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US3698150A Expired / Lapsed US ⏱️ 0.0 years remaining

Bipartite tubular molded synthetic resin furniture part with internal reinforcement

Assignee: Shell USA Inc
•
Filing: 1970-06-04
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Granted: 1972-10-17
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Expires: 1990-06-04
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Abstract

Abstract A bipartite generally tubular molded synthetic resin furniture part, such as a leg for a chair or table or a chair back assembly. The furniture part is composed of two complementary molded synthetic resin tube sections arranged side by side and having mating longitudinal marginal portions bonded to one another so as to define a cavity extending longitudinally through the part. One or both of the tube sections are provided with integral molded synthetic resin reinforcing formations, such as reinforcing ribs or flanges, which extend across the cavity at intervals and are bonded to the opposite tube section in such a way as to reinforce the part against deformation under the load. Additional reinforcement of the part may be provided by a metal rod positioned longitudinally within the cavity and extending through aligned openings in the reinforcing ribs.

Inventors

  • 👤 Victor F Anderson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 08:20
CPC Classifications
A; A47; A47B; A47B91/00

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 234 words
A bipartite tubular molded synthetic resin furniture part with internal reinforcement comprising: a pair of complementary molded synthetic resin tube sections arranged side by side and having mating longitudinal marginal portions disposed in mutual contact and bonded to one another to join said tube sections into a unitary tube, said tube sections together defining a cavity extending longitudinally therethrough and bounded by interior wall surfaces of said tube sections; each of said tube sections including a plurality of integrally molded, plastic reinforcing ribs which project from the interior wall surface of said tube section and extend across said cavity in planes generally perpendicular to the longitudinal axis of said cavity, said plurality of ribs being spaced along the length of said cavity and having projecting end edges which are seated against and bonded to the interior wall surface of the other tube section; the projecting ends of all of said ribs also having openings formed therein which are aligned longitudinally of said cavity; and a metal reinforcing rod extending longitudinally within said cavity and being received by all of said rib openings, the tube cooperatively formed by said pair of tube sections also having interior end surfaces which are engaged by respective ends of said metal reinforcing rod; whereby saiD reinforcing rod is effective to support a portion of any axial load placed upon said tube as well as reinforcing said tube against bending.
Claim 2
Dependent Claim 234 words
A bipartite tubular molded synthetic resin furniture part with internal reinforcement comprising: a pair of complementary molded synthetic resin tube sections arranged side by side and having mating longitudinal marginal portions disposed in mutual contact and bonded to one another to join said tube sections into a unitary tube, said tube sections together defining a cavity extending longitudinally therethrough and bounded by interior wall surfaces of said tube sections; each of said tube sections including a plurality of integrally molded, plastic reinforcing ribs which project from the interior wall surface of said tube section and extend across said cavity in planes generally perpendicular to the longitudinal axis of said cavity, said plurality of ribs being spaced along the length of said cavity and having projecting end edges which are seated against and bonded to the interior wall surface of the other tube section; the projecting ends of all of said ribs also having openings formed therein which are aligned longitudinally of said cavity; and a metal reinforcing rod extending longitudinally within said cavity and being received by all of said rib openings, the tube cooperatively formed by said pair of tube sections also having interior end surfaces which are engaged by respective ends of said metal reinforcing rod; whereby saiD reinforcing rod is effective to support a portion of any axial load placed upon said tube as well as reinforcing said tube against bending.
Claim 3
Dependent Claim 51 words
A furniture part as claimed in claim 1 wherein said rib openings comprise slots which open through the projecting end edge of each of said ribs, whereby said tube sections may be assembled together about said reinforcing rod by placing all of said ribs into straddling relationship with said reinforcing rod.
Claim 4
Dependent Claim 24 words
A furniture part as claimed in claim 1 wherein the ribs on one tube section alternate with the ribs on the other tube section.
Claim 5
Dependent Claim 31 words
A furniture part as claimed in claim 1 wherein each of said tube sections is generally triangular in cross-section, and said tube sections together form a tube of generally rectangular cross-section.

References Cited (Backward Citations)

US2158291A Cited
US2388297A Cited
US3272684A Cited
US3440788A Cited
US3462181A Cited
US3562992A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-10-17 1976-04-17 1976-10-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-10-17 1980-04-17 1980-10-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-10-17 1984-04-17 1984-10-17 $7700.00 Window Closed / Lapsed

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