Patent US2152047A successfully refreshed from Google Patents.
Patent US3650522A successfully refreshed from Google Patents.
US3650522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical clamping device, in particular machine vice
Assignee: Gressel AG
•
Filing: 1969-12-01
•
Granted: 1972-03-21
•
Expires: 1989-12-01
Abstract
Abstract A clamp member for a vice or the like. A hollow spindle is threaded into a stationary block and carries a slide member thereon and a drive rod therein. A limited-torque clutch connects a drive rod to said hollow spindle and solid connecting means connects said manual drive means to said drive rod. Upon rotation of the handle, force is transmitted through the limited-torque clutch to rotate the hollow spindle with respect to the stationary block for advancement of same and simultaneous advancement of the slide until the work-engaging plate initially contacts the workpiece. Thereafter, the clutch slips and force is then applied through the drive rod to force multiplication means and applied to the work-engaging plate for imposing clamping force thereon. The drive rod is only torsionally stressed for most of its length and hence is not subjected to bending forces. It is compressively stressed only for a short distance at the end adjacent the force multiplication means and can at this point be readily and adequately guided.
Inventors
- 👤 Charles Wermuth
- 👤 Heinz Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:44
CPC Classifications
B; B25; B25B; B25B1/00; B25B1/06; B25B1/10; B25B1/103; B25B1/106; B25B1/12; B25B1/125
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
183 words
A mechanical clamping device having a hollow spindle rotatably supported in a slide member, said hollow spindle being threadably engageable in a stationary bearing block and drivable by means of a hand crank through a drive shaft and torque coupling, an abutment arranged in said slide member having the front end of said hollow spindle mounted on one side and a pair of toggle levers mounted on the other side, pressure rod means supported for longitudinal movement in said hollow spindle and acting onto said pair of toggle levers by means of a pressure pad, said pressure rod means being movable longitudinally of said hollow spindle only after a disengagement of said torque coupling upon further rotation of the hand crank to thereby press apart said pair of toggle levers, wherein the improvement comprises said pressure rod means and said drive shaft being made of one piece to define a pressure spindle extending lengthwise of said slide member, said pressure spindle having thread means adjacent said pressure pad, said thread means being threadably coupled to said hollow spindle adjacent the front end thereof.
Claim 2
Dependent Claim
183 words
A mechanical clamping device having a hollow spindle rotatably supported in a slide member, said hollow spindle being threadably engageable in a stationary bearing block and drivable by means of a hand crank through a drive shaft and torque coupling, an abutment arranged in said slide member having the front end of said hollow spindle mounted on one side and a pair of toggle levers mounted on the other side, pressure rod means supported for longitudinal movement in said hollow spindle and acting onto said pair of toggle levers by means of a pressure pad, said pressure rod means being movable longitudinally of said hollow spindle only after a disengagement of said torque coupling upon further rotation of the hand crank to thereby press apart said pair of toggle levers, wherein the improvement comprises said pressure rod means and said drive shaft being made of one piece to define a pressure spindle extending lengthwise of said slide member, said pressure spindle having thread means adjacent said pressure pad, said thread means being threadably coupled to said hollow spindle adjacent the front end thereof.
Claim 3
Dependent Claim
84 words
Clamping device according to claim 1, wherein said torque coupling comprises a first clutch sleeve, which is longitudinally movable on said pressure spindle and secured against a relative rotation, has a clutch flange thereon which is in axial engagement with a second clutch sleeve connected to the rear end of said hollow spindle, and a coil spring arranged on said pressure spindle, said coil spring being supported at one end on said first clutch sleeve and at the other end on said pressure spindle.
Claim 4
Dependent Claim
66 words
Clamping device according to claim 2, wherein several radial openings are provided in said hollow spindle and one radial opening is provided in said second clutch sleeve, a releasable clutch pin insertable in a selected one of said openings in said hollow spindle and said opening in said second clutch sleeve for selecting the rotating position of said second clutch sleeve relative to said hollow spindle.
Claim 5
Dependent Claim
34 words
Clamping device according to claim 3, including a cap sleeve mounted on one end of said hollow spindle, said cap sleeve having a radial opening therein for receiving the head of said clutch pin.
Claim 6
Dependent Claim
97 words
Clamping device according to claim 1, including a brake ring axially movably mounted on the rear end of said hollow spindle and having an outer cone surface thereon, a coil spring arranged on said hollow spindle and urging said brake ring toward the rear of said hollow spindle, an inner cone surface on said slide member cooperable with said outer cone surface of said brake ring, and means defining a collar on the rear end of said hollow spindle, said collar, upon a forward rotation of said hollow spindle, moving said brake ring and releasing same therewith.
Claim 7
Dependent Claim
38 words
Clamping device according to claim 1, including a stop ring on the front end of said hollow spindle, said stop ring being held by a snap ring and projecting radially outwardly beyond the periphery of said hollow spindle.
Claim 8
Dependent Claim
50 words
Clamping device according to claim 1, wherein the front end of said pressure spindle enters a recess in said pressure pad and wherein a steel ball is mounted in the front end of said hollow spindle, said steel ball engaging the bottom surface of said recess in said pressure pad.
Claim 9
Dependent Claim
32 words
Clamping device according to claim 1, wherein a double thread is provided for threadably coupling both the hollow spindle to the bearing block and also the pressure spindle to the hollow spindle.
References Cited (Backward Citations)
US3400924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |