# US 2017/0321785 A1 · Valvular paths > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0321785 A1 - Document ID: US20170321785A1 - Status: Published application - Kind: A1 - Application number: 15/520,456 - Filed: 2015-10-14 - Published: 2017-11-09 - Earliest claimed: 2014-10-29 - Assignees: BorgWarner Inc. - Applicants: BorgWarner Inc. - Inventors: Matthew W. CRUMP; Keith B. COBB - Web page: https://patentgrep.com/patent/US20170321785A1 ## CPC - F16H 7/08: Means for varying tension of belts, ropes or chains (pulleys of adjustable construction F16H55/52) - F01L 1/022: {Chain drive} - F01L 1/348: by means acting on timing belts or chains - F16H 7/0834: {of the viscous friction type, e.g. viscous fluid} - F16H 7/12: of an idle pulley - F16H 2007/0806: {Compression coil springs} - F16H 2007/0812: {Fluid pressure} - F16H 2007/0859: {Check valves} - F16H 2007/0891: {Linear path} - F16H: GEARING - F01L: CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES ## Abstract A product for applying tension is disclosed. A block may have a first passage opening into the block. A body may have a first manifold and may be positioned against the block so that the first passage is open to the first manifold. The body may have a flow path for providing fluid from the first manifold to a second manifold and there through to a pressure chamber. The flow path may include a series of channels and may be configured to allow substantially unimpeded flow from the first manifold to the second manifold, and to impede flow from the second manifold to the first manifold. The flow path may be free of movable components. ## Claims ### Claim 1 A product for applying tension comprising: a block with a first passage opening into the block; a body having a first manifold, the body positioned against the block so that the first passage is open to the first manifold; the body having a flow path for providing fluid from the first manifold to a second manifold and through the second manifold to a pressure chamber; wherein the flow path includes a series of channels and is configured to allow substantially unimpeded flow from the first manifold to the second manifold; and wherein the flow path is configured to impede flow from the second manifold to the first manifold; and wherein the flow path is free of movable components. ### Claim 2 (depends on 1) The product according to claim 1 further comprising a piston slidably disposed in the body wherein the pressure chamber is formed between the body and the piston so that fluid supplied from the first passage enters the pressure chamber as the piston slides out of the body. ### Claim 3 (depends on 2) The product according to claim 2 wherein the series of channels comprise a series of straight segments and semi-circular segments; and wherein flow is substantially unimpeded in a first direction through the series of straight segments and flow is interrupted by the semi-circular segments in a second direction. ### Claim 4 (depends on 3) The product according to claim 3 wherein each semi-circular segment connects between an end of a first straight segment and a side of a second straight segment. ### Claim 5 (depends on 4) The product according to claim 4 wherein each semi-circular segment connects to the side of the second straight segment so that flow enters the second straight segment from the semi-circular segment substantially perpendicular to the second straight segment. ### Claim 6 A hydraulic tensioner for applying force to a component of an engine comprising: a body having a piston bore, a first manifold, and a second manifold; a piston slidably disposed in the piston bore defining a first chamber in the piston bore between the body and the piston; a first passage in the body extending between the piston bore and the second manifold; a second passage in the engine that is in fluid communication with the first manifold; a plurality of flow channels between the first manifold and the second manifold; wherein the flow channels are configured to allow substantially unimpeded flow from the first manifold to the second manifold and the flow channels are configured to impede flow from the second manifold to the first manifold and wherein the flow channels are free of movable components. ### Claim 7 (depends on 6) The hydraulic tensioner according to claim 6 wherein the second passage is connected to a source of pressurized fluid in the engine, wherein the product is configured so that pressurized fluid supplied from the second passage, passes through the flow channels to the first chamber as the piston slides out of the body. ### Claim 8 (depends on 7) The hydraulic tensioner according to claim 7 wherein the flow channels each comprise a series of straight segments and semi-circular segments and wherein flow is substantially unimpeded in a first direction through the series of straight segments and flow is interrupted by the semi-circular segments in a second direction. ### Claim 9 (depends on 8) The hydraulic tensioner according to claim 8 wherein each semi-circular segment connects between an end of a first straight segment and a side of a second straight segment. ### Claim 10 (depends on 9) The hydraulic tensioner according to claim 9 wherein each semi-circular segment connects to the side of the second straight segment so that flow enters the second straight segment from the semi-circular segment substantially perpendicular to the second straight segment.