US4070823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chain hook
Assignee: Columbus McKinnon Corp
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Filing: 1976-07-06
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Granted: 1978-01-31
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Expires: 1996-07-06
Abstract
Abstract A hook of the so-called "grab hook" type for engaging a chain of the welded wire link type, which features improved chain link engagement means. The chain receiving throat of the hook is inclined relative to the load lift line of the hook, and the chain link which is centered in the hook is supported upon a flat saddle portion of the hook which extends beyond opposite sides thereof. The hook receives and carries the chain when under load so as to subject the engaged links of the chain to no severe stress increases.
Inventors
- 👤 Kenneth D. Schreyer
- 👤 Soma M. Rohosy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:05
CPC Classifications
F; F16; F16G; F16G17/00; Y; Y10; Y10T; Y10T24/00; Y10T24/45; Y10T24/45225; Y10T24/45969
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
214 words
A chain hook for use in combination with a chain comprising a series of interlinked bent wire type chain links having straight leg portions intermediately of their end portions, said hook including a main body portion of generally U-shaped configuration when viewed in side elevation, comprising a pair of spaced apart generally upstanding legs joined at their lower ends by an integral bight portion, one of said legs terminating at its upper end in a load connection device, said legs being generally parallel but inclined when viewed in said side elevation and defining therebetween a forwardly inclined throat for receiving in downwardly inclined sliding manner a link of said chain to rest in substantially horizontally sidewise reclining attitude transversely of said bight portion, said legs being bevelled at opposite sides thereof to complement the configurations of the ends of the links engaging said horizontally disposed link, said bight portion including a pair of lugs extending transversely outwardly of said bight portion in opposite directions from said hook body and providing therewith a straight horizontal saddle extending across the lugs for supporting said horizontally disposed link, whereby said saddle provides support to said horizontally disposed link regardless of the length of the link without creating localized stresses which would cause said link to fail prematurely.
Claim 2
Dependent Claim
214 words
A chain hook for use in combination with a chain comprising a series of interlinked bent wire type chain links having straight leg portions intermediately of their end portions, said hook including a main body portion of generally U-shaped configuration when viewed in side elevation, comprising a pair of spaced apart generally upstanding legs joined at their lower ends by an integral bight portion, one of said legs terminating at its upper end in a load connection device, said legs being generally parallel but inclined when viewed in said side elevation and defining therebetween a forwardly inclined throat for receiving in downwardly inclined sliding manner a link of said chain to rest in substantially horizontally sidewise reclining attitude transversely of said bight portion, said legs being bevelled at opposite sides thereof to complement the configurations of the ends of the links engaging said horizontally disposed link, said bight portion including a pair of lugs extending transversely outwardly of said bight portion in opposite directions from said hook body and providing therewith a straight horizontal saddle extending across the lugs for supporting said horizontally disposed link, whereby said saddle provides support to said horizontally disposed link regardless of the length of the link without creating localized stresses which would cause said link to fail prematurely.
Claim 3
Dependent Claim
13 words
A chain hook according to claim 1, wherein said saddle is substantially flat.
Claim 4
Dependent Claim
33 words
A chain hook according to claim 2, wherein said lugs are formed with base portions sloping upwardly and outwardly from the bottom of said hook bight portion, reinforced by further outstanding web portions.
Claim 5
Dependent Claim
24 words
A chain hook according to claim 3, wherein said base portions are centrally recessed and reinforced by outstanding rib portions at opposite sides thereof.
Claim 6
Dependent Claim
211 words
A chain hook for use in combination with a chain comprising a series of interlinked bent wire type chain links having straight leg portions intermediately of their rounded end portions, said hook including in side view a generally U-shaped body portion providing a pair of spaced apart generally upstanding legs joined at their lower ends by an integral bight portion, one of said legs terminating at its upper end in a load connection device, said legs being generally parallel but inclined when viewed in side elevation and defining therebetween a forwardly inclined throat for receiving in downwardly inclined sliding manner a link of said chain to rest in substantially horizontally sidewise reclining attitute transversely of said bight portion, said legs being concave bevelled at opposite sides thereof to complement the configurations of the rounded ends of the links engaging said horizontally disposed link, said bight portion including a pair of lugs extending transversely outwardly of said bight portion in opposite directions from said hook body and providing therewith a straight horizontal saddle extending across the lugs for supporting said horizontally disposed link, whereby said saddle provides support to said horizontally disposed link regardless of the length of the link without creating localized stresses which would cause said link to fail prematurely.
Claim 7
Dependent Claim
211 words
A chain hook for use in combination with a chain comprising a series of interlinked bent wire type chain links having straight leg portions intermediately of their rounded end portions, said hook including in side view a generally U-shaped body portion providing a pair of spaced apart generally upstanding legs joined at their lower ends by an integral bight portion, one of said legs terminating at its upper end in a load connection device, said legs being generally parallel but inclined when viewed in side elevation and defining therebetween a forwardly inclined throat for receiving in downwardly inclined sliding manner a link of said chain to rest in substantially horizontally sidewise reclining attitute transversely of said bight portion, said legs being concave bevelled at opposite sides thereof to complement the configurations of the rounded ends of the links engaging said horizontally disposed link, said bight portion including a pair of lugs extending transversely outwardly of said bight portion in opposite directions from said hook body and providing therewith a straight horizontal saddle extending across the lugs for supporting said horizontally disposed link, whereby said saddle provides support to said horizontally disposed link regardless of the length of the link without creating localized stresses which would cause said link to fail prematurely.
Claim 8
Dependent Claim
33 words
A chain hook according to claim 5, wherein said lugs are formed with base portions sloping upwardly and outwardly from the bottom of said hook bight portion, reinforced by further outstanding web portions.
Claim 9
Dependent Claim
24 words
A chain hook according to claim 6, wherein said base portions are centrally recessed and reinforced by outstanding rib portions at opposite sides thereof.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-30 | 1981-08-01 | 1982-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-30 | 1985-08-01 | 1986-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-30 | 1989-08-01 | 1990-01-31 | $7700.00 | Window Closed / Lapsed |