US5132089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand-held cryofixation apparatus
Assignee: Individual
•
Filing: 1991-01-31
•
Granted: 1992-07-21
•
Expires: 2011-01-31
Abstract
Abstract A hand-held cryofixation apparatus in the form of a pistol handgrip into which is mounted a pneumatic cylinder and piston rod. A removable adapter and tissue mount is attached to the end of said piston rod. The handgrip is further fashioned with a slot or cutout into which is slidably disposed an L-shaped metal rod, the upturned leg of which supports a mirror finish metal block. Upon activation of the pneumatic cylinder the tissue mount is slammed against the mirror finish metal block which has been precooled by immersion into a cryogen such as liquid nitrogen or helium.
Inventors
- 👤 Fred G. Lightfoot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:52
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/28; G01N1/42
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
68 words
A hand-held cryofixation apparatus comprising: a frame in the form of a piston handgrip into which is mounted a pneumatic cylinder and piston rod, an adapter and tissue mount attached to the end of said piston rod, an L-shaped metal rod slidably disposed in a slot or cutout in said frame, and a metal block with mirror finish attached to the upturned leg of said L-shaped metal rod.
Claim 2
Dependent Claim
68 words
A hand-held cryofixation apparatus comprising: a frame in the form of a piston handgrip into which is mounted a pneumatic cylinder and piston rod, an adapter and tissue mount attached to the end of said piston rod, an L-shaped metal rod slidably disposed in a slot or cutout in said frame, and a metal block with mirror finish attached to the upturned leg of said L-shaped metal rod.
Claim 3
Dependent Claim
20 words
The apparatus as recited in claim 1 wherein said adapter is threadably engaged onto the end of said piston rod.
Claim 4
Dependent Claim
29 words
The apparatus as recited in claim 2 wherein said tissue mount is removably disposed in a recessed seat in said adapter, said recessed seat being formed of magnetic elements.
Claim 5
Dependent Claim
31 words
The apparatus as recited in claim 2 wherein said tissue mount is removably disposed in a recessed seat of said adapter, said recessed seat having magnetic elements in close proximity thereto.
Claim 6
Dependent Claim
31 words
The apparatus as recited in claim 1 wherein said mirror finish of said metal block is disposed to face the line of travel of said piston rod, adapter and tissue mount.
Claim 7
Dependent Claim
24 words
The apparatus as recited in claim 1 wherein said pneumatic cylinder and piston rod can be activated by compressed air charges of predetermined pressure.
Claim 8
Dependent Claim
19 words
The apparatus as recited in claim 1 wherein a trigger actuated air switch is mounted within said piston handgrip.
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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) | 1995-07-21 | 1996-01-20 | 1996-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-21 | 2000-01-20 | 2000-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-21 | 2004-01-20 | 2004-07-21 | $7700.00 | Window Closed / Lapsed |