an elongate mine prop. The headboard supports a preload bag (50) inflatable with a settable grout. The headboard is composed of a headboard member (12) and a pot (34). The headboard member includes a pressed steel sheet (14) having relatively higher end regions (16) and a relatively lower central region (22). The central region is formed with an opening (24). The headboard member also has bag retaining formations (30) which receive opposite ends of a preload bag located on the headboard member. The pot is engaged in the opening in the central region and receives the upper end of an elongate prop, thus supporting the headboard member on the prop with the headboard member extending transversely to the prop.

REFERENCES:
patent: 412693 (1978-09-01), Collin et al.
patent: 3224202 (1965-12-01), Durget
patent: 3521454 (1970-07-01), Dodds
patent: 4465405 (1984-08-01), Durfeld
patent: 5149228 (1992-09-01), Pienaar et al.

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