Particular Piston Seat Patents (Class 277/449)
  • Patent number: 12117085
    Abstract: A piston ring may include a spacer or expansion element and/or two segments. The segments may have a radial dimension between approximately 1.50 mm and approximately 1.90 mm and a height between approximately 0.30 mm and approximately 0.40 mm. The segments may have a concave profile with recesses between approximately 0.015 mm and approximately 0.030 mm and a clearance of approximately 0.150 mm. The segments may be wound via a matrix box device and a roller. The piston ring may have a circularity, expressed in the form of a decomposition as a Fourier series, with an amplitude for orders higher than 10 which is not greater than 0.10 ?m.
    Type: Grant
    Filed: July 19, 2022
    Date of Patent: October 15, 2024
    Assignees: Mahle International GmbH, Mahle Metal Leve S/A
    Inventors: Bruno Fineto, Rafael Antonio Bruno, Rafael Bettini Rabello, Marcelo Moura De Oliveira
  • Patent number: 11906051
    Abstract: An internal combustion engine includes a combustion chamber, a piston a plurality of piston rings. The combustion chamber has a bore wall. The piston is configured to move relative to the bore wall. The plurality of piston rings is provided to the piston. Each of the piston rings has a main body that is circular. Each of the pistons rings further has a stopper that protrudes from the main body.
    Type: Grant
    Filed: October 29, 2021
    Date of Patent: February 20, 2024
    Assignee: Nissan North America Inc.
    Inventors: Williams Muñoz, Jaime Lopez Ku
  • Patent number: 11525510
    Abstract: A piston ring (10) for forming a seal between a piston (26) and piston housing (28). The piston ring (10) has first and second orthogonal axes (12, 14) and a body portion (18) which is resiliently deformable in the direction of the first axis (12) and is substantially rigid in the direction of the second axis (14).
    Type: Grant
    Filed: January 12, 2010
    Date of Patent: December 13, 2022
    Assignee: Danfoss Power Solutions ApS
    Inventors: Uwe Bernhard Pascal Stein, Luke Wadsley
  • Patent number: 10669969
    Abstract: The present disclosure provides an open-faced piston with a circumferential groove into which a piston ring assembly is arranged. Openings at the bottom of the circumferential groove and between a front land of the open-faced piston and the piston face are provided. The openings are arranged to allow for a combustion reaction to propagate through the volume defined between the bottom of the piston ring assembly and the piston face such that at least a portion of an air and fuel mixture located in that volume is reacted.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: June 2, 2020
    Assignee: Mainspring Energy, Inc.
    Inventor: Matt Svrcek
  • Patent number: 9574645
    Abstract: The invention relates to a steering actuator piston with a rack (6) for an aircraft landing gear (1) characterized in that the piston comprises a body (10) made of a lightweight alloy having an externally threaded main span (11) terminated on one side by a shoulder (12) and extended on the other side by a skirt (13), the body having screwed to it a tapped bronze bushing having on its outer wall at least one groove for receiving a seal, the skirt having a drilling to receive a pin for securing the piston to the rack, the bushing extending in service between the shoulder and the pin so that it is retained axially between the shoulder and the pin.
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: February 21, 2017
    Assignee: MESSIER-BUGATTI-DOWTY
    Inventor: Marc Farcy
  • Patent number: 9091257
    Abstract: A compressor for generating compressed air in a vehicle includes at least one piston, a cylinder, a crankshaft, a lubricant connection, a lubricant supply channel, and a clutch device by means of which the crankshaft can be connected to or disconnected from a drive device. The lubricant supply channel opens into at least one lubricant outlet in the interior of the compressor directed toward a piston running surface of the cylinder at least in particular rotational positions of the crankshaft.
    Type: Grant
    Filed: January 16, 2010
    Date of Patent: July 28, 2015
    Assignee: WABCO GmbH
    Inventors: Volker Akemann, Joachim Grosskopf, Stefan Herzog, Steffen Krebs, Andreas Pretsch, Ralf Stoffels, Ingo Stumberg
  • Publication number: 20130154197
    Abstract: The seal arrangement (1) for piston compressors comprises a deformable ring support (2) and a first and a second endless sealing ring (3a, 3b), wherein the ring support (2) has a longitudinal axis (L) which extends perpendicularly with respect to its circumferential direction, and wherein the ring support (2) has a gap (2i) with play in its circumferential direction, and wherein each sealing ring (3a, 3b) has a longitudinal axis (3c, 3d) which extends perpendicularly with respect to its circumferential direction, and wherein the sealing rings (3a, 3b) are arranged in such a way that the ring support (2) encloses them from the outside, and wherein the two sealing rings (3a, 3b) are arranged next to one another in the direction of extent of the longitudinal axis (L), and wherein the ring support (2) and the sealing rings (3a, 3b) are designed to be adapted to one another in such a way that the first sealing ring (3a) bears on one side against a first side wall (2d) of the ring support (2) and forms a first gap
    Type: Application
    Filed: August 31, 2011
    Publication date: June 20, 2013
    Inventor: Norbert Feistel
  • Publication number: 20130113165
    Abstract: A piston bearing structure for a fluid pressure cylinder includes one seal ring which is housed in a housing groove of a piston and is held in sliding contact with a cylinder tube and two backup wear rings which is housed in a housing groove of a piston, is held in sliding contact with a cylinder tube and sandwiches the seal ring. The backup wear ring includes a pressure relief groove which faces the housing groove and extends over the backup ring portion and the wear ring portion, and the pressure relief groove allows opposite sides of the backup wear ring to communicate between the piston and the cylinder tube.
    Type: Application
    Filed: February 24, 2012
    Publication date: May 9, 2013
    Applicant: KAYABA INDUSTRY CO., LTD.
    Inventors: Daisuke Sueyoshi, Hiroyuki Emoto, Tomoko Imahori, Shusaku Saita
  • Publication number: 20080276919
    Abstract: A piston ring (3) for a two cycle internal combustion engine has a sealing portion (4) and a piston engaging portion (5) adapted to engage with a ring engaging portion of a piston (200) to restrict radial movement of the sealing portion (5). A piston, a piston assembly and a two cycle internal combustion engine including the piston ring are also disclosed.
    Type: Application
    Filed: June 8, 2005
    Publication date: November 13, 2008
    Inventor: Denver Stanley Porter Lawson
  • Patent number: 7396018
    Abstract: The invention relates to an oil scraper ring for pistons of internal combustion engines. The oil scraper ring comprises a disc that is provided with parallel flanks and a bearing surface having an asymmetrical crowned form with a vertex line extending over the periphery of the disc. A bracing spring arranged in a ring groove of the piston and comprising a spring groove side opposing the piston head and a spring groove side facing the piston head presses the disc radially against the friction and the abrasion of the bearing surface.
    Type: Grant
    Filed: September 2, 2004
    Date of Patent: July 8, 2008
    Assignee: MAHLE GmbH
    Inventor: Rolf-Gerhard Fiedler
  • Patent number: 7306232
    Abstract: A multipart oil wiping ring for pistons of internal combustion engines comprises two steel strip-type lamellae with parallel sides, the running surfaces of which are provided with a convexly asymmetric shape having a vertex line that extends across the circumference of the lamellae, and a bracing spring located between the lamellae. The bracing spring presses the lamellae in an axial direction against one respective side of an annular groove in the piston and in a radial direction against the cylinder wall.
    Type: Grant
    Filed: September 1, 2004
    Date of Patent: December 11, 2007
    Assignee: Mahle GmbH
    Inventor: Rolf-Gerhard Fiedler
  • Patent number: 7261301
    Abstract: The invention relates to an oil scraper ring for pistons of internal combustion engines, said oil scraper ring comprising a disc (1) provided with a bearing surface (h) having an asymmetrical crowned form with a vertex line (3) extending over the periphery of the disc. Said disk (1) is arranged in a ring groove (7) of the piston and respectively has a ring groove side (6) opposing the piston head and a parallel ring groove side (5) facing the piston head. The aim of the invention is to achieve an improved oil scraping action compared to that of prior art, while reducing the friction and the abrasion of the bearing surface.
    Type: Grant
    Filed: September 2, 2004
    Date of Patent: August 28, 2007
    Assignee: Mahle GmbH
    Inventor: Rolf-Gerhard Fiedler
  • Patent number: 7044473
    Abstract: Two seal rings are provided comprising an upper ring and a lower ring, the rings having a common axis, a common outer cylindrical surface, a common inner cylindrical surface, and a couple of facing surfaces. The facing surfaces form an engaging length in a radial section of the rings having a radially outer end and a radially inner end, and the facing surfaces and the common cylindrical surface define a first wedge-shaped gap with a radially inward leading edge at the outer end. The inward leading edge is provided with a first angle in a range of 10 seconds to 1 degree and 30 seconds, and the outer end is spaced more from the common cylindrical surface than from the common cylindrical inner surface.
    Type: Grant
    Filed: June 6, 2000
    Date of Patent: May 16, 2006
    Inventors: Zhihong Zhu, Baodong Wang
  • Patent number: 6682078
    Abstract: A ring groove for a two-piece oil ring of a piston is provided that has ring body equipped with a coil expander, wherein the ring body has an upper outer surface and a lower outer surface, both orthogonal to the axial direction of the piston. The ring groove also has an upper inner surface and a lower inner surface, both orthogonal to the axial direction of the piston; a radially inward-most, bottom surface connecting the upper and lower inner surfaces; and oil drain holes, each having an opening thereof located on the bottom surface. The ring groove has an axial width slightly greater than the width of the two-piece oil ring.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: January 27, 2004
    Assignees: Nippon Piston Ring Co., Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Hideshi Hitosugi, Nobuyuki Murakami, Taro Itoh
  • Publication number: 20040007824
    Abstract: This invention relates to the use of elastomers with the sealing element of reciprocating gas compressor valves to increase the reliability of the gas tight seal within the reciprocating gas compressor valve and to increase the useful life of reciprocating gas compressor valve. The elastomeric material is either used as a coating layer on the sealing element of the reciprocating gas compressor valve, or as the entire sealing element. The elastomeric material acts as a cushion to reduce the wear on the sealing element, provides a superior gas tight seal, and is more tolerant of entrained dirt or liquids in the gas stream thereby increasing the operable life of the reciprocating gas compressor valve. Reducing the mean time between reciprocating gas compressor valve failures results in longer reciprocating gas compressor run times for the user, increased revenue generation for the user and safer operation of said equipment.
    Type: Application
    Filed: June 24, 2003
    Publication date: January 15, 2004
    Inventor: Kevin Patrick Durham
  • Patent number: 6547251
    Abstract: A ring groove for a two-piece oil ring of a piston is provided that has ring body equipped with a coil expander, wherein the ring body has an upper outer surface and a lower outer surface, both orthogonal to the axial direction of the piston. The ring groove also has an upper inner surface and a lower inner surface, both orthogonal to the axial direction of the piston; a radially inward-most, bottom surface connecting the upper and lower inner surfaces; and oil drain holes, each having an opening thereof located on the bottom surface. The ring groove has an axial width slightly greater than the width of the two-piece oil ring.
    Type: Grant
    Filed: March 27, 2000
    Date of Patent: April 15, 2003
    Assignees: Nippon Piston Ring Co., Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Hideshi Hitosugi, Nobuyuki Murakami, Taro Itoh