US3835860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical bone punch
Assignee: Individual
•
Filing: 1973-06-21
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Granted: 1974-09-17
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Expires: 1993-06-21
Abstract
Abstract A surgical instrument for punching holes in bone or other substantially solid matter such as cartilaginous tissue. A relatively easy to operate trigger mechanism permits a very large force to be applied to the punch to penetrate the bone. The punch is advanced incrementally by means of a ratchet mechanism, and a reversible floating ratchet assembly permits the instrument to supply substantially the same force to an elongated surgical punch for both driving and retracting purposes. The device may also be used for cutting hard tissue or shaping other materials such as surgical metal plates due to the large forces which it is capable of developing.
Inventors
- 👤 H Garretson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:08
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/32; B26F1/36; A; A61; A61B; A61B17/00; A61B17/16; A61B17/1604; A61B17/1606; A61B17/1608; A61B17/1611; B26F2001/365
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
112 words
A surgical instrument for shaping or penetrating bone or other substantially solid material, said instrument comprising: a body having a forward end, a rearward end and a handle projecting transversely of said rearward end; a rearward facing foot plate mounted to the forward end of said body; an elongated rod longitudinally movable in said body and having its forward end provided with a cutting edge, said forward end being arranged for confronting engagement with said foot plate; a lever pivotally mounted to said body; and first ratchet means in said body coupled to said lever for incrementally driving said rod toward said foot plate in response to oscillating movement of said lever.
Claim 2
Dependent Claim
112 words
A surgical instrument for shaping or penetrating bone or other substantially solid material, said instrument comprising: a body having a forward end, a rearward end and a handle projecting transversely of said rearward end; a rearward facing foot plate mounted to the forward end of said body; an elongated rod longitudinally movable in said body and having its forward end provided with a cutting edge, said forward end being arranged for confronting engagement with said foot plate; a lever pivotally mounted to said body; and first ratchet means in said body coupled to said lever for incrementally driving said rod toward said foot plate in response to oscillating movement of said lever.
Claim 3
Dependent Claim
38 words
The surgical instrument of claim 1 and further comprising a second ratchet means in said body coupled to said lever for incrementally retracting said rod from said foot plate in response to said oscillating movement of said lever.
Claim 4
Dependent Claim
32 words
The surgical instrument of claim 2 and further comprising selector means for selectively actuating one of said ratchet means for moving said rod in response to said oscillating movement of said lever.
Claim 5
Dependent Claim
62 words
The surgical instrument of claim 1 and further comprising: guide means formed with said foot plate and mounted between said foot plate and said body; and a base member mounted to said guide means in confronting relationship and spaced from said foot plate, said base member being adjustable so as to vary the distance between said foot plate and said base member.
Claim 6
Dependent Claim
22 words
The surgical instrument of claim 4 wherein the forward end of said rod passes through said base meMber and said guide means.
Claim 7
Dependent Claim
26 words
The surgical instrument of claim 1 and further comprising: a handle projecting from said body; a spring for normally biasing said lever away from said handle.
Claim 8
Dependent Claim
29 words
The surgical instrument of claim 3 wherein the non-actuated ratchet means remains coupled to said lever and floats freely in said body with said oscillating movement of said lever.
Claim 9
Dependent Claim
53 words
The surgical instrument of claim 3 and further comprising a resilient member mounted to said body for frictional engagement with said rod to hold said rod in place during each return motion of said lever, said return motion of said lever to normal position moving said actuated ratchet means to a new position.
Claim 10
Dependent Claim
71 words
The surgical instrument of claim 3 wherein; each said ratchet means comprises a ratchet rod having a plurality of annular teeth thereon, one said ratchet rod having said teeth facing rearwardly, the second said ratchet rod having said teeth facing forwardly; said selector means including a rocker arm pivotally and slidably mounted to said rod, said rocker arm having a pawl at either end adapted to engage the adjacent ratchet rod.
Claim 11
Dependent Claim
36 words
The surgical instrument of claim 9 wherein said selector means further comprises a selector lever pivotally connected to said body and engaging said rocker arm for positioning said rocker arm to selectively engage said ratchet rods.
Claim 12
Dependent Claim
38 words
The surgical instrument of claim 1 wherein said foot plate is formed with a projection for engaging a surface of said material opposite the side engaged by said rod when said rod is driven toward said foot plate.
Claim 13
Dependent Claim
111 words
A surgical instrument for penetrating bone or other substantially solid tissue, said instrument comprising: a body having a handle projecting therefrom; a foot plate mounted to said body and adapted for placement against a surface of bony structure facing away from said body; an elongated surgical punch rod longitudinally movable in said body and having a cutting edge directed toward a surface of said bony structure facing said body and in alignment with said foot plate; a reversible ratchet assembly in said body; and a lever pivotally interconnecting said ratchet assembly and said punch rod, said lever causing intermittent longitudinal motion of said punch rod when moved in an oscillating manner.
Claim 14
Dependent Claim
111 words
A surgical instrument for penetrating bone or other substantially solid tissue, said instrument comprising: a body having a handle projecting therefrom; a foot plate mounted to said body and adapted for placement against a surface of bony structure facing away from said body; an elongated surgical punch rod longitudinally movable in said body and having a cutting edge directed toward a surface of said bony structure facing said body and in alignment with said foot plate; a reversible ratchet assembly in said body; and a lever pivotally interconnecting said ratchet assembly and said punch rod, said lever causing intermittent longitudinal motion of said punch rod when moved in an oscillating manner.
Claim 15
Dependent Claim
30 words
The surgical instrument of claim 12 wherein said foot plate is formed with a projection extending therefrom for preventing sliding movement of said foot plate with respect to said bone.
Claim 16
Dependent Claim
40 words
The surgical instrument of claim 12 and further comprising selector means for selectively actuating a portion of said ratchet assembly to move said punch rod in a predetermined longitudinal direction in response to said an oscillating motion of said lever.
Claim 17
Dependent Claim
75 words
The surgical instrument of claim 14 and further comprising: guide means formed with said foot plate and mounted between said body and said foot plate; and a base member mounted to said guide means in confronting relationship with and spaced from said foot plate, said base member being adjustable so as to vary the distance between said foot plate and said base member; said punch rod passing through said guide means and said base member.
Claim 18
Dependent Claim
59 words
The surgical instrument of claim 15 wherein: said foot plate provides a bearing surface for the end of said punch rod when said punch rod is driven through said bone; and said base member is adjusted to contact the interior surface of said bony structure and provide a bearing surface when said punch rod is retracted from said bone.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |