WO1999042400B1 - Impact driven hoist - Google Patents

Impact driven hoist

Info

Publication number
WO1999042400B1
WO1999042400B1 PCT/US1999/000796 US9900796W WO9942400B1 WO 1999042400 B1 WO1999042400 B1 WO 1999042400B1 US 9900796 W US9900796 W US 9900796W WO 9942400 B1 WO9942400 B1 WO 9942400B1
Authority
WO
WIPO (PCT)
Prior art keywords
screw gear
rotation
housing
chains
gear
Prior art date
Application number
PCT/US1999/000796
Other languages
French (fr)
Other versions
WO1999042400A3 (en
WO1999042400A2 (en
Inventor
Bruce E Ratcliff
Original Assignee
Bruce E Ratcliff
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 Bruce E Ratcliff filed Critical Bruce E Ratcliff
Priority to EP99903090A priority Critical patent/EP1062178A4/en
Priority to AU23195/99A priority patent/AU2319599A/en
Publication of WO1999042400A2 publication Critical patent/WO1999042400A2/en
Publication of WO1999042400A3 publication Critical patent/WO1999042400A3/en
Publication of WO1999042400B1 publication Critical patent/WO1999042400B1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/18—Power-operated hoists

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Jib Cranes (AREA)

Abstract

A hoist (11, 53) is constructed for powered drive by an impact tool (49). The hoist includes tension means (23, 25, 67) for applying a force in tension to a load. Gear means (35, 37, 91) are operatively associated with the tension means for producing a tension force in the tension means. The gear means include a gear element (15, 27, 93) which provides a positive hold of the produced tension force when the gear means (35, 37, 91) are not being driven. Impact fitting means (43, 99) are connected to the gear element for enabling the gear means to be power driven by an impact tool.

Claims

AMENDED CLAIMS[received by the International Bureau on 08 October 1999 (08.10.99); original claims 1-19 replaced by new claim 1 (2 pages)]
1. A tensioning device comprising, an exterior housing providing a main frame for the tensioning device, said exterior housing having a first elongated portion, a screw gear having external threads and mounted for rotation within the first 5 elongated portion of the exterior housing, bearing means for holding the screw gear in position within the elongated portion and for taking up axial thrust developed in the screw gear and for permitting rotation of the screw gear without any longitudinal translation of the screw gear within the housing, a nut gear having internal threads which engage with the external threads of the ϋ screw gear so that rotation of the screw gear causes the nut gear to move longitudinal ly along the axis of rotation of the screw gear with the direction of movement of the nut gear being dependent upon the direction of rotation of the screw gear, two pin jointed link chains, each having an inner end connected to the nut gear within the housing and each having an outer end disposed outside the housing for 5 connection to a load, said housing having an enlarged end portion at a first end of the housing, two idler gears mounted for rotation within the enlarged end portion about axes of rotation which arc disposed normal to a plane containing the axis of rotation of the screw gear, 0 one o the two chains engaging with one of the idler gears and the other of the two chains engaging with the other of the two idler gears as the nut gear is moved longitudinally along the axis of rotation of the screw gear, stationary chain guide means mounted within the enlarged end of the housing between the two idler gears for guiding the chains into engagement with the idler gears, 5 and wherein the idler gears and chain guide means coact with the two pin jointed link chains to minimize twisting of the chains when no tension is produced in the chains and thereby facilitate using the tensioning device at any position or inclination of the tensioning device and screw gear drive means for applying a torque to rotate the screw gear, said screw gear drive means being located at a second end of the exterior housing opposite the end having the enlarged end portion, and wherein the screw gear drive means are located on an axis of rotation which is substantially perpendicular to the direction of movement of the portions of the chains which extend out of the exterior housing and are also located at a distance from said portions of the chains which is substantially equal to the length of the exterior housing between said first and second ends of the exterior housing to thereby facilitate unobstructed access to the screw gear drive means by a portable tool.
PCT/US1999/000796 1998-02-18 1999-01-14 Impact driven hoist WO1999042400A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP99903090A EP1062178A4 (en) 1998-02-18 1999-01-14 Impact driven hoist
AU23195/99A AU2319599A (en) 1998-02-18 1999-01-14 Impact driven hoist

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US2551998A 1998-02-18 1998-02-18
US09/025,519 1998-02-18

Publications (3)

Publication Number Publication Date
WO1999042400A2 WO1999042400A2 (en) 1999-08-26
WO1999042400A3 WO1999042400A3 (en) 1999-09-30
WO1999042400B1 true WO1999042400B1 (en) 1999-12-02

Family

ID=21826556

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/000796 WO1999042400A2 (en) 1998-02-18 1999-01-14 Impact driven hoist

Country Status (3)

Country Link
EP (1) EP1062178A4 (en)
AU (1) AU2319599A (en)
WO (1) WO1999042400A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0815084D0 (en) * 2008-08-18 2008-09-24 Knott Roy W A clamp
ES2609755T3 (en) * 2010-02-22 2017-04-24 Roy William Knott A clamp

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US721946A (en) * 1902-06-02 1903-03-03 Julian A Foster Wire-stretcher.
US1598273A (en) * 1925-01-05 1926-08-31 Benjamin F Fitch Traveling crane
US2368390A (en) * 1944-01-31 1945-01-30 Henry A Winter Electric invalid hoist
US4157171A (en) * 1976-10-26 1979-06-05 Seasafe Transport Ab Tensioning device for chains, wire ropes etc.
US4372452A (en) * 1980-12-24 1983-02-08 Independent Transfer Equipment Co. Transfer hoist for disabled persons
US4961604A (en) * 1989-07-18 1990-10-09 Kisner Richard L Combination step bumper and hoist apparatus
US5623751A (en) * 1995-06-16 1997-04-29 Knutson; Kenneth Retractable binder for securing cargo loads
US5720400A (en) * 1996-11-20 1998-02-24 Altizer, Sr.; Joseph W. Portable hoist device

Also Published As

Publication number Publication date
WO1999042400A3 (en) 1999-09-30
WO1999042400A2 (en) 1999-08-26
EP1062178A4 (en) 2005-06-29
EP1062178A1 (en) 2000-12-27
AU2319599A (en) 1999-09-06

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