US3796503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Belt conveyors
Assignee: Dowty Meco Ltd
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Filing: 1971-07-19
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Granted: 1974-03-12
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Expires: 1991-07-19
Abstract
Abstract A belt conveyor having a pair of parallel elongate members carried by a number of support members, known as ''''stools'''', disposed at spaced intervals along the length of the elongate members and roller assemblies supported at spaced intervals between the elongate members to carry the movable belt, wherein each elongate member comprises a plurality of stringers in end to end arrangement and each stool includes means to support a stringer or stringers comprising a channel section member having two parallel sides and a base to receive the stringer between the parallel sides, pins and hole means operative in a loosely fitting manner between the stringer and the channel section member such that the stringer may enter the channel section member between the sides thereof to cause engagement of the pin and hole engagement means to locate the stringer in the endwise sense in the channel section member and locking means engageable between the stringer and the channel section member at least partly by angular movement of the stringer about a longitudinal axis relatively to the channel section member.
Inventors
- 👤 G Dawson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:19
CPC Classifications
B; B65; B65G; B65G21/00; B65G21/02; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7016; Y10T403/7075; Y10T403/7077; Y10T403/7079; Y10T403/7083
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
196 words
A stool and a Stringer for use in a conveyor, the stool including two substantially parallel sides and a base connected to said sides forming a channel section member, an elongated stringer of uniform cross-section located between the sides of the channel section member and having a maximum cross-section dimension slightly greater than the space between said parallel sides, said elongated stringer bearing against the base by movement transverse to its length, a pair of projections on the stringer extending from opposite sides thereof, and a pair of first and second holes, the first hole being in one side and the other in the other side of the channel section member, said first hole being spaced below the top edge of one side of said channel section member and the second hole forming an opening in the other of said sides of said channel section member, one projection on one side of said stringer being received in said first hole and the other projection being received in said second hole by angular movement of the stringer about its longitudinal axis so that said stringer is located endwise in said channel member and locked in position therein.
Claim 2
Dependent Claim
196 words
A stool and a Stringer for use in a conveyor, the stool including two substantially parallel sides and a base connected to said sides forming a channel section member, an elongated stringer of uniform cross-section located between the sides of the channel section member and having a maximum cross-section dimension slightly greater than the space between said parallel sides, said elongated stringer bearing against the base by movement transverse to its length, a pair of projections on the stringer extending from opposite sides thereof, and a pair of first and second holes, the first hole being in one side and the other in the other side of the channel section member, said first hole being spaced below the top edge of one side of said channel section member and the second hole forming an opening in the other of said sides of said channel section member, one projection on one side of said stringer being received in said first hole and the other projection being received in said second hole by angular movement of the stringer about its longitudinal axis so that said stringer is located endwise in said channel member and locked in position therein.
Claim 3
Dependent Claim
25 words
A stool and stringer as claimed in claim 1 wherein the projections comprise the two ends of a pin frictionally secured transversely in the stringer.
Claim 4
Dependent Claim
63 words
A stool and stringer as claimed in claim 2 wherein the stringer cross-section is such that the stringer will fit closely between the two sides of the channel section member whereby transverse movement of the pin against friction after insertion of the stringer into the channel section member will lock the stringer against any substantial angular movement relative to the channel section member.
Claim 5
Dependent Claim
95 words
A stool and stringer as claimed in claim 3 wherein one hole is formed jointly in one side and in the base of the channel section member and is of tapering form from a wide part of the hole in the base to a narrower part of the hole in the side whereby entry of the stringer into the channel section member is such that one projection enters the part of the hole in the base, said angular movement of the stringer moving this projection to the narrower part of the hole in the side.
Claim 6
Dependent Claim
49 words
A stool and stringer as claimed in claim 4 wherein the other of said holes is formed in the other side of the channel section member opposite to the narrow part of the one hole to receive the other of said projections following said angular movement of the stringer.
Claim 7
Dependent Claim
53 words
A stool and stringer as claimed in claim 5 wherein a portion of the surface of the said other of the two sides adjacent to said other hole is inclined away from the said one side, the inclination being such as to facilitate entry of said other projection into the said other hole.
Claim 8
Dependent Claim
104 words
For use in a conveyor of the kind referred to, a stool including a channel section member for the reception of a stringer, the channel section member comprising a base and a pair of parallel sides extending from the base and integrally formed therewith, one hole formed through the base and one side, a part of the one hole in the one side tapering to a narrower width from the width of the part of the one hole in the base, and a second hole formed in the other side oppositely disposed to the said part of the one hole in the one side.
Claim 9
Dependent Claim
104 words
For use in a conveyor of the kind referred to, a stool including a channel section member for the reception of a stringer, the channel section member comprising a base and a pair of parallel sides extending from the base and integrally formed therewith, one hole formed through the base and one side, a part of the one hole in the one side tapering to a narrower width from the width of the part of the one hole in the base, and a second hole formed in the other side oppositely disposed to the said part of the one hole in the one side.
Claim 10
Dependent Claim
46 words
A channel section member as claimed in claim 7 wherein the portion of the other side adjacent to the second hole and remote from the base is inclined inwardly into the second hole from the surface of the said other side facing the said one side.
Claim 11
Dependent Claim
38 words
A channel section member as claimed in claim 8 including a further pair of holes similar to the first and second holes formed in the channel section member at positions spaced from the said first and second holes.
Claim 12
Dependent Claim
48 words
A stool and stringer as claimed in claim 1 wherein the said other of the spaced holes opens as a slot into the edge of one side remote from the base such that the said other projection may enter the slot following said angular movement of the stringer.
Claim 13
Dependent Claim
44 words
A stool and stringeR as claimed in claim 10 wherein the portion of the side containing the other of the spaced holes and remote from the base is bent towards the said other side to assist in retaining the stringer in its engaged position.
Claim 14
Dependent Claim
142 words
A stool and stringer for use in a conveyor of the kind referred to, the stool including two substantially parallel sides and a base arranged as a channel section member, an elongate stringer of uniform cross-section having a maximum cross-section dimension slightly greater than the space between said parallel sides, a projection on the stringer, a hole in one side of the channel section member so arranged that during entry of the stringer transversally of its length into the channel section member the projection engages the hole and angular movement of the stringer about its length engages the stringer in between the said parallel sides and against the base of the channel section member and means forming part of the conveyor adapted to maintain a twisting movement on the stringer during use to maintain the stringer engaged in the channel section member.
Claim 15
Dependent Claim
142 words
A stool and stringer for use in a conveyor of the kind referred to, the stool including two substantially parallel sides and a base arranged as a channel section member, an elongate stringer of uniform cross-section having a maximum cross-section dimension slightly greater than the space between said parallel sides, a projection on the stringer, a hole in one side of the channel section member so arranged that during entry of the stringer transversally of its length into the channel section member the projection engages the hole and angular movement of the stringer about its length engages the stringer in between the said parallel sides and against the base of the channel section member and means forming part of the conveyor adapted to maintain a twisting movement on the stringer during use to maintain the stringer engaged in the channel section member.
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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) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |