Patent US3661415A successfully refreshed from Google Patents.
US3661415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hoist system
Assignee: Individual
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Filing: 1969-12-05
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Granted: 1972-05-09
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Expires: 1989-12-05
Abstract
Abstract A hoist system including elevated means having spaced contact points, carrier means disposed below the elevated means, having similarly arranged contact points, cable means operatively interconnecting the contact points for carrying the carrier means below the elevated means, means for varying the effective length of the cable means disposed at a selected contact point, one end of the cable means being fixedly secured to a selected contact point and the opposite end thereof being operatively connected to the cable length varying means whereby upon operation of the cable length varying means the effective length of the cable means will be varied correspondingly to vary the vertical displacement of the carrier means relative to the elevated means.
Inventors
- 👤 Frank N Piasecki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:33
CPC Classifications
B; B66; B66C; B66C1/00; B66C1/10; B66C1/12; B66C1/16; B64; B64D; B64D1/00; B64D1/22
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
257 words
A hoist system comprising elevated means having spaced contact points disposed at the vertices of a rectangle, carrier means disposed below said elevated means, having similarly spaced contact points disposed at the vertices of a rectangle, each of the contact points on said carrier means including a sheave, diagonally opposed contact points on said elevated means being provided with sheaves, cable means operatively interconnecting said contact points for carrying said carrier means below said elevated means, a winch secured to said elevated means at a contact point spaced from said diagonally opposed sheaves, and said cable means having one end thereof fixedly secured to said elevated means at a contact point diagonally opposed to said winch, a first segment extending downwardly and reeved under a first sheave disposed on said carrier means, a second segment extending transversely and reeved under a second sheave on said carrier means, a third segment extending upwardly and reeved over one of said diagonally opposed sheaves secured to said elevated means, a fourth segment extending diagonally and reeved over the other of said diagonally opposed sheaves, a fifth segment extending downwardly and reeved under a third sheave secured to said carrier means, a sixth segment extending transversely and reeved under a fourth sheave secured to said carrier means and a seventh segment extending upwardly and being operatively connected to said winch whereby upon operation of said winch, the effective length of said cable means will be varied to vary correspondingly the vertical disposition of said carrier means relative to said elevated means.
Claim 2
Dependent Claim
257 words
A hoist system comprising elevated means having spaced contact points disposed at the vertices of a rectangle, carrier means disposed below said elevated means, having similarly spaced contact points disposed at the vertices of a rectangle, each of the contact points on said carrier means including a sheave, diagonally opposed contact points on said elevated means being provided with sheaves, cable means operatively interconnecting said contact points for carrying said carrier means below said elevated means, a winch secured to said elevated means at a contact point spaced from said diagonally opposed sheaves, and said cable means having one end thereof fixedly secured to said elevated means at a contact point diagonally opposed to said winch, a first segment extending downwardly and reeved under a first sheave disposed on said carrier means, a second segment extending transversely and reeved under a second sheave on said carrier means, a third segment extending upwardly and reeved over one of said diagonally opposed sheaves secured to said elevated means, a fourth segment extending diagonally and reeved over the other of said diagonally opposed sheaves, a fifth segment extending downwardly and reeved under a third sheave secured to said carrier means, a sixth segment extending transversely and reeved under a fourth sheave secured to said carrier means and a seventh segment extending upwardly and being operatively connected to said winch whereby upon operation of said winch, the effective length of said cable means will be varied to vary correspondingly the vertical disposition of said carrier means relative to said elevated means.
Claim 3
Dependent Claim
24 words
A hoist system according to claim 1 wherein said carrier means comprises a pallet to which a load to be hoisted may be secured.
Claim 4
Dependent Claim
42 words
A hoist system according to claim 2 wherein the underside of said pallet includes spaced means engageable by said load and means centrally disposed on said pallet operatively connectable to said load for retaining said load into engagement with said spaced means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |