US3876082A - Resilient buffer device - Google Patents

Resilient buffer device Download PDF

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Publication number
US3876082A
US3876082A US365516A US36551673A US3876082A US 3876082 A US3876082 A US 3876082A US 365516 A US365516 A US 365516A US 36551673 A US36551673 A US 36551673A US 3876082 A US3876082 A US 3876082A
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US
United States
Prior art keywords
base plate
buffer
buffer body
adjacent
envelope
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 - Lifetime
Application number
US365516A
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English (en)
Inventor
Anton Fehl
Winfried Heinz
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.)
VULKAN HAFENTECHNIK GmbH
Original Assignee
Fried Krupp AG
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 Fried Krupp AG filed Critical Fried Krupp AG
Application granted granted Critical
Publication of US3876082A publication Critical patent/US3876082A/en
Assigned to VULKAN HAFENTECHNIK GMBH reassignment VULKAN HAFENTECHNIK GMBH ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: FRIED. KRUPP GMBH
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/37—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers of foam-like material, i.e. microcellular material, e.g. sponge rubber

Definitions

  • the present invention relates to a buffer, especially for cranes, the buffer body of which is made of a foamed synthetic material and is surrounded by a tightskin resistance against aggressive substances.
  • This skin which heretofore was applied by spraying the respective synthetic material onto the foamed body is intended to protect the foamed material of the buffer body against aggressive substances such as gases and water steam. If the buffer body is formed by two or more sections cemented to each other, the skin is also intended to prevent a separation of said sections from each other or from the base plate of the buffer.
  • the harmful components or ingredients thus entering the foamed material bring about that the foamed body will after a while become rotten and is unable to meet its intended purpose any longer.
  • an object of the present invention to provide a buffer, especially for cranes, in which the foamed body is reliably protected against harmful influences, and which buffer can be produced economically.
  • FIGS. I and 2 respectively illustrate longitudinal sections through two embodiments of buffers according to the present invention.
  • FIGS. 3 and 4 respectively illustrate axial sections through portions of buffers according to two further embodiments of the invention.
  • the buffer body is in all embodiments illustrated formed by three sections 1, 2, 3 of foamed synthetic material, for instance, of cellular polyurethane.
  • the cells are preferably non-permeable and contain gas bubbles. Accordingly, the buffer body has a speed dependent characteristic which means that the buffer forces are all the greater the higher the speed is at which the buffer bodies are compressed.
  • the section 1 is cemented to a base plate 4 and additionally is positively connected thereto by rivet-shaped extensions 5 which extend through and fully fill corresponding bores in the base plate 4 which is realized by the foaming process when producing the section 1.
  • the ends of the extensions 5 are widened in a truncated cone-shaped manner.
  • a prefabricated sleeve or envelope 6 which consists of a strong synthetic material resistant against aggressive substances is in a tight and taut manner pulled over the buffer body 1, 2, 3.
  • This sleeve 6 tightly engages the impact surface 7 as well as the circumferential surface of the buffer body and has no pores or passages so that the buffer body is tightly closed off on all sides.
  • the sleeve 6 has that rim portion which faces away from the impact surface 7 provided with a collar 8 which rests on the base plate 4.
  • the collar 8 is pressed against the base plate 4 by means of a flat ring 9 and screws 10. Screws 10, the heads of which are countersunk in ring 9 pass through bores in the collar 8 and are screwed into threaded bores of the base plate 4.
  • Collar 8 may be connected to the base plate 5 by cementing, or the like. If desired, this connection may be effected by cementing as well as by pressing the collar onto the plate 4, for instance, by means of a ring 9 and screws 10.
  • the sleeve 6 Since in this way the sleeve 6 is firmly adhering to the base plate 4, the sleeve 6 will always meet its require ment, namely, to firmly hold the sections l, 2 and 3 of the synthetic body together.
  • the sleeve or envelope 11 is connected to the base plate 4 by pulling that rim of the sleeve which faces away from the impact surface 7 of the buffer body into an annular groove on the base plate 4.
  • the annular groove 12 is provided in a cylindrical extension 13 of the base plate 4 against which the disc I of the buffer body rests and which has the same diameter as disc I.
  • the annular groove 12 is so arranged that the outer surface 14 of the base plate 4 continues without step into the annular groove 12.
  • the rim 15 of sleeve 11 is pulled tightly into the annular groove I2 by heating the sleeve 11 after it has been loosely pulled over the body 1, 2, 3 of synthetic material.
  • the latter shrinks so that it tightly engages the buffer body. Consequently, the nubs 16 located at the impact surface 7 of the buffer body protrude from the sleeve II which tightly surrounds the same so that they can meet their requirements, namely, during a slant buffer shock to prevent the counterbody from sliding off.
  • the sleeve II will when being heated up, tightly engage the buffer body 1, 2, 3.
  • the sleeve 1] is pulled into annular grooves 17 between each two discs I, 2 and 2, 3.
  • the rim 15 of the sleeve 11 which first forms the continuation of the cylindrical parts of sleeve 11 as illustred in FIG. 2 by dot-dash line I5 is, in view of the shrinking brought about by the heating up of sleeve ll pulled into the annular groove 12 as is shown in FIG. 2 with solid lines.
  • the rim 15 will thus under tension be located in the annular groove 12 and will firmly clamp the sleeve 11 against the base plate 4. Accordingly, the sleeve 11 will be able firmly to hold the sections 1, 2, 3 of the buffer body against the base plate 4.
  • a skin of synthetic material may be sprayed over the rim of sleeve 11; this rim is pulled into the annular groove 12 and also over the adjacent region of the outer surface 14 of base plate 4 so that a particularly firm and tight connection will be obtained between the rim 15 and the base plate 4.
  • FIG. 3 differs from that of FIG. 2 merely in that the annular groove 18 is not worked into the extension 13 of base plate 1, but is formed by having section 1 protrude in radial direction relative to the circumferential surface of extension 13. Also, in this instance, the rim 15 of the sleeve 11 is pulled into groove l8 by the fact that in view of the heating of sleeve 11 a shrinking thereof is effected.
  • the annular groove 19 is formed by having the section 1 spring back in a range extending up to the base plate 4 and all the way around.
  • the base plate 4 does not have the extension 13 of FIG. 3.
  • the sleeve 11 will on all sides tightly engage the buffer body and its rim 15 will be pulled into the annular groove 19.
  • FIG. 4 further shows that also in this instance the sleeve ll is pulled into the annular groove 17 which is located at the joint between the sections 1 and 2. Furthermore, it will be seen from FIG.
  • a sprayed-on skin 21 extends over the rim 15 of sleeve 11, which rim is pulled into the annular groove 19 and extends in particular over a lip 20 of rim 15 which lip engages the base plate 4.
  • the skin 21 continues over the outer surface 14 of the base plate 4. In this way a tight adherence of the rim 15 to the base plate 4 will be realized.
  • the required tight engagement of the body 1, 2, 3 of synthetic material by the sleeve 6, 11 may, if desired, also be realized by inserting the prefabricated sleeve prior to the manufacture of the buffer body into a foam mold so that the said sleeve will first have an outer diameter which is less than the inner diameter of the mold while also the plane closure part of the sleeve which is tightly to engage the impact surface 7 of the buffer body will first be spaced from the bottom of the mold.
  • the synthetic material is foamed within the sleeve 6, 11. During this foaming operation, the foam being formed swells over the volume enclosed by the sleeve.
  • the sleeve is widened until it engages the cylindrical inner wall as well as the bottom of said mold.
  • the required tight engagement of the sleeve with the finished foamed buffer body is realized.
  • This method can be employed in particular with the embodiment of FIG. 4 when the sleeve 11 is inserted into such mold first in radially spaced relationship thereto, said mold having annular strips corresponding to the annular grooves 17 and 19.
  • a buffer especially for cranes, which includes: a buffer body of foamed synthetic material, a base plate supporting said buffer body and being connected thereto, and a pre-fabricated fluid-tight protective envelope engaging and encasing said buffer body and being firmly connected to said base plate, said base plate having perforations, and said buffer body having extension means extending into said perforations and being anchored therein, said base plate having a reduced diameter section surrounded by a portion of said envelope, and said reduced diameter section being provided with a circumferential groove having the adjacent envelope portion firmly anchored therein.
  • a buffer according to claim 1 in which the reduced diameter section of said base plate corresponds in cross section substantially to that of the adjacent buffer portion.
  • a buffer especially for cranes, which includes: a buffer body of foamed synthetic material, a base plate supporting said buffer body and being connected thereto, and a pre-fabricated fluid-tight protective envelope engaging and encasing said buffer body and being firmly connected to said base plate, said base plate having perforations, and said buffer body having extension means extending into said perforations and being anchored therein, said base plate having a reduced diameter section with the diameter thereof less than the diameter of the adjacent buffer section whereby a groove is formed in part by the circumferential surface of said reduced diameter section and in part by the adjacent surface of the remainder of said base plate and in part by the adjacent surface of said buffer body, said envelope having that portion thereof which is adjacent said last mentioned groove nesting and an chored in the latter.
  • a buffer especially for cranes, which includes: a buffer body of foamed synthetic material, a base plate supporting said buffer body and being connected thereto, and a pre-fabricated fluid-tight protective envelope engaging and encasing said buffer body and being firmly connected to said base plate, said base plate having perforations, and said buffer body having extension means extending into said perforations and being anchored therein, said buffer body having a reduced diameter portion directly adjacent said base plate forming a spring back section with the major por tion of said buffer body, said section together with an adjacent portion of said base plate forming a circumferential groove receiving and having anchored therein the adjacent portion of said envelope.
  • a buffer according to claim 4 which includes a skin over an end portion of the envelope in said last mentioned circumferential groove and an adjacent surface portion of said base plate.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Buffer Packaging (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
US365516A 1972-06-21 1973-05-31 Resilient buffer device Expired - Lifetime US3876082A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2230130A DE2230130A1 (de) 1972-06-21 1972-06-21 Puffer, insbesondere fuer krane

Publications (1)

Publication Number Publication Date
US3876082A true US3876082A (en) 1975-04-08

Family

ID=5848261

Family Applications (1)

Application Number Title Priority Date Filing Date
US365516A Expired - Lifetime US3876082A (en) 1972-06-21 1973-05-31 Resilient buffer device

Country Status (5)

Country Link
US (1) US3876082A (it)
JP (1) JPS4985751A (it)
DE (1) DE2230130A1 (it)
GB (1) GB1413187A (it)
IT (1) IT990655B (it)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4008915A (en) * 1975-06-04 1977-02-22 Dynamics Research And Manufacturing, Inc. Impact barrier for vehicles
US4085832A (en) * 1975-05-14 1978-04-25 Gulf & Western Manufacturing Company Multi-chambered foam energy absorber
US4427189A (en) 1979-06-04 1984-01-24 Nissan Motor Co., Ltd. Shock absorbing assembly
US4598001A (en) * 1983-03-24 1986-07-01 Japan Styrene Paper Corporation Bumper core and process producing same
US5545361A (en) * 1994-02-10 1996-08-13 Shape Corporation Method of making a vehicle bumper with foam therein using a deformable plug
US5762001A (en) * 1995-06-07 1998-06-09 Thrall Car Manufacturing Company Door edge protector
US5765486A (en) * 1995-11-16 1998-06-16 Thrall Car Manufacturing Company Auto rack railway car
US6003443A (en) * 1997-12-29 1999-12-21 Jervis B. Webb Company Method and apparatus for reducing noise generated by the accumulation of carriers in a conveyor system
US6374747B1 (en) 1999-05-06 2002-04-23 Jervis B. Webb Company Sound abatement methods and conveyor trolleys
US20040075204A1 (en) * 2001-02-07 2004-04-22 Josef Heidemann Spring element
US20040094880A1 (en) * 2002-11-18 2004-05-20 Bai-Hsin Lee Polyurethane foam shock absorber
US20050196233A1 (en) * 2003-09-10 2005-09-08 P.V. Vijay Blocks for absorption of collision energy
EP1591400A1 (de) * 2004-04-28 2005-11-02 BASF Aktiengesellschaft Seilpuffer, insbesondere für Aufzüge
CN105197790A (zh) * 2015-10-30 2015-12-30 湖州洋西起重设备有限公司 新型双托板电缆滑车首端
CN105197794A (zh) * 2015-10-30 2015-12-30 湖州洋西起重设备有限公司 一种电缆滑车
CN105197789A (zh) * 2015-10-30 2015-12-30 湖州洋西起重设备有限公司 双托板电缆滑车首端机构
CN105417374A (zh) * 2015-10-30 2016-03-23 湖州洋西起重设备有限公司 一种用于电缆滑车首端的模块化缓冲器
WO2022235925A1 (en) * 2021-05-05 2022-11-10 Buffers Usa, Inc. Joining elastic material to metal
TWI923763B (zh) 2021-05-05 2026-05-01 美商巴芙斯美國公司 吸收衝擊或吸收振動之組件及將吸收衝擊或吸收振動之彈性材料固定至金屬基底之方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3815817A1 (de) * 1988-05-09 1989-11-23 Boge Ag Lager zur elastischen lagerung von maschinen, maschinenteilen und/oder fahrzeugteilen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3241875A (en) * 1962-10-02 1966-03-22 Davy & United Eng Co Ltd Bumper having elastomeric shock absorber
US3294254A (en) * 1964-06-17 1966-12-27 Kastalon Inc Bumper device
US3493257A (en) * 1967-03-22 1970-02-03 Gen Motors Corp Resilient microcellular foam bumper
US3494607A (en) * 1967-10-02 1970-02-10 Ford Motor Co Impact energy absorbing fluid cushion structure
US3690710A (en) * 1971-05-12 1972-09-12 Michael G Curran Shock absorbing bumper
US3721433A (en) * 1969-11-21 1973-03-20 Collision Devices Inc Deformable shock-absorbing guard

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3241875A (en) * 1962-10-02 1966-03-22 Davy & United Eng Co Ltd Bumper having elastomeric shock absorber
US3294254A (en) * 1964-06-17 1966-12-27 Kastalon Inc Bumper device
US3493257A (en) * 1967-03-22 1970-02-03 Gen Motors Corp Resilient microcellular foam bumper
US3494607A (en) * 1967-10-02 1970-02-10 Ford Motor Co Impact energy absorbing fluid cushion structure
US3721433A (en) * 1969-11-21 1973-03-20 Collision Devices Inc Deformable shock-absorbing guard
US3690710A (en) * 1971-05-12 1972-09-12 Michael G Curran Shock absorbing bumper

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4085832A (en) * 1975-05-14 1978-04-25 Gulf & Western Manufacturing Company Multi-chambered foam energy absorber
US4008915A (en) * 1975-06-04 1977-02-22 Dynamics Research And Manufacturing, Inc. Impact barrier for vehicles
US4427189A (en) 1979-06-04 1984-01-24 Nissan Motor Co., Ltd. Shock absorbing assembly
US4598001A (en) * 1983-03-24 1986-07-01 Japan Styrene Paper Corporation Bumper core and process producing same
US5545361A (en) * 1994-02-10 1996-08-13 Shape Corporation Method of making a vehicle bumper with foam therein using a deformable plug
US5545022A (en) * 1994-02-10 1996-08-13 Shape Corporation Apparatus for manufacturing a vehicle bumper
US5762001A (en) * 1995-06-07 1998-06-09 Thrall Car Manufacturing Company Door edge protector
US5765486A (en) * 1995-11-16 1998-06-16 Thrall Car Manufacturing Company Auto rack railway car
US6003443A (en) * 1997-12-29 1999-12-21 Jervis B. Webb Company Method and apparatus for reducing noise generated by the accumulation of carriers in a conveyor system
US6374747B1 (en) 1999-05-06 2002-04-23 Jervis B. Webb Company Sound abatement methods and conveyor trolleys
US20040075204A1 (en) * 2001-02-07 2004-04-22 Josef Heidemann Spring element
US20040094880A1 (en) * 2002-11-18 2004-05-20 Bai-Hsin Lee Polyurethane foam shock absorber
US20050196233A1 (en) * 2003-09-10 2005-09-08 P.V. Vijay Blocks for absorption of collision energy
EP1591400A1 (de) * 2004-04-28 2005-11-02 BASF Aktiengesellschaft Seilpuffer, insbesondere für Aufzüge
CN105197790A (zh) * 2015-10-30 2015-12-30 湖州洋西起重设备有限公司 新型双托板电缆滑车首端
CN105197794A (zh) * 2015-10-30 2015-12-30 湖州洋西起重设备有限公司 一种电缆滑车
CN105197789A (zh) * 2015-10-30 2015-12-30 湖州洋西起重设备有限公司 双托板电缆滑车首端机构
CN105417374A (zh) * 2015-10-30 2016-03-23 湖州洋西起重设备有限公司 一种用于电缆滑车首端的模块化缓冲器
WO2022235925A1 (en) * 2021-05-05 2022-11-10 Buffers Usa, Inc. Joining elastic material to metal
TWI923763B (zh) 2021-05-05 2026-05-01 美商巴芙斯美國公司 吸收衝擊或吸收振動之組件及將吸收衝擊或吸收振動之彈性材料固定至金屬基底之方法

Also Published As

Publication number Publication date
JPS4985751A (it) 1974-08-16
DE2230130A1 (de) 1974-01-10
IT990655B (it) 1975-07-10
GB1413187A (en) 1975-11-12

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Legal Events

Date Code Title Description
AS Assignment

Owner name: VULKAN HAFENTECHNIK GMBH

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:FRIED. KRUPP GMBH;REEL/FRAME:005725/0634

Effective date: 19900806