IP Library › Granted Patent US 12,343,009
Granted Patent B2
US 12,343,009 · App. 17/833,302 · Granted Jul 1, 2025

Motorized surgical handle assembly

Inventors: Andrew Marecki (West Boylston, MA); Leon Amariglio (Lexington, MA); David Thomas Moy, Jr. (Wellesley, MA); Richard Moyer (Allston, MA)
Assignee: Lexington Medical, Inc.
A61B17/072A61B2017/2926
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Quick Facts
Patent No.
US 12,343,009
App. No.
17/833,302
Granted
Jul 1, 2025
Kind
B2
Abstract

The present disclosure includes apparatuses for a motorized surgical handle assembly. An example apparatus includes a non-movable handle, a movable handle configured to be moved away from and into proximity with the non-movable handle, wherein the movable handle comprises a locking protrusion, a selector lever configured to rotate between a locked position and an unlocked position, and a selector cam coupled to the selector lever, wherein the selector cam comprises a surface with a concave locking opening, and wherein the selector cam is configured to rotate in response to the selector lever rotating, wherein, when the movable handle is in proximity with the non-movable handle and the selector lever is in the unlocked position, the surface with the concave locking opening is positioned adjacent to the locking protrusion to lock the movable handle in place.

Claims (47)

1. A motorized surgical handle assembly apparatus, comprising:

a non-movable handle;

a movable handle configured to be moved away from and into proximity with the non-movable handle, wherein the movable handle comprises a locking protrusion;

an electric motor operably coupled to the non-movable handle;

a power trigger configured to selectively activate or deactivate the electric motor;

a selector lever configured to rotate between (i) a locked position in which the power trigger is prevented from selectively activating or deactivating the electric motor and (ii) an unlocked position in which the power trigger is actuatable to selectively activate or deactivate the electric motor; and

a selector cam coupled to the selector lever, wherein the selector cam comprises a surface with a concave locking opening, and wherein the selector cam is configured to rotate in response to the selector lever rotating;

wherein, when the movable handle is in proximity with the non-movable handle and the selector lever is in the unlocked position, the surface with the concave locking opening is positioned adjacent to the locking protrusion to lock the movable handle in place.

2. The apparatus of claim 1 , further comprising:

a gear rack comprising a protrusion; and

a locking cam;

wherein, when the gear rack is positioned in a clamping position, the locking cam is positioned on the gear rack protrusion; and

wherein, when the movable handle is in proximity to the non-movable handle and the gear rack is positioned in a position more distal than the clamping position, the locking cam is positioned in a notch on the movable handle to lock the movable handle in place.

3. The apparatus of claim 1 , further comprising:

a friction cam; and

a spring coupled to the friction cam, wherein the spring is configured to bias the friction cam in a direction of the movable handle;

wherein the friction cam is configured to interact with the movable handle to prevent un-forced movement of the movable handle.

4. The apparatus of claim 3 , wherein the movable handle is in a proximal position when the friction cam is configured to interact with the movable handle to prevent un-forced movement of the movable handle.

5. The apparatus of claim 4 , wherein the motorized surgical handle assembly is coupled to a reloadable cartridge assembly.

6. The apparatus of claim 5 , wherein jaws of the reloadable cartridge assembly are clamped when the movable handle is in the proximal position.

7. The apparatus of claim 6 , wherein the jaws are unclamped when the movable handle is moved distally.

8. The apparatus of claim 6 , wherein the jaws are unclamped when the selector lever is rotated to a reverse position.

9. The apparatus of claim 1 wherein the selector lever (i) is configured to rotate from the locked position to the unlocked position in response to a first user-applied force and (ii) is configured to rotate from the unlocked position to the locked position in response to a second user-applied force.

10. The apparatus of claim 1 wherein the selector lever is configured to be rotatable from the locked position to the unlocked position only when the movable handle has moved into proximity with the non-movable handle.

11. The apparatus of claim 1 wherein the apparatus is tethered to a power cord and does not include a battery.

12. A motorized surgical assembly apparatus, comprising:

a movable handle configured to pivot from a distal position to a proximal position where the movable handle is positioned adjacent to a non-movable handle, wherein when the movable handle is in the proximal position, jaws of a reloadable cartridge assembly are in a clamped position and wherein when the movable handle is in the distal position, the jaws are in an unclamped position;

a gear rack, wherein the gear rack is in a proximal position when the movable handle is in the distal position and the gear rack is in a distal position when the movable handle is in the proximal position;

a circuit board including a ready-to-fire switch;

a selector lever; and

a selector cam including a protrusion, wherein, when the selector lever is rotated to an unlocked position, the protrusion of the selector cam is moved into contact with the ready-to-fire switch and the motorized surgical handle assembly is switched to a ready-to fire mode,

wherein, when the jaws are in the clamped position, the movable handle is configured to move the jaws to the unclamped position when the movable handle is moved from the proximal to the distal position, which moves the gear rack from the distal position to the proximal position; and

wherein, when the jaws are in the clamped position, an electric motor is configured to move the gear rack from the distal position to the proximal position to move the jaws to the unclamped position when a reverse switch is contacted.

13. The apparatus of claim 12 , further comprising a drive train configured to drive the gear rack in a proximal direction when the reverse switch is contacted.

14. The apparatus of claim 13 , further comprising first and second handle halves that provide the non-movable handle when coupled together, wherein the first and second handle halves are configured to house the drive train.

15. The apparatus of claim 12 , further comprising a power trigger, when pulled, the power trigger is configured to press a protrusion of an intermediate lever into contact with a power switch on the circuit board that provides power to a drive train.

16. The apparatus of claim 12 wherein the protrusion of the selector cam is configured to contact the ready-to-fire switch only while the selector lever is in the unlocked position.

17. A motorized surgical handle assembly apparatus, comprising:

a driving gear;

a driven gear;

an electric motor; and

a gear rack movable by the electric motor via the driving gear and the driven gear;

wherein the driving gear and the driven gear each comprise a toothed circumference and first and second surfaces, wherein the first surface on the driving gear faces the first surface on the driven gear, and wherein the driving gear and the driven gear are configured to have noncontinuous contact such that the driven gear may rotate less than 360 degrees without causing rotation of the driving gear and thereafter further rotation of the driven gear will cause rotation of the driving gear.

18. The apparatus of claim 17 , wherein the driving gear comprises at least one boss extending from its first surface and the driven gear comprises an opening on its first surface, wherein the boss is configured to fit inside the opening.

19. The apparatus of claim 17 , wherein the driving gear comprises at least one boss extending from its first surface and the driven gear comprises at least one boss extending from its first surface wherein the two at least one bosses are configured to interact with each other.

20. The apparatus of claim 17 , wherein the motorized surgical handle assembly is coupled to a reloadable cartridge assembly.

21. The apparatus of claim 20 , wherein jaws of the reloadable cartridge assembly are configured to clamp and unclamp without causing rotation of the driving gear.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 6, 2022
From: MARECKI, ANDREW; AMARIGLIO, LEON; MOY, DAVID THOMAS, JR.; MOYER, RICHARD
To: LEXINGTON MEDICAL, INC.
Reel/Frame 060112/0178 →
Continuity (2)
Provisional Application 63197934 · Jun 7, 2021
Related Publication 20220387025A1 · Dec 8, 2022
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