Title: Drill mast support assembly

Abstract: A drill mast support assembly having a drill mast pivotable between a drilling and a non-drilling position and including elongated rigid brace means for stabilizing the mast in the drilling position. The brace means are connected to the mast by support means which provide for a compact assembly when the mast in the non-drilling position and permit the brace means to be automatically positioned as the drill mast is moved to the drilling position. Lock means are further provided for preventing relative movement between the mast and the brace means when the mast is in the drilling position.

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Inventors: Loftis, James B. (Remlap, AL, US)

Application Number: 562175
Filing Date: 1975-03-26
Publication_date: 1976-06-29
Assignee: Joy Manufacturing Company (Pittsburgh, PA)
Primary Class(es): 52/115 52/116, 173/26, 173/44
Other Classes:
US Patent Ref:

2849212	Aug, 1958	Robbins	173/28.
2904310	Sep, 1959	Leonard	173/28.
3012619	Dec, 1961	Farque	173/28.
3252527	May, 1966	Alexander et al.	173/41.
3778940	Dec, 1973	Blecken	52/116.
3805463	Apr, 1974	Lang et al.	173/28.
3815690	Jun, 1974	Cooper	173/44.

Other Refs:
Primary Examiner: Purser, Ernest R.
Assistant Examiner:
Attorney: