Patent US3778094A successfully refreshed from Google Patents.
US3778094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gripping shoe for a traction device adapted for pulling an elongated member
Assignee: IFP Energies nouvelles
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Filing: 1972-07-21
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Granted: 1973-12-11
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Expires: 1992-07-21
Abstract
Abstract A gripping shoe for a traction device adapted for pulling an elongated member, including a rigid body provided with a recess, and forming part of the traction device, a deformable element housed in said recess and integral with said rigid body, said deformable element being provided with gripping means for contacting the elongated member and being constituted of a material resiliently deformable under the action of a compressional stress, substantially without any volume variation of said material, a free space being provided between said deformable element and the walls of said recess so as to accomodate the deformations of said deformable element.
Inventors
- 👤 P Grolet
- 👤 J Thiery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:23
CPC Classifications
E; E21; E21B; E21B19/00; E21B19/22; B; B65; B65G; B65G37/00; B65G2812/00; B65G2812/01; B65G2812/016; B65G2812/018; Y; Y10; Y10S; Y10S294/00; Y10S294/902
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
108 words
A gripping shoe for a traction device for pulling an elongated member, including a rigid body wherein is provided a recess, said body being integral with the traction device, a deformable element housed in said recess and integral with said rigid body, said deformable element being provided with rigid gripping means for contacting the elongated member, wherein said deformable element is made of a material resiliently deformable under the action of a compressional stress, substantially without any variation in the volume of said material, and a free space is provided between said deformable element and the walls of said recess to accomodate the deformations of said deformable element.
Claim 2
Dependent Claim
108 words
A gripping shoe for a traction device for pulling an elongated member, including a rigid body wherein is provided a recess, said body being integral with the traction device, a deformable element housed in said recess and integral with said rigid body, said deformable element being provided with rigid gripping means for contacting the elongated member, wherein said deformable element is made of a material resiliently deformable under the action of a compressional stress, substantially without any variation in the volume of said material, and a free space is provided between said deformable element and the walls of said recess to accomodate the deformations of said deformable element.
Claim 3
Dependent Claim
140 words
A gripping shoe for a traction device for pulling an elongated member, including a rigid body wherein is provided a recess, said body being integral with the traction device, a deformable element housed in said recess and integral with said rigid body, said deformable element being provided with rigid gripping means for contacting the elongated member, wherein said deformable element is made of a material resiliently deformable under the action of a compressional stress, substantially without any variation in the volume of said material and a free space is provided between said deformable element and the walls of said recess to accomodate the deformations of said deformable element, and wherein the end walls of said gripping means have a concave shape bearing on the walls of said recess which are perpendicular to the direction of displacement of the elongated member.
Claim 4
Dependent Claim
140 words
A gripping shoe for a traction device for pulling an elongated member, including a rigid body wherein is provided a recess, said body being integral with the traction device, a deformable element housed in said recess and integral with said rigid body, said deformable element being provided with rigid gripping means for contacting the elongated member, wherein said deformable element is made of a material resiliently deformable under the action of a compressional stress, substantially without any variation in the volume of said material and a free space is provided between said deformable element and the walls of said recess to accomodate the deformations of said deformable element, and wherein the end walls of said gripping means have a concave shape bearing on the walls of said recess which are perpendicular to the direction of displacement of the elongated member.
Claim 5
Dependent Claim
39 words
A gripping shoe according to claim 1, wherein said gripping means is constituted by a plurality of rigid elements anchored in said deformable element, said rigid elements being elongated substantially along the direction of displacement of the elongated element.
Claim 6
Dependent Claim
15 words
A gripping shoe according to claim 1, wherein said deformable element is made of polyurethane.
Claim 7
Dependent Claim
39 words
A gripping shoe according to claim 2, wherein said gripping means is constituted by a plurality of rigid elements anchored in said deformable element, said rigid elements being elongated substantially along the direction of displacement of the elongated element.
Claim 8
Dependent Claim
15 words
A gripping shoe according to claim 2, wherein said deformable element is made of polyurethane.
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |