US3889929A - Force limited power actuated device - Google Patents
Force limited power actuated device Download PDFInfo
- Publication number
- US3889929A US3889929A US374669A US37466973A US3889929A US 3889929 A US3889929 A US 3889929A US 374669 A US374669 A US 374669A US 37466973 A US37466973 A US 37466973A US 3889929 A US3889929 A US 3889929A
- Authority
- US
- United States
- Prior art keywords
- hoist
- motor
- vessel
- cable
- supported
- 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
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/54—Safety gear
- B66D1/58—Safety gear responsive to excess of load
Definitions
- An electrified overhead, carrier-type material handling system including a power-propelled, hoist-style carrier comprising an electric motor driven cable-type load hoist, the cable of which is suspended in part by a flexible resilient closed vessel filled with liquid connected to fluid pressure responsive switch in the hoist motor circuit for preventing operation of thehoist motor upon the existence of 'a load on the hoist in excess of a predetermined amount.
- the invention relates to power actuated devices comprising controls for preventing operation thereof when overloaded.
- the overhead, monorail, material handling system A comprises a monorail having lower, horizontal flange portions 11 upon which a movable carrier C is supported by spaced pairs of flanged wheels 12 for movement along the rail from one location to another by an electric motor 13.
- the carrier C is provided with a load bar 14 suspended between the two sets of wheels 12 for dependingly supporting an electric motor driven hoist H which includes an electric motor for rotating the cable drum 21 to which a load grab in the form of a hook block G is con nected by a cable 22.
- the cable drum 21 is rotatably supported in the frame 23 of the hoist H and connected to the motor 20 in a conventional manner.
- the travel motor 13 is operated liy.:stop push button switch 42, a forward push button switch 45 and a reverse push button switch 46 all on the pendant control station P, and two limit switches 50,51 mounted on the carrier C and actuated in sequence as the carrier moves along the rail by a cam or trip 52 carried by the rail. Actuation of the switches 50,51 by the cam or trip 52 stops the carrier.
- the switch 92 is normally closed but when a load is lifted by the grab G the member 80 is compressed forcing fluid therein to the fluid actuated switch 92 and if the pressure of the fluid 82 in the member 80 and the conduit 90 reaches a predetermined amount the switch 92 will open to prevent operation of the hoist motor 20.
- a frame having an upwardly facing abutment surface, a cable drum rotatably supported by said frame, an electric motor supported by said frame and connected to said cable drum for rotating said cable drum, a resilient flexible closed toroidal shaped elastomer vessel filled with fluid supported on said abutment surface, a member supported on the upper side of said closed vessel, cable means having one end connected to said cable drum and its other end connected to said member supported on the upper side nected to said vessel and responsive to fluid pressure in said vessel in excess of a predetermined amount for preventing operation of said motor.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
Abstract
Description
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US374669A US3889929A (en) | 1973-06-25 | 1973-06-25 | Force limited power actuated device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US374669A US3889929A (en) | 1973-06-25 | 1973-06-25 | Force limited power actuated device |
Publications (1)
Publication Number | Publication Date |
---|---|
US3889929A true US3889929A (en) | 1975-06-17 |
Family
ID=23477738
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US374669A Expired - Lifetime US3889929A (en) | 1973-06-25 | 1973-06-25 | Force limited power actuated device |
Country Status (1)
Country | Link |
---|---|
US (1) | US3889929A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5662311A (en) * | 1994-02-16 | 1997-09-02 | Harnischfeger Corporation | Lifting apparatus including overload sensing device |
US6022002A (en) * | 1996-10-23 | 2000-02-08 | Kerebel Limited | Apparatus for the assisted handling of a load |
DE202006016043U1 (en) * | 2006-10-17 | 2008-02-28 | M. A. T. Malmedie Antriebstechnik Gmbh | Overload protection of a hoist |
CN105174108A (en) * | 2015-09-01 | 2015-12-23 | 太仓市伦凯自动化设备有限公司 | Lifting hook limiting device applied to hoisting machinery |
CN105776052A (en) * | 2016-05-17 | 2016-07-20 | 无锡石油化工起重机有限公司 | Explosion-proof steel-wire rope type electric block |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2109297A (en) * | 1935-08-14 | 1938-02-22 | Scient Engineering Corp | Hydraulic control for drilling rigs |
US2274339A (en) * | 1939-01-05 | 1942-02-24 | Walter A Loomis | Means for automatic weight control in well drilling |
US2609181A (en) * | 1948-06-01 | 1952-09-02 | Dynamatic Corp | Hoist control |
US2923379A (en) * | 1955-11-21 | 1960-02-02 | Stelzer William | Safety device for elevators |
US3153391A (en) * | 1959-09-23 | 1964-10-20 | Cleveland Crane Eng | Overhead carrier-type material handling system |
US3223385A (en) * | 1962-12-15 | 1965-12-14 | Murakami Sakae | Hoist comprising automatic variable speed winding means |
-
1973
- 1973-06-25 US US374669A patent/US3889929A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2109297A (en) * | 1935-08-14 | 1938-02-22 | Scient Engineering Corp | Hydraulic control for drilling rigs |
US2274339A (en) * | 1939-01-05 | 1942-02-24 | Walter A Loomis | Means for automatic weight control in well drilling |
US2609181A (en) * | 1948-06-01 | 1952-09-02 | Dynamatic Corp | Hoist control |
US2923379A (en) * | 1955-11-21 | 1960-02-02 | Stelzer William | Safety device for elevators |
US3153391A (en) * | 1959-09-23 | 1964-10-20 | Cleveland Crane Eng | Overhead carrier-type material handling system |
US3223385A (en) * | 1962-12-15 | 1965-12-14 | Murakami Sakae | Hoist comprising automatic variable speed winding means |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5662311A (en) * | 1994-02-16 | 1997-09-02 | Harnischfeger Corporation | Lifting apparatus including overload sensing device |
US6022002A (en) * | 1996-10-23 | 2000-02-08 | Kerebel Limited | Apparatus for the assisted handling of a load |
DE202006016043U1 (en) * | 2006-10-17 | 2008-02-28 | M. A. T. Malmedie Antriebstechnik Gmbh | Overload protection of a hoist |
CN105174108A (en) * | 2015-09-01 | 2015-12-23 | 太仓市伦凯自动化设备有限公司 | Lifting hook limiting device applied to hoisting machinery |
CN105776052A (en) * | 2016-05-17 | 2016-07-20 | 无锡石油化工起重机有限公司 | Explosion-proof steel-wire rope type electric block |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SHEPARD NILES CRANE & HOIST CORPORATION, SCHUYLER Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MCNEIL CORPORATION;REEL/FRAME:004849/0814 Effective date: 19840301 Owner name: SHEPARD NILES CRANE & HOIST CORPORATION,NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MCNEIL CORPORATION;REEL/FRAME:004849/0814 Effective date: 19840301 |
|
AS | Assignment |
Owner name: BARCLAYSAMERICAN/BUSINESS CREDIT, INC., 111 FOUNDE Free format text: SECURITY INTEREST;ASSIGNOR:S.N. OPERATING CO., INC., (TO BE RENAMED "SHEPARD NILES, INC.");REEL/FRAME:004871/0682 Effective date: 19880229 Owner name: BARCLAYSAMERICAN/BUSINESS CREDIT, INC.,CONNECTICUT Free format text: SECURITY INTEREST;ASSIGNOR:S.N. OPERATING CO., INC., (TO BE RENAMED "SHEPARD NILES, INC.");REEL/FRAME:004871/0682 Effective date: 19880229 |
|
AS | Assignment |
Owner name: SHEPARD NILES, INC. Free format text: CHANGE OF NAME;ASSIGNOR:SHEPARD NILES CRANE & HOIST CORPORATION;REEL/FRAME:004865/0886 Effective date: 19850328 Owner name: S.N. OPERATING CO., INC., 1100 LIGONIER STREET, LA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SHEPARD NILES INC.;REEL/FRAME:004865/0893 Effective date: 19880229 Owner name: SHEPARD NILES, INC.,NEW YORK Free format text: CHANGE OF NAME;ASSIGNOR:SHEPARD NILES CRANE & HOIST CORPORATION;REEL/FRAME:004865/0886 Effective date: 19850328 Owner name: S.N. OPERATING CO., INC.,PENNSYLVANIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SHEPARD NILES INC.;REEL/FRAME:004865/0893 Effective date: 19880229 |
|
AS | Assignment |
Owner name: SHEPARD NILES, INC. Free format text: CHANGE OF NAME;ASSIGNOR:S.N. OPERATING CO., INC.;REEL/FRAME:004966/0583 Effective date: 19880224 |
|
AS | Assignment |
Owner name: FIDELCOR BUSINESS CREDIT CORPORATION Free format text: SECURITY INTEREST;ASSIGNOR:SHEPARD NILES INC.;REEL/FRAME:005186/0189 Effective date: 19890531 Owner name: SHEPARD NILES INC., 250 NORTH GENESEE ST., MONTOUR Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:BARCLAYS BUSINESS CREDIT, INC., 111 FOUNDERS PLAZA, SUITE 1200 EAST HARTFORD CONNECTICUT 28217;REEL/FRAME:005110/0076 Effective date: 19890526 |
|
AS | Assignment |
Owner name: UNIBANK PLC, A CORPORATION OF THE UNITED KINGDOM, Free format text: SECURITY INTEREST;ASSIGNOR:SHEPARD NILES INC., A NY CORPORATION;REEL/FRAME:005732/0083 Effective date: 19901031 |
|
AS | Assignment |
Owner name: UNIDANMARK ASSETS COMPANY (FORMERLY NAMED UNIBANK Free format text: SECURITY INTEREST;ASSIGNOR:SHEPARD NILES INC.;REEL/FRAME:007432/0477 Effective date: 19901031 |