Search patents:
Folding portable gin pole
Folding portable gin pole
Filed: February 7th, 1949 [Granted]
Patent Number: US2557192A
June l9, 1951 G, D, ESTER 2,557,192. FOLDING PORTABLE GIN POLE Filed Feb. '7, 1949 /4 Y INVENTOR. 49 GROVER 0. LE/STER 4o I BY Patented June F3, ...
Portable gin pole
Portable gin pole
Filed: September 22nd, 1936 [Granted]
Patent Number: US2128712A
PORTABLE GIN POLE 1 Filed Sept. 22, 1956 s Sheets-Sheet 4 1 2 x3 24 g0 22 29 I" 5 1W l I Z l 3 I j /5 r I l l l l 5 j l --I Li- Aug. 30, 1938. A. J. NEFF PORTABLE ...
Portable gin pole structure
Portable gin pole structure
Filed: May 1st, 1929 [Granted]
Patent Number: US1828973A
1931- G. D. LEISTER PORTABLE GIN POLE STRUCTURE Filed May 1. 1929 IVIENTOR BY W W A TTORNE Y Patent d Oct. 27, 1931 ATENT OFFICE onovnnn .
Portable oil well derrick
Portable oil well derrick
Filed: February 3rd, 1954 [Granted]
Patent Number: US2863530A
(Cl. 189-l1) This invention relates to portable oil well derricks, and more particularly to those that are swung up to upright position with the help of a gin pole.
Portable oil well derrick
Portable oil well derrick
Filed: January 9th, 1952 [Granted]
Patent Number: US2656023A
3 is an enlarged fragmentary rear view of the upper portion of the gin pole and the ... A splice connection for a portable oil well derrick that has a gin pole and a ...
Oil well mast gin pole
Oil well mast gin pole
Filed: October 9th, 1953 [Granted]
Patent Number: US2780325A
18s-16) This invention relates Ito the gin poles that are used in raising and supporting portable oil well masts, and more particularly to the way in which the gin ...
Oil well mast gin pole
Oil well mast gin pole
Filed: November 27th, 1953 [Granted]
Patent Number: US2780326A
(Cl. 18916) This invention relates to upwardly tapered gin poles that areused in raising and lowering portable oil well masts, and more particularly to those that ...
Folding gin pole
Folding gin pole
Filed: March 12th, 1954 [Granted]
Patent Number: US2843229A
FOLDING GIN POLE 7 Filed March 12, .1954 s Sheets-Sheet 1 IN V EN TOR-3 .... A portable oil well derrick comprising a base, drawworks on the base having a ...