US3372881A - Spiderless gyratory crusher with relief valve system - Google Patents

Spiderless gyratory crusher with relief valve system Download PDF

Info

Publication number
US3372881A
US3372881A US544872A US54487266A US3372881A US 3372881 A US3372881 A US 3372881A US 544872 A US544872 A US 544872A US 54487266 A US54487266 A US 54487266A US 3372881 A US3372881 A US 3372881A
Authority
US
United States
Prior art keywords
crusher
post
pressure
head
eccentric
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
US544872A
Other languages
English (en)
Inventor
Heinz W Winter
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.)
Allis Chalmers Corp
Original Assignee
Allis Chalmers Corp
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 Allis Chalmers Corp filed Critical Allis Chalmers Corp
Priority to US544872A priority Critical patent/US3372881A/en
Priority to GB17518/67A priority patent/GB1118956A/en
Priority to DK214567AA priority patent/DK118748B/da
Priority to SE05738/67A priority patent/SE330816B/xx
Priority to NO167851A priority patent/NO120612B/no
Priority to FR103969A priority patent/FR1520265A/fr
Priority to BE697537D priority patent/BE697537A/xx
Priority to DE19671607434 priority patent/DE1607434A1/de
Priority to FI1213/67A priority patent/FI40957B/fi
Application granted granted Critical
Publication of US3372881A publication Critical patent/US3372881A/en
Assigned to CONNECTICUT NATIONAL BANK THE, A NATIONAL BANKING ASSOCIATION AS TRUSTEE, WOODS KATHLEEN D., AS TRUSTEE reassignment CONNECTICUT NATIONAL BANK THE, A NATIONAL BANKING ASSOCIATION AS TRUSTEE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ALLIS-CHALMERS CORPORATION A DE CORP.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C2/00—Crushing or disintegrating by gyratory or cone crushers
    • B02C2/02—Crushing or disintegrating by gyratory or cone crushers eccentrically moved
    • B02C2/04—Crushing or disintegrating by gyratory or cone crushers eccentrically moved with vertical axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C2/00—Crushing or disintegrating by gyratory or cone crushers
    • B02C2/02—Crushing or disintegrating by gyratory or cone crushers eccentrically moved
    • B02C2/04—Crushing or disintegrating by gyratory or cone crushers eccentrically moved with vertical axis
    • B02C2/047—Crushing or disintegrating by gyratory or cone crushers eccentrically moved with vertical axis and with head adjusting or controlling mechanisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C25/00—Control arrangements specially adapted for crushing or disintegrating

Definitions

  • this invention relates to a new and improved hydraulically adjusted spiderless gyratory Crusher having a unique relief valve system to prevent uncontrolled hydraulic lifting of the crusher head, and to prevent damage to 4the crusher in the event noncrushable objects are fed ⁇ into the Crusher.
  • n gyratory crushers having a hydraulically supported inner crushing member
  • Such a Crusher is designed to provide a lubricating fluid chamber immediately below the Crusher head, which is separate and distinct from the hydraulic support means. Therefore, even though the hydraulic support system may be provided with a relief valve to release the hydraulically supported member, the lubricating fluid pressure in the chamber immediately below the crusher head will tend to maintain the crusher head in place so that the Crusher is not spared from damage.
  • the lubricating fluid chamber immediately below the crusher head may cause other problems even during normal crushing operation.
  • the crusher when the crusher is cold the lubricating fluid in the chamber may be too viscous to readily flow out of the chamber through the narrow bushing interfaces provided.
  • the fluid pressure in the chamber can eventually build to a point where it actually lifts or floats the crusher head olf of its support means to change the setting of the Crusher.
  • Such an uncontrolled change in the crusher setting cannot usually be tolerated.
  • This invention is predicated upon my conception and development of a new and improved hydraulically sup- 3,372,881 Patented Mar. 12, 1968 ported gyratory crusher of the spiderless type having a complete relief valve system which will absolutely lower the Crusher head in the event it encounters a noncrushable object. Furthermore, the relief valve system is so designed that it will prevent uncontrolled uplift of the Crusher head due to pressure buildup in the chamber therebenea-th.
  • lt is another primary object of this invention to pro ⁇ vide a spiderless gyratory Crusher in which uncontrolled Crusher head uplift is eliminated.
  • one preferred embodiment of this invention comprises a base frame housing 10, having a drive housing portion 11 and a cylindrical hub portion 12 extending vertically therefrom at a right angle to the drive housing 11.
  • a sleeve shaped outer frame structure 13 having a llange 14 is concentrically disposed around the cylindrical hub 12 and secured to the base frame housing 10 by a. plurality of radial support struts 15 and by the drive housing l1.
  • a concave upper frame structure 17 having a flange 118 is secured horizontally to the sleeve frame 13 at flange 14 by any means such as a plurality of bolts 19.
  • a removable overhanging concave ring 20 is secured horizontally within the concave upper frame 17 concentrically above the hub 12 by any means such as a plurality of bol-ts 21.
  • the lower end of Crusher post 25 is secured to a piston 27 which is slidably fitted within a cylinder 28 in the lower por tion of the base frame housing 10.
  • a cylinder head 29, provided with a hydraulic uid inlet 30, is secured over the lower cylinder opening by any means such as bolts 31.
  • a check and flow control valve 32 connected to an accumulator (not shown) is provided on a iluid line 33 which feeds the lower portion of cylinder 28.
  • a valve 35 biased by spring 36 against valve seat 37, is disposed within the lower portion of the tubular Crusher post 25 to form a first relief valve assembly.
  • At least one bore 38 is provided through the lower wall of the tubular crusher post 25 communicating between the upper portion of cylindrical space 28 and the hollow inside portion of the tubular crusher post 25 below the rvalve 35.
  • At least one bore 39 is provided through the upper wall of the tubular crusher post 25 immediately below head portion 26 communicating between a conical chamber 40 and the hollow inside portion of the crusher post 25.
  • a pair of circular bearings and seals 42 are provided at the upper and lower extremities of the bore through cylindrical hub 12 to slidably support the crusher post 25 within the hub 12, and to form an annular fluid chamber 43 between the hub 12 and the crusher post 25.
  • a fluid passage means, such as tube 44 is provided to communicate between the annular chamber 43 and the upper surface of the head 26.
  • a second fluid passage means such as bore 45, extends from the annular chamber 43 to a point outside the base frame housing 10.
  • a removable intermediate washer 47 having a hole 48 through the axial center thereof, is disposed on top of head 26 and held in place by any means such as lip 49 at the outer periphery of head 26.
  • a pressure bearing 50 having a convex upper surface and a hole 51 through the axial center thereof slidably rests upon the washer 47.
  • a second pressure bearing 52 having a complementary concave lower surface mates with the pressure bearing 59 to form a step bearing assembly 55.
  • Such step bearing assemblies are well known in the crusher art and need not be further detailed here.
  • a conical crusher head 57 having a cylindrical skirt portion 58 extending downward from the outer periphery thereof, rests upon a support lug 59 which is secured to the upper pressure bearing 52.
  • a conical crusher wearing mantle 619 rests directly over the conical surface of crusher head 57 and is held in place by any means such as nut 61.
  • An annular eccentric member 63 having a ring gear 64 secured to the lower end thereof, is rotatably mounted over the cylindrical hub 12 of the base frame housing 10, and rests against a circular pressure bearing 65 secured to the base frame 10.
  • the thicker wall portion of the eccentric member 63 is provided with a long vertical bore 66 which penetrates the upper horizontal surface of the eccentric 63 but not the lower horizontal surface thereof.
  • a second bore 67 is provided to communicate between the base of bore 66 and a chamber 68 which houses the base of the eccentric 63.
  • a pressure relief valve 69 is disposed within the outer opening of bore 67.
  • a rst bushing 70 is disposed between the eccentric member 63 and the hub 12 to facilitate rotation of the eccentric 63 on hub 12.
  • the outer circumference of the eccentric 63 4 mates with the inner circumference of the skirt 58 on crusher head 57. Accordingly, a second bushing 71 is disposed therebetween to facilitate rotation of the eccentric 63 within the skirt 58.
  • a drive shaft 74 rotatably extending through the drive housing 11 on base frame 10, has a pinion gear 75 secured to the inside end thereof.
  • the pinion gear 75 is in meshing engagement with the ring gear 64.
  • a rotary power source acting on shaft 74 can rotate the pinion gear 75 and in turn rotate the ring gear 64 and eccentric 63 about the hub 12. Rotation of the eccentric 63, within the skirt 58 on crusher head 57, will cause the crusher head 57 and wearing mantle 60 thereon to gyrate relative to ring 20 as necessary for the crushing action.
  • a fluid outlet such as bore 78 is provided to communicate between the chamber 68, which houses the ring gear 64 and pinion gear 75, and outer portion of the base frame housing 10.
  • Suitable dust seal means such as dust ring 80 slidably fitted over extension sleeve 81 on the base frame lil ⁇ and operating in a suitable groove 82 on the crusher head 57 will keep crushed material and dust out of the chamber 68 and away from all internal bearing and gear surface.
  • a hydraulic lubricating uid To place the crusher in a condition for operation, a hydraulic lubricating uid must be pumped through the bore 45 and into the annular chamber 43.
  • the lubricant in chamber 43 will lubricate the bearings and seals 42.
  • the fluid lubricant is forced through tube 44 and hole 48 in washer 47 and hole 51 in pressure bearing 50.
  • the uid will then pass between the washer 47 and convex pressure bearing 50 and between convex pressure bearing d and concave pressure bearing 52 to completely lubricate the step bearing assembly 55. Accordingly, it may be necessary to provide grooves on the surfaces of pressure bearings 50 and 52 to facilitate the iiow of the lubricant.
  • the huid will be collected in chamber 4d until a sufficient uid level and pressure are obtained to force the uid downward lubricating the bushings 70 and 71 in contact with the rotatable eccentric 63.
  • the lubricating uid is collected in chamber 68 to lubricate the intermeshing ring gear 64 and pinion gear 75, and the pressure bearing 65. Excess lubricant will flow out of chamber 68 through bore '78 where it may be collected by any means (not shown) and recirculated.
  • Another hydraulic uid is pumped through inlet 30 in cylinder head 29 and into the lower portion of cylinder 28 to raise the piston 27, crusher post 25, step bearing assembly 55, crusher head 57 and crushing mantle 6G to the desired position of adjustment.
  • the check valve 32 is set to open upon such a sudden increase in pressure whereby the hydraulic fluid in cylinder 28 is forced out of cylinder 2S and into the accumulator (not shown) permitting the piston 27, crusher post 25, step bearing assembly 55, crusher head 57 and wearing mantle 6ft to fall.
  • valve 35 f assures that the crusher head 57 and mantle 60 will fall with the cmsher post 25 and step bearing assembly 55 when a piece of tramp iron or the like is encountered.
  • valve 3S is provided as a pressure relief valve for chamber 40.
  • valve 3S since this valve 3S is designed to quickly pass a substantial volume of fluid upon a sudden and substantial pressure increase, it is not suite-d to relieve slow and moderate pressure increases.
  • pressure relief valve 69 is provided to pass a small amount of fluid from chamber 40 upon a slight increase in pressure to prevent the crusher head 57 from lifting. Accordingly, relief valve 69 is set to open at some pressure less than that necessary to lift the crusher head 57 or to open the dump valve 35. For example, pressure relief valve 69 might be set to open at 5 lbs. per square inch whereas valve 35 should then be set to open at about lbs. per square inch.
  • a spiderless gyratory crusher having a frame, a vertical crusher post slidably supported by said frame, an overhanging concave ring horizontally supported in a fixed position within the upper portion of said trame concentrically above said crusher post, a crusher head mounted on top of said crusher post with a step bearing assembly therebetween and disposed within the space defined by the concave ring, a hydraulically operated piston assembly supporting the lower end of said crusher post and crusher head to vary the opening dened between said concave ring and said crusher head, a check valve for releasing the hydraulic support from said piston assembly upon a sudden increase in pressure, an eccentric sleeve member rotatably supported on said frame concentrically around said crusher post, a skirt member rigid- 1y supported to said crusher head and extending downward to engage the eccentric circumference of said eccentric member and to form a conical chamber between said crusher head and said eccentric mem-ber, and a means for rotating said eccentric sleeve member, in combination therewith, the improvement comprising: valve means
  • a gyratory crusher having a frame, a vertical crusher post slidably supported by said frame, an overhanging concave ring horizontally supported in a xed position within the upper portion of said frame concentrica'lly above said crusher post, a crusher head mounted to top of said crusher post with a step bearing assembly therebetween and disposed within the Space defined by the concave ring, a vertically adjustable piston assembly supporting the lower end of said crusher post and crusher head to vary the opening defined between said concave ring and said crusher head, a check valve for releasing the hydraulic support from said piston assembly upon a sudden increase in pressure, an eccentric sleeve member rotatably supported on said frame concentrically around said crusher post, a skirt member rigidly supported to said crusher head and extending downward to engage the eccentric circumference of said eccentric member and to form a conical chamber between said crusher head and said eccentric member, and a means for rotating said eccentric sleeve member, in combination therewith, the improvement comprising: valve means responsive to a sudden

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Crushing And Grinding (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
US544872A 1966-04-25 1966-04-25 Spiderless gyratory crusher with relief valve system Expired - Lifetime US3372881A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US544872A US3372881A (en) 1966-04-25 1966-04-25 Spiderless gyratory crusher with relief valve system
GB17518/67A GB1118956A (en) 1966-04-25 1967-04-17 Improved gyratory crusher
DK214567AA DK118748B (da) 1966-04-25 1967-04-20 Kegleknuser.
NO167851A NO120612B (cs) 1966-04-25 1967-04-24
SE05738/67A SE330816B (cs) 1966-04-25 1967-04-24
FR103969A FR1520265A (fr) 1966-04-25 1967-04-24 Broyeur giratoire perfectionné
BE697537D BE697537A (cs) 1966-04-25 1967-04-25
DE19671607434 DE1607434A1 (de) 1966-04-25 1967-04-25 Kreiselbrecher
FI1213/67A FI40957B (cs) 1966-04-25 1967-04-25

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US544872A US3372881A (en) 1966-04-25 1966-04-25 Spiderless gyratory crusher with relief valve system

Publications (1)

Publication Number Publication Date
US3372881A true US3372881A (en) 1968-03-12

Family

ID=24173950

Family Applications (1)

Application Number Title Priority Date Filing Date
US544872A Expired - Lifetime US3372881A (en) 1966-04-25 1966-04-25 Spiderless gyratory crusher with relief valve system

Country Status (7)

Country Link
US (1) US3372881A (cs)
BE (1) BE697537A (cs)
DK (1) DK118748B (cs)
FI (1) FI40957B (cs)
GB (1) GB1118956A (cs)
NO (1) NO120612B (cs)
SE (1) SE330816B (cs)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3532277A (en) * 1967-06-09 1970-10-06 Kloeckner Humboldt Deutz Ag Gyratory crusher
US3666188A (en) * 1969-08-19 1972-05-30 Hewitt Robins Inc Gyratory crusher
US4034922A (en) * 1976-06-08 1977-07-12 Allis-Chalmers Corporation Gyratory crusher with bushing assembly between inner eccentric antifriction bearing
WO1979000017A1 (en) * 1977-06-29 1979-01-11 Duval Corp Hydroset pressure relief system
WO2009126085A1 (en) * 2008-04-11 2009-10-15 Sandvik Intellectual Property Ab Crushing apparatus and method of putting it into operation
WO2012087219A1 (en) * 2010-12-20 2012-06-28 Sandvik Intellectual Property Ab Hydraulic circuit and method for controlling a gyratory cone crusher
CN104437728A (zh) * 2014-12-31 2015-03-25 浙江浙矿重工股份有限公司 一种单缸式圆锥破碎机
US20160016174A1 (en) * 2013-03-07 2016-01-21 Sandvik Intellectual Propert Ab Gyratory crusher hydraulic pressure relief valve
WO2016162598A1 (en) * 2015-04-08 2016-10-13 Metso Minerals, Inc. Detection of bridging in gyratory or cone crusher
US20160325287A1 (en) * 2014-01-13 2016-11-10 Metso Minerals, Inc. A crusher, mineral material crushing plant and method for handling a thrust bearing in a crusher
US12053785B1 (en) * 2023-01-17 2024-08-06 Zhekuang Heavy Industry Co., Ltd. Cone crusher and adjustable moving cone assembly thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4192472A (en) * 1978-04-17 1980-03-11 Johnson Louis W Cone crusher
GB2502985B (en) * 2012-06-12 2018-06-06 Terex Gb Ltd Cone crusher

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2079882A (en) * 1931-09-30 1937-05-11 Traylor Engineering & Mfg Comp Crusher and pressure-exerting machinery
US2349790A (en) * 1943-01-30 1944-05-23 Allis Chalmers Mfg Co Gyratory crusher
US2667309A (en) * 1948-11-26 1954-01-26 Allis Chalmers Mfg Co Gyratory crusher
GB770261A (en) * 1954-06-15 1957-03-20 Kloeckner Humboldt Deutz Ag A gyratory crusher

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2079882A (en) * 1931-09-30 1937-05-11 Traylor Engineering & Mfg Comp Crusher and pressure-exerting machinery
US2349790A (en) * 1943-01-30 1944-05-23 Allis Chalmers Mfg Co Gyratory crusher
US2667309A (en) * 1948-11-26 1954-01-26 Allis Chalmers Mfg Co Gyratory crusher
GB770261A (en) * 1954-06-15 1957-03-20 Kloeckner Humboldt Deutz Ag A gyratory crusher

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3532277A (en) * 1967-06-09 1970-10-06 Kloeckner Humboldt Deutz Ag Gyratory crusher
US3666188A (en) * 1969-08-19 1972-05-30 Hewitt Robins Inc Gyratory crusher
US4034922A (en) * 1976-06-08 1977-07-12 Allis-Chalmers Corporation Gyratory crusher with bushing assembly between inner eccentric antifriction bearing
WO1979000017A1 (en) * 1977-06-29 1979-01-11 Duval Corp Hydroset pressure relief system
US4147309A (en) * 1977-06-29 1979-04-03 Duval Corporation Hydroset pressure relief system
WO2009126085A1 (en) * 2008-04-11 2009-10-15 Sandvik Intellectual Property Ab Crushing apparatus and method of putting it into operation
WO2012087219A1 (en) * 2010-12-20 2012-06-28 Sandvik Intellectual Property Ab Hydraulic circuit and method for controlling a gyratory cone crusher
US8496195B2 (en) 2010-12-20 2013-07-30 Sandvik Intellectual Property Ab Hydraulic circuit and method for controlling a gyratory cone crusher
RU2573330C2 (ru) * 2010-12-20 2016-01-20 Сандвик Интеллекчуал Проперти Аб Гидравлический контур и способ управления гираторной конусной дробилкой
AU2011345421B2 (en) * 2010-12-20 2016-03-10 Sandvik Intellectual Property Ab Hydraulic circuit and method for controlling a gyratory cone crusher
US10478823B2 (en) * 2013-03-07 2019-11-19 Sandvik Intellectual Property Ab Gyratory crusher hydraulic pressure relief valve
US20160016174A1 (en) * 2013-03-07 2016-01-21 Sandvik Intellectual Propert Ab Gyratory crusher hydraulic pressure relief valve
US10525476B2 (en) * 2014-01-13 2020-01-07 Metso Minerals, Inc. Crusher, mineral material crushing plant and method for handling a thrust bearing in a crusher
US20160325287A1 (en) * 2014-01-13 2016-11-10 Metso Minerals, Inc. A crusher, mineral material crushing plant and method for handling a thrust bearing in a crusher
CN104437728A (zh) * 2014-12-31 2015-03-25 浙江浙矿重工股份有限公司 一种单缸式圆锥破碎机
WO2016162598A1 (en) * 2015-04-08 2016-10-13 Metso Minerals, Inc. Detection of bridging in gyratory or cone crusher
US10744513B2 (en) 2015-04-08 2020-08-18 Metso Minerals, Inc. Detection of bridging in gyratory or cone crusher
AU2016246032B2 (en) * 2015-04-08 2021-01-28 Metso Finland Oy Detection of bridging in gyratory or cone crusher
US12053785B1 (en) * 2023-01-17 2024-08-06 Zhekuang Heavy Industry Co., Ltd. Cone crusher and adjustable moving cone assembly thereof

Also Published As

Publication number Publication date
DK118748B (da) 1970-09-28
BE697537A (cs) 1967-10-25
NO120612B (cs) 1970-11-09
FI40957B (cs) 1969-03-31
SE330816B (cs) 1970-11-30
GB1118956A (en) 1968-07-03

Similar Documents

Publication Publication Date Title
US3384312A (en) Spiderless gyratory crusher having frictionless bearings
US3372881A (en) Spiderless gyratory crusher with relief valve system
US2079882A (en) Crusher and pressure-exerting machinery
US4391414A (en) Cone crusher
US4615491A (en) Gyratory crusher with automatic tramp iron release
US3417932A (en) Gyratory crusher
US2791383A (en) Hydraulic control for gyratory crusher
JP3595842B2 (ja) 調整式粉砕機
EP1771251A1 (en) Hydraulically adjustable cone crusher
US2349790A (en) Gyratory crusher
US5312053A (en) Cone crusher with adjustable stroke
US3337142A (en) Roller grinding mill and control therefor
US3456889A (en) Spider bearing assembly for gyratory crushers
US5115991A (en) Gyratory cone crusher
JPH02258072A (ja) 旋動破砕機
US3813047A (en) Spider bearing assembly for gyratory crushers
US2908448A (en) Gyratory crusher
US2158779A (en) Crusher
US3743193A (en) Gyratory crusher having anti-spin means for head
US2305616A (en) Shaftless gyratory cone crusher
US3788569A (en) Crusher with hydraulically adjusted rotary assembly for supporting and gyrating a conical head
US3396916A (en) Fluid pressure operated adjustment and release for gyratory crushers and the like
US2634061A (en) Gyratory crusher
US2017108A (en) Crushing apparatus
GB1101699A (en) Improvements in or relating to gyratory crushers

Legal Events

Date Code Title Description
AS Assignment

Owner name: WOODS KATHLEEN D., AS TRUSTEE

Free format text: SECURITY INTEREST;ASSIGNOR:ALLIS-CHALMERS CORPORATION A DE CORP.;REEL/FRAME:004149/0001

Effective date: 19830329

Owner name: CONNECTICUT NATIONAL BANK THE, A NATIONAL BANKING

Free format text: SECURITY INTEREST;ASSIGNOR:ALLIS-CHALMERS CORPORATION A DE CORP.;REEL/FRAME:004149/0001

Effective date: 19830329