GB897293A - Long travel hydraulic cushion device - Google Patents

Long travel hydraulic cushion device

Info

Publication number
GB897293A
GB897293A GB3523860A GB3523860A GB897293A GB 897293 A GB897293 A GB 897293A GB 3523860 A GB3523860 A GB 3523860A GB 3523860 A GB3523860 A GB 3523860A GB 897293 A GB897293 A GB 897293A
Authority
GB
United Kingdom
Prior art keywords
piston
rod
cylinder
sleeve
passages
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.)
Expired
Application number
GB3523860A
Inventor
William Hartin Peterson
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.)
Pullman Inc
Original Assignee
Pullman 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
Application filed by Pullman Inc filed Critical Pullman Inc
Priority to GB3523860A priority Critical patent/GB897293A/en
Priority to FR844868A priority patent/FR1282582A/en
Publication of GB897293A publication Critical patent/GB897293A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/48—Arrangements for providing different damping effects at different parts of the stroke
    • F16F9/486—Arrangements for providing different damping effects at different parts of the stroke comprising a pin or stem co-operating with an aperture, e.g. a cylinder-mounted stem co-operating with a hollow piston rod
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
    • F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
    • F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
    • F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/34—Special valve constructions; Shape or construction of throttling passages
    • F16F9/342—Throttling passages operating with metering pins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/36—Special sealings, including sealings or guides for piston-rods

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

897,293. Stuffing-box substitutes. PULLMAN Inc. Oct. 14 1960, No. 35238/60. Class 122 (5). [Also in Group XXXII] Hydraulic shock-absorbers are provided with flexible tubular seals between the piston-rod and cylinder to eliminate the necessity for sliding seals. In one example the piston-rod 44 Fig. 3 and cylinder end wall 150 guiding the piston-rod 44 are sealed externally of the cylinder by a flexible tubular sleeve 18 of rubber, neoprene, &c. clamped at its ends by metal clips 42, 46 and adapted to roll over the pistonrod 44. Passages 66 in the end wall 150 permit surplus hydraulic fluid to flow freely into the sealed space formed by the sleeve 18 during the compression stroke so that the sleeve becomes inflated and acts as a fluid recuperator on the return stroke. In a modification, the seal comprises bellows 41, Fig. 13, arranged between the piston-rod 139 and piston guide 152 internally of the cylinder so that hydraulic fluid is prevented from reaching the sliding surfaces. Brass wear-rings 191, 193 are provided on the inner face of the bellows where rubbing may take place against the piston-rod 139. Passages 66 in the guide permit free flow of ambient air.
GB3523860A 1960-10-14 1960-10-14 Long travel hydraulic cushion device Expired GB897293A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3523860A GB897293A (en) 1960-10-14 1960-10-14 Long travel hydraulic cushion device
FR844868A FR1282582A (en) 1960-10-14 1960-11-24 Improvements to long-stroke hydraulic shock absorbers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3523860A GB897293A (en) 1960-10-14 1960-10-14 Long travel hydraulic cushion device

Publications (1)

Publication Number Publication Date
GB897293A true GB897293A (en) 1962-05-23

Family

ID=10375450

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3523860A Expired GB897293A (en) 1960-10-14 1960-10-14 Long travel hydraulic cushion device

Country Status (1)

Country Link
GB (1) GB897293A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3294388A (en) * 1964-09-17 1966-12-27 Pullman Inc Hydraulic cushion
FR2397282A1 (en) * 1977-07-13 1979-02-09 Usm Corp SEALING DEVICE FOR EXTRUDER

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3294388A (en) * 1964-09-17 1966-12-27 Pullman Inc Hydraulic cushion
FR2397282A1 (en) * 1977-07-13 1979-02-09 Usm Corp SEALING DEVICE FOR EXTRUDER

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