Patent US4522088A successfully refreshed from Google Patents.
US4522088A
Expired / Lapsed
US
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Tool for opening a pressure cooker
Assignee: Individual
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Filing: 1983-12-19
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Granted: 1985-06-11
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Expires: 2003-12-19
Abstract
Abstract A manually operable hand tool is provided for causing the lid of a pressure cooker to rotate with respect to the underlying vessel of the pressure cooker. The tool is comprised of an elongated handle portion, and a bifurcated gripping head disposed at one extremity of the handle portion. The gripping head is provided with three abutment sites which engage the vertically aligned handles of a sealed pressure cooker. When the handle portion of the tool is downwardly forced, there is a concerted pushing of the vessel and pulling of the lid.
Inventors
- 👤 Malcolm F. Berglund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:53
CPC Classifications
B; B25; B25B; B25B13/00; B25B13/48; B25B13/50; A; A47; A47J; A47J27/00; A47J27/08; A47J27/0804; B25B27/00; B25B27/14
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
227 words
A manually operable hand tool for causing the lid of a pressure cooker to rotate with respect to the underlying vessel of said pressure cooker, and adapted to engage the vertical sides of vertically aligned handles of said lid and vessel, said tool comprising a handle portion elongated about a center axis, and a gripping head disposed at one extremity of said handle portion as a continuous integral extension thereof, said gripping head being of bifurcated configuration and comprised of an arcuately shaped spanning member having first and second extremities and defining an engulfing area, a forward abutment site and a rearward abutment site disposed in facing relationship adjacent said first and second extremities, respectively, said engulfing area extending above said forward abutment site and rearward of said rearward abutment site, and an upper abutment site located on said spanning member within said engulfing area, whereby placement of said tool over the aligned handles of said pressure cooker in a manner such that an upper edge of the lid handle contacts said upper abutment site causes said forward abutment site to contact a vertical side of said lid handle and said rearward abutment site to contact an opposite vertical side of the underlying vessel handle, and subsequent downward motion of said handle portion applies a concerted pushing force to said vessel and pulling force to said lid.
Claim 2
Dependent Claim
227 words
A manually operable hand tool for causing the lid of a pressure cooker to rotate with respect to the underlying vessel of said pressure cooker, and adapted to engage the vertical sides of vertically aligned handles of said lid and vessel, said tool comprising a handle portion elongated about a center axis, and a gripping head disposed at one extremity of said handle portion as a continuous integral extension thereof, said gripping head being of bifurcated configuration and comprised of an arcuately shaped spanning member having first and second extremities and defining an engulfing area, a forward abutment site and a rearward abutment site disposed in facing relationship adjacent said first and second extremities, respectively, said engulfing area extending above said forward abutment site and rearward of said rearward abutment site, and an upper abutment site located on said spanning member within said engulfing area, whereby placement of said tool over the aligned handles of said pressure cooker in a manner such that an upper edge of the lid handle contacts said upper abutment site causes said forward abutment site to contact a vertical side of said lid handle and said rearward abutment site to contact an opposite vertical side of the underlying vessel handle, and subsequent downward motion of said handle portion applies a concerted pushing force to said vessel and pulling force to said lid.
Claim 3
Dependent Claim
33 words
The hand tool of claim 1 wherein said forward and rearward abutment sites are provided with a coating which promotes secure contact of said abutment sites with the handles of said pressure cooker.
Claim 4
Dependent Claim
15 words
The hand tool of claim 1 of monolithic construction and fabricated of a strong metal.
Claim 5
Dependent Claim
19 words
The hand tool of claim 3 having a substantially flat configuration and a thickness between about 1/8" and 1/4".
Claim 6
Dependent Claim
27 words
The hand tool of claim 3 having a configuration defined by two flat parallel surfaces and a continuous perimeter edge surface disposed perpendicularly to said parallel surfaces.
References Cited (Backward Citations)
US4059032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |