US3869934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Belt tensioning tool
Assignee: Individual
•
Filing: 1973-09-12
•
Granted: 1975-03-11
•
Expires: 1993-09-12
Abstract
Abstract A tool for tensioning a belt trained around a pair of relatively movable, peripherally grooved pulleys comprises a body having a chamber open at one end and a wall at the other end having a threaded opening therein, a pair of pulley-engaging members extending from opposite ends of the body. One of the members is rotatably accommodated in the chamber of the body and the other of the members has a threaded shank which is accommodated in the threaded wall of the chamber, and each of the members has an arcuate bearing arm adapted to be accommodated in the grooves of the respective pulleys so as to bear against the latter and be restrained against rotation relative to the pulleys. The body preferably has a fairly large diameter and a multi-sided exterior so as to enable it to be rotated by hand or by a wrench, whereupon that member having the threaded shank will be extended or retracted relatively to the body so as to increase or decrease the overall length of the tool. The member which extends into the chamber preferably has a socket for the accommodation of the threaded shank or for one end of an extension, which may be interposed between the body and such member so as to enable the overall length of the tool to be varied independently of the threaded member.
Inventors
- 👤 Philip F Pierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:35
CPC Classifications
F; F16; F16H; F16H7/00; F16H7/24; Y; Y10; Y10T; Y10T403/00; Y10T403/57; Y10T403/5733
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
168 words
A tool for tensioning a belt trained about a pair of spaced apart pulleys at least one of which is movable toward and away from the other, said tool comprising a body adapted to be interposed between said pulleys and defining a chamber open at one end of said body and a threaded opening at its other end communicating with said chamber; a first member having one end thereof, rotatably and slidably accommodated in said chamber, bearing against said body, the other end of said first member extending outwardly from said one end of said body; a second member having a threaded shank at one end thereof accommodated in said opening and extending from said other end of said body into said chamber in sliding telescoping, relative rotating relation with said one end of said first member; and bearing means at other ends of said members for engagement with said pulleys, whereby rotation in one direction of said body, relative to said members effects elongation of said tool.
Claim 2
Dependent Claim
168 words
A tool for tensioning a belt trained about a pair of spaced apart pulleys at least one of which is movable toward and away from the other, said tool comprising a body adapted to be interposed between said pulleys and defining a chamber open at one end of said body and a threaded opening at its other end communicating with said chamber; a first member having one end thereof, rotatably and slidably accommodated in said chamber, bearing against said body, the other end of said first member extending outwardly from said one end of said body; a second member having a threaded shank at one end thereof accommodated in said opening and extending from said other end of said body into said chamber in sliding telescoping, relative rotating relation with said one end of said first member; and bearing means at other ends of said members for engagement with said pulleys, whereby rotation in one direction of said body, relative to said members effects elongation of said tool.
Claim 3
Dependent Claim
168 words
A tool for tensioning a belt trained about a pair of spaced apart pulleys at least one of which is movable toward and away from the other, said tool comprising a body adapted to be interposed between said pulleys and defining a chamber open at one end of said body and a threaded opening at its other end communicating with said chamber; a first member having one end thereof, rotatably and slidably accommodated in said chamber, bearing against said body, the other end of said first member extending outwardly from said one end of said body; a second member having a threaded shank at one end thereof accommodated in said opening and extending from said other end of said body into said chamber in sliding telescoping, relative rotating relation with said one end of said first member; and bearing means at other ends of said members for engagement with said pulleys, whereby rotation in one direction of said body, relative to said members effects elongation of said tool.
Claim 4
Dependent Claim
168 words
A tool for tensioning a belt trained about a pair of spaced apart pulleys at least one of which is movable toward and away from the other, said tool comprising a body adapted to be interposed between said pulleys and defining a chamber open at one end of said body and a threaded opening at its other end communicating with said chamber; a first member having one end thereof, rotatably and slidably accommodated in said chamber, bearing against said body, the other end of said first member extending outwardly from said one end of said body; a second member having a threaded shank at one end thereof accommodated in said opening and extending from said other end of said body into said chamber in sliding telescoping, relative rotating relation with said one end of said first member; and bearing means at other ends of said members for engagement with said pulleys, whereby rotation in one direction of said body, relative to said members effects elongation of said tool.
Claim 5
Dependent Claim
30 words
A tool as set forth in claim 1 wherein said one end of said first member has a socket therein for the accommodation of said shank of said second member.
Claim 6
Dependent Claim
23 words
A tool as set forth in claim 1 wherein said first member comprises a plurality of separate parts removably coupled in end-to-end relation.
Claim 7
Dependent Claim
39 words
A tool as set forth in claim 3 wherein each of said plurality of parts has a socket at one end thereof and a stem at the other end thereof removably accommodated in the socket of the adjacent part.
Claim 8
Dependent Claim
27 words
A tool as set forth in claim 4 including cooperable retaining means on at least one of said parts for separably maintaining said parts in assembled relation.
Claim 9
Dependent Claim
25 words
A tool as set forth in claim 4 including cooperable retaining means on each of said parts for separably maintaining said parts in assembled relation.
Claim 10
Dependent Claim
40 words
A tool as set forth in claim 6 wherein said retaining means comprises radially compressible and expansible ring means on one of said parts and a groove in the other of said parts for removable accommodation of said ring means.
Claim 11
Dependent Claim
37 words
A tool as set forth in claim 1 wherein each of said bearing means comprises an arm adapted to be accommodated in the groove of its associated pulley, whereby said members are non-rotatable relatively to said pulleys.
Claim 12
Dependent Claim
15 words
A tool as set forth in claim 8 wherein each of said arms is arcuate.
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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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |