SG11201803857RA - Piston-chamber combination - Google Patents

Abstract

INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property -' Organization International Bureau ires.. 00) (43) International Publication Date ..... ..sr ,„„ol 1 June 2017 (01.06.2017) WIPO I PCT (10) WO International 111111111111311111111111111111111111111111111111111111111111111111111111111111111111111111 2017/089852 Publication Al Number (51) International Patent Classification: BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, F16J 3/06 (2006.01) F16J 10/00 (2006.01) DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, FO4B 53/14 (2006.01) Fl 5B 15/14 (2006.01) HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KN, KP, KR, F16F 9/48 (2006.01) KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, (21) International Application Number: PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, PCT/IB2015/002212 SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, (22) International Filing Date: TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. 24 November 2015 (24.11.2015) (84) Designated States (unless otherwise indicated, for every (25) Filing Language: English kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, (26) Publication Language: English TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, (71) Applicant: NVB PROPULSION INTERNATIONAL TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, LTD [GB/GB]; 1st. Fl. West Wing, Davidson House, For- DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, bury Square, Reading, Berkshire RG1 3EU (GB). 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, (72) Inventor; and GW, KM, ML, MR, NE, SN, TD, TG). (71) Applicant : VAN DER BLOM, Nicolaas [NL/CH]; Postlagernd, CH-6314 Unterageri (CH). Published: (81) Designated States (unless otherwise indicated, for every with international search report (Art 21(3)) kind of national protection available): AE, AG, AL, AM, — with amended claims (Art 19(1)) AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, (54) Title: PISTON-CHAMBER COMBINATION 1 W 14 27 10 I t A 13 1 1 &Tem --• ji 4 fl fl 0 OIL 2 9 8 i 0 0 2 15 4 5 7 2 37 1 1 , 0 0111 rlib 6 A1 38 l 9 ► 111 lir 6 1 Fi • .58 FLAS 50 49 h X Fig . 1 1 .1 (57) : A piston-chamber combination comprising a chamber (1) which is bounded by an inner chamber wall (4), and com- .4! prising a piston (1) in said chamber (2) to be engagingly movable relative to said chamber wall (4) at least between a first position and a second position of the chamber (2), said chamber (2) having cross-sections of different cross-sectional areas and differing cir- ri in cumferential lengths at the first and second longitudinal positions, and at least substantially continuously different cross-sectional GC areas and circumferential lengths at intermediate longitudinal positions between the first and second longitudinal positions, the CP\ cross-sectional area and circumferential length at said second longitudinal position being smaller than the cross-sectional area and Ia n ) circumferential length at said first longitudinal position, said piston (1) is comprising an member (12) for suspension of the sealing - C (8, 9), said member (12) is rotatable, and said sealing (8, 9) is comprising a separate part (6, 6') engaging the wall (4) of said cham - IN ber (2) and a sealing (8, 9) made of elastically defoimable impervious material, and mounted on the piston rod (5). This is achieved c:::, by the piston (1) is produced to have a production-size of said separate part (6') and said sealing (8, 9) in the stress-free and unde - N foiined state thereof in which the circumferential length of the piston (1) is approximately equivalent to the circumferential length of 0 said chamber wall (4) at said second longitudinal position, the piston (1) being expandable from its production size in a direction transversally with respect to the longitudinal [Continued on next page] WO 2017/089852 Al MIONIMOREMIMOIDEEDIREHEIMEIDEMEHOIS / circular direction of the chamber (2) thereby providing for an expansion of sealing (7) of the piston (1) from the production size thereof during the relative movements of the piston from said second longitudinal position to said first longitudinal / circular posi - tion, one end, closest to a second longitudinal / circular position of the chamber, the sealing (7, 7') is embedded in a separate part (6, 6'), said sealing (8,9) of the piston (1) is comprising sealing sections (19, 20; 51, 51') in a direction along the piston rod (5), said sealing (7) is updivided in said sections over the circumference of said sealing (7), and, the angle (6;) in-between two adja- cent sealing sections is much less than 180°, one other end, closest to a first longitudinal / circular position of the chamber, said sealing (7) is updivided updivided in said sections over the circumference of said sealing (7), and, the angle (8;y) in- between two adjacent sealing sections is bigger than said angle (6;).