US3854699A - Means for protecting the rod of a hydraulic lift jack from damage by the lift chain - Google Patents
Means for protecting the rod of a hydraulic lift jack from damage by the lift chain Download PDFInfo
- Publication number
- US3854699A US3854699A US00450010A US45001074A US3854699A US 3854699 A US3854699 A US 3854699A US 00450010 A US00450010 A US 00450010A US 45001074 A US45001074 A US 45001074A US 3854699 A US3854699 A US 3854699A
- Authority
- US
- United States
- Prior art keywords
- chain
- rod
- lift
- band
- roller
- 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
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/08—Masts; Guides; Chains
Definitions
- a flexible band of suitable material such as nylon or the like is connected at its opposite ends to the lift chain so as to be disposed between the chain and the rod of the lift jack at all times during extension and contraction of the rod.
- the flexible band passes beneath the roller on the upper end of the rod, thus avoiding thecrushing and wearing action that would otherwise occur if the band were run with the chain over the roller.
- FIG. 1 is a side view of the lift truck incorporating the present invention
- FIG. 2 is a front view of the truck shown in FIG. 1;
- FIG. 3 is an enlarged side view of part of the truck shown in FIG. 1 and showing the present invention with the lift carriage in alowered position;
- FIG. 4 is a view similar to FIG. 3 but showing the lift rod extended from the cylinder structure of the jack so as to raise the carriage;
- FIG. "5 is a front view of the structure shown in FIG. 4 with some parts broken away.
- FIGS. 1 and 2 the invention is incorporated in a riding type lift truck having a main frame 11 supported at its rear end by a pair of steerable wheels 13 and at its front end by a pair of drive wheels 14.
- a suitable steering wheel 16 is provided at the operators station 17 which is within the confines of an overhead guard 18.
- a mast or mast structure 19 includes a pair of outer uprights 20, 21 which are interconnected at their bottom by a cross'member l5 and are connected to the truck main frame 11 in a conventional manner.
- a lift carriage 22 is mounted by rollers (not shown) on an inner pair of channel section uprights'23, 24 of the lift truck mast 19.
- the carriage 22 supports a pair of lift forks 26 which are adapted to receive and carry palletized loads and the like.
- the carriage 22 is raised and lowered on the mast by a hydraulic lift jack assembly 27 which includes a central jack 28 and a pair of chain carrying lift jacks 29, 30 disposed on opposite lateral sides of the central jack 28.
- the cylinder structures 31, 32 of the lift jacks 29, 30 are rigidly secured to the cylinder component of the central jack 28 as by welding same to spacer blocks 9 positioned therebetween.
- the cylinder structures 31, 32, 35 are secured at their lower ends to a cross member interconnecting the inner uprights 23, 24.
- the rod of the central jack 28 extends through an opening in the cross member 40 and is secured to the cross member 15.
- the lift jack 30 includes a piston rod 33 which rotatably supports a roller 34 at the upper end thereof on a horizontal pivot axis 36.
- a lift chain 37 is reeved or trained over the roller 34 and has its opposite ends secured, respectively, to the cylinder structure 32 and to the carriage 22.
- One end of the chain 37 is connected to an eye bolt 39 which is fixedly secured to the bracket 38 by a pair of nuts 41.
- the other end of the chain 37 is secured to a bracket 46 at the rear of the carriage 22 by a suitable pin 47.
- the upper end of the rod 33 is U-shaped and includes a pair of upstanding brackets 51, 52with aligned drilled holes 54, 56 supporting a shaft 53 for the roller 34.
- a flexible protective band 61 is secured at its opposite ends to the-lift chain 37 by releasable fastening means 62.
- the protective band 61 is disposed between the chain 37 and the rod 33 at diametrically opposite sides of the. latter and passes between the upstanding brackets 51, 52 and beneath the roller 34. Thus the protective band 61 does not pass over the top of the roller. 34 with the chain 37,
- the upstanding brackets 51, 52 serve as guide means to maintain the band 61 in juxtaposed relation to said chain at diametrically opposite sides of the rod 33.
- the protective band 61 which may be made of nylon I are secured to the chain by releasable fastening means 62 whereby the flexible band 61 can be replaced, should it become excessively worn, without removing the lift chain 37.
- Each of the fastening means 62 includes a bolt 63 having an enlarged head 64, a washer 66 and a nut 67.
- means for raising and lowering said carriage on said mast structure including a lift jack with a cylinder structure supported on said truck and a rod having an upper end extending from thetop of said cylinder structure, a roller carried on said upper end of said rod for rotation about a horizontal axis and a chain trained over said roller and having one end-secured to one of said structures and its other end secured to said carriage, the improvement comprising a flexible protective band passing beneath said roller and between the latter and said upper end of said rod and having-its opposite ends secured to said chain, said band being disposed between said chain and said lift jack at diametrically opposite sides of the latter and operable to prevent said chain from 4 I said roller is rotatably mounted on and between said flanges, and said protective band passes between said flanges and beneath said roller.
Abstract
Description
Claims (5)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00450010A US3854699A (en) | 1974-03-11 | 1974-03-11 | Means for protecting the rod of a hydraulic lift jack from damage by the lift chain |
CA209,332A CA998018A (en) | 1974-03-11 | 1974-09-16 | Means for protecting the rod of a hydraulic lift jack from damage by the lift chain |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00450010A US3854699A (en) | 1974-03-11 | 1974-03-11 | Means for protecting the rod of a hydraulic lift jack from damage by the lift chain |
Publications (1)
Publication Number | Publication Date |
---|---|
US3854699A true US3854699A (en) | 1974-12-17 |
Family
ID=23786392
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00450010A Expired - Lifetime US3854699A (en) | 1974-03-11 | 1974-03-11 | Means for protecting the rod of a hydraulic lift jack from damage by the lift chain |
Country Status (2)
Country | Link |
---|---|
US (1) | US3854699A (en) |
CA (1) | CA998018A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3993286A (en) * | 1976-04-09 | 1976-11-23 | Greene Aubrey E | Low profile air jack |
US4867416A (en) * | 1988-04-08 | 1989-09-19 | American Studio Equipment | Portable hydraulic lift for large lamps and the like |
EP0614847A1 (en) * | 1993-03-12 | 1994-09-14 | Jungheinrich Aktiengesellschaft | Device for preventing damage to a lifting cylinder by a chain of a lift truck |
US5586619A (en) * | 1994-11-25 | 1996-12-24 | Young; Roland O. | Lifting apparatus |
US6264004B1 (en) * | 1997-12-01 | 2001-07-24 | Nissan Motor Co., Ltd. | Mast apparatus and lift truck |
DE102015102402A1 (en) * | 2015-02-20 | 2016-08-25 | Jungheinrich Aktiengesellschaft | Hubanordnung a lift truck and pallet truck |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2419938A (en) * | 1945-10-08 | 1947-05-06 | Elwell Parker Electric Co | Truck hoist mechanism |
US2909358A (en) * | 1956-03-07 | 1959-10-20 | Blackhawk Mfg Co | Portable jack assemblage |
US2979162A (en) * | 1957-01-28 | 1961-04-11 | Yale & Towne Mfg Co | Upright assembly for industrial trucks |
-
1974
- 1974-03-11 US US00450010A patent/US3854699A/en not_active Expired - Lifetime
- 1974-09-16 CA CA209,332A patent/CA998018A/en not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2419938A (en) * | 1945-10-08 | 1947-05-06 | Elwell Parker Electric Co | Truck hoist mechanism |
US2909358A (en) * | 1956-03-07 | 1959-10-20 | Blackhawk Mfg Co | Portable jack assemblage |
US2979162A (en) * | 1957-01-28 | 1961-04-11 | Yale & Towne Mfg Co | Upright assembly for industrial trucks |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3993286A (en) * | 1976-04-09 | 1976-11-23 | Greene Aubrey E | Low profile air jack |
US4867416A (en) * | 1988-04-08 | 1989-09-19 | American Studio Equipment | Portable hydraulic lift for large lamps and the like |
EP0614847A1 (en) * | 1993-03-12 | 1994-09-14 | Jungheinrich Aktiengesellschaft | Device for preventing damage to a lifting cylinder by a chain of a lift truck |
DE4307886A1 (en) * | 1993-03-12 | 1994-09-15 | Jungheinrich Ag | Device for protecting a lifting cylinder against damage by a chain in a lift truck |
US5586619A (en) * | 1994-11-25 | 1996-12-24 | Young; Roland O. | Lifting apparatus |
US6264004B1 (en) * | 1997-12-01 | 2001-07-24 | Nissan Motor Co., Ltd. | Mast apparatus and lift truck |
DE19855202B4 (en) * | 1997-12-01 | 2006-10-26 | Nissan Motor Co., Ltd., Yokohama | Pole arrangement and equipped with a mast lifting truck |
DE102015102402A1 (en) * | 2015-02-20 | 2016-08-25 | Jungheinrich Aktiengesellschaft | Hubanordnung a lift truck and pallet truck |
US10207906B2 (en) | 2015-02-20 | 2019-02-19 | Jungheinrich Aktiengesellschaft | Lifting assembly for a lift truck, and lift truck |
Also Published As
Publication number | Publication date |
---|---|
CA998018A (en) | 1976-10-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
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 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 |
|
AS | Assignment |
Owner name: AC MATERIAL HANDLING CORPORATION, 777 MANOR PARK D Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ALLIS-CHALMERS CORPORATION, A CORP. OF DE.;REEL/FRAME:004615/0183 |
|
AS | Assignment |
Owner name: FIRST NATIONAL BANK OF CHICAGO, THE Free format text: SECURITY INTEREST;ASSIGNOR:AC MATERIAL HANDLING CORPORATION, AN OH CORP;REEL/FRAME:004648/0689 Effective date: 19860731 |
|
AS | Assignment |
Owner name: ALLIS-CHALMERS CORPORATION, BOX 512, MILWAUKEE, WI Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:CONNECTICU NATIONAL BANK, THE;REEL/FRAME:004680/0807 Effective date: 19860714 Owner name: ALLIS-CHALMERS CORPORATION, BOX 512, MILWAUKEE, WI Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:CONNECTICUT NATIONAL BANK, THE;REEL/FRAME:004686/0798 Effective date: 19860719 Owner name: ALLIS-CHALMERS CORPORATION,WISCONSIN Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:CONNECTICUT NATIONAL BANK, THE;REEL/FRAME:004686/0798 Effective date: 19860719 |