US4401492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breast prosthesis and method of making the same
Assignee: Individual
•
Filing: 1982-07-06
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Granted: 1983-08-30
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Expires: 2002-07-06
Abstract
Abstract A method of making a mandrel for a breast prosthesis in which a negative cast is formed of the wearer's remaining breast and the area of the missing breast. A positive cast is formed of the negative cast and a model is made of the missing breast. A flexible mold is formed over the modeled breast and a portion of the positive cast. The flexible mold together with the molded breast are removed from the positive cast. An additional flexible mold is formed over the rear of the modeled breast to form a rear wall. The rear wall is removed and the modeled breast is discarded. The forward and rear walls are secured together to form a cavity. Fiberglass resin fill is inserted into the cavity and the resin is cured until it hardens to form the mandrel.
Inventors
- 👤 Arthur M. Pfrommer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:52
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/50; A61F2/52; A61F2/5044; A61F2/5046; A61F2002/5053; Y; Y10; Y10S; Y10S264/00; Y10S264/30; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1056; Y10T156/1057
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
301 words
A method for making a breast prosthesis comprising: (a) forming a negative body cast of the body area comprising at least the missing breast; (b) forming a positive cast from the negative cast and modeling a breast on the positive cast in the area of the missing breast; (c) forming a negative mold over the modeled breast and adjacent portion of the positive body cast; (d) removing the negative mold and modeled breast from the positive body cast; (e) forming a back wall for the negative mold which conforms to the posterior contours of the modeled breast derived from the positive body cast; (f) removing the back wall and the modeled breast from the negative mold and replacing the back wall to form a first cavity defined by the negative mold and back wall; (g) filling the first cavity with a curable resin and curing the resin to form a heat-resistant mandrel conforming to the interior contours of said first cavity; (h) removing the mandrel from the first cavity; (i) coating the mandrel with a film-forming heat-curable silicone resin and curing the film-forming resin to form a shaped first skin on the mandrel; (j) shaping a rear wall to the portion of the mandrel defining the posterior contours of the breast and bonding the shaped rear wall to the first skin; (k) applying to the first skin a transparent film-forming resin and curing the applied resin to form a transparent protective second skin over the first skin; (m) removing the mandrel from the shaped material through an aperture formed in the rear wall to form a second cavity defined by the first and second skins and rear wall; (n) sealing the aperture in the rear wall; and (o) filling this second cavity with a flexible material to complete the breast prosthesis.
Claim 2
Independent Claim
301 words
A method for making a breast prosthesis comprising: (a) forming a negative body cast of the body area comprising at least the missing breast; (b) forming a positive cast from the negative cast and modeling a breast on the positive cast in the area of the missing breast; (c) forming a negative mold over the modeled breast and adjacent portion of the positive body cast; (d) removing the negative mold and modeled breast from the positive body cast; (e) forming a back wall for the negative mold which conforms to the posterior contours of the modeled breast derived from the positive body cast; (f) removing the back wall and the modeled breast from the negative mold and replacing the back wall to form a first cavity defined by the negative mold and back wall; (g) filling the first cavity with a curable resin and curing the resin to form a heat-resistant mandrel conforming to the interior contours of said first cavity; (h) removing the mandrel from the first cavity; (i) coating the mandrel with a film-forming heat-curable silicone resin and curing the film-forming resin to form a shaped first skin on the mandrel; (j) shaping a rear wall to the portion of the mandrel defining the posterior contours of the breast and bonding the shaped rear wall to the first skin; (k) applying to the first skin a transparent film-forming resin and curing the applied resin to form a transparent protective second skin over the first skin; (m) removing the mandrel from the shaped material through an aperture formed in the rear wall to form a second cavity defined by the first and second skins and rear wall; (n) sealing the aperture in the rear wall; and (o) filling this second cavity with a flexible material to complete the breast prosthesis.
Claim 3
Dependent Claim
42 words
The invention of claim 1, wherein the negative mold formed in step (c) is a flexible mold upon which a support casting is formed prior to removal of the negative mold and modeled breast from the positive body cast in step (d).
Claim 4
Dependent Claim
57 words
The invention of claim 2, wherein the back wall of the negative mold is formed by disposing a retaining wall on the support cast around the periphery of the posterior portion of the molded breast to define the perimeter of the back wall and filling the space defined by the retaining wall with a curable liquid resin.
Claim 5
Dependent Claim
28 words
The invention of claim 1, wherein the mandrel is coated in step (i) with a film-forming silicone resin curable at a temperature of at least about 300° F.
Claim 6
Dependent Claim
39 words
The invention of claim 4, wherein the first cavity is filled in step (g) with a fiberglass-reinforced curable resin and cured by action of a catalyst to form a mandrel resistant to temperatures of at least about 300° F.
Claim 7
Dependent Claim
17 words
The invention of claim 4, wherein the film-forming heat-curable silicone resin forming the first skin is flesh-colored.
Claim 8
Dependent Claim
26 words
The invention of claim 6, wherein the transparent film-forming resin applied to the first skin in step (k) is a clear liquid dispersion of silicone rubber.
Claim 9
Dependent Claim
22 words
The invention of claim 7, wherein the second cavity is filled in step (o) with a flexible material comprising a silicone gel.
Claim 10
Dependent Claim
24 words
The invention of claim 3, wherein the space defined by the retaining wall is filled with a curable liquid resin comprising a silicone rubber.
Claim 11
Dependent Claim
28 words
The invention of claim 5, wherein the rear wall in step (j) is shaped from raw rubber and is cured and bonded to the first skin by vulcanization.
Claim 12
Dependent Claim
30 words
The invention of claim 10, wherein a heat-resistant polyester backing is provided for the raw rubber to maintain its shape during vulcanization and wherein the backing is removed after vulcanization.
Claim 13
Dependent Claim
49 words
The method of claim 1, wherein after the rear wall is bonded to the first skin in step (j), a silicone rubber material is applied between the top edge of the first skin and the adjacent portion of the rear wall and shaped to form a smooth transition therebetween.
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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) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |