US 12,454,968 B1
Secured gland for fluid-powered cylinder
Christopher Larew, Newburg, WV (US); and Naveen Koka, Oakdale, PA (US)
Filed by Swanson Industries, Inc., Morgantown, WV (US)
Filed on Jul. 16, 2024, as Appl. No. 18/774,901.
Int. Cl. F15B 15/14 (2006.01)
CPC F15B 15/1461 (2013.01) 20 Claims
OG exemplary drawing
 
1. A hydraulic cylinder having a secured sealing gland, comprising:
a hydraulic cylinder barrel having a first end, a second end, a cross-section, an outer surface, and an axial inner surface, the axial inner surface threaded with square threads at the second end;
a barrel sealing gland having an axial body with an outer surface, a lip that extends axially out from the body, and an orifice extending axially through the axial body of the barrel sealing gland forming an inner surface of the barrel sealing gland, the barrel sealing gland having square threads on the outer surface of the barrel sealing gland body, the barrel sealing gland threaded into the square threads of the hydraulic cylinder barrel with the barrel sealing gland square threads; a plurality of lip retaining bolts extending through the barrel sealing gland lip and threaded into the hydraulic cylinder barrel;
a first piston disposed through the barrel sealing gland axial orifice and extending into the hydraulic cylinder barrel, the first piston having a first end, a second end, an outer surface, an axial hole extending therethrough, and a first piston axial inner surface, and forming a first pressurizable chamber defined by the axial inner surface of the hydraulic cylinder barrel and the first piston extending through the barrel sealing gland into the hydraulic cylinder barrel, the first piston axial inner surface threaded with square threads at the second end;
a first piston sealing gland having an axial body with an outer surface, a lip that extends axially out from the body, and an orifice extending axially through the first piston sealing gland forming an inner surface of the first piston sealing gland, the first piston sealing gland having square threads on the outer surface of the first piston sealing gland, the first piston sealing gland threaded into the square threads of the first piston;
a retract port extending through the hydraulic cylinder barrel in fluid communication with the first pressurizable chamber;
a second piston disposed through the axial hole extending through the first piston sealing gland and into the first piston forming a second pressurizable chamber defined by the first piston axial inner surface and the second piston extending through the first piston sealing gland into the first piston;
a relief valve extending through the hydraulic cylinder barrel and in fluid communication with the first pressurizable chamber; and
a plurality of bolts disposed through the first piston sealing gland and threaded into the first piston.