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US3758078A Expired / Lapsed US ⏱️ 0.0 years remaining

Water pump hoist

Assignee: Individual
•
Filing: 1971-06-02
•
Granted: 1973-09-11
•
Expires: 1991-06-02
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Abstract

Abstract A hoist for raising or lowering an electrically driven water pump into or out of a well, i.e., the pump being suspended by a length of flexible conduit. The hoist includes a main support member which is mounted on a hand truck-like base member, a pair of reels rotatably mounted on the support member, i.e., a main reel for receiving the flexible conduit and an auxiliary reel for receiving the electrical power cord, and a brake gear motor which rotatably drives the main reel selectively in forward and reverse directions, i.e., respectively winding the flexible conduit about the main reel for hoisting the pump out of the well and unwinding the conduit from the main reel for lowering the pump into the well, knockdown structure is incorporated throughout to facilitate expeditious disassembly of the various components one from the other, a feature of great importance, particularly at locations where the head of the well is enclosed in a cramped pumphouse.

Inventors

  • 👤 J Grenn

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 07:44
CPC Classifications
F; F04; F04B; F04B47/00; F04B47/06; B; B66; B66D; B66D1/00; B66D1/02; B66D1/12; E; E21; E21B; E21B19/00; E21B19/22; B66D2700/00; B66D2700/01; B66D2700/0125; B66D2700/0141

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 339 words
A hoist for a water pump which may be suspended in a well by a predetermined length of flexible conduit, said hoist comprising a hand truck, a horizontally disposed shaft means, bifurcated main support means mounted on said hand truck and including left and right stanchions, the upper ends of said left and right stanchions terminating with semi-cylindrical bearing surfaces, said shaft being rotatably received upon said bearing surfaces, said left stanchion additionally including a first horizontally disposed platform positioned adjacent the upper end thereof, main reel means for receiving convolute windings of the flexible conduit, said left and right stanchions of said main support means straddling said main reel means with said shaft means extending through said main reel means concentrically thereof and being fixedly attached thereto, large diameter spur gear means concentrically disposed relative to said shaft means and fixedly coupled thereto, a second horizontally disposed platform contiguously engaging and supported by said first platform, said second platform including tubular bushing means fixedly attached at one end thereof, said bushing means rotatably receiving one end of said shaft means, pin means fixedly attached to said bushing means to secure said main reel means to said main support means, said pin means having proximal and distal ends thereto, said proximal end of said pin means being fixedly attached to said bushing means and said distal end thereof extending inwardly beyond said bushing means a predetermined distance and being radially arranged about said bushing means so that said distal end thereof engages a portion of the underneath surface of said first platform, brake gearmotor means mounted on said second platform, said brake gearmotor means including a rotatably driven small diameter spur gear means, said small spur gear means meshingly engaging said large spur gear means so that rotation of said small spur gear means causes said main reel means to rotate, and means for operably energizing said brake gearmotor means selectively in forward and reverse directions for respectively winding and unwinding the flexible conduit about said main reel means.
Claim 2
Dependent Claim 339 words
A hoist for a water pump which may be suspended in a well by a predetermined length of flexible conduit, said hoist comprising a hand truck, a horizontally disposed shaft means, bifurcated main support means mounted on said hand truck and including left and right stanchions, the upper ends of said left and right stanchions terminating with semi-cylindrical bearing surfaces, said shaft being rotatably received upon said bearing surfaces, said left stanchion additionally including a first horizontally disposed platform positioned adjacent the upper end thereof, main reel means for receiving convolute windings of the flexible conduit, said left and right stanchions of said main support means straddling said main reel means with said shaft means extending through said main reel means concentrically thereof and being fixedly attached thereto, large diameter spur gear means concentrically disposed relative to said shaft means and fixedly coupled thereto, a second horizontally disposed platform contiguously engaging and supported by said first platform, said second platform including tubular bushing means fixedly attached at one end thereof, said bushing means rotatably receiving one end of said shaft means, pin means fixedly attached to said bushing means to secure said main reel means to said main support means, said pin means having proximal and distal ends thereto, said proximal end of said pin means being fixedly attached to said bushing means and said distal end thereof extending inwardly beyond said bushing means a predetermined distance and being radially arranged about said bushing means so that said distal end thereof engages a portion of the underneath surface of said first platform, brake gearmotor means mounted on said second platform, said brake gearmotor means including a rotatably driven small diameter spur gear means, said small spur gear means meshingly engaging said large spur gear means so that rotation of said small spur gear means causes said main reel means to rotate, and means for operably energizing said brake gearmotor means selectively in forward and reverse directions for respectively winding and unwinding the flexible conduit about said main reel means.
Claim 3
Dependent Claim 55 words
The hoist of claim 1 in which is included auxiliary reel means for wrapping certain ancillary structure thereon, and auxiliary support means for rotatably supporting said auxiliary reel means on said main support means, said auxiliary support means includes knockdown means to facilitate expeditious disassembly of said auxiliary support means from said main support means.
Claim 4
Dependent Claim 54 words
The hoist of claim 1 in which is included swivel means for pivoting said main reel means about a vertical axis so that said main reel means may be swiveled back and forth to convolutely wrap uniformly thereon a plurality of turns of the flexible conduit as said main reel means is rotatably driven.
Claim 5
Dependent Claim 111 words
The hoist of claim 3 in which said main reel means includes a concentric cylinder member; a pair of outwardly canted annular flange members, means supporting said cylinder member a predetermined distance outwardly from said shaft, and a wire rope member; said cylinder member including a pair of inwardly folded portions partially defining an open segment of said cylinder member, said open segment allowing the passing therethrough of said wire rope member and enlarged protruding ancillary members of the flexiBle conduit, said wire rope having the one end thereof fixedly attached to said shaft and the other end thereof being free to grippingly engage the one end of the flexible conduit.
Claim 6
Dependent Claim 30 words
The hoist of claim 4 in which said main reel support means additionally includes knockdown means to facilitate expeditious disassembly of said second platform from said main reel support means.

References Cited (Backward Citations)

US3104890A Cited
US2440681A Cited
DE874842C Cited
US3091413A Cited
GB989066A Cited
US3165109A Cited
US3270982A Cited
GB1167662A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-09-10 1977-03-12 1977-09-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-09-10 1981-03-12 1981-09-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-09-10 1985-03-12 1985-09-11 $7700.00 Window Closed / Lapsed

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