Patent AU-2018241088-B2 (AU)
Title: Compensated elevator link
Inventor: CREE DAVID
IPC: E21B19/09
Filed: 2018-05-19
Granted: 2020-12-03
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) 
(19) World Intellectual Property 
(1) Organization I~I~~~DDDIIDIIDDDIIDIIIDI~~~DD~I 
International Bureau (10) International Publication Number 
(43) International Publication Date W O 2018/209407 Al 
22 November 2018 (22.11.2018) W IPO I PCT 
(51) International Patent Classification: el 7, 731 Hay Street, Perth, Western Australia 6000 (AU).  
E21B 19/09 (2006.01) B66C 13/10 (2006.01) SEMMENS, Kayne; Level 7, 731 Hay Street, Perth, West
(21) International Application Number: em Australia 6000 (AU).  
PCT/AU2018/050481 (74) Agent: IP SENTINELS PATENT AND TRADEMARK 
(22) International Filing Date: ATTORNEYS; PO Box 1006 Bentley DC, 
Perth, Western 
19 May 2018 (19.05.2018) Australia 6983 (AU).  
(25) Filing Language: English (81) Designated States (unless otherwise 
indicated, for every 
kind of national protection available): AE, AG, AL, AM, 
(26) Publication Language: English AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, 
.30) .riority DatCA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, 
(30) Priority Data: DZ, EC, EE, EG, ES, Fl, GB, GD, GE, GH, GM, GT, HN, 
2017901910 19May2017(19.05.2017) AU HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, 
(71) Applicant: AME PTY LTD [AU/AU]; Level 7, 731 Hay KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, 
Street, Perth, Western Australia 6000 (AU). MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, 
(72) Inventors: CREE, David; Level 7, 731 Hay Street, Perth, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, 
RU, RW, SA, 
Western Australia 6000 (AU). WRIGHT, Jonathan; Lev
(54) Title: COMPENSATED ELEVATOR LINK 
I0 7rS 
P2 
- 2b 
(57) Abstract: A compensated elevator link is disclosed. In at least one aspect, the compensated elevator link comprises a plurality of 
cylinder housings and a rod having a plurality of ends, each end comprising a piston head adapted to be slideably received within one 
of the cylinder housings for defining first and second hydraulic cylinders. Each hydraulic cylinder has at least one annulus for receiving 
a non-compressible fluid. The rod comprises a passage for receiving a compressible fluid, wherein each piston head comprises at least 
one passage to allow selective displacement of the non-compressible fluid between the annulus of the cylinder housing and the passage 
within the rod during selective displacement of the hydraulic cylinders between a contracted condition to an extended condition for 
either compression or expansion of the compressible fluid by the non-compressible fluid.
W O 2018/209407 A209407Al||||||||||||||||||||||||||||||||||||||||||||||||||||||| 
SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, 
TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.  
(84) Designated States (unless otherwise indicated, for every 
kind of regional protection available): ARIPO (BW, GH, 
GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, 
UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, 
TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, 
EE, ES, Fl, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, 
MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, 
TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, 
KM, ML, MR, NE, SN, TD, TG).  
Published: 
- with international search report (Art. 21(3))