US20070034079A1 - Packing assembly for cylinder casing - Google Patents

Packing assembly for cylinder casing Download PDF

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Publication number
US20070034079A1
US20070034079A1 US11204254 US20425405A US2007034079A1 US 20070034079 A1 US20070034079 A1 US 20070034079A1 US 11204254 US11204254 US 11204254 US 20425405 A US20425405 A US 20425405A US 2007034079 A1 US2007034079 A1 US 2007034079A1
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US
Grant status
Application
Patent type
Prior art keywords
parts
packing
seal
cylinder
piston
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11204254
Inventor
Murray Gardner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Puretorq Inc
Original Assignee
Puretorq Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01CROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C19/00Sealing arrangements in rotary-piston machines or engines
    • F01C19/12Sealing arrangements in rotary-piston machines or engines for other than working fluid
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01CROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C9/00Oscillating-piston machines or engines
    • F01C9/002Oscillating-piston machines or engines the piston oscillating around a fixed axis
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith characterised by the construction of the motor unit
    • F15B15/12Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith characterised by the construction of the motor unit of the oscillating-vane or curved-cylinder type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J15/00Sealings
    • F16J15/16Sealings between relatively-moving surfaces
    • F16J15/34Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/3436Pressing means
    • F16J15/3456Pressing means without external means for pressing the ring against the face, e.g. slip-ring with a resilient lip

Abstract

A packing assembly for a cylinder is clamped between two parts of a casing of a cylinder between which a piston is received. The piston has a shaft which extends out from the casing of the cylinder. The packing assembly includes two seal frames connected to the two parts and the packing is clamped between the two seal frames. The packing includes a seal portion in contact with a top and a bottom of the piston. A seal tongue extends from the inner periphery of the packing and is in contact with inside of the two parts so as to seal the conjunction portion of the two parts of the casing. The seal frames are tightly engaged with the two parts of the cylinder so that the two respective connection peripheries of the two parts do not need to be machined precisely.

Description

    FIELD OF THE INVENTION
  • The present invention relates to a packing assembly which includes two packing frames with a packing clamped therebetween, so that the connection periphery of two parts of the cylinder casing need not to be precisely machined.
  • BACKGROUND OF THE INVENTION
  • A conventional cylinder is shown in FIGS. 5 to 7 and generally includes a fan-shaped piston 10 which is received in a casing composed of two half parts 12 and a packing 11 is clamped between the two parts 12 so as to achieve an air sealed combination. One of the two parts 12 has an inlet 121 for introduction of air and the other part 12 has an outlet (not shown) to allow air to escape therefrom when the fan-shaped piston 10 is pivoted about a shaft 101 between the two parts 12. The packing 11 is an enclosed member and includes a flexible portion 112 extending from an inner periphery thereof. The flexible portion 112 are in contact with top and bottom of the fan-shaped piston 10 so as to have a sealed function when the piston 10 is operated. Nevertheless, the packing 10 clamped between the two parts 12 is affected and/or deformed by the temperature change so that leakage happens from gaps between the packing 11 and the two parts 12. In order to well position the packing 11, the connection periphery of each of the two parts 12 has to be provided with a groove which is machined precisely to accommodate the packing 11. The parts 12 are made by metal so that complex processes are required to make the grooves in the limited area of the connection periphery. Once the groove is not machined precisely, leakage happens.
  • The present invention intends to provide a packing assembly that includes two packing frames which are easily matched with the parts and the packing is clamped between the tow frames which are engaged with the two parts. The packing includes a seal tongue to contact the insides of the two seal frames so as to prevent leakage between the packing and the half parts of the casing.
  • SUMMARY OF THE INVENTION
  • The present invention relates to a cylinder which includes a casing composed of two parts and a piston is received between the two parts so as to drive a shaft extending out from the cylinder. Two seal frames are engaged with two respective insides of the two parts and a packing is clamped between the two seal frame. A seal portion extends from an inner periphery of the packing and is in contact with a top and a bottom of the piston. A seal tongue extends from the inner periphery of the packing and is in contact with two respective insides of the two parts.
  • The primary object of the present invention is to provide a packing assembly that is easily positioned between the two parts of the cylinder without precisely machining processes to the two parts of the casing.
  • The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 shows a cylinder with the packing assembly of the present invention;
  • FIG. 2 is an exploded view to show the cylinder with the packing assembly of the present invention;
  • FIG. 3 is a cross sectional view to show the packing assembly in the cylinder;
  • FIG. 4 is an enlarged cross sectional view to show that the seal tongue of the packing contacting the insides of the two parts;
  • FIG. 5 is an exploded view to show a conventional packing and cylinder;
  • FIG. 6 is a cross sectional view to show the conventional packing in the casing of the cylinder, and
  • FIG. 7 is an enlarged cross sectional view to show that the conventional packing cannot prevent leakage from the conjunction portion of the two parts.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • Referring to FIGS. 1 to 4, the packing assembly of the present invention is clamped between two parts 12 of a casing of the cylinder 1 and a fan-shaped piston 10 is received between the two parts 12. One of the two parts 12 has an inlet 121 for introducing air in the cylinder 1 and the other part 12 has an outlet (not shown) to allow air to escape from the cylinder 1. The piston 10 has a shaft 101 which extends out from the cylinder so as to output torque.
  • The packing assembly includes two seal frames 13 engaged with two respective insides of the two parts 12 and a packing 11 clamped between the two seal frame 13, a seal portion 112 extending from an inner periphery of the packing 11 and being in contact with a top and a bottom of the piston 10, a seal tongue 111 extending from the inner periphery of the packing 11 and in contact with two respective insides of the two parts 12.
  • The packing 11 includes two ring-shaped portions 112 connected on two facing insides of the packing 11. The two ring-shaped portions 112 are in contact with a top and a bottom of the piston 10. A seal tongue 111 extends from each of the ring-shaped portions 112 and is in contact with inside of the two parts 12. The seal tongues 111 made by flexible material and in a loop shape which extends inclinedly outward from the ring-shaped portion 112.
  • When the fan-shaped piston 10 is pivoted about the shaft 101, the ring-shaped portions 112 seal the top and bottom of the fan-shaped piston 10 and the tongues 111 seal the conjunction portion of the two parts 12. As shown in FIG. 5, even if the packing 11 is deformed due to temperature change, the flexible tongues 111 of the packing 11 are still in contact with the insides of the two parts 12 such that leakage can be efficiently prevented.
  • While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.

Claims (3)

  1. 1. A cylinder 1 comprising:
    a casing composed of two parts 12 and a piston 10 received between the two parts 12, the piston 10 having a shaft 101 which extends out from the cylinder 1, two seal frames 13 engaged with two respective insides of the two parts 12 and a packing 11 clamped between the two seal frame 13, a seal portion 112 extending from an inner periphery of the packing 11 and being in contact with a top and a bottom of the piston 10, a seal tongue 111 extending from the inner periphery of the packing 11 and in contact with two respective insides of the two parts 12.
  2. 2. The cylinder as claimed in claim 1, wherein the seal tongue 111 extends inclinedly outward from the inner periphery of the packing 11.
  3. 3. The cylinder as claimed in claim 1, wherein the seal tongue 111 is made by flexible material.
US11204254 2005-08-15 2005-08-15 Packing assembly for cylinder casing Abandoned US20070034079A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11204254 US20070034079A1 (en) 2005-08-15 2005-08-15 Packing assembly for cylinder casing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11204254 US20070034079A1 (en) 2005-08-15 2005-08-15 Packing assembly for cylinder casing

Publications (1)

Publication Number Publication Date
US20070034079A1 true true US20070034079A1 (en) 2007-02-15

Family

ID=37741398

Family Applications (1)

Application Number Title Priority Date Filing Date
US11204254 Abandoned US20070034079A1 (en) 2005-08-15 2005-08-15 Packing assembly for cylinder casing

Country Status (1)

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US (1) US20070034079A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011060587A1 (en) * 2009-11-20 2011-05-26 Wang James Cylinder structure
CN103352892A (en) * 2013-07-19 2013-10-16 武汉科技大学 Vane type hydraulic oscillating cylinder capable of being disassembled in radial direction

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3554096A (en) * 1968-12-09 1971-01-12 Xomox Corp Vane-type actuator
US3688645A (en) * 1970-06-29 1972-09-05 Matryx Corp Vane-type actuator
US4009644A (en) * 1972-07-14 1977-03-01 Chukyo Electric Co., Ltd. Rotary actuator
US6318701B1 (en) * 1997-10-07 2001-11-20 Murray Joseph Gardner Pneumatic actuator
US6511040B2 (en) * 1997-10-07 2003-01-28 Murray J. Gardner Pneumatic actuator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3554096A (en) * 1968-12-09 1971-01-12 Xomox Corp Vane-type actuator
US3688645A (en) * 1970-06-29 1972-09-05 Matryx Corp Vane-type actuator
US4009644A (en) * 1972-07-14 1977-03-01 Chukyo Electric Co., Ltd. Rotary actuator
US6318701B1 (en) * 1997-10-07 2001-11-20 Murray Joseph Gardner Pneumatic actuator
US6511040B2 (en) * 1997-10-07 2003-01-28 Murray J. Gardner Pneumatic actuator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011060587A1 (en) * 2009-11-20 2011-05-26 Wang James Cylinder structure
US20110226124A1 (en) * 2009-11-20 2011-09-22 James Wang Pneumatic Actuator Structure
US8671672B2 (en) 2009-11-20 2014-03-18 Easy Tork Automation Corporation Pneumatic actuator structure
CN103352892A (en) * 2013-07-19 2013-10-16 武汉科技大学 Vane type hydraulic oscillating cylinder capable of being disassembled in radial direction

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Legal Events

Date Code Title Description
AS Assignment

Owner name: PURETORQ, INC., CANADA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:GARDNER, MURRAY;REEL/FRAME:016893/0746

Effective date: 20050812