Patent US3311934A successfully refreshed from Google Patents.
Patent US4320612A successfully refreshed from Google Patents.
US4320612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
End block
Assignee: Resco Products Inc
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Filing: 1980-08-15
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Granted: 1982-03-23
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Expires: 2000-08-15
Abstract
Abstract An end block adapted for use on a kiln car includes a refractory body having a transverse projection at a front end and a transverse recess at a rear end. The recess is dimensioned to receive therewithin a projection on the front end of another block with a loose fit therebetween. A sealing layer of resilient refractory material may be disposed within the recess for contact with the front end projection of another block.
Inventors
- 👤 Ernest H. Jeffries, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:44
CPC Classifications
F; F27; F27D; F27D3/00; F27D3/12; F27D3/123; F27D1/00; F27D1/04; F27D99/00; F27D99/0073
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
165 words
An end block designed for use on a kiln car comprising a refractory body having top and bottom horizontally disposed major faces and two vertically disposed end faces, a transverse projection extending from one end face thereof generally parallel to said major faces and a transverse recess extending into an opposite end face thereof, said recess having means for retaining a layer of resilient refractory material therein without the use of fastening means for contact with a corresponding projection of another block, said retaining means comprising the shape of said recess such that the innermost surface of said recess has a vertical dimension greater than the vertical dimension of any other portion of said recess and whereby the smallest vertical dimension of said recess is greater than the largest vertical dimension of said projection so that said corresponding projection of another block can enter said recess with a loose fit, and said projection having a cross-sectional shape different from the cross-sectional shape of said recess.
Claim 2
Dependent Claim
165 words
An end block designed for use on a kiln car comprising a refractory body having top and bottom horizontally disposed major faces and two vertically disposed end faces, a transverse projection extending from one end face thereof generally parallel to said major faces and a transverse recess extending into an opposite end face thereof, said recess having means for retaining a layer of resilient refractory material therein without the use of fastening means for contact with a corresponding projection of another block, said retaining means comprising the shape of said recess such that the innermost surface of said recess has a vertical dimension greater than the vertical dimension of any other portion of said recess and whereby the smallest vertical dimension of said recess is greater than the largest vertical dimension of said projection so that said corresponding projection of another block can enter said recess with a loose fit, and said projection having a cross-sectional shape different from the cross-sectional shape of said recess.
Claim 3
Dependent Claim
36 words
A block in accordance with claim 1 wherein said recess has a dovetail cross-sectional shape and said cross-sectional shape of said projection is a trapezoid having its largest vertical dimension where said projection joins said body.
Claim 4
Dependent Claim
31 words
A block in accordance with claim 1 wherein said body is provided with at least one opening therethrough extending in a direction generally parallel to said end faces of said body.
Claim 5
Dependent Claim
30 words
A block in accordance with claim 1 wherein said body has a notch in at least one edge at the intersection of said bottom major face and said end faces.
Claim 6
Dependent Claim
33 words
A block in accordance with claim 1 wherein the outermost surface portion of said projection and the innermost surface portion of said recess are generally paralel to said end faces of said block.
Claim 7
Dependent Claim
57 words
A block in accordance with claim 1 wherein said projection extends from said one end face at approximately the middle of the elevation thereof, said projection having converging top and bottom surfaces extending to a vertical surface, and wherein said recess is at about the same elevation as said projection and has a dovetail vertical cross-sectional shape.
Claim 8
Dependent Claim
23 words
A block in accordance with claim 1 wherein said block is made of refractory material comprising andalusite-pyrophyllite ore with a fire clay binder.
Claim 9
Dependent Claim
31 words
A block in accordance with claim 1 further comprising a layer of resilient refractory material retained in said recess by means for retaining said layer comprising said shape of said recess
Claim 10
Dependent Claim
19 words
A block in accordance with claim 8 wherein said layer of resilient refractory material is a ceramic fiber blanket.
Claim 11
Dependent Claim
32 words
A block in accordance with claim 8 wherein said layer of resilient refractory material is a refractory aluminasilica fiber blanket having a thickness of about one-half to about one and one-half inches.
Claim 12
Dependent Claim
102 words
An end block designed for use on a kiln car comprising a refractory body having top and bottom horizontally disposed major faces and two vertically disposed end faces, and a transverse recess extending into one end face of said body, said recess having a shape wherein the innermost surface of said recess has a vertical dimension greater than the vertical dimension of any other portion of said recess, and a layer of resilient refractory material is retained in said recess by means for retaining said layer therein without the use of fastening means, said retaining means comprising said shape of said recess.
Claim 13
Dependent Claim
102 words
An end block designed for use on a kiln car comprising a refractory body having top and bottom horizontally disposed major faces and two vertically disposed end faces, and a transverse recess extending into one end face of said body, said recess having a shape wherein the innermost surface of said recess has a vertical dimension greater than the vertical dimension of any other portion of said recess, and a layer of resilient refractory material is retained in said recess by means for retaining said layer therein without the use of fastening means, said retaining means comprising said shape of said recess.
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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) | 1985-03-22 | 1985-09-21 | 1986-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-22 | 1989-09-21 | 1990-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-22 | 1993-09-21 | 1994-03-23 | $7700.00 | Window Closed / Lapsed |