US4209681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pull switch
Assignee: Mannesmann Demag AG
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Filing: 1978-12-11
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Granted: 1980-06-24
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Expires: 1998-12-11
Abstract
Abstract A suspended pull or control switch is provided for overhead mechanical devices, such as power hoists, in which the control switch is so suspended and configured to be physiologically oriented with respect to the attendant's position that the attendant may grasp and visually consult the switch over a long period of time without becoming as fatigued as is the case with conventionally positioned switches. This is achieved by configuring the body of the switch, or at least that portion grasped, to be angled from the vertical axis of suspension of the switch to that degree necessary for the handle portion to be ergonomically work-oriented with the attendant's hand and angle of vision. A dual control switch may be utilized in which both hands of the attendant would be conformed to.
Inventors
- 👤 Gunter Somborn
- 👤 Johannes Kluge
- 👤 Dirk Rotthaus
- 👤 Heinz Hasselmann
- 👤 Uwe Lichtenvort
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:30
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/02; H01H9/0214
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
123 words
A pull switch for operating a hoist or the like, said pull switch suspended from said hoist, comprising (a) a switch body; (b) a plurality of switch operating keys on the front side of said body; the improved characterized by (c) said switch body being the handle for said pull switch; (d) whereby all said switch operating keys are within reach of the thumb when grasping said body; (e) said switch body suspended from at least one support line; (f) the connection of said support line being above the center of gravity of said switch body; (g) said entire body being angled from the vertical axis of said support line; and (h) said angle being ergonomically favorable for an attendant grasping said handle.
Claim 2
Dependent Claim
123 words
A pull switch for operating a hoist or the like, said pull switch suspended from said hoist, comprising (a) a switch body; (b) a plurality of switch operating keys on the front side of said body; the improved characterized by (c) said switch body being the handle for said pull switch; (d) whereby all said switch operating keys are within reach of the thumb when grasping said body; (e) said switch body suspended from at least one support line; (f) the connection of said support line being above the center of gravity of said switch body; (g) said entire body being angled from the vertical axis of said support line; and (h) said angle being ergonomically favorable for an attendant grasping said handle.
Claim 3
Dependent Claim
15 words
The apparatus of claim 1, further characterized by (a) said angle being about 20 degrees.
Claim 4
Dependent Claim
66 words
The apparatus of claim 1, further characterized by (a) a top cap on said body; (b) two support lines connected to said top cap; (c) the said support line connections to said cap being spaced from each other on the side thereof facing the front of said body; and (d) electric lines extending through said cap on the side thereof facing the rear of said body.
Claim 5
Dependent Claim
17 words
The apparatus of claim 3, further characterized by (a) a length adjusting device on said support lines.
Claim 6
Dependent Claim
33 words
The apparatus of claim 3, further characterized by said body including (a) a front casing half; (b) a rear casing half; and (c) said front and rear halves including cooperating joined side walls.
Claim 7
Dependent Claim
52 words
The apparatus of claim 5, further characterized by (a) the side walls of said rear casing half being longer than the side walls of said front casing half; and (b) said side walls of said rear casing half being tapered toward the rear, starting from the juncture with said front casing half.
Claim 8
Dependent Claim
37 words
The apparatus of claim 5, further characterized by said cooperating joined side walls including (a) a continuous ridge on said rear casing half; and (b) a continuous groove on said front casing half for receiving said ridge.
Claim 9
Dependent Claim
36 words
The apparatus of claim 3, further characterized by (a) a support pin fixed in said body for each support line; and (b) each said support line extending through said cap and engaging its respective support pin.
Claim 10
Dependent Claim
63 words
The apparatus of claim 3, further characterized by (a) a plurality of spaced switch parts disposed in said body and connected to said electric lines; (b) a plurality of spaced projections in said body for supporting said parts and maintaining each said part and associated electric lines positioned; and (c) tips on each said spaced projections for maintaining said parts and lines segregated.
Claim 11
Dependent Claim
174 words
A pull switch for operating a hoist or the like, said pull switch suspended from said hoist, comprising (a) a switch body; (b) a switch handle forming part of said body; (c) switch operating keys on said handle; the improvement characterized by (d) said handle angled from the vertical axis of said body; (e) said angle being ergonomically favorable for an attendant grasping said handle; (f) a top cap on said body; (g) two support lines connected to said top cap; (h) the said support line connections to said cap being spaced from each other on the side thereof facing the front of said body; (i) electric lines extending through said cap on the side thereof facing the rear of said body; (j) said body including a front casing half and a rear casing half; (k) said front and rear halves including cooperating joined side walls; (l) the top of said body is integral with said front casing half; and (m) said top cap is connected to the top of said front casing half.
Claim 12
Dependent Claim
174 words
A pull switch for operating a hoist or the like, said pull switch suspended from said hoist, comprising (a) a switch body; (b) a switch handle forming part of said body; (c) switch operating keys on said handle; the improvement characterized by (d) said handle angled from the vertical axis of said body; (e) said angle being ergonomically favorable for an attendant grasping said handle; (f) a top cap on said body; (g) two support lines connected to said top cap; (h) the said support line connections to said cap being spaced from each other on the side thereof facing the front of said body; (i) electric lines extending through said cap on the side thereof facing the rear of said body; (j) said body including a front casing half and a rear casing half; (k) said front and rear halves including cooperating joined side walls; (l) the top of said body is integral with said front casing half; and (m) said top cap is connected to the top of said front casing half.
Claim 13
Dependent Claim
117 words
A pull switch for operating a hoist or the like, said pull switch suspended from said hoist, comprising (a) a switch body; (b) a switch handle forming part of said body; (c) switch operating keys on said handle; the improvement characterized by (d) said handle angled from the vertical axis of said body; (e) said angle being ergonomically favorable for an attendant grasping said handle; (f) two opposed joined switch bodies; (g) a top cap on said joined switch bodies; (h) two support lines connected to said joined switch bodies; (i) said support lines being spaced from each other with one each connected to one of said switch bodies; and (j) electric lines connected through said cap.
Claim 14
Dependent Claim
117 words
A pull switch for operating a hoist or the like, said pull switch suspended from said hoist, comprising (a) a switch body; (b) a switch handle forming part of said body; (c) switch operating keys on said handle; the improvement characterized by (d) said handle angled from the vertical axis of said body; (e) said angle being ergonomically favorable for an attendant grasping said handle; (f) two opposed joined switch bodies; (g) a top cap on said joined switch bodies; (h) two support lines connected to said joined switch bodies; (i) said support lines being spaced from each other with one each connected to one of said switch bodies; and (j) electric lines connected through said cap.
Claim 15
Dependent Claim
28 words
The apparatus of claim 11, further characterized by (a) the front faces of said joined switch bodies are positioned at an angle of 140 degrees to each other.
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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) | 1983-06-24 | 1983-12-24 | 1984-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-24 | 1987-12-24 | 1988-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-24 | 1991-12-24 | 1992-06-24 | $7700.00 | Window Closed / Lapsed |