US3727876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core device for void forming and gasket support in a mold wall
Assignee: Price Brothers Co
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Filing: 1971-11-22
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Granted: 1973-04-17
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Expires: 1991-11-22
Abstract
Abstract Method and apparatus for forming a void through the wall of a pipe during the casting process and supporting a gasket for embedment in the pipe about the void. The apparatus is made in three pieces, including an outer, contoured mold member which engages the pipe form and supports the gasket by engaging one of the faces, a ring shaped sustaining plate which engages an inner edge of the gasket in an interference fit, and an inner mold member which is also contoured, and in conjunction with the outer mold member, defines the void through the wall of the pipe. The inner and outer mold members, which are relatively expensive, can be stripped from the freshly cast concrete pipe at the same time the pipe form is removed and reused in another casting operation, while the relatively inexpensive sustaining ring is retained in the freshly cast pipe to support the gasket and maintain it round until the concrete has cured to sufficient strength to allow the sustaining ring to be removed.
Inventors
- 👤 L Keyser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:10
CPC Classifications
B; B28; B28B; B28B23/00; B28B23/0043; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
108 words
Apparatus for forming a void through a molded wall during fabrication thereof and supporting a gasket for embedment in said wall about said void comprising: a. a sustaining plate including an outer, gasket engaging face, b. an inner mold member including a peripheral, void defining surface and a portion engaging said sustaining plate, c. an outer mold member including an outer, form engaging face, a peripheral, void defining face and a gasket engaging portion, anD d. means for maintaining said sustaining plate and said inner and outer mold members in assembled relationship with each other with a gasket interposed between said outer mold member and said sustaining plate.
Claim 2
Dependent Claim
108 words
Apparatus for forming a void through a molded wall during fabrication thereof and supporting a gasket for embedment in said wall about said void comprising: a. a sustaining plate including an outer, gasket engaging face, b. an inner mold member including a peripheral, void defining surface and a portion engaging said sustaining plate, c. an outer mold member including an outer, form engaging face, a peripheral, void defining face and a gasket engaging portion, anD d. means for maintaining said sustaining plate and said inner and outer mold members in assembled relationship with each other with a gasket interposed between said outer mold member and said sustaining plate.
Claim 3
Dependent Claim
16 words
The apparatus of claim 1 wherein: a. said outer mold member is substantially annular in configuration.
Claim 4
Dependent Claim
32 words
The apparatus of claim 2 wherein: a. said outer, form engaging face of said outer mold member is curved in cross section to conform to the inner surface of a cylindrical form.
Claim 5
Dependent Claim
24 words
The apparatus of claim 3 wherein: a. means is provided adjacent an inner face of said outer mold section defining said gasket engaging portion.
Claim 6
Dependent Claim
27 words
The apparatus of claim 4 wherein: a. said peripheral face of said outer mold member tapers inwardly from said outer face thereof towards said inner face thereof.
Claim 7
Dependent Claim
16 words
The apparatus of claim 1 wherein: a. said sustaining plate is substantially disc shaped in configuration.
Claim 8
Dependent Claim
14 words
The apparatus of claim 6 wherein: a. said sustaining plate is substantially ring shaped.
Claim 9
Dependent Claim
33 words
The apparatus of claim 1 wherein: a. said inner mold member includes a substantially circular base member, and b. an annularly shaped, void defining member attached to the periphery of said base member.
Claim 10
Dependent Claim
31 words
The apparatus of claim 1 further comprising: a. means on said inner mold member for aligning said inner and outer mold members and said aligning plate with respect to each other.
Claim 11
Dependent Claim
56 words
The apparatus of claim 1 wherein: a. said outer mold member is substantially annular, b. said sustaining plate is substantially ring shaped, and c. said inner mold member includes an outwardly projecting annular flange received in said sustaining plate and said outer mold member and aligning said inner and outer mold members and said sustaining plate.
Claim 12
Dependent Claim
31 words
The apparatus of claim 10 wherein: a. said outer mold member is provided with an annular notch adjacent an inner face thereof receiving said annular flange on said inner mold member.
Claim 13
Dependent Claim
29 words
The apparatus of claim 11 further comprising: a. socket means on opposed faces of said inner and outer mold members, and b. pin means received in said socket means.
Claim 14
Dependent Claim
192 words
Apparatus of the type described comprising: a. an inner mold member including: i. a disc shaped base member having an opening through the center thereof, ii. an annular, void defining skirt attached to the periphery of said base member and extending substantially perpendicularly with respect to an inner face thereof, iii. an annular flange mounted on an outer face of said base member substantially concentrically with respect thereto, b. a sustaining ring having an outer, gasket engaging face mounted on said inner mold member in encircling relationship to said annular flange thereof and with an inner face overlying said base member outer face, c. an outer mold member including: i. a gasket engaging relieved portion, ii. a peripheral, void defining face, and iii. an outer, wall form engaging face, d. registering sockets formed in opposed portions of said outer mold member and said flange, e. aligning pins received in said sockets, and f. a bolt member passing through said opening in said base member for clamping said inner and outer mold members and said sustaining ring with a gasket carried thereby in assembled relationship to each other and to a wall form.
Claim 15
Dependent Claim
192 words
Apparatus of the type described comprising: a. an inner mold member including: i. a disc shaped base member having an opening through the center thereof, ii. an annular, void defining skirt attached to the periphery of said base member and extending substantially perpendicularly with respect to an inner face thereof, iii. an annular flange mounted on an outer face of said base member substantially concentrically with respect thereto, b. a sustaining ring having an outer, gasket engaging face mounted on said inner mold member in encircling relationship to said annular flange thereof and with an inner face overlying said base member outer face, c. an outer mold member including: i. a gasket engaging relieved portion, ii. a peripheral, void defining face, and iii. an outer, wall form engaging face, d. registering sockets formed in opposed portions of said outer mold member and said flange, e. aligning pins received in said sockets, and f. a bolt member passing through said opening in said base member for clamping said inner and outer mold members and said sustaining ring with a gasket carried thereby in assembled relationship to each other and to a wall form.
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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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |